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* Chart.js v4.4.1\n * https://www.chartjs.org\n * (c) 2023 Chart.js Contributors\n * Released under the MIT License\n */\nimport { r as requestAnimFrame, a as resolve, e as effects, c as color, i as isObject, d as defaults, b as isArray, v as valueOrDefault, u as unlistenArrayEvents, l as listenArrayEvents, f as resolveObjectKey, g as isNumberFinite, h as defined, s as sign, j as createContext, k as isNullOrUndef, _ as _arrayUnique, t as toRadians, m as toPercentage, n as toDimension, T as TAU, o as formatNumber, p as _angleBetween, H as HALF_PI, P as PI, q as _getStartAndCountOfVisiblePoints, w as _scaleRangesChanged, x as isNumber, y as _parseObjectDataRadialScale, z as getRelativePosition, A as _rlookupByKey, B as _lookupByKey, C as _isPointInArea, D as getAngleFromPoint, E as toPadding, F as each, G as getMaximumSize, I as _getParentNode, J as readUsedSize, K as supportsEventListenerOptions, L as throttled, M as _isDomSupported, N as _factorize, O as finiteOrDefault, Q as callback, R as _addGrace, S as _limitValue, U as toDegrees, V as _measureText, W as _int16Range, X as _alignPixel, Y as clipArea, Z as renderText, $ as unclipArea, a0 as toFont, a1 as _toLeftRightCenter, a2 as _alignStartEnd, a3 as overrides, a4 as merge, a5 as _capitalize, a6 as descriptors, a7 as isFunction, a8 as _attachContext, a9 as _createResolver, aa as _descriptors, ab as mergeIf, ac as uid, ad as debounce, ae as retinaScale, af as clearCanvas, ag as setsEqual, ah as _elementsEqual, ai as _isClickEvent, aj as _isBetween, ak as _readValueToProps, al as _updateBezierControlPoints, am as _computeSegments, an as _boundSegments, ao as _steppedInterpolation, ap as _bezierInterpolation, aq as _pointInLine, ar as _steppedLineTo, as as _bezierCurveTo, at as drawPoint, au as addRoundedRectPath, av as toTRBL, aw as toTRBLCorners, ax as _boundSegment, ay as _normalizeAngle, az as getRtlAdapter, aA as overrideTextDirection, aB as _textX, aC as restoreTextDirection, aD as drawPointLegend, aE as distanceBetweenPoints, aF as noop, aG as _setMinAndMaxByKey, aH as niceNum, aI as almostWhole, aJ as almostEquals, aK as _decimalPlaces, aL as Ticks, aM as log10, aN as _longestText, aO as _filterBetween, aP as _lookup } from './chunks/helpers.segment.js';\nimport '@kurkle/color';\n\nclass Animator {\n    constructor(){\n        this._request = null;\n        this._charts = new Map();\n        this._running = false;\n        this._lastDate = undefined;\n    }\n _notify(chart, anims, date, type) {\n        const callbacks = anims.listeners[type];\n        const numSteps = anims.duration;\n        callbacks.forEach((fn)=>fn({\n                chart,\n                initial: anims.initial,\n                numSteps,\n                currentStep: Math.min(date - anims.start, numSteps)\n            }));\n    }\n _refresh() {\n        if (this._request) {\n            return;\n        }\n        this._running = true;\n        this._request = requestAnimFrame.call(window, ()=>{\n            this._update();\n            this._request = null;\n            if (this._running) {\n                this._refresh();\n            }\n        });\n    }\n _update(date = Date.now()) {\n        let remaining = 0;\n        this._charts.forEach((anims, chart)=>{\n            if (!anims.running || !anims.items.length) {\n                return;\n            }\n            const items = anims.items;\n            let i = items.length - 1;\n            let draw = false;\n            let item;\n            for(; i >= 0; --i){\n                item = items[i];\n                if (item._active) {\n                    if (item._total > anims.duration) {\n                        anims.duration = item._total;\n                    }\n                    item.tick(date);\n                    draw = true;\n                } else {\n                    items[i] = items[items.length - 1];\n                    items.pop();\n                }\n            }\n            if (draw) {\n                chart.draw();\n                this._notify(chart, anims, date, 'progress');\n            }\n            if (!items.length) {\n                anims.running = false;\n                this._notify(chart, anims, date, 'complete');\n                anims.initial = false;\n            }\n            remaining += items.length;\n        });\n        this._lastDate = date;\n        if (remaining === 0) {\n            this._running = false;\n        }\n    }\n _getAnims(chart) {\n        const charts = this._charts;\n        let anims = charts.get(chart);\n        if (!anims) {\n            anims = {\n                running: false,\n                initial: true,\n                items: [],\n                listeners: {\n                    complete: [],\n                    progress: []\n                }\n            };\n            charts.set(chart, anims);\n        }\n        return anims;\n    }\n listen(chart, event, cb) {\n        this._getAnims(chart).listeners[event].push(cb);\n    }\n add(chart, items) {\n        if (!items || !items.length) {\n            return;\n        }\n        this._getAnims(chart).items.push(...items);\n    }\n has(chart) {\n        return this._getAnims(chart).items.length > 0;\n    }\n start(chart) {\n        const anims = this._charts.get(chart);\n        if (!anims) {\n            return;\n        }\n        anims.running = true;\n        anims.start = Date.now();\n        anims.duration = anims.items.reduce((acc, cur)=>Math.max(acc, cur._duration), 0);\n        this._refresh();\n    }\n    running(chart) {\n        if (!this._running) {\n            return false;\n        }\n        const anims = this._charts.get(chart);\n        if (!anims || !anims.running || !anims.items.length) {\n            return false;\n        }\n        return true;\n    }\n stop(chart) {\n        const anims = this._charts.get(chart);\n        if (!anims || !anims.items.length) {\n            return;\n        }\n        const items = anims.items;\n        let i = items.length - 1;\n        for(; i >= 0; --i){\n            items[i].cancel();\n        }\n        anims.items = [];\n        this._notify(chart, anims, Date.now(), 'complete');\n    }\n remove(chart) {\n        return this._charts.delete(chart);\n    }\n}\nvar animator = /* #__PURE__ */ new Animator();\n\nconst transparent = 'transparent';\nconst interpolators = {\n    boolean (from, to, factor) {\n        return factor > 0.5 ? to : from;\n    },\n color (from, to, factor) {\n        const c0 = color(from || transparent);\n        const c1 = c0.valid && color(to || transparent);\n        return c1 && c1.valid ? c1.mix(c0, factor).hexString() : to;\n    },\n    number (from, to, factor) {\n        return from + (to - from) * factor;\n    }\n};\nclass Animation {\n    constructor(cfg, target, prop, to){\n        const currentValue = target[prop];\n        to = resolve([\n            cfg.to,\n            to,\n            currentValue,\n            cfg.from\n        ]);\n        const from = resolve([\n            cfg.from,\n            currentValue,\n            to\n        ]);\n        this._active = true;\n        this._fn = cfg.fn || interpolators[cfg.type || typeof from];\n        this._easing = effects[cfg.easing] || effects.linear;\n        this._start = Math.floor(Date.now() + (cfg.delay || 0));\n        this._duration = this._total = Math.floor(cfg.duration);\n        this._loop = !!cfg.loop;\n        this._target = target;\n        this._prop = prop;\n        this._from = from;\n        this._to = to;\n        this._promises = undefined;\n    }\n    active() {\n        return this._active;\n    }\n    update(cfg, to, date) {\n        if (this._active) {\n            this._notify(false);\n            const currentValue = this._target[this._prop];\n            const elapsed = date - this._start;\n            const remain = this._duration - elapsed;\n            this._start = date;\n            this._duration = Math.floor(Math.max(remain, cfg.duration));\n            this._total += elapsed;\n            this._loop = !!cfg.loop;\n            this._to = resolve([\n                cfg.to,\n                to,\n                currentValue,\n                cfg.from\n            ]);\n            this._from = resolve([\n                cfg.from,\n                currentValue,\n                to\n            ]);\n        }\n    }\n    cancel() {\n        if (this._active) {\n            this.tick(Date.now());\n            this._active = false;\n            this._notify(false);\n        }\n    }\n    tick(date) {\n        const elapsed = date - this._start;\n        const duration = this._duration;\n        const prop = this._prop;\n        const from = this._from;\n        const loop = this._loop;\n        const to = this._to;\n        let factor;\n        this._active = from !== to && (loop || elapsed < duration);\n        if (!this._active) {\n            this._target[prop] = to;\n            this._notify(true);\n            return;\n        }\n        if (elapsed < 0) {\n            this._target[prop] = from;\n            return;\n        }\n        factor = elapsed / duration % 2;\n        factor = loop && factor > 1 ? 2 - factor : factor;\n        factor = this._easing(Math.min(1, Math.max(0, factor)));\n        this._target[prop] = this._fn(from, to, factor);\n    }\n    wait() {\n        const promises = this._promises || (this._promises = []);\n        return new Promise((res, rej)=>{\n            promises.push({\n                res,\n                rej\n            });\n        });\n    }\n    _notify(resolved) {\n        const method = resolved ? 'res' : 'rej';\n        const promises = this._promises || [];\n        for(let i = 0; i < promises.length; i++){\n            promises[i][method]();\n        }\n    }\n}\n\nclass Animations {\n    constructor(chart, config){\n        this._chart = chart;\n        this._properties = new Map();\n        this.configure(config);\n    }\n    configure(config) {\n        if (!isObject(config)) {\n            return;\n        }\n        const animationOptions = Object.keys(defaults.animation);\n        const animatedProps = this._properties;\n        Object.getOwnPropertyNames(config).forEach((key)=>{\n            const cfg = config[key];\n            if (!isObject(cfg)) {\n                return;\n            }\n            const resolved = {};\n            for (const option of animationOptions){\n                resolved[option] = cfg[option];\n            }\n            (isArray(cfg.properties) && cfg.properties || [\n                key\n            ]).forEach((prop)=>{\n                if (prop === key || !animatedProps.has(prop)) {\n                    animatedProps.set(prop, resolved);\n                }\n            });\n        });\n    }\n _animateOptions(target, values) {\n        const newOptions = values.options;\n        const options = resolveTargetOptions(target, newOptions);\n        if (!options) {\n            return [];\n        }\n        const animations = this._createAnimations(options, newOptions);\n        if (newOptions.$shared) {\n            awaitAll(target.options.$animations, newOptions).then(()=>{\n                target.options = newOptions;\n            }, ()=>{\n            });\n        }\n        return animations;\n    }\n _createAnimations(target, values) {\n        const animatedProps = this._properties;\n        const animations = [];\n        const running = target.$animations || (target.$animations = {});\n        const props = Object.keys(values);\n        const date = Date.now();\n        let i;\n        for(i = props.length - 1; i >= 0; --i){\n            const prop = props[i];\n            if (prop.charAt(0) === '$') {\n                continue;\n            }\n            if (prop === 'options') {\n                animations.push(...this._animateOptions(target, values));\n                continue;\n            }\n            const value = values[prop];\n            let animation = running[prop];\n            const cfg = animatedProps.get(prop);\n            if (animation) {\n                if (cfg && animation.active()) {\n                    animation.update(cfg, value, date);\n                    continue;\n                } else {\n                    animation.cancel();\n                }\n            }\n            if (!cfg || !cfg.duration) {\n                target[prop] = value;\n                continue;\n            }\n            running[prop] = animation = new Animation(cfg, target, prop, value);\n            animations.push(animation);\n        }\n        return animations;\n    }\n update(target, values) {\n        if (this._properties.size === 0) {\n            Object.assign(target, values);\n            return;\n        }\n        const animations = this._createAnimations(target, values);\n        if (animations.length) {\n            animator.add(this._chart, animations);\n            return true;\n        }\n    }\n}\nfunction awaitAll(animations, properties) {\n    const running = [];\n    const keys = Object.keys(properties);\n    for(let i = 0; i < keys.length; i++){\n        const anim = animations[keys[i]];\n        if (anim && anim.active()) {\n            running.push(anim.wait());\n        }\n    }\n    return Promise.all(running);\n}\nfunction resolveTargetOptions(target, newOptions) {\n    if (!newOptions) {\n        return;\n    }\n    let options = target.options;\n    if (!options) {\n        target.options = newOptions;\n        return;\n    }\n    if (options.$shared) {\n        target.options = options = Object.assign({}, options, {\n            $shared: false,\n            $animations: {}\n        });\n    }\n    return options;\n}\n\nfunction scaleClip(scale, allowedOverflow) {\n    const opts = scale && scale.options || {};\n    const reverse = opts.reverse;\n    const min = opts.min === undefined ? allowedOverflow : 0;\n    const max = opts.max === undefined ? allowedOverflow : 0;\n    return {\n        start: reverse ? max : min,\n        end: reverse ? min : max\n    };\n}\nfunction defaultClip(xScale, yScale, allowedOverflow) {\n    if (allowedOverflow === false) {\n        return false;\n    }\n    const x = scaleClip(xScale, allowedOverflow);\n    const y = scaleClip(yScale, allowedOverflow);\n    return {\n        top: y.end,\n        right: x.end,\n        bottom: y.start,\n        left: x.start\n    };\n}\nfunction toClip(value) {\n    let t, r, b, l;\n    if (isObject(value)) {\n        t = value.top;\n        r = value.right;\n        b = value.bottom;\n        l = value.left;\n    } else {\n        t = r = b = l = value;\n    }\n    return {\n        top: t,\n        right: r,\n        bottom: b,\n        left: l,\n        disabled: value === false\n    };\n}\nfunction getSortedDatasetIndices(chart, filterVisible) {\n    const keys = [];\n    const metasets = chart._getSortedDatasetMetas(filterVisible);\n    let i, ilen;\n    for(i = 0, ilen = metasets.length; i < ilen; ++i){\n        keys.push(metasets[i].index);\n    }\n    return keys;\n}\nfunction applyStack(stack, value, dsIndex, options = {}) {\n    const keys = stack.keys;\n    const singleMode = options.mode === 'single';\n    let i, ilen, datasetIndex, otherValue;\n    if (value === null) {\n        return;\n    }\n    for(i = 0, ilen = keys.length; i < ilen; ++i){\n        datasetIndex = +keys[i];\n        if (datasetIndex === dsIndex) {\n            if (options.all) {\n                continue;\n            }\n            break;\n        }\n        otherValue = stack.values[datasetIndex];\n        if (isNumberFinite(otherValue) && (singleMode || value === 0 || sign(value) === sign(otherValue))) {\n            value += otherValue;\n        }\n    }\n    return value;\n}\nfunction convertObjectDataToArray(data) {\n    const keys = Object.keys(data);\n    const adata = new Array(keys.length);\n    let i, ilen, key;\n    for(i = 0, ilen = keys.length; i < ilen; ++i){\n        key = keys[i];\n        adata[i] = {\n            x: key,\n            y: data[key]\n        };\n    }\n    return adata;\n}\nfunction isStacked(scale, meta) {\n    const stacked = scale && scale.options.stacked;\n    return stacked || stacked === undefined && meta.stack !== undefined;\n}\nfunction getStackKey(indexScale, valueScale, meta) {\n    return `${indexScale.id}.${valueScale.id}.${meta.stack || meta.type}`;\n}\nfunction getUserBounds(scale) {\n    const { min , max , minDefined , maxDefined  } = scale.getUserBounds();\n    return {\n        min: minDefined ? min : Number.NEGATIVE_INFINITY,\n        max: maxDefined ? max : Number.POSITIVE_INFINITY\n    };\n}\nfunction getOrCreateStack(stacks, stackKey, indexValue) {\n    const subStack = stacks[stackKey] || (stacks[stackKey] = {});\n    return subStack[indexValue] || (subStack[indexValue] = {});\n}\nfunction getLastIndexInStack(stack, vScale, positive, type) {\n    for (const meta of vScale.getMatchingVisibleMetas(type).reverse()){\n        const value = stack[meta.index];\n        if (positive && value > 0 || !positive && value < 0) {\n            return meta.index;\n        }\n    }\n    return null;\n}\nfunction updateStacks(controller, parsed) {\n    const { chart , _cachedMeta: meta  } = controller;\n    const stacks = chart._stacks || (chart._stacks = {});\n    const { iScale , vScale , index: datasetIndex  } = meta;\n    const iAxis = iScale.axis;\n    const vAxis = vScale.axis;\n    const key = getStackKey(iScale, vScale, meta);\n    const ilen = parsed.length;\n    let stack;\n    for(let i = 0; i < ilen; ++i){\n        const item = parsed[i];\n        const { [iAxis]: index , [vAxis]: value  } = item;\n        const itemStacks = item._stacks || (item._stacks = {});\n        stack = itemStacks[vAxis] = getOrCreateStack(stacks, key, index);\n        stack[datasetIndex] = value;\n        stack._top = getLastIndexInStack(stack, vScale, true, meta.type);\n        stack._bottom = getLastIndexInStack(stack, vScale, false, meta.type);\n        const visualValues = stack._visualValues || (stack._visualValues = {});\n        visualValues[datasetIndex] = value;\n    }\n}\nfunction getFirstScaleId(chart, axis) {\n    const scales = chart.scales;\n    return Object.keys(scales).filter((key)=>scales[key].axis === axis).shift();\n}\nfunction createDatasetContext(parent, index) {\n    return createContext(parent, {\n        active: false,\n        dataset: undefined,\n        datasetIndex: index,\n        index,\n        mode: 'default',\n        type: 'dataset'\n    });\n}\nfunction createDataContext(parent, index, element) {\n    return createContext(parent, {\n        active: false,\n        dataIndex: index,\n        parsed: undefined,\n        raw: undefined,\n        element,\n        index,\n        mode: 'default',\n        type: 'data'\n    });\n}\nfunction clearStacks(meta, items) {\n    const datasetIndex = meta.controller.index;\n    const axis = meta.vScale && meta.vScale.axis;\n    if (!axis) {\n        return;\n    }\n    items = items || meta._parsed;\n    for (const parsed of items){\n        const stacks = parsed._stacks;\n        if (!stacks || stacks[axis] === undefined || stacks[axis][datasetIndex] === undefined) {\n            return;\n        }\n        delete stacks[axis][datasetIndex];\n        if (stacks[axis]._visualValues !== undefined && stacks[axis]._visualValues[datasetIndex] !== undefined) {\n            delete stacks[axis]._visualValues[datasetIndex];\n        }\n    }\n}\nconst isDirectUpdateMode = (mode)=>mode === 'reset' || mode === 'none';\nconst cloneIfNotShared = (cached, shared)=>shared ? cached : Object.assign({}, cached);\nconst createStack = (canStack, meta, chart)=>canStack && !meta.hidden && meta._stacked && {\n        keys: getSortedDatasetIndices(chart, true),\n        values: null\n    };\nclass DatasetController {\n static defaults = {};\n static datasetElementType = null;\n static dataElementType = null;\n constructor(chart, datasetIndex){\n        this.chart = chart;\n        this._ctx = chart.ctx;\n        this.index = datasetIndex;\n        this._cachedDataOpts = {};\n        this._cachedMeta = this.getMeta();\n        this._type = this._cachedMeta.type;\n        this.options = undefined;\n         this._parsing = false;\n        this._data = undefined;\n        this._objectData = undefined;\n        this._sharedOptions = undefined;\n        this._drawStart = undefined;\n        this._drawCount = undefined;\n        this.enableOptionSharing = false;\n        this.supportsDecimation = false;\n        this.$context = undefined;\n        this._syncList = [];\n        this.datasetElementType = new.target.datasetElementType;\n        this.dataElementType = new.target.dataElementType;\n        this.initialize();\n    }\n    initialize() {\n        const meta = this._cachedMeta;\n        this.configure();\n        this.linkScales();\n        meta._stacked = isStacked(meta.vScale, meta);\n        this.addElements();\n        if (this.options.fill && !this.chart.isPluginEnabled('filler')) {\n            console.warn(\"Tried to use the 'fill' option without the 'Filler' plugin enabled. Please import and register the 'Filler' plugin and make sure it is not disabled in the options\");\n        }\n    }\n    updateIndex(datasetIndex) {\n        if (this.index !== datasetIndex) {\n            clearStacks(this._cachedMeta);\n        }\n        this.index = datasetIndex;\n    }\n    linkScales() {\n        const chart = this.chart;\n        const meta = this._cachedMeta;\n        const dataset = this.getDataset();\n        const chooseId = (axis, x, y, r)=>axis === 'x' ? x : axis === 'r' ? r : y;\n        const xid = meta.xAxisID = valueOrDefault(dataset.xAxisID, getFirstScaleId(chart, 'x'));\n        const yid = meta.yAxisID = valueOrDefault(dataset.yAxisID, getFirstScaleId(chart, 'y'));\n        const rid = meta.rAxisID = valueOrDefault(dataset.rAxisID, getFirstScaleId(chart, 'r'));\n        const indexAxis = meta.indexAxis;\n        const iid = meta.iAxisID = chooseId(indexAxis, xid, yid, rid);\n        const vid = meta.vAxisID = chooseId(indexAxis, yid, xid, rid);\n        meta.xScale = this.getScaleForId(xid);\n        meta.yScale = this.getScaleForId(yid);\n        meta.rScale = this.getScaleForId(rid);\n        meta.iScale = this.getScaleForId(iid);\n        meta.vScale = this.getScaleForId(vid);\n    }\n    getDataset() {\n        return this.chart.data.datasets[this.index];\n    }\n    getMeta() {\n        return this.chart.getDatasetMeta(this.index);\n    }\n getScaleForId(scaleID) {\n        return this.chart.scales[scaleID];\n    }\n _getOtherScale(scale) {\n        const meta = this._cachedMeta;\n        return scale === meta.iScale ? meta.vScale : meta.iScale;\n    }\n    reset() {\n        this._update('reset');\n    }\n _destroy() {\n        const meta = this._cachedMeta;\n        if (this._data) {\n            unlistenArrayEvents(this._data, this);\n        }\n        if (meta._stacked) {\n            clearStacks(meta);\n        }\n    }\n _dataCheck() {\n        const dataset = this.getDataset();\n        const data = dataset.data || (dataset.data = []);\n        const _data = this._data;\n        if (isObject(data)) {\n            this._data = convertObjectDataToArray(data);\n        } else if (_data !== data) {\n            if (_data) {\n                unlistenArrayEvents(_data, this);\n                const meta = this._cachedMeta;\n                clearStacks(meta);\n                meta._parsed = [];\n            }\n            if (data && Object.isExtensible(data)) {\n                listenArrayEvents(data, this);\n            }\n            this._syncList = [];\n            this._data = data;\n        }\n    }\n    addElements() {\n        const meta = this._cachedMeta;\n        this._dataCheck();\n        if (this.datasetElementType) {\n            meta.dataset = new this.datasetElementType();\n        }\n    }\n    buildOrUpdateElements(resetNewElements) {\n        const meta = this._cachedMeta;\n        const dataset = this.getDataset();\n        let stackChanged = false;\n        this._dataCheck();\n        const oldStacked = meta._stacked;\n        meta._stacked = isStacked(meta.vScale, meta);\n        if (meta.stack !== dataset.stack) {\n            stackChanged = true;\n            clearStacks(meta);\n            meta.stack = dataset.stack;\n        }\n        this._resyncElements(resetNewElements);\n        if (stackChanged || oldStacked !== meta._stacked) {\n            updateStacks(this, meta._parsed);\n        }\n    }\n configure() {\n        const config = this.chart.config;\n        const scopeKeys = config.datasetScopeKeys(this._type);\n        const scopes = config.getOptionScopes(this.getDataset(), scopeKeys, true);\n        this.options = config.createResolver(scopes, this.getContext());\n        this._parsing = this.options.parsing;\n        this._cachedDataOpts = {};\n    }\n parse(start, count) {\n        const { _cachedMeta: meta , _data: data  } = this;\n        const { iScale , _stacked  } = meta;\n        const iAxis = iScale.axis;\n        let sorted = start === 0 && count === data.length ? true : meta._sorted;\n        let prev = start > 0 && meta._parsed[start - 1];\n        let i, cur, parsed;\n        if (this._parsing === false) {\n            meta._parsed = data;\n            meta._sorted = true;\n            parsed = data;\n        } else {\n            if (isArray(data[start])) {\n                parsed = this.parseArrayData(meta, data, start, count);\n            } else if (isObject(data[start])) {\n                parsed = this.parseObjectData(meta, data, start, count);\n            } else {\n                parsed = this.parsePrimitiveData(meta, data, start, count);\n            }\n            const isNotInOrderComparedToPrev = ()=>cur[iAxis] === null || prev && cur[iAxis] < prev[iAxis];\n            for(i = 0; i < count; ++i){\n                meta._parsed[i + start] = cur = parsed[i];\n                if (sorted) {\n                    if (isNotInOrderComparedToPrev()) {\n                        sorted = false;\n                    }\n                    prev = cur;\n                }\n            }\n            meta._sorted = sorted;\n        }\n        if (_stacked) {\n            updateStacks(this, parsed);\n        }\n    }\n parsePrimitiveData(meta, data, start, count) {\n        const { iScale , vScale  } = meta;\n        const iAxis = iScale.axis;\n        const vAxis = vScale.axis;\n        const labels = iScale.getLabels();\n        const singleScale = iScale === vScale;\n        const parsed = new Array(count);\n        let i, ilen, index;\n        for(i = 0, ilen = count; i < ilen; ++i){\n            index = i + start;\n            parsed[i] = {\n                [iAxis]: singleScale || iScale.parse(labels[index], index),\n                [vAxis]: vScale.parse(data[index], index)\n            };\n        }\n        return parsed;\n    }\n parseArrayData(meta, data, start, count) {\n        const { xScale , yScale  } = meta;\n        const parsed = new Array(count);\n        let i, ilen, index, item;\n        for(i = 0, ilen = count; i < ilen; ++i){\n            index = i + start;\n            item = data[index];\n            parsed[i] = {\n                x: xScale.parse(item[0], index),\n                y: yScale.parse(item[1], index)\n            };\n        }\n        return parsed;\n    }\n parseObjectData(meta, data, start, count) {\n        const { xScale , yScale  } = meta;\n        const { xAxisKey ='x' , yAxisKey ='y'  } = this._parsing;\n        const parsed = new Array(count);\n        let i, ilen, index, item;\n        for(i = 0, ilen = count; i < ilen; ++i){\n            index = i + start;\n            item = data[index];\n            parsed[i] = {\n                x: xScale.parse(resolveObjectKey(item, xAxisKey), index),\n                y: yScale.parse(resolveObjectKey(item, yAxisKey), index)\n            };\n        }\n        return parsed;\n    }\n getParsed(index) {\n        return this._cachedMeta._parsed[index];\n    }\n getDataElement(index) {\n        return this._cachedMeta.data[index];\n    }\n applyStack(scale, parsed, mode) {\n        const chart = this.chart;\n        const meta = this._cachedMeta;\n        const value = parsed[scale.axis];\n        const stack = {\n            keys: getSortedDatasetIndices(chart, true),\n            values: parsed._stacks[scale.axis]._visualValues\n        };\n        return applyStack(stack, value, meta.index, {\n            mode\n        });\n    }\n updateRangeFromParsed(range, scale, parsed, stack) {\n        const parsedValue = parsed[scale.axis];\n        let value = parsedValue === null ? NaN : parsedValue;\n        const values = stack && parsed._stacks[scale.axis];\n        if (stack && values) {\n            stack.values = values;\n            value = applyStack(stack, parsedValue, this._cachedMeta.index);\n        }\n        range.min = Math.min(range.min, value);\n        range.max = Math.max(range.max, value);\n    }\n getMinMax(scale, canStack) {\n        const meta = this._cachedMeta;\n        const _parsed = meta._parsed;\n        const sorted = meta._sorted && scale === meta.iScale;\n        const ilen = _parsed.length;\n        const otherScale = this._getOtherScale(scale);\n        const stack = createStack(canStack, meta, this.chart);\n        const range = {\n            min: Number.POSITIVE_INFINITY,\n            max: Number.NEGATIVE_INFINITY\n        };\n        const { min: otherMin , max: otherMax  } = getUserBounds(otherScale);\n        let i, parsed;\n        function _skip() {\n            parsed = _parsed[i];\n            const otherValue = parsed[otherScale.axis];\n            return !isNumberFinite(parsed[scale.axis]) || otherMin > otherValue || otherMax < otherValue;\n        }\n        for(i = 0; i < ilen; ++i){\n            if (_skip()) {\n                continue;\n            }\n            this.updateRangeFromParsed(range, scale, parsed, stack);\n            if (sorted) {\n                break;\n            }\n        }\n        if (sorted) {\n            for(i = ilen - 1; i >= 0; --i){\n                if (_skip()) {\n                    continue;\n                }\n                this.updateRangeFromParsed(range, scale, parsed, stack);\n                break;\n            }\n        }\n        return range;\n    }\n    getAllParsedValues(scale) {\n        const parsed = this._cachedMeta._parsed;\n        const values = [];\n        let i, ilen, value;\n        for(i = 0, ilen = parsed.length; i < ilen; ++i){\n            value = parsed[i][scale.axis];\n            if (isNumberFinite(value)) {\n                values.push(value);\n            }\n        }\n        return values;\n    }\n getMaxOverflow() {\n        return false;\n    }\n getLabelAndValue(index) {\n        const meta = this._cachedMeta;\n        const iScale = meta.iScale;\n        const vScale = meta.vScale;\n        const parsed = this.getParsed(index);\n        return {\n            label: iScale ? '' + iScale.getLabelForValue(parsed[iScale.axis]) : '',\n            value: vScale ? '' + vScale.getLabelForValue(parsed[vScale.axis]) : ''\n        };\n    }\n _update(mode) {\n        const meta = this._cachedMeta;\n        this.update(mode || 'default');\n        meta._clip = toClip(valueOrDefault(this.options.clip, defaultClip(meta.xScale, meta.yScale, this.getMaxOverflow())));\n    }\n update(mode) {}\n    draw() {\n        const ctx = this._ctx;\n        const chart = this.chart;\n        const meta = this._cachedMeta;\n        const elements = meta.data || [];\n        const area = chart.chartArea;\n        const active = [];\n        const start = this._drawStart || 0;\n        const count = this._drawCount || elements.length - start;\n        const drawActiveElementsOnTop = this.options.drawActiveElementsOnTop;\n        let i;\n        if (meta.dataset) {\n            meta.dataset.draw(ctx, area, start, count);\n        }\n        for(i = start; i < start + count; ++i){\n            const element = elements[i];\n            if (element.hidden) {\n                continue;\n            }\n            if (element.active && drawActiveElementsOnTop) {\n                active.push(element);\n            } else {\n                element.draw(ctx, area);\n            }\n        }\n        for(i = 0; i < active.length; ++i){\n            active[i].draw(ctx, area);\n        }\n    }\n getStyle(index, active) {\n        const mode = active ? 'active' : 'default';\n        return index === undefined && this._cachedMeta.dataset ? this.resolveDatasetElementOptions(mode) : this.resolveDataElementOptions(index || 0, mode);\n    }\n getContext(index, active, mode) {\n        const dataset = this.getDataset();\n        let context;\n        if (index >= 0 && index < this._cachedMeta.data.length) {\n            const element = this._cachedMeta.data[index];\n            context = element.$context || (element.$context = createDataContext(this.getContext(), index, element));\n            context.parsed = this.getParsed(index);\n            context.raw = dataset.data[index];\n            context.index = context.dataIndex = index;\n        } else {\n            context = this.$context || (this.$context = createDatasetContext(this.chart.getContext(), this.index));\n            context.dataset = dataset;\n            context.index = context.datasetIndex = this.index;\n        }\n        context.active = !!active;\n        context.mode = mode;\n        return context;\n    }\n resolveDatasetElementOptions(mode) {\n        return this._resolveElementOptions(this.datasetElementType.id, mode);\n    }\n resolveDataElementOptions(index, mode) {\n        return this._resolveElementOptions(this.dataElementType.id, mode, index);\n    }\n _resolveElementOptions(elementType, mode = 'default', index) {\n        const active = mode === 'active';\n        const cache = this._cachedDataOpts;\n        const cacheKey = elementType + '-' + mode;\n        const cached = cache[cacheKey];\n        const sharing = this.enableOptionSharing && defined(index);\n        if (cached) {\n            return cloneIfNotShared(cached, sharing);\n        }\n        const config = this.chart.config;\n        const scopeKeys = config.datasetElementScopeKeys(this._type, elementType);\n        const prefixes = active ? [\n            `${elementType}Hover`,\n            'hover',\n            elementType,\n            ''\n        ] : [\n            elementType,\n            ''\n        ];\n        const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);\n        const names = Object.keys(defaults.elements[elementType]);\n        const context = ()=>this.getContext(index, active, mode);\n        const values = config.resolveNamedOptions(scopes, names, context, prefixes);\n        if (values.$shared) {\n            values.$shared = sharing;\n            cache[cacheKey] = Object.freeze(cloneIfNotShared(values, sharing));\n        }\n        return values;\n    }\n _resolveAnimations(index, transition, active) {\n        const chart = this.chart;\n        const cache = this._cachedDataOpts;\n        const cacheKey = `animation-${transition}`;\n        const cached = cache[cacheKey];\n        if (cached) {\n            return cached;\n        }\n        let options;\n        if (chart.options.animation !== false) {\n            const config = this.chart.config;\n            const scopeKeys = config.datasetAnimationScopeKeys(this._type, transition);\n            const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);\n            options = config.createResolver(scopes, this.getContext(index, active, transition));\n        }\n        const animations = new Animations(chart, options && options.animations);\n        if (options && options._cacheable) {\n            cache[cacheKey] = Object.freeze(animations);\n        }\n        return animations;\n    }\n getSharedOptions(options) {\n        if (!options.$shared) {\n            return;\n        }\n        return this._sharedOptions || (this._sharedOptions = Object.assign({}, options));\n    }\n includeOptions(mode, sharedOptions) {\n        return !sharedOptions || isDirectUpdateMode(mode) || this.chart._animationsDisabled;\n    }\n _getSharedOptions(start, mode) {\n        const firstOpts = this.resolveDataElementOptions(start, mode);\n        const previouslySharedOptions = this._sharedOptions;\n        const sharedOptions = this.getSharedOptions(firstOpts);\n        const includeOptions = this.includeOptions(mode, sharedOptions) || sharedOptions !== previouslySharedOptions;\n        this.updateSharedOptions(sharedOptions, mode, firstOpts);\n        return {\n            sharedOptions,\n            includeOptions\n        };\n    }\n updateElement(element, index, properties, mode) {\n        if (isDirectUpdateMode(mode)) {\n            Object.assign(element, properties);\n        } else {\n            this._resolveAnimations(index, mode).update(element, properties);\n        }\n    }\n updateSharedOptions(sharedOptions, mode, newOptions) {\n        if (sharedOptions && !isDirectUpdateMode(mode)) {\n            this._resolveAnimations(undefined, mode).update(sharedOptions, newOptions);\n        }\n    }\n _setStyle(element, index, mode, active) {\n        element.active = active;\n        const options = this.getStyle(index, active);\n        this._resolveAnimations(index, mode, active).update(element, {\n            options: !active && this.getSharedOptions(options) || options\n        });\n    }\n    removeHoverStyle(element, datasetIndex, index) {\n        this._setStyle(element, index, 'active', false);\n    }\n    setHoverStyle(element, datasetIndex, index) {\n        this._setStyle(element, index, 'active', true);\n    }\n _removeDatasetHoverStyle() {\n        const element = this._cachedMeta.dataset;\n        if (element) {\n            this._setStyle(element, undefined, 'active', false);\n        }\n    }\n _setDatasetHoverStyle() {\n        const element = this._cachedMeta.dataset;\n        if (element) {\n            this._setStyle(element, undefined, 'active', true);\n        }\n    }\n _resyncElements(resetNewElements) {\n        const data = this._data;\n        const elements = this._cachedMeta.data;\n        for (const [method, arg1, arg2] of this._syncList){\n            this[method](arg1, arg2);\n        }\n        this._syncList = [];\n        const numMeta = elements.length;\n        const numData = data.length;\n        const count = Math.min(numData, numMeta);\n        if (count) {\n            this.parse(0, count);\n        }\n        if (numData > numMeta) {\n            this._insertElements(numMeta, numData - numMeta, resetNewElements);\n        } else if (numData < numMeta) {\n            this._removeElements(numData, numMeta - numData);\n        }\n    }\n _insertElements(start, count, resetNewElements = true) {\n        const meta = this._cachedMeta;\n        const data = meta.data;\n        const end = start + count;\n        let i;\n        const move = (arr)=>{\n            arr.length += count;\n            for(i = arr.length - 1; i >= end; i--){\n                arr[i] = arr[i - count];\n            }\n        };\n        move(data);\n        for(i = start; i < end; ++i){\n            data[i] = new this.dataElementType();\n        }\n        if (this._parsing) {\n            move(meta._parsed);\n        }\n        this.parse(start, count);\n        if (resetNewElements) {\n            this.updateElements(data, start, count, 'reset');\n        }\n    }\n    updateElements(element, start, count, mode) {}\n _removeElements(start, count) {\n        const meta = this._cachedMeta;\n        if (this._parsing) {\n            const removed = meta._parsed.splice(start, count);\n            if (meta._stacked) {\n                clearStacks(meta, removed);\n            }\n        }\n        meta.data.splice(start, count);\n    }\n _sync(args) {\n        if (this._parsing) {\n            this._syncList.push(args);\n        } else {\n            const [method, arg1, arg2] = args;\n            this[method](arg1, arg2);\n        }\n        this.chart._dataChanges.push([\n            this.index,\n            ...args\n        ]);\n    }\n    _onDataPush() {\n        const count = arguments.length;\n        this._sync([\n            '_insertElements',\n            this.getDataset().data.length - count,\n            count\n        ]);\n    }\n    _onDataPop() {\n        this._sync([\n            '_removeElements',\n            this._cachedMeta.data.length - 1,\n            1\n        ]);\n    }\n    _onDataShift() {\n        this._sync([\n            '_removeElements',\n            0,\n            1\n        ]);\n    }\n    _onDataSplice(start, count) {\n        if (count) {\n            this._sync([\n                '_removeElements',\n                start,\n                count\n            ]);\n        }\n        const newCount = arguments.length - 2;\n        if (newCount) {\n            this._sync([\n                '_insertElements',\n                start,\n                newCount\n            ]);\n        }\n    }\n    _onDataUnshift() {\n        this._sync([\n            '_insertElements',\n            0,\n            arguments.length\n        ]);\n    }\n}\n\nfunction getAllScaleValues(scale, type) {\n    if (!scale._cache.$bar) {\n        const visibleMetas = scale.getMatchingVisibleMetas(type);\n        let values = [];\n        for(let i = 0, ilen = visibleMetas.length; i < ilen; i++){\n            values = values.concat(visibleMetas[i].controller.getAllParsedValues(scale));\n        }\n        scale._cache.$bar = _arrayUnique(values.sort((a, b)=>a - b));\n    }\n    return scale._cache.$bar;\n}\n function computeMinSampleSize(meta) {\n    const scale = meta.iScale;\n    const values = getAllScaleValues(scale, meta.type);\n    let min = scale._length;\n    let i, ilen, curr, prev;\n    const updateMinAndPrev = ()=>{\n        if (curr === 32767 || curr === -32768) {\n            return;\n        }\n        if (defined(prev)) {\n            min = Math.min(min, Math.abs(curr - prev) || min);\n        }\n        prev = curr;\n    };\n    for(i = 0, ilen = values.length; i < ilen; ++i){\n        curr = scale.getPixelForValue(values[i]);\n        updateMinAndPrev();\n    }\n    prev = undefined;\n    for(i = 0, ilen = scale.ticks.length; i < ilen; ++i){\n        curr = scale.getPixelForTick(i);\n        updateMinAndPrev();\n    }\n    return min;\n}\n function computeFitCategoryTraits(index, ruler, options, stackCount) {\n    const thickness = options.barThickness;\n    let size, ratio;\n    if (isNullOrUndef(thickness)) {\n        size = ruler.min * options.categoryPercentage;\n        ratio = options.barPercentage;\n    } else {\n        size = thickness * stackCount;\n        ratio = 1;\n    }\n    return {\n        chunk: size / stackCount,\n        ratio,\n        start: ruler.pixels[index] - size / 2\n    };\n}\n function computeFlexCategoryTraits(index, ruler, options, stackCount) {\n    const pixels = ruler.pixels;\n    const curr = pixels[index];\n    let prev = index > 0 ? pixels[index - 1] : null;\n    let next = index < pixels.length - 1 ? pixels[index + 1] : null;\n    const percent = options.categoryPercentage;\n    if (prev === null) {\n        prev = curr - (next === null ? ruler.end - ruler.start : next - curr);\n    }\n    if (next === null) {\n        next = curr + curr - prev;\n    }\n    const start = curr - (curr - Math.min(prev, next)) / 2 * percent;\n    const size = Math.abs(next - prev) / 2 * percent;\n    return {\n        chunk: size / stackCount,\n        ratio: options.barPercentage,\n        start\n    };\n}\nfunction parseFloatBar(entry, item, vScale, i) {\n    const startValue = vScale.parse(entry[0], i);\n    const endValue = vScale.parse(entry[1], i);\n    const min = Math.min(startValue, endValue);\n    const max = Math.max(startValue, endValue);\n    let barStart = min;\n    let barEnd = max;\n    if (Math.abs(min) > Math.abs(max)) {\n        barStart = max;\n        barEnd = min;\n    }\n    item[vScale.axis] = barEnd;\n    item._custom = {\n        barStart,\n        barEnd,\n        start: startValue,\n        end: endValue,\n        min,\n        max\n    };\n}\nfunction parseValue(entry, item, vScale, i) {\n    if (isArray(entry)) {\n        parseFloatBar(entry, item, vScale, i);\n    } else {\n        item[vScale.axis] = vScale.parse(entry, i);\n    }\n    return item;\n}\nfunction parseArrayOrPrimitive(meta, data, start, count) {\n    const iScale = meta.iScale;\n    const vScale = meta.vScale;\n    const labels = iScale.getLabels();\n    const singleScale = iScale === vScale;\n    const parsed = [];\n    let i, ilen, item, entry;\n    for(i = start, ilen = start + count; i < ilen; ++i){\n        entry = data[i];\n        item = {};\n        item[iScale.axis] = singleScale || iScale.parse(labels[i], i);\n        parsed.push(parseValue(entry, item, vScale, i));\n    }\n    return parsed;\n}\nfunction isFloatBar(custom) {\n    return custom && custom.barStart !== undefined && custom.barEnd !== undefined;\n}\nfunction barSign(size, vScale, actualBase) {\n    if (size !== 0) {\n        return sign(size);\n    }\n    return (vScale.isHorizontal() ? 1 : -1) * (vScale.min >= actualBase ? 1 : -1);\n}\nfunction borderProps(properties) {\n    let reverse, start, end, top, bottom;\n    if (properties.horizontal) {\n        reverse = properties.base > properties.x;\n        start = 'left';\n        end = 'right';\n    } else {\n        reverse = properties.base < properties.y;\n        start = 'bottom';\n        end = 'top';\n    }\n    if (reverse) {\n        top = 'end';\n        bottom = 'start';\n    } else {\n        top = 'start';\n        bottom = 'end';\n    }\n    return {\n        start,\n        end,\n        reverse,\n        top,\n        bottom\n    };\n}\nfunction setBorderSkipped(properties, options, stack, index) {\n    let edge = options.borderSkipped;\n    const res = {};\n    if (!edge) {\n        properties.borderSkipped = res;\n        return;\n    }\n    if (edge === true) {\n        properties.borderSkipped = {\n            top: true,\n            right: true,\n            bottom: true,\n            left: true\n        };\n        return;\n    }\n    const { start , end , reverse , top , bottom  } = borderProps(properties);\n    if (edge === 'middle' && stack) {\n        properties.enableBorderRadius = true;\n        if ((stack._top || 0) === index) {\n            edge = top;\n        } else if ((stack._bottom || 0) === index) {\n            edge = bottom;\n        } else {\n            res[parseEdge(bottom, start, end, reverse)] = true;\n            edge = top;\n        }\n    }\n    res[parseEdge(edge, start, end, reverse)] = true;\n    properties.borderSkipped = res;\n}\nfunction parseEdge(edge, a, b, reverse) {\n    if (reverse) {\n        edge = swap(edge, a, b);\n        edge = startEnd(edge, b, a);\n    } else {\n        edge = startEnd(edge, a, b);\n    }\n    return edge;\n}\nfunction swap(orig, v1, v2) {\n    return orig === v1 ? v2 : orig === v2 ? v1 : orig;\n}\nfunction startEnd(v, start, end) {\n    return v === 'start' ? start : v === 'end' ? end : v;\n}\nfunction setInflateAmount(properties, { inflateAmount  }, ratio) {\n    properties.inflateAmount = inflateAmount === 'auto' ? ratio === 1 ? 0.33 : 0 : inflateAmount;\n}\nclass BarController extends DatasetController {\n    static id = 'bar';\n static defaults = {\n        datasetElementType: false,\n        dataElementType: 'bar',\n        categoryPercentage: 0.8,\n        barPercentage: 0.9,\n        grouped: true,\n        animations: {\n            numbers: {\n                type: 'number',\n                properties: [\n                    'x',\n                    'y',\n                    'base',\n                    'width',\n                    'height'\n                ]\n            }\n        }\n    };\n static overrides = {\n        scales: {\n            _index_: {\n                type: 'category',\n                offset: true,\n                grid: {\n                    offset: true\n                }\n            },\n            _value_: {\n                type: 'linear',\n                beginAtZero: true\n            }\n        }\n    };\n parsePrimitiveData(meta, data, start, count) {\n        return parseArrayOrPrimitive(meta, data, start, count);\n    }\n parseArrayData(meta, data, start, count) {\n        return parseArrayOrPrimitive(meta, data, start, count);\n    }\n parseObjectData(meta, data, start, count) {\n        const { iScale , vScale  } = meta;\n        const { xAxisKey ='x' , yAxisKey ='y'  } = this._parsing;\n        const iAxisKey = iScale.axis === 'x' ? xAxisKey : yAxisKey;\n        const vAxisKey = vScale.axis === 'x' ? xAxisKey : yAxisKey;\n        const parsed = [];\n        let i, ilen, item, obj;\n        for(i = start, ilen = start + count; i < ilen; ++i){\n            obj = data[i];\n            item = {};\n            item[iScale.axis] = iScale.parse(resolveObjectKey(obj, iAxisKey), i);\n            parsed.push(parseValue(resolveObjectKey(obj, vAxisKey), item, vScale, i));\n        }\n        return parsed;\n    }\n updateRangeFromParsed(range, scale, parsed, stack) {\n        super.updateRangeFromParsed(range, scale, parsed, stack);\n        const custom = parsed._custom;\n        if (custom && scale === this._cachedMeta.vScale) {\n            range.min = Math.min(range.min, custom.min);\n            range.max = Math.max(range.max, custom.max);\n        }\n    }\n getMaxOverflow() {\n        return 0;\n    }\n getLabelAndValue(index) {\n        const meta = this._cachedMeta;\n        const { iScale , vScale  } = meta;\n        const parsed = this.getParsed(index);\n        const custom = parsed._custom;\n        const value = isFloatBar(custom) ? '[' + custom.start + ', ' + custom.end + ']' : '' + vScale.getLabelForValue(parsed[vScale.axis]);\n        return {\n            label: '' + iScale.getLabelForValue(parsed[iScale.axis]),\n            value\n        };\n    }\n    initialize() {\n        this.enableOptionSharing = true;\n        super.initialize();\n        const meta = this._cachedMeta;\n        meta.stack = this.getDataset().stack;\n    }\n    update(mode) {\n        const meta = this._cachedMeta;\n        this.updateElements(meta.data, 0, meta.data.length, mode);\n    }\n    updateElements(bars, start, count, mode) {\n        const reset = mode === 'reset';\n        const { index , _cachedMeta: { vScale  }  } = this;\n        const base = vScale.getBasePixel();\n        const horizontal = vScale.isHorizontal();\n        const ruler = this._getRuler();\n        const { sharedOptions , includeOptions  } = this._getSharedOptions(start, mode);\n        for(let i = start; i < start + count; i++){\n            const parsed = this.getParsed(i);\n            const vpixels = reset || isNullOrUndef(parsed[vScale.axis]) ? {\n                base,\n                head: base\n            } : this._calculateBarValuePixels(i);\n            const ipixels = this._calculateBarIndexPixels(i, ruler);\n            const stack = (parsed._stacks || {})[vScale.axis];\n            const properties = {\n                horizontal,\n                base: vpixels.base,\n                enableBorderRadius: !stack || isFloatBar(parsed._custom) || index === stack._top || index === stack._bottom,\n                x: horizontal ? vpixels.head : ipixels.center,\n                y: horizontal ? ipixels.center : vpixels.head,\n                height: horizontal ? ipixels.size : Math.abs(vpixels.size),\n                width: horizontal ? Math.abs(vpixels.size) : ipixels.size\n            };\n            if (includeOptions) {\n                properties.options = sharedOptions || this.resolveDataElementOptions(i, bars[i].active ? 'active' : mode);\n            }\n            const options = properties.options || bars[i].options;\n            setBorderSkipped(properties, options, stack, index);\n            setInflateAmount(properties, options, ruler.ratio);\n            this.updateElement(bars[i], i, properties, mode);\n        }\n    }\n _getStacks(last, dataIndex) {\n        const { iScale  } = this._cachedMeta;\n        const metasets = iScale.getMatchingVisibleMetas(this._type).filter((meta)=>meta.controller.options.grouped);\n        const stacked = iScale.options.stacked;\n        const stacks = [];\n        const skipNull = (meta)=>{\n            const parsed = meta.controller.getParsed(dataIndex);\n            const val = parsed && parsed[meta.vScale.axis];\n            if (isNullOrUndef(val) || isNaN(val)) {\n                return true;\n            }\n        };\n        for (const meta of metasets){\n            if (dataIndex !== undefined && skipNull(meta)) {\n                continue;\n            }\n            if (stacked === false || stacks.indexOf(meta.stack) === -1 || stacked === undefined && meta.stack === undefined) {\n                stacks.push(meta.stack);\n            }\n            if (meta.index === last) {\n                break;\n            }\n        }\n        if (!stacks.length) {\n            stacks.push(undefined);\n        }\n        return stacks;\n    }\n _getStackCount(index) {\n        return this._getStacks(undefined, index).length;\n    }\n _getStackIndex(datasetIndex, name, dataIndex) {\n        const stacks = this._getStacks(datasetIndex, dataIndex);\n        const index = name !== undefined ? stacks.indexOf(name) : -1;\n        return index === -1 ? stacks.length - 1 : index;\n    }\n _getRuler() {\n        const opts = this.options;\n        const meta = this._cachedMeta;\n        const iScale = meta.iScale;\n        const pixels = [];\n        let i, ilen;\n        for(i = 0, ilen = meta.data.length; i < ilen; ++i){\n            pixels.push(iScale.getPixelForValue(this.getParsed(i)[iScale.axis], i));\n        }\n        const barThickness = opts.barThickness;\n        const min = barThickness || computeMinSampleSize(meta);\n        return {\n            min,\n            pixels,\n            start: iScale._startPixel,\n            end: iScale._endPixel,\n            stackCount: this._getStackCount(),\n            scale: iScale,\n            grouped: opts.grouped,\n            ratio: barThickness ? 1 : opts.categoryPercentage * opts.barPercentage\n        };\n    }\n _calculateBarValuePixels(index) {\n        const { _cachedMeta: { vScale , _stacked , index: datasetIndex  } , options: { base: baseValue , minBarLength  }  } = this;\n        const actualBase = baseValue || 0;\n        const parsed = this.getParsed(index);\n        const custom = parsed._custom;\n        const floating = isFloatBar(custom);\n        let value = parsed[vScale.axis];\n        let start = 0;\n        let length = _stacked ? this.applyStack(vScale, parsed, _stacked) : value;\n        let head, size;\n        if (length !== value) {\n            start = length - value;\n            length = value;\n        }\n        if (floating) {\n            value = custom.barStart;\n            length = custom.barEnd - custom.barStart;\n            if (value !== 0 && sign(value) !== sign(custom.barEnd)) {\n                start = 0;\n            }\n            start += value;\n        }\n        const startValue = !isNullOrUndef(baseValue) && !floating ? baseValue : start;\n        let base = vScale.getPixelForValue(startValue);\n        if (this.chart.getDataVisibility(index)) {\n            head = vScale.getPixelForValue(start + length);\n        } else {\n            head = base;\n        }\n        size = head - base;\n        if (Math.abs(size) < minBarLength) {\n            size = barSign(size, vScale, actualBase) * minBarLength;\n            if (value === actualBase) {\n                base -= size / 2;\n            }\n            const startPixel = vScale.getPixelForDecimal(0);\n            const endPixel = vScale.getPixelForDecimal(1);\n            const min = Math.min(startPixel, endPixel);\n            const max = Math.max(startPixel, endPixel);\n            base = Math.max(Math.min(base, max), min);\n            head = base + size;\n            if (_stacked && !floating) {\n                parsed._stacks[vScale.axis]._visualValues[datasetIndex] = vScale.getValueForPixel(head) - vScale.getValueForPixel(base);\n            }\n        }\n        if (base === vScale.getPixelForValue(actualBase)) {\n            const halfGrid = sign(size) * vScale.getLineWidthForValue(actualBase) / 2;\n            base += halfGrid;\n            size -= halfGrid;\n        }\n        return {\n            size,\n            base,\n            head,\n            center: head + size / 2\n        };\n    }\n _calculateBarIndexPixels(index, ruler) {\n        const scale = ruler.scale;\n        const options = this.options;\n        const skipNull = options.skipNull;\n        const maxBarThickness = valueOrDefault(options.maxBarThickness, Infinity);\n        let center, size;\n        if (ruler.grouped) {\n            const stackCount = skipNull ? this._getStackCount(index) : ruler.stackCount;\n            const range = options.barThickness === 'flex' ? computeFlexCategoryTraits(index, ruler, options, stackCount) : computeFitCategoryTraits(index, ruler, options, stackCount);\n            const stackIndex = this._getStackIndex(this.index, this._cachedMeta.stack, skipNull ? index : undefined);\n            center = range.start + range.chunk * stackIndex + range.chunk / 2;\n            size = Math.min(maxBarThickness, range.chunk * range.ratio);\n        } else {\n            center = scale.getPixelForValue(this.getParsed(index)[scale.axis], index);\n            size = Math.min(maxBarThickness, ruler.min * ruler.ratio);\n        }\n        return {\n            base: center - size / 2,\n            head: center + size / 2,\n            center,\n            size\n        };\n    }\n    draw() {\n        const meta = this._cachedMeta;\n        const vScale = meta.vScale;\n        const rects = meta.data;\n        const ilen = rects.length;\n        let i = 0;\n        for(; i < ilen; ++i){\n            if (this.getParsed(i)[vScale.axis] !== null) {\n                rects[i].draw(this._ctx);\n            }\n        }\n    }\n}\n\nclass BubbleController extends DatasetController {\n    static id = 'bubble';\n static defaults = {\n        datasetElementType: false,\n        dataElementType: 'point',\n        animations: {\n            numbers: {\n                type: 'number',\n                properties: [\n                    'x',\n                    'y',\n                    'borderWidth',\n                    'radius'\n                ]\n            }\n        }\n    };\n static overrides = {\n        scales: {\n            x: {\n                type: 'linear'\n            },\n            y: {\n                type: 'linear'\n            }\n        }\n    };\n    initialize() {\n        this.enableOptionSharing = true;\n        super.initialize();\n    }\n parsePrimitiveData(meta, data, start, count) {\n        const parsed = super.parsePrimitiveData(meta, data, start, count);\n        for(let i = 0; i < parsed.length; i++){\n            parsed[i]._custom = this.resolveDataElementOptions(i + start).radius;\n        }\n        return parsed;\n    }\n parseArrayData(meta, data, start, count) {\n        const parsed = super.parseArrayData(meta, data, start, count);\n        for(let i = 0; i < parsed.length; i++){\n            const item = data[start + i];\n            parsed[i]._custom = valueOrDefault(item[2], this.resolveDataElementOptions(i + start).radius);\n        }\n        return parsed;\n    }\n parseObjectData(meta, data, start, count) {\n        const parsed = super.parseObjectData(meta, data, start, count);\n        for(let i = 0; i < parsed.length; i++){\n            const item = data[start + i];\n            parsed[i]._custom = valueOrDefault(item && item.r && +item.r, this.resolveDataElementOptions(i + start).radius);\n        }\n        return parsed;\n    }\n getMaxOverflow() {\n        const data = this._cachedMeta.data;\n        let max = 0;\n        for(let i = data.length - 1; i >= 0; --i){\n            max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);\n        }\n        return max > 0 && max;\n    }\n getLabelAndValue(index) {\n        const meta = this._cachedMeta;\n        const labels = this.chart.data.labels || [];\n        const { xScale , yScale  } = meta;\n        const parsed = this.getParsed(index);\n        const x = xScale.getLabelForValue(parsed.x);\n        const y = yScale.getLabelForValue(parsed.y);\n        const r = parsed._custom;\n        return {\n            label: labels[index] || '',\n            value: '(' + x + ', ' + y + (r ? ', ' + r : '') + ')'\n        };\n    }\n    update(mode) {\n        const points = this._cachedMeta.data;\n        this.updateElements(points, 0, points.length, mode);\n    }\n    updateElements(points, start, count, mode) {\n        const reset = mode === 'reset';\n        const { iScale , vScale  } = this._cachedMeta;\n        const { sharedOptions , includeOptions  } = this._getSharedOptions(start, mode);\n        const iAxis = iScale.axis;\n        const vAxis = vScale.axis;\n        for(let i = start; i < start + count; i++){\n            const point = points[i];\n            const parsed = !reset && this.getParsed(i);\n            const properties = {};\n            const iPixel = properties[iAxis] = reset ? iScale.getPixelForDecimal(0.5) : iScale.getPixelForValue(parsed[iAxis]);\n            const vPixel = properties[vAxis] = reset ? vScale.getBasePixel() : vScale.getPixelForValue(parsed[vAxis]);\n            properties.skip = isNaN(iPixel) || isNaN(vPixel);\n            if (includeOptions) {\n                properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n                if (reset) {\n                    properties.options.radius = 0;\n                }\n            }\n            this.updateElement(point, i, properties, mode);\n        }\n    }\n resolveDataElementOptions(index, mode) {\n        const parsed = this.getParsed(index);\n        let values = super.resolveDataElementOptions(index, mode);\n        if (values.$shared) {\n            values = Object.assign({}, values, {\n                $shared: false\n            });\n        }\n        const radius = values.radius;\n        if (mode !== 'active') {\n            values.radius = 0;\n        }\n        values.radius += valueOrDefault(parsed && parsed._custom, radius);\n        return values;\n    }\n}\n\nfunction getRatioAndOffset(rotation, circumference, cutout) {\n    let ratioX = 1;\n    let ratioY = 1;\n    let offsetX = 0;\n    let offsetY = 0;\n    if (circumference < TAU) {\n        const startAngle = rotation;\n        const endAngle = startAngle + circumference;\n        const startX = Math.cos(startAngle);\n        const startY = Math.sin(startAngle);\n        const endX = Math.cos(endAngle);\n        const endY = Math.sin(endAngle);\n        const calcMax = (angle, a, b)=>_angleBetween(angle, startAngle, endAngle, true) ? 1 : Math.max(a, a * cutout, b, b * cutout);\n        const calcMin = (angle, a, b)=>_angleBetween(angle, startAngle, endAngle, true) ? -1 : Math.min(a, a * cutout, b, b * cutout);\n        const maxX = calcMax(0, startX, endX);\n        const maxY = calcMax(HALF_PI, startY, endY);\n        const minX = calcMin(PI, startX, endX);\n        const minY = calcMin(PI + HALF_PI, startY, endY);\n        ratioX = (maxX - minX) / 2;\n        ratioY = (maxY - minY) / 2;\n        offsetX = -(maxX + minX) / 2;\n        offsetY = -(maxY + minY) / 2;\n    }\n    return {\n        ratioX,\n        ratioY,\n        offsetX,\n        offsetY\n    };\n}\nclass DoughnutController extends DatasetController {\n    static id = 'doughnut';\n static defaults = {\n        datasetElementType: false,\n        dataElementType: 'arc',\n        animation: {\n            animateRotate: true,\n            animateScale: false\n        },\n        animations: {\n            numbers: {\n                type: 'number',\n                properties: [\n                    'circumference',\n                    'endAngle',\n                    'innerRadius',\n                    'outerRadius',\n                    'startAngle',\n                    'x',\n                    'y',\n                    'offset',\n                    'borderWidth',\n                    'spacing'\n                ]\n            }\n        },\n        cutout: '50%',\n        rotation: 0,\n        circumference: 360,\n        radius: '100%',\n        spacing: 0,\n        indexAxis: 'r'\n    };\n    static descriptors = {\n        _scriptable: (name)=>name !== 'spacing',\n        _indexable: (name)=>name !== 'spacing' && !name.startsWith('borderDash') && !name.startsWith('hoverBorderDash')\n    };\n static overrides = {\n        aspectRatio: 1,\n        plugins: {\n            legend: {\n                labels: {\n                    generateLabels (chart) {\n                        const data = chart.data;\n                        if (data.labels.length && data.datasets.length) {\n                            const { labels: { pointStyle , color  }  } = chart.legend.options;\n                            return data.labels.map((label, i)=>{\n                                const meta = chart.getDatasetMeta(0);\n                                const style = meta.controller.getStyle(i);\n                                return {\n                                    text: label,\n                                    fillStyle: style.backgroundColor,\n                                    strokeStyle: style.borderColor,\n                                    fontColor: color,\n                                    lineWidth: style.borderWidth,\n                                    pointStyle: pointStyle,\n                                    hidden: !chart.getDataVisibility(i),\n                                    index: i\n                                };\n                            });\n                        }\n                        return [];\n                    }\n                },\n                onClick (e, legendItem, legend) {\n                    legend.chart.toggleDataVisibility(legendItem.index);\n                    legend.chart.update();\n                }\n            }\n        }\n    };\n    constructor(chart, datasetIndex){\n        super(chart, datasetIndex);\n        this.enableOptionSharing = true;\n        this.innerRadius = undefined;\n        this.outerRadius = undefined;\n        this.offsetX = undefined;\n        this.offsetY = undefined;\n    }\n    linkScales() {}\n parse(start, count) {\n        const data = this.getDataset().data;\n        const meta = this._cachedMeta;\n        if (this._parsing === false) {\n            meta._parsed = data;\n        } else {\n            let getter = (i)=>+data[i];\n            if (isObject(data[start])) {\n                const { key ='value'  } = this._parsing;\n                getter = (i)=>+resolveObjectKey(data[i], key);\n            }\n            let i, ilen;\n            for(i = start, ilen = start + count; i < ilen; ++i){\n                meta._parsed[i] = getter(i);\n            }\n        }\n    }\n _getRotation() {\n        return toRadians(this.options.rotation - 90);\n    }\n _getCircumference() {\n        return toRadians(this.options.circumference);\n    }\n _getRotationExtents() {\n        let min = TAU;\n        let max = -TAU;\n        for(let i = 0; i < this.chart.data.datasets.length; ++i){\n            if (this.chart.isDatasetVisible(i) && this.chart.getDatasetMeta(i).type === this._type) {\n                const controller = this.chart.getDatasetMeta(i).controller;\n                const rotation = controller._getRotation();\n                const circumference = controller._getCircumference();\n                min = Math.min(min, rotation);\n                max = Math.max(max, rotation + circumference);\n            }\n        }\n        return {\n            rotation: min,\n            circumference: max - min\n        };\n    }\n update(mode) {\n        const chart = this.chart;\n        const { chartArea  } = chart;\n        const meta = this._cachedMeta;\n        const arcs = meta.data;\n        const spacing = this.getMaxBorderWidth() + this.getMaxOffset(arcs) + this.options.spacing;\n        const maxSize = Math.max((Math.min(chartArea.width, chartArea.height) - spacing) / 2, 0);\n        const cutout = Math.min(toPercentage(this.options.cutout, maxSize), 1);\n        const chartWeight = this._getRingWeight(this.index);\n        const { circumference , rotation  } = this._getRotationExtents();\n        const { ratioX , ratioY , offsetX , offsetY  } = getRatioAndOffset(rotation, circumference, cutout);\n        const maxWidth = (chartArea.width - spacing) / ratioX;\n        const maxHeight = (chartArea.height - spacing) / ratioY;\n        const maxRadius = Math.max(Math.min(maxWidth, maxHeight) / 2, 0);\n        const outerRadius = toDimension(this.options.radius, maxRadius);\n        const innerRadius = Math.max(outerRadius * cutout, 0);\n        const radiusLength = (outerRadius - innerRadius) / this._getVisibleDatasetWeightTotal();\n        this.offsetX = offsetX * outerRadius;\n        this.offsetY = offsetY * outerRadius;\n        meta.total = this.calculateTotal();\n        this.outerRadius = outerRadius - radiusLength * this._getRingWeightOffset(this.index);\n        this.innerRadius = Math.max(this.outerRadius - radiusLength * chartWeight, 0);\n        this.updateElements(arcs, 0, arcs.length, mode);\n    }\n _circumference(i, reset) {\n        const opts = this.options;\n        const meta = this._cachedMeta;\n        const circumference = this._getCircumference();\n        if (reset && opts.animation.animateRotate || !this.chart.getDataVisibility(i) || meta._parsed[i] === null || meta.data[i].hidden) {\n            return 0;\n        }\n        return this.calculateCircumference(meta._parsed[i] * circumference / TAU);\n    }\n    updateElements(arcs, start, count, mode) {\n        const reset = mode === 'reset';\n        const chart = this.chart;\n        const chartArea = chart.chartArea;\n        const opts = chart.options;\n        const animationOpts = opts.animation;\n        const centerX = (chartArea.left + chartArea.right) / 2;\n        const centerY = (chartArea.top + chartArea.bottom) / 2;\n        const animateScale = reset && animationOpts.animateScale;\n        const innerRadius = animateScale ? 0 : this.innerRadius;\n        const outerRadius = animateScale ? 0 : this.outerRadius;\n        const { sharedOptions , includeOptions  } = this._getSharedOptions(start, mode);\n        let startAngle = this._getRotation();\n        let i;\n        for(i = 0; i < start; ++i){\n            startAngle += this._circumference(i, reset);\n        }\n        for(i = start; i < start + count; ++i){\n            const circumference = this._circumference(i, reset);\n            const arc = arcs[i];\n            const properties = {\n                x: centerX + this.offsetX,\n                y: centerY + this.offsetY,\n                startAngle,\n                endAngle: startAngle + circumference,\n                circumference,\n                outerRadius,\n                innerRadius\n            };\n            if (includeOptions) {\n                properties.options = sharedOptions || this.resolveDataElementOptions(i, arc.active ? 'active' : mode);\n            }\n            startAngle += circumference;\n            this.updateElement(arc, i, properties, mode);\n        }\n    }\n    calculateTotal() {\n        const meta = this._cachedMeta;\n        const metaData = meta.data;\n        let total = 0;\n        let i;\n        for(i = 0; i < metaData.length; i++){\n            const value = meta._parsed[i];\n            if (value !== null && !isNaN(value) && this.chart.getDataVisibility(i) && !metaData[i].hidden) {\n                total += Math.abs(value);\n            }\n        }\n        return total;\n    }\n    calculateCircumference(value) {\n        const total = this._cachedMeta.total;\n        if (total > 0 && !isNaN(value)) {\n            return TAU * (Math.abs(value) / total);\n        }\n        return 0;\n    }\n    getLabelAndValue(index) {\n        const meta = this._cachedMeta;\n        const chart = this.chart;\n        const labels = chart.data.labels || [];\n        const value = formatNumber(meta._parsed[index], chart.options.locale);\n        return {\n            label: labels[index] || '',\n            value\n        };\n    }\n    getMaxBorderWidth(arcs) {\n        let max = 0;\n        const chart = this.chart;\n        let i, ilen, meta, controller, options;\n        if (!arcs) {\n            for(i = 0, ilen = chart.data.datasets.length; i < ilen; ++i){\n                if (chart.isDatasetVisible(i)) {\n                    meta = chart.getDatasetMeta(i);\n                    arcs = meta.data;\n                    controller = meta.controller;\n                    break;\n                }\n            }\n        }\n        if (!arcs) {\n            return 0;\n        }\n        for(i = 0, ilen = arcs.length; i < ilen; ++i){\n            options = controller.resolveDataElementOptions(i);\n            if (options.borderAlign !== 'inner') {\n                max = Math.max(max, options.borderWidth || 0, options.hoverBorderWidth || 0);\n            }\n        }\n        return max;\n    }\n    getMaxOffset(arcs) {\n        let max = 0;\n        for(let i = 0, ilen = arcs.length; i < ilen; ++i){\n            const options = this.resolveDataElementOptions(i);\n            max = Math.max(max, options.offset || 0, options.hoverOffset || 0);\n        }\n        return max;\n    }\n _getRingWeightOffset(datasetIndex) {\n        let ringWeightOffset = 0;\n        for(let i = 0; i < datasetIndex; ++i){\n            if (this.chart.isDatasetVisible(i)) {\n                ringWeightOffset += this._getRingWeight(i);\n            }\n        }\n        return ringWeightOffset;\n    }\n _getRingWeight(datasetIndex) {\n        return Math.max(valueOrDefault(this.chart.data.datasets[datasetIndex].weight, 1), 0);\n    }\n _getVisibleDatasetWeightTotal() {\n        return this._getRingWeightOffset(this.chart.data.datasets.length) || 1;\n    }\n}\n\nclass LineController extends DatasetController {\n    static id = 'line';\n static defaults = {\n        datasetElementType: 'line',\n        dataElementType: 'point',\n        showLine: true,\n        spanGaps: false\n    };\n static overrides = {\n        scales: {\n            _index_: {\n                type: 'category'\n            },\n            _value_: {\n                type: 'linear'\n            }\n        }\n    };\n    initialize() {\n        this.enableOptionSharing = true;\n        this.supportsDecimation = true;\n        super.initialize();\n    }\n    update(mode) {\n        const meta = this._cachedMeta;\n        const { dataset: line , data: points = [] , _dataset  } = meta;\n        const animationsDisabled = this.chart._animationsDisabled;\n        let { start , count  } = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);\n        this._drawStart = start;\n        this._drawCount = count;\n        if (_scaleRangesChanged(meta)) {\n            start = 0;\n            count = points.length;\n        }\n        line._chart = this.chart;\n        line._datasetIndex = this.index;\n        line._decimated = !!_dataset._decimated;\n        line.points = points;\n        const options = this.resolveDatasetElementOptions(mode);\n        if (!this.options.showLine) {\n            options.borderWidth = 0;\n        }\n        options.segment = this.options.segment;\n        this.updateElement(line, undefined, {\n            animated: !animationsDisabled,\n            options\n        }, mode);\n        this.updateElements(points, start, count, mode);\n    }\n    updateElements(points, start, count, mode) {\n        const reset = mode === 'reset';\n        const { iScale , vScale , _stacked , _dataset  } = this._cachedMeta;\n        const { sharedOptions , includeOptions  } = this._getSharedOptions(start, mode);\n        const iAxis = iScale.axis;\n        const vAxis = vScale.axis;\n        const { spanGaps , segment  } = this.options;\n        const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;\n        const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';\n        const end = start + count;\n        const pointsCount = points.length;\n        let prevParsed = start > 0 && this.getParsed(start - 1);\n        for(let i = 0; i < pointsCount; ++i){\n            const point = points[i];\n            const properties = directUpdate ? point : {};\n            if (i < start || i >= end) {\n                properties.skip = true;\n                continue;\n            }\n            const parsed = this.getParsed(i);\n            const nullData = isNullOrUndef(parsed[vAxis]);\n            const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);\n            const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);\n            properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;\n            properties.stop = i > 0 && Math.abs(parsed[iAxis] - prevParsed[iAxis]) > maxGapLength;\n            if (segment) {\n                properties.parsed = parsed;\n                properties.raw = _dataset.data[i];\n            }\n            if (includeOptions) {\n                properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n            }\n            if (!directUpdate) {\n                this.updateElement(point, i, properties, mode);\n            }\n            prevParsed = parsed;\n        }\n    }\n getMaxOverflow() {\n        const meta = this._cachedMeta;\n        const dataset = meta.dataset;\n        const border = dataset.options && dataset.options.borderWidth || 0;\n        const data = meta.data || [];\n        if (!data.length) {\n            return border;\n        }\n        const firstPoint = data[0].size(this.resolveDataElementOptions(0));\n        const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));\n        return Math.max(border, firstPoint, lastPoint) / 2;\n    }\n    draw() {\n        const meta = this._cachedMeta;\n        meta.dataset.updateControlPoints(this.chart.chartArea, meta.iScale.axis);\n        super.draw();\n    }\n}\n\nclass PolarAreaController extends DatasetController {\n    static id = 'polarArea';\n static defaults = {\n        dataElementType: 'arc',\n        animation: {\n            animateRotate: true,\n            animateScale: true\n        },\n        animations: {\n            numbers: {\n                type: 'number',\n                properties: [\n                    'x',\n                    'y',\n                    'startAngle',\n                    'endAngle',\n                    'innerRadius',\n                    'outerRadius'\n                ]\n            }\n        },\n        indexAxis: 'r',\n        startAngle: 0\n    };\n static overrides = {\n        aspectRatio: 1,\n        plugins: {\n            legend: {\n                labels: {\n                    generateLabels (chart) {\n                        const data = chart.data;\n                        if (data.labels.length && data.datasets.length) {\n                            const { labels: { pointStyle , color  }  } = chart.legend.options;\n                            return data.labels.map((label, i)=>{\n                                const meta = chart.getDatasetMeta(0);\n                                const style = meta.controller.getStyle(i);\n                                return {\n                                    text: label,\n                                    fillStyle: style.backgroundColor,\n                                    strokeStyle: style.borderColor,\n                                    fontColor: color,\n                                    lineWidth: style.borderWidth,\n                                    pointStyle: pointStyle,\n                                    hidden: !chart.getDataVisibility(i),\n                                    index: i\n                                };\n                            });\n                        }\n                        return [];\n                    }\n                },\n                onClick (e, legendItem, legend) {\n                    legend.chart.toggleDataVisibility(legendItem.index);\n                    legend.chart.update();\n                }\n            }\n        },\n        scales: {\n            r: {\n                type: 'radialLinear',\n                angleLines: {\n                    display: false\n                },\n                beginAtZero: true,\n                grid: {\n                    circular: true\n                },\n                pointLabels: {\n                    display: false\n                },\n                startAngle: 0\n            }\n        }\n    };\n    constructor(chart, datasetIndex){\n        super(chart, datasetIndex);\n        this.innerRadius = undefined;\n        this.outerRadius = undefined;\n    }\n    getLabelAndValue(index) {\n        const meta = this._cachedMeta;\n        const chart = this.chart;\n        const labels = chart.data.labels || [];\n        const value = formatNumber(meta._parsed[index].r, chart.options.locale);\n        return {\n            label: labels[index] || '',\n            value\n        };\n    }\n    parseObjectData(meta, data, start, count) {\n        return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);\n    }\n    update(mode) {\n        const arcs = this._cachedMeta.data;\n        this._updateRadius();\n        this.updateElements(arcs, 0, arcs.length, mode);\n    }\n getMinMax() {\n        const meta = this._cachedMeta;\n        const range = {\n            min: Number.POSITIVE_INFINITY,\n            max: Number.NEGATIVE_INFINITY\n        };\n        meta.data.forEach((element, index)=>{\n            const parsed = this.getParsed(index).r;\n            if (!isNaN(parsed) && this.chart.getDataVisibility(index)) {\n                if (parsed < range.min) {\n                    range.min = parsed;\n                }\n                if (parsed > range.max) {\n                    range.max = parsed;\n                }\n            }\n        });\n        return range;\n    }\n _updateRadius() {\n        const chart = this.chart;\n        const chartArea = chart.chartArea;\n        const opts = chart.options;\n        const minSize = Math.min(chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);\n        const outerRadius = Math.max(minSize / 2, 0);\n        const innerRadius = Math.max(opts.cutoutPercentage ? outerRadius / 100 * opts.cutoutPercentage : 1, 0);\n        const radiusLength = (outerRadius - innerRadius) / chart.getVisibleDatasetCount();\n        this.outerRadius = outerRadius - radiusLength * this.index;\n        this.innerRadius = this.outerRadius - radiusLength;\n    }\n    updateElements(arcs, start, count, mode) {\n        const reset = mode === 'reset';\n        const chart = this.chart;\n        const opts = chart.options;\n        const animationOpts = opts.animation;\n        const scale = this._cachedMeta.rScale;\n        const centerX = scale.xCenter;\n        const centerY = scale.yCenter;\n        const datasetStartAngle = scale.getIndexAngle(0) - 0.5 * PI;\n        let angle = datasetStartAngle;\n        let i;\n        const defaultAngle = 360 / this.countVisibleElements();\n        for(i = 0; i < start; ++i){\n            angle += this._computeAngle(i, mode, defaultAngle);\n        }\n        for(i = start; i < start + count; i++){\n            const arc = arcs[i];\n            let startAngle = angle;\n            let endAngle = angle + this._computeAngle(i, mode, defaultAngle);\n            let outerRadius = chart.getDataVisibility(i) ? scale.getDistanceFromCenterForValue(this.getParsed(i).r) : 0;\n            angle = endAngle;\n            if (reset) {\n                if (animationOpts.animateScale) {\n                    outerRadius = 0;\n                }\n                if (animationOpts.animateRotate) {\n                    startAngle = endAngle = datasetStartAngle;\n                }\n            }\n            const properties = {\n                x: centerX,\n                y: centerY,\n                innerRadius: 0,\n                outerRadius,\n                startAngle,\n                endAngle,\n                options: this.resolveDataElementOptions(i, arc.active ? 'active' : mode)\n            };\n            this.updateElement(arc, i, properties, mode);\n        }\n    }\n    countVisibleElements() {\n        const meta = this._cachedMeta;\n        let count = 0;\n        meta.data.forEach((element, index)=>{\n            if (!isNaN(this.getParsed(index).r) && this.chart.getDataVisibility(index)) {\n                count++;\n            }\n        });\n        return count;\n    }\n _computeAngle(index, mode, defaultAngle) {\n        return this.chart.getDataVisibility(index) ? toRadians(this.resolveDataElementOptions(index, mode).angle || defaultAngle) : 0;\n    }\n}\n\nclass PieController extends DoughnutController {\n    static id = 'pie';\n static defaults = {\n        cutout: 0,\n        rotation: 0,\n        circumference: 360,\n        radius: '100%'\n    };\n}\n\nclass RadarController extends DatasetController {\n    static id = 'radar';\n static defaults = {\n        datasetElementType: 'line',\n        dataElementType: 'point',\n        indexAxis: 'r',\n        showLine: true,\n        elements: {\n            line: {\n                fill: 'start'\n            }\n        }\n    };\n static overrides = {\n        aspectRatio: 1,\n        scales: {\n            r: {\n                type: 'radialLinear'\n            }\n        }\n    };\n getLabelAndValue(index) {\n        const vScale = this._cachedMeta.vScale;\n        const parsed = this.getParsed(index);\n        return {\n            label: vScale.getLabels()[index],\n            value: '' + vScale.getLabelForValue(parsed[vScale.axis])\n        };\n    }\n    parseObjectData(meta, data, start, count) {\n        return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);\n    }\n    update(mode) {\n        const meta = this._cachedMeta;\n        const line = meta.dataset;\n        const points = meta.data || [];\n        const labels = meta.iScale.getLabels();\n        line.points = points;\n        if (mode !== 'resize') {\n            const options = this.resolveDatasetElementOptions(mode);\n            if (!this.options.showLine) {\n                options.borderWidth = 0;\n            }\n            const properties = {\n                _loop: true,\n                _fullLoop: labels.length === points.length,\n                options\n            };\n            this.updateElement(line, undefined, properties, mode);\n        }\n        this.updateElements(points, 0, points.length, mode);\n    }\n    updateElements(points, start, count, mode) {\n        const scale = this._cachedMeta.rScale;\n        const reset = mode === 'reset';\n        for(let i = start; i < start + count; i++){\n            const point = points[i];\n            const options = this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n            const pointPosition = scale.getPointPositionForValue(i, this.getParsed(i).r);\n            const x = reset ? scale.xCenter : pointPosition.x;\n            const y = reset ? scale.yCenter : pointPosition.y;\n            const properties = {\n                x,\n                y,\n                angle: pointPosition.angle,\n                skip: isNaN(x) || isNaN(y),\n                options\n            };\n            this.updateElement(point, i, properties, mode);\n        }\n    }\n}\n\nclass ScatterController extends DatasetController {\n    static id = 'scatter';\n static defaults = {\n        datasetElementType: false,\n        dataElementType: 'point',\n        showLine: false,\n        fill: false\n    };\n static overrides = {\n        interaction: {\n            mode: 'point'\n        },\n        scales: {\n            x: {\n                type: 'linear'\n            },\n            y: {\n                type: 'linear'\n            }\n        }\n    };\n getLabelAndValue(index) {\n        const meta = this._cachedMeta;\n        const labels = this.chart.data.labels || [];\n        const { xScale , yScale  } = meta;\n        const parsed = this.getParsed(index);\n        const x = xScale.getLabelForValue(parsed.x);\n        const y = yScale.getLabelForValue(parsed.y);\n        return {\n            label: labels[index] || '',\n            value: '(' + x + ', ' + y + ')'\n        };\n    }\n    update(mode) {\n        const meta = this._cachedMeta;\n        const { data: points = []  } = meta;\n        const animationsDisabled = this.chart._animationsDisabled;\n        let { start , count  } = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);\n        this._drawStart = start;\n        this._drawCount = count;\n        if (_scaleRangesChanged(meta)) {\n            start = 0;\n            count = points.length;\n        }\n        if (this.options.showLine) {\n            if (!this.datasetElementType) {\n                this.addElements();\n            }\n            const { dataset: line , _dataset  } = meta;\n            line._chart = this.chart;\n            line._datasetIndex = this.index;\n            line._decimated = !!_dataset._decimated;\n            line.points = points;\n            const options = this.resolveDatasetElementOptions(mode);\n            options.segment = this.options.segment;\n            this.updateElement(line, undefined, {\n                animated: !animationsDisabled,\n                options\n            }, mode);\n        } else if (this.datasetElementType) {\n            delete meta.dataset;\n            this.datasetElementType = false;\n        }\n        this.updateElements(points, start, count, mode);\n    }\n    addElements() {\n        const { showLine  } = this.options;\n        if (!this.datasetElementType && showLine) {\n            this.datasetElementType = this.chart.registry.getElement('line');\n        }\n        super.addElements();\n    }\n    updateElements(points, start, count, mode) {\n        const reset = mode === 'reset';\n        const { iScale , vScale , _stacked , _dataset  } = this._cachedMeta;\n        const firstOpts = this.resolveDataElementOptions(start, mode);\n        const sharedOptions = this.getSharedOptions(firstOpts);\n        const includeOptions = this.includeOptions(mode, sharedOptions);\n        const iAxis = iScale.axis;\n        const vAxis = vScale.axis;\n        const { spanGaps , segment  } = this.options;\n        const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;\n        const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';\n        let prevParsed = start > 0 && this.getParsed(start - 1);\n        for(let i = start; i < start + count; ++i){\n            const point = points[i];\n            const parsed = this.getParsed(i);\n            const properties = directUpdate ? point : {};\n            const nullData = isNullOrUndef(parsed[vAxis]);\n            const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);\n            const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);\n            properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;\n            properties.stop = i > 0 && Math.abs(parsed[iAxis] - prevParsed[iAxis]) > maxGapLength;\n            if (segment) {\n                properties.parsed = parsed;\n                properties.raw = _dataset.data[i];\n            }\n            if (includeOptions) {\n                properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n            }\n            if (!directUpdate) {\n                this.updateElement(point, i, properties, mode);\n            }\n            prevParsed = parsed;\n        }\n        this.updateSharedOptions(sharedOptions, mode, firstOpts);\n    }\n getMaxOverflow() {\n        const meta = this._cachedMeta;\n        const data = meta.data || [];\n        if (!this.options.showLine) {\n            let max = 0;\n            for(let i = data.length - 1; i >= 0; --i){\n                max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);\n            }\n            return max > 0 && max;\n        }\n        const dataset = meta.dataset;\n        const border = dataset.options && dataset.options.borderWidth || 0;\n        if (!data.length) {\n            return border;\n        }\n        const firstPoint = data[0].size(this.resolveDataElementOptions(0));\n        const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));\n        return Math.max(border, firstPoint, lastPoint) / 2;\n    }\n}\n\nvar controllers = /*#__PURE__*/Object.freeze({\n__proto__: null,\nBarController: BarController,\nBubbleController: BubbleController,\nDoughnutController: DoughnutController,\nLineController: LineController,\nPieController: PieController,\nPolarAreaController: PolarAreaController,\nRadarController: RadarController,\nScatterController: ScatterController\n});\n\n/**\n * @namespace Chart._adapters\n * @since 2.8.0\n * @private\n */ function abstract() {\n    throw new Error('This method is not implemented: Check that a complete date adapter is provided.');\n}\n/**\n * Date adapter (current used by the time scale)\n * @namespace Chart._adapters._date\n * @memberof Chart._adapters\n * @private\n */ class DateAdapterBase {\n    /**\n   * Override default date adapter methods.\n   * Accepts type parameter to define options type.\n   * @example\n   * Chart._adapters._date.override<{myAdapterOption: string}>({\n   *   init() {\n   *     console.log(this.options.myAdapterOption);\n   *   }\n   * })\n   */ static override(members) {\n        Object.assign(DateAdapterBase.prototype, members);\n    }\n    options;\n    constructor(options){\n        this.options = options || {};\n    }\n    // eslint-disable-next-line @typescript-eslint/no-empty-function\n    init() {}\n    formats() {\n        return abstract();\n    }\n    parse() {\n        return abstract();\n    }\n    format() {\n        return abstract();\n    }\n    add() {\n        return abstract();\n    }\n    diff() {\n        return abstract();\n    }\n    startOf() {\n        return abstract();\n    }\n    endOf() {\n        return abstract();\n    }\n}\nvar adapters = {\n    _date: DateAdapterBase\n};\n\nfunction binarySearch(metaset, axis, value, intersect) {\n    const { controller , data , _sorted  } = metaset;\n    const iScale = controller._cachedMeta.iScale;\n    if (iScale && axis === iScale.axis && axis !== 'r' && _sorted && data.length) {\n        const lookupMethod = iScale._reversePixels ? _rlookupByKey : _lookupByKey;\n        if (!intersect) {\n            return lookupMethod(data, axis, value);\n        } else if (controller._sharedOptions) {\n            const el = data[0];\n            const range = typeof el.getRange === 'function' && el.getRange(axis);\n            if (range) {\n                const start = lookupMethod(data, axis, value - range);\n                const end = lookupMethod(data, axis, value + range);\n                return {\n                    lo: start.lo,\n                    hi: end.hi\n                };\n            }\n        }\n    }\n    return {\n        lo: 0,\n        hi: data.length - 1\n    };\n}\n function evaluateInteractionItems(chart, axis, position, handler, intersect) {\n    const metasets = chart.getSortedVisibleDatasetMetas();\n    const value = position[axis];\n    for(let i = 0, ilen = metasets.length; i < ilen; ++i){\n        const { index , data  } = metasets[i];\n        const { lo , hi  } = binarySearch(metasets[i], axis, value, intersect);\n        for(let j = lo; j <= hi; ++j){\n            const element = data[j];\n            if (!element.skip) {\n                handler(element, index, j);\n            }\n        }\n    }\n}\n function getDistanceMetricForAxis(axis) {\n    const useX = axis.indexOf('x') !== -1;\n    const useY = axis.indexOf('y') !== -1;\n    return function(pt1, pt2) {\n        const deltaX = useX ? Math.abs(pt1.x - pt2.x) : 0;\n        const deltaY = useY ? Math.abs(pt1.y - pt2.y) : 0;\n        return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));\n    };\n}\n function getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) {\n    const items = [];\n    if (!includeInvisible && !chart.isPointInArea(position)) {\n        return items;\n    }\n    const evaluationFunc = function(element, datasetIndex, index) {\n        if (!includeInvisible && !_isPointInArea(element, chart.chartArea, 0)) {\n            return;\n        }\n        if (element.inRange(position.x, position.y, useFinalPosition)) {\n            items.push({\n                element,\n                datasetIndex,\n                index\n            });\n        }\n    };\n    evaluateInteractionItems(chart, axis, position, evaluationFunc, true);\n    return items;\n}\n function getNearestRadialItems(chart, position, axis, useFinalPosition) {\n    let items = [];\n    function evaluationFunc(element, datasetIndex, index) {\n        const { startAngle , endAngle  } = element.getProps([\n            'startAngle',\n            'endAngle'\n        ], useFinalPosition);\n        const { angle  } = getAngleFromPoint(element, {\n            x: position.x,\n            y: position.y\n        });\n        if (_angleBetween(angle, startAngle, endAngle)) {\n            items.push({\n                element,\n                datasetIndex,\n                index\n            });\n        }\n    }\n    evaluateInteractionItems(chart, axis, position, evaluationFunc);\n    return items;\n}\n function getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {\n    let items = [];\n    const distanceMetric = getDistanceMetricForAxis(axis);\n    let minDistance = Number.POSITIVE_INFINITY;\n    function evaluationFunc(element, datasetIndex, index) {\n        const inRange = element.inRange(position.x, position.y, useFinalPosition);\n        if (intersect && !inRange) {\n            return;\n        }\n        const center = element.getCenterPoint(useFinalPosition);\n        const pointInArea = !!includeInvisible || chart.isPointInArea(center);\n        if (!pointInArea && !inRange) {\n            return;\n        }\n        const distance = distanceMetric(position, center);\n        if (distance < minDistance) {\n            items = [\n                {\n                    element,\n                    datasetIndex,\n                    index\n                }\n            ];\n            minDistance = distance;\n        } else if (distance === minDistance) {\n            items.push({\n                element,\n                datasetIndex,\n                index\n            });\n        }\n    }\n    evaluateInteractionItems(chart, axis, position, evaluationFunc);\n    return items;\n}\n function getNearestItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {\n    if (!includeInvisible && !chart.isPointInArea(position)) {\n        return [];\n    }\n    return axis === 'r' && !intersect ? getNearestRadialItems(chart, position, axis, useFinalPosition) : getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible);\n}\n function getAxisItems(chart, position, axis, intersect, useFinalPosition) {\n    const items = [];\n    const rangeMethod = axis === 'x' ? 'inXRange' : 'inYRange';\n    let intersectsItem = false;\n    evaluateInteractionItems(chart, axis, position, (element, datasetIndex, index)=>{\n        if (element[rangeMethod](position[axis], useFinalPosition)) {\n            items.push({\n                element,\n                datasetIndex,\n                index\n            });\n            intersectsItem = intersectsItem || element.inRange(position.x, position.y, useFinalPosition);\n        }\n    });\n    if (intersect && !intersectsItem) {\n        return [];\n    }\n    return items;\n}\n var Interaction = {\n    evaluateInteractionItems,\n    modes: {\n index (chart, e, options, useFinalPosition) {\n            const position = getRelativePosition(e, chart);\n            const axis = options.axis || 'x';\n            const includeInvisible = options.includeInvisible || false;\n            const items = options.intersect ? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) : getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);\n            const elements = [];\n            if (!items.length) {\n                return [];\n            }\n            chart.getSortedVisibleDatasetMetas().forEach((meta)=>{\n                const index = items[0].index;\n                const element = meta.data[index];\n                if (element && !element.skip) {\n                    elements.push({\n                        element,\n                        datasetIndex: meta.index,\n                        index\n                    });\n                }\n            });\n            return elements;\n        },\n dataset (chart, e, options, useFinalPosition) {\n            const position = getRelativePosition(e, chart);\n            const axis = options.axis || 'xy';\n            const includeInvisible = options.includeInvisible || false;\n            let items = options.intersect ? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) : getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);\n            if (items.length > 0) {\n                const datasetIndex = items[0].datasetIndex;\n                const data = chart.getDatasetMeta(datasetIndex).data;\n                items = [];\n                for(let i = 0; i < data.length; ++i){\n                    items.push({\n                        element: data[i],\n                        datasetIndex,\n                        index: i\n                    });\n                }\n            }\n            return items;\n        },\n point (chart, e, options, useFinalPosition) {\n            const position = getRelativePosition(e, chart);\n            const axis = options.axis || 'xy';\n            const includeInvisible = options.includeInvisible || false;\n            return getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible);\n        },\n nearest (chart, e, options, useFinalPosition) {\n            const position = getRelativePosition(e, chart);\n            const axis = options.axis || 'xy';\n            const includeInvisible = options.includeInvisible || false;\n            return getNearestItems(chart, position, axis, options.intersect, useFinalPosition, includeInvisible);\n        },\n x (chart, e, options, useFinalPosition) {\n            const position = getRelativePosition(e, chart);\n            return getAxisItems(chart, position, 'x', options.intersect, useFinalPosition);\n        },\n y (chart, e, options, useFinalPosition) {\n            const position = getRelativePosition(e, chart);\n            return getAxisItems(chart, position, 'y', options.intersect, useFinalPosition);\n        }\n    }\n};\n\nconst STATIC_POSITIONS = [\n    'left',\n    'top',\n    'right',\n    'bottom'\n];\nfunction filterByPosition(array, position) {\n    return array.filter((v)=>v.pos === position);\n}\nfunction filterDynamicPositionByAxis(array, axis) {\n    return array.filter((v)=>STATIC_POSITIONS.indexOf(v.pos) === -1 && v.box.axis === axis);\n}\nfunction sortByWeight(array, reverse) {\n    return array.sort((a, b)=>{\n        const v0 = reverse ? b : a;\n        const v1 = reverse ? a : b;\n        return v0.weight === v1.weight ? v0.index - v1.index : v0.weight - v1.weight;\n    });\n}\nfunction wrapBoxes(boxes) {\n    const layoutBoxes = [];\n    let i, ilen, box, pos, stack, stackWeight;\n    for(i = 0, ilen = (boxes || []).length; i < ilen; ++i){\n        box = boxes[i];\n        ({ position: pos , options: { stack , stackWeight =1  }  } = box);\n        layoutBoxes.push({\n            index: i,\n            box,\n            pos,\n            horizontal: box.isHorizontal(),\n            weight: box.weight,\n            stack: stack && pos + stack,\n            stackWeight\n        });\n    }\n    return layoutBoxes;\n}\nfunction buildStacks(layouts) {\n    const stacks = {};\n    for (const wrap of layouts){\n        const { stack , pos , stackWeight  } = wrap;\n        if (!stack || !STATIC_POSITIONS.includes(pos)) {\n            continue;\n        }\n        const _stack = stacks[stack] || (stacks[stack] = {\n            count: 0,\n            placed: 0,\n            weight: 0,\n            size: 0\n        });\n        _stack.count++;\n        _stack.weight += stackWeight;\n    }\n    return stacks;\n}\n function setLayoutDims(layouts, params) {\n    const stacks = buildStacks(layouts);\n    const { vBoxMaxWidth , hBoxMaxHeight  } = params;\n    let i, ilen, layout;\n    for(i = 0, ilen = layouts.length; i < ilen; ++i){\n        layout = layouts[i];\n        const { fullSize  } = layout.box;\n        const stack = stacks[layout.stack];\n        const factor = stack && layout.stackWeight / stack.weight;\n        if (layout.horizontal) {\n            layout.width = factor ? factor * vBoxMaxWidth : fullSize && params.availableWidth;\n            layout.height = hBoxMaxHeight;\n        } else {\n            layout.width = vBoxMaxWidth;\n            layout.height = factor ? factor * hBoxMaxHeight : fullSize && params.availableHeight;\n        }\n    }\n    return stacks;\n}\nfunction buildLayoutBoxes(boxes) {\n    const layoutBoxes = wrapBoxes(boxes);\n    const fullSize = sortByWeight(layoutBoxes.filter((wrap)=>wrap.box.fullSize), true);\n    const left = sortByWeight(filterByPosition(layoutBoxes, 'left'), true);\n    const right = sortByWeight(filterByPosition(layoutBoxes, 'right'));\n    const top = sortByWeight(filterByPosition(layoutBoxes, 'top'), true);\n    const bottom = sortByWeight(filterByPosition(layoutBoxes, 'bottom'));\n    const centerHorizontal = filterDynamicPositionByAxis(layoutBoxes, 'x');\n    const centerVertical = filterDynamicPositionByAxis(layoutBoxes, 'y');\n    return {\n        fullSize,\n        leftAndTop: left.concat(top),\n        rightAndBottom: right.concat(centerVertical).concat(bottom).concat(centerHorizontal),\n        chartArea: filterByPosition(layoutBoxes, 'chartArea'),\n        vertical: left.concat(right).concat(centerVertical),\n        horizontal: top.concat(bottom).concat(centerHorizontal)\n    };\n}\nfunction getCombinedMax(maxPadding, chartArea, a, b) {\n    return Math.max(maxPadding[a], chartArea[a]) + Math.max(maxPadding[b], chartArea[b]);\n}\nfunction updateMaxPadding(maxPadding, boxPadding) {\n    maxPadding.top = Math.max(maxPadding.top, boxPadding.top);\n    maxPadding.left = Math.max(maxPadding.left, boxPadding.left);\n    maxPadding.bottom = Math.max(maxPadding.bottom, boxPadding.bottom);\n    maxPadding.right = Math.max(maxPadding.right, boxPadding.right);\n}\nfunction updateDims(chartArea, params, layout, stacks) {\n    const { pos , box  } = layout;\n    const maxPadding = chartArea.maxPadding;\n    if (!isObject(pos)) {\n        if (layout.size) {\n            chartArea[pos] -= layout.size;\n        }\n        const stack = stacks[layout.stack] || {\n            size: 0,\n            count: 1\n        };\n        stack.size = Math.max(stack.size, layout.horizontal ? box.height : box.width);\n        layout.size = stack.size / stack.count;\n        chartArea[pos] += layout.size;\n    }\n    if (box.getPadding) {\n        updateMaxPadding(maxPadding, box.getPadding());\n    }\n    const newWidth = Math.max(0, params.outerWidth - getCombinedMax(maxPadding, chartArea, 'left', 'right'));\n    const newHeight = Math.max(0, params.outerHeight - getCombinedMax(maxPadding, chartArea, 'top', 'bottom'));\n    const widthChanged = newWidth !== chartArea.w;\n    const heightChanged = newHeight !== chartArea.h;\n    chartArea.w = newWidth;\n    chartArea.h = newHeight;\n    return layout.horizontal ? {\n        same: widthChanged,\n        other: heightChanged\n    } : {\n        same: heightChanged,\n        other: widthChanged\n    };\n}\nfunction handleMaxPadding(chartArea) {\n    const maxPadding = chartArea.maxPadding;\n    function updatePos(pos) {\n        const change = Math.max(maxPadding[pos] - chartArea[pos], 0);\n        chartArea[pos] += change;\n        return change;\n    }\n    chartArea.y += updatePos('top');\n    chartArea.x += updatePos('left');\n    updatePos('right');\n    updatePos('bottom');\n}\nfunction getMargins(horizontal, chartArea) {\n    const maxPadding = chartArea.maxPadding;\n    function marginForPositions(positions) {\n        const margin = {\n            left: 0,\n            top: 0,\n            right: 0,\n            bottom: 0\n        };\n        positions.forEach((pos)=>{\n            margin[pos] = Math.max(chartArea[pos], maxPadding[pos]);\n        });\n        return margin;\n    }\n    return horizontal ? marginForPositions([\n        'left',\n        'right'\n    ]) : marginForPositions([\n        'top',\n        'bottom'\n    ]);\n}\nfunction fitBoxes(boxes, chartArea, params, stacks) {\n    const refitBoxes = [];\n    let i, ilen, layout, box, refit, changed;\n    for(i = 0, ilen = boxes.length, refit = 0; i < ilen; ++i){\n        layout = boxes[i];\n        box = layout.box;\n        box.update(layout.width || chartArea.w, layout.height || chartArea.h, getMargins(layout.horizontal, chartArea));\n        const { same , other  } = updateDims(chartArea, params, layout, stacks);\n        refit |= same && refitBoxes.length;\n        changed = changed || other;\n        if (!box.fullSize) {\n            refitBoxes.push(layout);\n        }\n    }\n    return refit && fitBoxes(refitBoxes, chartArea, params, stacks) || changed;\n}\nfunction setBoxDims(box, left, top, width, height) {\n    box.top = top;\n    box.left = left;\n    box.right = left + width;\n    box.bottom = top + height;\n    box.width = width;\n    box.height = height;\n}\nfunction placeBoxes(boxes, chartArea, params, stacks) {\n    const userPadding = params.padding;\n    let { x , y  } = chartArea;\n    for (const layout of boxes){\n        const box = layout.box;\n        const stack = stacks[layout.stack] || {\n            count: 1,\n            placed: 0,\n            weight: 1\n        };\n        const weight = layout.stackWeight / stack.weight || 1;\n        if (layout.horizontal) {\n            const width = chartArea.w * weight;\n            const height = stack.size || box.height;\n            if (defined(stack.start)) {\n                y = stack.start;\n            }\n            if (box.fullSize) {\n                setBoxDims(box, userPadding.left, y, params.outerWidth - userPadding.right - userPadding.left, height);\n            } else {\n                setBoxDims(box, chartArea.left + stack.placed, y, width, height);\n            }\n            stack.start = y;\n            stack.placed += width;\n            y = box.bottom;\n        } else {\n            const height = chartArea.h * weight;\n            const width = stack.size || box.width;\n            if (defined(stack.start)) {\n                x = stack.start;\n            }\n            if (box.fullSize) {\n                setBoxDims(box, x, userPadding.top, width, params.outerHeight - userPadding.bottom - userPadding.top);\n            } else {\n                setBoxDims(box, x, chartArea.top + stack.placed, width, height);\n            }\n            stack.start = x;\n            stack.placed += height;\n            x = box.right;\n        }\n    }\n    chartArea.x = x;\n    chartArea.y = y;\n}\nvar layouts = {\n addBox (chart, item) {\n        if (!chart.boxes) {\n            chart.boxes = [];\n        }\n        item.fullSize = item.fullSize || false;\n        item.position = item.position || 'top';\n        item.weight = item.weight || 0;\n        item._layers = item._layers || function() {\n            return [\n                {\n                    z: 0,\n                    draw (chartArea) {\n                        item.draw(chartArea);\n                    }\n                }\n            ];\n        };\n        chart.boxes.push(item);\n    },\n removeBox (chart, layoutItem) {\n        const index = chart.boxes ? chart.boxes.indexOf(layoutItem) : -1;\n        if (index !== -1) {\n            chart.boxes.splice(index, 1);\n        }\n    },\n configure (chart, item, options) {\n        item.fullSize = options.fullSize;\n        item.position = options.position;\n        item.weight = options.weight;\n    },\n update (chart, width, height, minPadding) {\n        if (!chart) {\n            return;\n        }\n        const padding = toPadding(chart.options.layout.padding);\n        const availableWidth = Math.max(width - padding.width, 0);\n        const availableHeight = Math.max(height - padding.height, 0);\n        const boxes = buildLayoutBoxes(chart.boxes);\n        const verticalBoxes = boxes.vertical;\n        const horizontalBoxes = boxes.horizontal;\n        each(chart.boxes, (box)=>{\n            if (typeof box.beforeLayout === 'function') {\n                box.beforeLayout();\n            }\n        });\n        const visibleVerticalBoxCount = verticalBoxes.reduce((total, wrap)=>wrap.box.options && wrap.box.options.display === false ? total : total + 1, 0) || 1;\n        const params = Object.freeze({\n            outerWidth: width,\n            outerHeight: height,\n            padding,\n            availableWidth,\n            availableHeight,\n            vBoxMaxWidth: availableWidth / 2 / visibleVerticalBoxCount,\n            hBoxMaxHeight: availableHeight / 2\n        });\n        const maxPadding = Object.assign({}, padding);\n        updateMaxPadding(maxPadding, toPadding(minPadding));\n        const chartArea = Object.assign({\n            maxPadding,\n            w: availableWidth,\n            h: availableHeight,\n            x: padding.left,\n            y: padding.top\n        }, padding);\n        const stacks = setLayoutDims(verticalBoxes.concat(horizontalBoxes), params);\n        fitBoxes(boxes.fullSize, chartArea, params, stacks);\n        fitBoxes(verticalBoxes, chartArea, params, stacks);\n        if (fitBoxes(horizontalBoxes, chartArea, params, stacks)) {\n            fitBoxes(verticalBoxes, chartArea, params, stacks);\n        }\n        handleMaxPadding(chartArea);\n        placeBoxes(boxes.leftAndTop, chartArea, params, stacks);\n        chartArea.x += chartArea.w;\n        chartArea.y += chartArea.h;\n        placeBoxes(boxes.rightAndBottom, chartArea, params, stacks);\n        chart.chartArea = {\n            left: chartArea.left,\n            top: chartArea.top,\n            right: chartArea.left + chartArea.w,\n            bottom: chartArea.top + chartArea.h,\n            height: chartArea.h,\n            width: chartArea.w\n        };\n        each(boxes.chartArea, (layout)=>{\n            const box = layout.box;\n            Object.assign(box, chart.chartArea);\n            box.update(chartArea.w, chartArea.h, {\n                left: 0,\n                top: 0,\n                right: 0,\n                bottom: 0\n            });\n        });\n    }\n};\n\nclass BasePlatform {\n acquireContext(canvas, aspectRatio) {}\n releaseContext(context) {\n        return false;\n    }\n addEventListener(chart, type, listener) {}\n removeEventListener(chart, type, listener) {}\n getDevicePixelRatio() {\n        return 1;\n    }\n getMaximumSize(element, width, height, aspectRatio) {\n        width = Math.max(0, width || element.width);\n        height = height || element.height;\n        return {\n            width,\n            height: Math.max(0, aspectRatio ? Math.floor(width / aspectRatio) : height)\n        };\n    }\n isAttached(canvas) {\n        return true;\n    }\n updateConfig(config) {\n    }\n}\n\nclass BasicPlatform extends BasePlatform {\n    acquireContext(item) {\n        return item && item.getContext && item.getContext('2d') || null;\n    }\n    updateConfig(config) {\n        config.options.animation = false;\n    }\n}\n\nconst EXPANDO_KEY = '$chartjs';\n const EVENT_TYPES = {\n    touchstart: 'mousedown',\n    touchmove: 'mousemove',\n    touchend: 'mouseup',\n    pointerenter: 'mouseenter',\n    pointerdown: 'mousedown',\n    pointermove: 'mousemove',\n    pointerup: 'mouseup',\n    pointerleave: 'mouseout',\n    pointerout: 'mouseout'\n};\nconst isNullOrEmpty = (value)=>value === null || value === '';\n function initCanvas(canvas, aspectRatio) {\n    const style = canvas.style;\n    const renderHeight = canvas.getAttribute('height');\n    const renderWidth = canvas.getAttribute('width');\n    canvas[EXPANDO_KEY] = {\n        initial: {\n            height: renderHeight,\n            width: renderWidth,\n            style: {\n                display: style.display,\n                height: style.height,\n                width: style.width\n            }\n        }\n    };\n    style.display = style.display || 'block';\n    style.boxSizing = style.boxSizing || 'border-box';\n    if (isNullOrEmpty(renderWidth)) {\n        const displayWidth = readUsedSize(canvas, 'width');\n        if (displayWidth !== undefined) {\n            canvas.width = displayWidth;\n        }\n    }\n    if (isNullOrEmpty(renderHeight)) {\n        if (canvas.style.height === '') {\n            canvas.height = canvas.width / (aspectRatio || 2);\n        } else {\n            const displayHeight = readUsedSize(canvas, 'height');\n            if (displayHeight !== undefined) {\n                canvas.height = displayHeight;\n            }\n        }\n    }\n    return canvas;\n}\nconst eventListenerOptions = supportsEventListenerOptions ? {\n    passive: true\n} : false;\nfunction addListener(node, type, listener) {\n    node.addEventListener(type, listener, eventListenerOptions);\n}\nfunction removeListener(chart, type, listener) {\n    chart.canvas.removeEventListener(type, listener, eventListenerOptions);\n}\nfunction fromNativeEvent(event, chart) {\n    const type = EVENT_TYPES[event.type] || event.type;\n    const { x , y  } = getRelativePosition(event, chart);\n    return {\n        type,\n        chart,\n        native: event,\n        x: x !== undefined ? x : null,\n        y: y !== undefined ? y : null\n    };\n}\nfunction nodeListContains(nodeList, canvas) {\n    for (const node of nodeList){\n        if (node === canvas || node.contains(canvas)) {\n            return true;\n        }\n    }\n}\nfunction createAttachObserver(chart, type, listener) {\n    const canvas = chart.canvas;\n    const observer = new MutationObserver((entries)=>{\n        let trigger = false;\n        for (const entry of entries){\n            trigger = trigger || nodeListContains(entry.addedNodes, canvas);\n            trigger = trigger && !nodeListContains(entry.removedNodes, canvas);\n        }\n        if (trigger) {\n            listener();\n        }\n    });\n    observer.observe(document, {\n        childList: true,\n        subtree: true\n    });\n    return observer;\n}\nfunction createDetachObserver(chart, type, listener) {\n    const canvas = chart.canvas;\n    const observer = new MutationObserver((entries)=>{\n        let trigger = false;\n        for (const entry of entries){\n            trigger = trigger || nodeListContains(entry.removedNodes, canvas);\n            trigger = trigger && !nodeListContains(entry.addedNodes, canvas);\n        }\n        if (trigger) {\n            listener();\n        }\n    });\n    observer.observe(document, {\n        childList: true,\n        subtree: true\n    });\n    return observer;\n}\nconst drpListeningCharts = new Map();\nlet oldDevicePixelRatio = 0;\nfunction onWindowResize() {\n    const dpr = window.devicePixelRatio;\n    if (dpr === oldDevicePixelRatio) {\n        return;\n    }\n    oldDevicePixelRatio = dpr;\n    drpListeningCharts.forEach((resize, chart)=>{\n        if (chart.currentDevicePixelRatio !== dpr) {\n            resize();\n        }\n    });\n}\nfunction listenDevicePixelRatioChanges(chart, resize) {\n    if (!drpListeningCharts.size) {\n        window.addEventListener('resize', onWindowResize);\n    }\n    drpListeningCharts.set(chart, resize);\n}\nfunction unlistenDevicePixelRatioChanges(chart) {\n    drpListeningCharts.delete(chart);\n    if (!drpListeningCharts.size) {\n        window.removeEventListener('resize', onWindowResize);\n    }\n}\nfunction createResizeObserver(chart, type, listener) {\n    const canvas = chart.canvas;\n    const container = canvas && _getParentNode(canvas);\n    if (!container) {\n        return;\n    }\n    const resize = throttled((width, height)=>{\n        const w = container.clientWidth;\n        listener(width, height);\n        if (w < container.clientWidth) {\n            listener();\n        }\n    }, window);\n    const observer = new ResizeObserver((entries)=>{\n        const entry = entries[0];\n        const width = entry.contentRect.width;\n        const height = entry.contentRect.height;\n        if (width === 0 && height === 0) {\n            return;\n        }\n        resize(width, height);\n    });\n    observer.observe(container);\n    listenDevicePixelRatioChanges(chart, resize);\n    return observer;\n}\nfunction releaseObserver(chart, type, observer) {\n    if (observer) {\n        observer.disconnect();\n    }\n    if (type === 'resize') {\n        unlistenDevicePixelRatioChanges(chart);\n    }\n}\nfunction createProxyAndListen(chart, type, listener) {\n    const canvas = chart.canvas;\n    const proxy = throttled((event)=>{\n        if (chart.ctx !== null) {\n            listener(fromNativeEvent(event, chart));\n        }\n    }, chart);\n    addListener(canvas, type, proxy);\n    return proxy;\n}\n class DomPlatform extends BasePlatform {\n acquireContext(canvas, aspectRatio) {\n        const context = canvas && canvas.getContext && canvas.getContext('2d');\n        if (context && context.canvas === canvas) {\n            initCanvas(canvas, aspectRatio);\n            return context;\n        }\n        return null;\n    }\n releaseContext(context) {\n        const canvas = context.canvas;\n        if (!canvas[EXPANDO_KEY]) {\n            return false;\n        }\n        const initial = canvas[EXPANDO_KEY].initial;\n        [\n            'height',\n            'width'\n        ].forEach((prop)=>{\n            const value = initial[prop];\n            if (isNullOrUndef(value)) {\n                canvas.removeAttribute(prop);\n            } else {\n                canvas.setAttribute(prop, value);\n            }\n        });\n        const style = initial.style || {};\n        Object.keys(style).forEach((key)=>{\n            canvas.style[key] = style[key];\n        });\n        canvas.width = canvas.width;\n        delete canvas[EXPANDO_KEY];\n        return true;\n    }\n addEventListener(chart, type, listener) {\n        this.removeEventListener(chart, type);\n        const proxies = chart.$proxies || (chart.$proxies = {});\n        const handlers = {\n            attach: createAttachObserver,\n            detach: createDetachObserver,\n            resize: createResizeObserver\n        };\n        const handler = handlers[type] || createProxyAndListen;\n        proxies[type] = handler(chart, type, listener);\n    }\n removeEventListener(chart, type) {\n        const proxies = chart.$proxies || (chart.$proxies = {});\n        const proxy = proxies[type];\n        if (!proxy) {\n            return;\n        }\n        const handlers = {\n            attach: releaseObserver,\n            detach: releaseObserver,\n            resize: releaseObserver\n        };\n        const handler = handlers[type] || removeListener;\n        handler(chart, type, proxy);\n        proxies[type] = undefined;\n    }\n    getDevicePixelRatio() {\n        return window.devicePixelRatio;\n    }\n getMaximumSize(canvas, width, height, aspectRatio) {\n        return getMaximumSize(canvas, width, height, aspectRatio);\n    }\n isAttached(canvas) {\n        const container = _getParentNode(canvas);\n        return !!(container && container.isConnected);\n    }\n}\n\nfunction _detectPlatform(canvas) {\n    if (!_isDomSupported() || typeof OffscreenCanvas !== 'undefined' && canvas instanceof OffscreenCanvas) {\n        return BasicPlatform;\n    }\n    return DomPlatform;\n}\n\nclass Element {\n    static defaults = {};\n    static defaultRoutes = undefined;\n    x;\n    y;\n    active = false;\n    options;\n    $animations;\n    tooltipPosition(useFinalPosition) {\n        const { x , y  } = this.getProps([\n            'x',\n            'y'\n        ], useFinalPosition);\n        return {\n            x,\n            y\n        };\n    }\n    hasValue() {\n        return isNumber(this.x) && isNumber(this.y);\n    }\n    getProps(props, final) {\n        const anims = this.$animations;\n        if (!final || !anims) {\n            // let's not create an object, if not needed\n            return this;\n        }\n        const ret = {};\n        props.forEach((prop)=>{\n            ret[prop] = anims[prop] && anims[prop].active() ? anims[prop]._to : this[prop];\n        });\n        return ret;\n    }\n}\n\nfunction autoSkip(scale, ticks) {\n    const tickOpts = scale.options.ticks;\n    const determinedMaxTicks = determineMaxTicks(scale);\n    const ticksLimit = Math.min(tickOpts.maxTicksLimit || determinedMaxTicks, determinedMaxTicks);\n    const majorIndices = tickOpts.major.enabled ? getMajorIndices(ticks) : [];\n    const numMajorIndices = majorIndices.length;\n    const first = majorIndices[0];\n    const last = majorIndices[numMajorIndices - 1];\n    const newTicks = [];\n    if (numMajorIndices > ticksLimit) {\n        skipMajors(ticks, newTicks, majorIndices, numMajorIndices / ticksLimit);\n        return newTicks;\n    }\n    const spacing = calculateSpacing(majorIndices, ticks, ticksLimit);\n    if (numMajorIndices > 0) {\n        let i, ilen;\n        const avgMajorSpacing = numMajorIndices > 1 ? Math.round((last - first) / (numMajorIndices - 1)) : null;\n        skip(ticks, newTicks, spacing, isNullOrUndef(avgMajorSpacing) ? 0 : first - avgMajorSpacing, first);\n        for(i = 0, ilen = numMajorIndices - 1; i < ilen; i++){\n            skip(ticks, newTicks, spacing, majorIndices[i], majorIndices[i + 1]);\n        }\n        skip(ticks, newTicks, spacing, last, isNullOrUndef(avgMajorSpacing) ? ticks.length : last + avgMajorSpacing);\n        return newTicks;\n    }\n    skip(ticks, newTicks, spacing);\n    return newTicks;\n}\nfunction determineMaxTicks(scale) {\n    const offset = scale.options.offset;\n    const tickLength = scale._tickSize();\n    const maxScale = scale._length / tickLength + (offset ? 0 : 1);\n    const maxChart = scale._maxLength / tickLength;\n    return Math.floor(Math.min(maxScale, maxChart));\n}\n function calculateSpacing(majorIndices, ticks, ticksLimit) {\n    const evenMajorSpacing = getEvenSpacing(majorIndices);\n    const spacing = ticks.length / ticksLimit;\n    if (!evenMajorSpacing) {\n        return Math.max(spacing, 1);\n    }\n    const factors = _factorize(evenMajorSpacing);\n    for(let i = 0, ilen = factors.length - 1; i < ilen; i++){\n        const factor = factors[i];\n        if (factor > spacing) {\n            return factor;\n        }\n    }\n    return Math.max(spacing, 1);\n}\n function getMajorIndices(ticks) {\n    const result = [];\n    let i, ilen;\n    for(i = 0, ilen = ticks.length; i < ilen; i++){\n        if (ticks[i].major) {\n            result.push(i);\n        }\n    }\n    return result;\n}\n function skipMajors(ticks, newTicks, majorIndices, spacing) {\n    let count = 0;\n    let next = majorIndices[0];\n    let i;\n    spacing = Math.ceil(spacing);\n    for(i = 0; i < ticks.length; i++){\n        if (i === next) {\n            newTicks.push(ticks[i]);\n            count++;\n            next = majorIndices[count * spacing];\n        }\n    }\n}\n function skip(ticks, newTicks, spacing, majorStart, majorEnd) {\n    const start = valueOrDefault(majorStart, 0);\n    const end = Math.min(valueOrDefault(majorEnd, ticks.length), ticks.length);\n    let count = 0;\n    let length, i, next;\n    spacing = Math.ceil(spacing);\n    if (majorEnd) {\n        length = majorEnd - majorStart;\n        spacing = length / Math.floor(length / spacing);\n    }\n    next = start;\n    while(next < 0){\n        count++;\n        next = Math.round(start + count * spacing);\n    }\n    for(i = Math.max(start, 0); i < end; i++){\n        if (i === next) {\n            newTicks.push(ticks[i]);\n            count++;\n            next = Math.round(start + count * spacing);\n        }\n    }\n}\n function getEvenSpacing(arr) {\n    const len = arr.length;\n    let i, diff;\n    if (len < 2) {\n        return false;\n    }\n    for(diff = arr[0], i = 1; i < len; ++i){\n        if (arr[i] - arr[i - 1] !== diff) {\n            return false;\n        }\n    }\n    return diff;\n}\n\nconst reverseAlign = (align)=>align === 'left' ? 'right' : align === 'right' ? 'left' : align;\nconst offsetFromEdge = (scale, edge, offset)=>edge === 'top' || edge === 'left' ? scale[edge] + offset : scale[edge] - offset;\nconst getTicksLimit = (ticksLength, maxTicksLimit)=>Math.min(maxTicksLimit || ticksLength, ticksLength);\n function sample(arr, numItems) {\n    const result = [];\n    const increment = arr.length / numItems;\n    const len = arr.length;\n    let i = 0;\n    for(; i < len; i += increment){\n        result.push(arr[Math.floor(i)]);\n    }\n    return result;\n}\n function getPixelForGridLine(scale, index, offsetGridLines) {\n    const length = scale.ticks.length;\n    const validIndex = Math.min(index, length - 1);\n    const start = scale._startPixel;\n    const end = scale._endPixel;\n    const epsilon = 1e-6;\n    let lineValue = scale.getPixelForTick(validIndex);\n    let offset;\n    if (offsetGridLines) {\n        if (length === 1) {\n            offset = Math.max(lineValue - start, end - lineValue);\n        } else if (index === 0) {\n            offset = (scale.getPixelForTick(1) - lineValue) / 2;\n        } else {\n            offset = (lineValue - scale.getPixelForTick(validIndex - 1)) / 2;\n        }\n        lineValue += validIndex < index ? offset : -offset;\n        if (lineValue < start - epsilon || lineValue > end + epsilon) {\n            return;\n        }\n    }\n    return lineValue;\n}\n function garbageCollect(caches, length) {\n    each(caches, (cache)=>{\n        const gc = cache.gc;\n        const gcLen = gc.length / 2;\n        let i;\n        if (gcLen > length) {\n            for(i = 0; i < gcLen; ++i){\n                delete cache.data[gc[i]];\n            }\n            gc.splice(0, gcLen);\n        }\n    });\n}\n function getTickMarkLength(options) {\n    return options.drawTicks ? options.tickLength : 0;\n}\n function getTitleHeight(options, fallback) {\n    if (!options.display) {\n        return 0;\n    }\n    const font = toFont(options.font, fallback);\n    const padding = toPadding(options.padding);\n    const lines = isArray(options.text) ? options.text.length : 1;\n    return lines * font.lineHeight + padding.height;\n}\nfunction createScaleContext(parent, scale) {\n    return createContext(parent, {\n        scale,\n        type: 'scale'\n    });\n}\nfunction createTickContext(parent, index, tick) {\n    return createContext(parent, {\n        tick,\n        index,\n        type: 'tick'\n    });\n}\nfunction titleAlign(align, position, reverse) {\n     let ret = _toLeftRightCenter(align);\n    if (reverse && position !== 'right' || !reverse && position === 'right') {\n        ret = reverseAlign(ret);\n    }\n    return ret;\n}\nfunction titleArgs(scale, offset, position, align) {\n    const { top , left , bottom , right , chart  } = scale;\n    const { chartArea , scales  } = chart;\n    let rotation = 0;\n    let maxWidth, titleX, titleY;\n    const height = bottom - top;\n    const width = right - left;\n    if (scale.isHorizontal()) {\n        titleX = _alignStartEnd(align, left, right);\n        if (isObject(position)) {\n            const positionAxisID = Object.keys(position)[0];\n            const value = position[positionAxisID];\n            titleY = scales[positionAxisID].getPixelForValue(value) + height - offset;\n        } else if (position === 'center') {\n            titleY = (chartArea.bottom + chartArea.top) / 2 + height - offset;\n        } else {\n            titleY = offsetFromEdge(scale, position, offset);\n        }\n        maxWidth = right - left;\n    } else {\n        if (isObject(position)) {\n            const positionAxisID = Object.keys(position)[0];\n            const value = position[positionAxisID];\n            titleX = scales[positionAxisID].getPixelForValue(value) - width + offset;\n        } else if (position === 'center') {\n            titleX = (chartArea.left + chartArea.right) / 2 - width + offset;\n        } else {\n            titleX = offsetFromEdge(scale, position, offset);\n        }\n        titleY = _alignStartEnd(align, bottom, top);\n        rotation = position === 'left' ? -HALF_PI : HALF_PI;\n    }\n    return {\n        titleX,\n        titleY,\n        maxWidth,\n        rotation\n    };\n}\nclass Scale extends Element {\n    constructor(cfg){\n        super();\n         this.id = cfg.id;\n         this.type = cfg.type;\n         this.options = undefined;\n         this.ctx = cfg.ctx;\n         this.chart = cfg.chart;\n         this.top = undefined;\n         this.bottom = undefined;\n         this.left = undefined;\n         this.right = undefined;\n         this.width = undefined;\n         this.height = undefined;\n        this._margins = {\n            left: 0,\n            right: 0,\n            top: 0,\n            bottom: 0\n        };\n         this.maxWidth = undefined;\n         this.maxHeight = undefined;\n         this.paddingTop = undefined;\n         this.paddingBottom = undefined;\n         this.paddingLeft = undefined;\n         this.paddingRight = undefined;\n         this.axis = undefined;\n         this.labelRotation = undefined;\n        this.min = undefined;\n        this.max = undefined;\n        this._range = undefined;\n         this.ticks = [];\n         this._gridLineItems = null;\n         this._labelItems = null;\n         this._labelSizes = null;\n        this._length = 0;\n        this._maxLength = 0;\n        this._longestTextCache = {};\n         this._startPixel = undefined;\n         this._endPixel = undefined;\n        this._reversePixels = false;\n        this._userMax = undefined;\n        this._userMin = undefined;\n        this._suggestedMax = undefined;\n        this._suggestedMin = undefined;\n        this._ticksLength = 0;\n        this._borderValue = 0;\n        this._cache = {};\n        this._dataLimitsCached = false;\n        this.$context = undefined;\n    }\n init(options) {\n        this.options = options.setContext(this.getContext());\n        this.axis = options.axis;\n        this._userMin = this.parse(options.min);\n        this._userMax = this.parse(options.max);\n        this._suggestedMin = this.parse(options.suggestedMin);\n        this._suggestedMax = this.parse(options.suggestedMax);\n    }\n parse(raw, index) {\n        return raw;\n    }\n getUserBounds() {\n        let { _userMin , _userMax , _suggestedMin , _suggestedMax  } = this;\n        _userMin = finiteOrDefault(_userMin, Number.POSITIVE_INFINITY);\n        _userMax = finiteOrDefault(_userMax, Number.NEGATIVE_INFINITY);\n        _suggestedMin = finiteOrDefault(_suggestedMin, Number.POSITIVE_INFINITY);\n        _suggestedMax = finiteOrDefault(_suggestedMax, Number.NEGATIVE_INFINITY);\n        return {\n            min: finiteOrDefault(_userMin, _suggestedMin),\n            max: finiteOrDefault(_userMax, _suggestedMax),\n            minDefined: isNumberFinite(_userMin),\n            maxDefined: isNumberFinite(_userMax)\n        };\n    }\n getMinMax(canStack) {\n        let { min , max , minDefined , maxDefined  } = this.getUserBounds();\n        let range;\n        if (minDefined && maxDefined) {\n            return {\n                min,\n                max\n            };\n        }\n        const metas = this.getMatchingVisibleMetas();\n        for(let i = 0, ilen = metas.length; i < ilen; ++i){\n            range = metas[i].controller.getMinMax(this, canStack);\n            if (!minDefined) {\n                min = Math.min(min, range.min);\n            }\n            if (!maxDefined) {\n                max = Math.max(max, range.max);\n            }\n        }\n        min = maxDefined && min > max ? max : min;\n        max = minDefined && min > max ? min : max;\n        return {\n            min: finiteOrDefault(min, finiteOrDefault(max, min)),\n            max: finiteOrDefault(max, finiteOrDefault(min, max))\n        };\n    }\n getPadding() {\n        return {\n            left: this.paddingLeft || 0,\n            top: this.paddingTop || 0,\n            right: this.paddingRight || 0,\n            bottom: this.paddingBottom || 0\n        };\n    }\n getTicks() {\n        return this.ticks;\n    }\n getLabels() {\n        const data = this.chart.data;\n        return this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels || [];\n    }\n getLabelItems(chartArea = this.chart.chartArea) {\n        const items = this._labelItems || (this._labelItems = this._computeLabelItems(chartArea));\n        return items;\n    }\n    beforeLayout() {\n        this._cache = {};\n        this._dataLimitsCached = false;\n    }\n    beforeUpdate() {\n        callback(this.options.beforeUpdate, [\n            this\n        ]);\n    }\n update(maxWidth, maxHeight, margins) {\n        const { beginAtZero , grace , ticks: tickOpts  } = this.options;\n        const sampleSize = tickOpts.sampleSize;\n        this.beforeUpdate();\n        this.maxWidth = maxWidth;\n        this.maxHeight = maxHeight;\n        this._margins = margins = Object.assign({\n            left: 0,\n            right: 0,\n            top: 0,\n            bottom: 0\n        }, margins);\n        this.ticks = null;\n        this._labelSizes = null;\n        this._gridLineItems = null;\n        this._labelItems = null;\n        this.beforeSetDimensions();\n        this.setDimensions();\n        this.afterSetDimensions();\n        this._maxLength = this.isHorizontal() ? this.width + margins.left + margins.right : this.height + margins.top + margins.bottom;\n        if (!this._dataLimitsCached) {\n            this.beforeDataLimits();\n            this.determineDataLimits();\n            this.afterDataLimits();\n            this._range = _addGrace(this, grace, beginAtZero);\n            this._dataLimitsCached = true;\n        }\n        this.beforeBuildTicks();\n        this.ticks = this.buildTicks() || [];\n        this.afterBuildTicks();\n        const samplingEnabled = sampleSize < this.ticks.length;\n        this._convertTicksToLabels(samplingEnabled ? sample(this.ticks, sampleSize) : this.ticks);\n        this.configure();\n        this.beforeCalculateLabelRotation();\n        this.calculateLabelRotation();\n        this.afterCalculateLabelRotation();\n        if (tickOpts.display && (tickOpts.autoSkip || tickOpts.source === 'auto')) {\n            this.ticks = autoSkip(this, this.ticks);\n            this._labelSizes = null;\n            this.afterAutoSkip();\n        }\n        if (samplingEnabled) {\n            this._convertTicksToLabels(this.ticks);\n        }\n        this.beforeFit();\n        this.fit();\n        this.afterFit();\n        this.afterUpdate();\n    }\n configure() {\n        let reversePixels = this.options.reverse;\n        let startPixel, endPixel;\n        if (this.isHorizontal()) {\n            startPixel = this.left;\n            endPixel = this.right;\n        } else {\n            startPixel = this.top;\n            endPixel = this.bottom;\n            reversePixels = !reversePixels;\n        }\n        this._startPixel = startPixel;\n        this._endPixel = endPixel;\n        this._reversePixels = reversePixels;\n        this._length = endPixel - startPixel;\n        this._alignToPixels = this.options.alignToPixels;\n    }\n    afterUpdate() {\n        callback(this.options.afterUpdate, [\n            this\n        ]);\n    }\n    beforeSetDimensions() {\n        callback(this.options.beforeSetDimensions, [\n            this\n        ]);\n    }\n    setDimensions() {\n        if (this.isHorizontal()) {\n            this.width = this.maxWidth;\n            this.left = 0;\n            this.right = this.width;\n        } else {\n            this.height = this.maxHeight;\n            this.top = 0;\n            this.bottom = this.height;\n        }\n        this.paddingLeft = 0;\n        this.paddingTop = 0;\n        this.paddingRight = 0;\n        this.paddingBottom = 0;\n    }\n    afterSetDimensions() {\n        callback(this.options.afterSetDimensions, [\n            this\n        ]);\n    }\n    _callHooks(name) {\n        this.chart.notifyPlugins(name, this.getContext());\n        callback(this.options[name], [\n            this\n        ]);\n    }\n    beforeDataLimits() {\n        this._callHooks('beforeDataLimits');\n    }\n    determineDataLimits() {}\n    afterDataLimits() {\n        this._callHooks('afterDataLimits');\n    }\n    beforeBuildTicks() {\n        this._callHooks('beforeBuildTicks');\n    }\n buildTicks() {\n        return [];\n    }\n    afterBuildTicks() {\n        this._callHooks('afterBuildTicks');\n    }\n    beforeTickToLabelConversion() {\n        callback(this.options.beforeTickToLabelConversion, [\n            this\n        ]);\n    }\n generateTickLabels(ticks) {\n        const tickOpts = this.options.ticks;\n        let i, ilen, tick;\n        for(i = 0, ilen = ticks.length; i < ilen; i++){\n            tick = ticks[i];\n            tick.label = callback(tickOpts.callback, [\n                tick.value,\n                i,\n                ticks\n            ], this);\n        }\n    }\n    afterTickToLabelConversion() {\n        callback(this.options.afterTickToLabelConversion, [\n            this\n        ]);\n    }\n    beforeCalculateLabelRotation() {\n        callback(this.options.beforeCalculateLabelRotation, [\n            this\n        ]);\n    }\n    calculateLabelRotation() {\n        const options = this.options;\n        const tickOpts = options.ticks;\n        const numTicks = getTicksLimit(this.ticks.length, options.ticks.maxTicksLimit);\n        const minRotation = tickOpts.minRotation || 0;\n        const maxRotation = tickOpts.maxRotation;\n        let labelRotation = minRotation;\n        let tickWidth, maxHeight, maxLabelDiagonal;\n        if (!this._isVisible() || !tickOpts.display || minRotation >= maxRotation || numTicks <= 1 || !this.isHorizontal()) {\n            this.labelRotation = minRotation;\n            return;\n        }\n        const labelSizes = this._getLabelSizes();\n        const maxLabelWidth = labelSizes.widest.width;\n        const maxLabelHeight = labelSizes.highest.height;\n        const maxWidth = _limitValue(this.chart.width - maxLabelWidth, 0, this.maxWidth);\n        tickWidth = options.offset ? this.maxWidth / numTicks : maxWidth / (numTicks - 1);\n        if (maxLabelWidth + 6 > tickWidth) {\n            tickWidth = maxWidth / (numTicks - (options.offset ? 0.5 : 1));\n            maxHeight = this.maxHeight - getTickMarkLength(options.grid) - tickOpts.padding - getTitleHeight(options.title, this.chart.options.font);\n            maxLabelDiagonal = Math.sqrt(maxLabelWidth * maxLabelWidth + maxLabelHeight * maxLabelHeight);\n            labelRotation = toDegrees(Math.min(Math.asin(_limitValue((labelSizes.highest.height + 6) / tickWidth, -1, 1)), Math.asin(_limitValue(maxHeight / maxLabelDiagonal, -1, 1)) - Math.asin(_limitValue(maxLabelHeight / maxLabelDiagonal, -1, 1))));\n            labelRotation = Math.max(minRotation, Math.min(maxRotation, labelRotation));\n        }\n        this.labelRotation = labelRotation;\n    }\n    afterCalculateLabelRotation() {\n        callback(this.options.afterCalculateLabelRotation, [\n            this\n        ]);\n    }\n    afterAutoSkip() {}\n    beforeFit() {\n        callback(this.options.beforeFit, [\n            this\n        ]);\n    }\n    fit() {\n        const minSize = {\n            width: 0,\n            height: 0\n        };\n        const { chart , options: { ticks: tickOpts , title: titleOpts , grid: gridOpts  }  } = this;\n        const display = this._isVisible();\n        const isHorizontal = this.isHorizontal();\n        if (display) {\n            const titleHeight = getTitleHeight(titleOpts, chart.options.font);\n            if (isHorizontal) {\n                minSize.width = this.maxWidth;\n                minSize.height = getTickMarkLength(gridOpts) + titleHeight;\n            } else {\n                minSize.height = this.maxHeight;\n                minSize.width = getTickMarkLength(gridOpts) + titleHeight;\n            }\n            if (tickOpts.display && this.ticks.length) {\n                const { first , last , widest , highest  } = this._getLabelSizes();\n                const tickPadding = tickOpts.padding * 2;\n                const angleRadians = toRadians(this.labelRotation);\n                const cos = Math.cos(angleRadians);\n                const sin = Math.sin(angleRadians);\n                if (isHorizontal) {\n                    const labelHeight = tickOpts.mirror ? 0 : sin * widest.width + cos * highest.height;\n                    minSize.height = Math.min(this.maxHeight, minSize.height + labelHeight + tickPadding);\n                } else {\n                    const labelWidth = tickOpts.mirror ? 0 : cos * widest.width + sin * highest.height;\n                    minSize.width = Math.min(this.maxWidth, minSize.width + labelWidth + tickPadding);\n                }\n                this._calculatePadding(first, last, sin, cos);\n            }\n        }\n        this._handleMargins();\n        if (isHorizontal) {\n            this.width = this._length = chart.width - this._margins.left - this._margins.right;\n            this.height = minSize.height;\n        } else {\n            this.width = minSize.width;\n            this.height = this._length = chart.height - this._margins.top - this._margins.bottom;\n        }\n    }\n    _calculatePadding(first, last, sin, cos) {\n        const { ticks: { align , padding  } , position  } = this.options;\n        const isRotated = this.labelRotation !== 0;\n        const labelsBelowTicks = position !== 'top' && this.axis === 'x';\n        if (this.isHorizontal()) {\n            const offsetLeft = this.getPixelForTick(0) - this.left;\n            const offsetRight = this.right - this.getPixelForTick(this.ticks.length - 1);\n            let paddingLeft = 0;\n            let paddingRight = 0;\n            if (isRotated) {\n                if (labelsBelowTicks) {\n                    paddingLeft = cos * first.width;\n                    paddingRight = sin * last.height;\n                } else {\n                    paddingLeft = sin * first.height;\n                    paddingRight = cos * last.width;\n                }\n            } else if (align === 'start') {\n                paddingRight = last.width;\n            } else if (align === 'end') {\n                paddingLeft = first.width;\n            } else if (align !== 'inner') {\n                paddingLeft = first.width / 2;\n                paddingRight = last.width / 2;\n            }\n            this.paddingLeft = Math.max((paddingLeft - offsetLeft + padding) * this.width / (this.width - offsetLeft), 0);\n            this.paddingRight = Math.max((paddingRight - offsetRight + padding) * this.width / (this.width - offsetRight), 0);\n        } else {\n            let paddingTop = last.height / 2;\n            let paddingBottom = first.height / 2;\n            if (align === 'start') {\n                paddingTop = 0;\n                paddingBottom = first.height;\n            } else if (align === 'end') {\n                paddingTop = last.height;\n                paddingBottom = 0;\n            }\n            this.paddingTop = paddingTop + padding;\n            this.paddingBottom = paddingBottom + padding;\n        }\n    }\n _handleMargins() {\n        if (this._margins) {\n            this._margins.left = Math.max(this.paddingLeft, this._margins.left);\n            this._margins.top = Math.max(this.paddingTop, this._margins.top);\n            this._margins.right = Math.max(this.paddingRight, this._margins.right);\n            this._margins.bottom = Math.max(this.paddingBottom, this._margins.bottom);\n        }\n    }\n    afterFit() {\n        callback(this.options.afterFit, [\n            this\n        ]);\n    }\n isHorizontal() {\n        const { axis , position  } = this.options;\n        return position === 'top' || position === 'bottom' || axis === 'x';\n    }\n isFullSize() {\n        return this.options.fullSize;\n    }\n _convertTicksToLabels(ticks) {\n        this.beforeTickToLabelConversion();\n        this.generateTickLabels(ticks);\n        let i, ilen;\n        for(i = 0, ilen = ticks.length; i < ilen; i++){\n            if (isNullOrUndef(ticks[i].label)) {\n                ticks.splice(i, 1);\n                ilen--;\n                i--;\n            }\n        }\n        this.afterTickToLabelConversion();\n    }\n _getLabelSizes() {\n        let labelSizes = this._labelSizes;\n        if (!labelSizes) {\n            const sampleSize = this.options.ticks.sampleSize;\n            let ticks = this.ticks;\n            if (sampleSize < ticks.length) {\n                ticks = sample(ticks, sampleSize);\n            }\n            this._labelSizes = labelSizes = this._computeLabelSizes(ticks, ticks.length, this.options.ticks.maxTicksLimit);\n        }\n        return labelSizes;\n    }\n _computeLabelSizes(ticks, length, maxTicksLimit) {\n        const { ctx , _longestTextCache: caches  } = this;\n        const widths = [];\n        const heights = [];\n        const increment = Math.floor(length / getTicksLimit(length, maxTicksLimit));\n        let widestLabelSize = 0;\n        let highestLabelSize = 0;\n        let i, j, jlen, label, tickFont, fontString, cache, lineHeight, width, height, nestedLabel;\n        for(i = 0; i < length; i += increment){\n            label = ticks[i].label;\n            tickFont = this._resolveTickFontOptions(i);\n            ctx.font = fontString = tickFont.string;\n            cache = caches[fontString] = caches[fontString] || {\n                data: {},\n                gc: []\n            };\n            lineHeight = tickFont.lineHeight;\n            width = height = 0;\n            if (!isNullOrUndef(label) && !isArray(label)) {\n                width = _measureText(ctx, cache.data, cache.gc, width, label);\n                height = lineHeight;\n            } else if (isArray(label)) {\n                for(j = 0, jlen = label.length; j < jlen; ++j){\n                    nestedLabel =  label[j];\n                    if (!isNullOrUndef(nestedLabel) && !isArray(nestedLabel)) {\n                        width = _measureText(ctx, cache.data, cache.gc, width, nestedLabel);\n                        height += lineHeight;\n                    }\n                }\n            }\n            widths.push(width);\n            heights.push(height);\n            widestLabelSize = Math.max(width, widestLabelSize);\n            highestLabelSize = Math.max(height, highestLabelSize);\n        }\n        garbageCollect(caches, length);\n        const widest = widths.indexOf(widestLabelSize);\n        const highest = heights.indexOf(highestLabelSize);\n        const valueAt = (idx)=>({\n                width: widths[idx] || 0,\n                height: heights[idx] || 0\n            });\n        return {\n            first: valueAt(0),\n            last: valueAt(length - 1),\n            widest: valueAt(widest),\n            highest: valueAt(highest),\n            widths,\n            heights\n        };\n    }\n getLabelForValue(value) {\n        return value;\n    }\n getPixelForValue(value, index) {\n        return NaN;\n    }\n getValueForPixel(pixel) {}\n getPixelForTick(index) {\n        const ticks = this.ticks;\n        if (index < 0 || index > ticks.length - 1) {\n            return null;\n        }\n        return this.getPixelForValue(ticks[index].value);\n    }\n getPixelForDecimal(decimal) {\n        if (this._reversePixels) {\n            decimal = 1 - decimal;\n        }\n        const pixel = this._startPixel + decimal * this._length;\n        return _int16Range(this._alignToPixels ? _alignPixel(this.chart, pixel, 0) : pixel);\n    }\n getDecimalForPixel(pixel) {\n        const decimal = (pixel - this._startPixel) / this._length;\n        return this._reversePixels ? 1 - decimal : decimal;\n    }\n getBasePixel() {\n        return this.getPixelForValue(this.getBaseValue());\n    }\n getBaseValue() {\n        const { min , max  } = this;\n        return min < 0 && max < 0 ? max : min > 0 && max > 0 ? min : 0;\n    }\n getContext(index) {\n        const ticks = this.ticks || [];\n        if (index >= 0 && index < ticks.length) {\n            const tick = ticks[index];\n            return tick.$context || (tick.$context = createTickContext(this.getContext(), index, tick));\n        }\n        return this.$context || (this.$context = createScaleContext(this.chart.getContext(), this));\n    }\n _tickSize() {\n        const optionTicks = this.options.ticks;\n        const rot = toRadians(this.labelRotation);\n        const cos = Math.abs(Math.cos(rot));\n        const sin = Math.abs(Math.sin(rot));\n        const labelSizes = this._getLabelSizes();\n        const padding = optionTicks.autoSkipPadding || 0;\n        const w = labelSizes ? labelSizes.widest.width + padding : 0;\n        const h = labelSizes ? labelSizes.highest.height + padding : 0;\n        return this.isHorizontal() ? h * cos > w * sin ? w / cos : h / sin : h * sin < w * cos ? h / cos : w / sin;\n    }\n _isVisible() {\n        const display = this.options.display;\n        if (display !== 'auto') {\n            return !!display;\n        }\n        return this.getMatchingVisibleMetas().length > 0;\n    }\n _computeGridLineItems(chartArea) {\n        const axis = this.axis;\n        const chart = this.chart;\n        const options = this.options;\n        const { grid , position , border  } = options;\n        const offset = grid.offset;\n        const isHorizontal = this.isHorizontal();\n        const ticks = this.ticks;\n        const ticksLength = ticks.length + (offset ? 1 : 0);\n        const tl = getTickMarkLength(grid);\n        const items = [];\n        const borderOpts = border.setContext(this.getContext());\n        const axisWidth = borderOpts.display ? borderOpts.width : 0;\n        const axisHalfWidth = axisWidth / 2;\n        const alignBorderValue = function(pixel) {\n            return _alignPixel(chart, pixel, axisWidth);\n        };\n        let borderValue, i, lineValue, alignedLineValue;\n        let tx1, ty1, tx2, ty2, x1, y1, x2, y2;\n        if (position === 'top') {\n            borderValue = alignBorderValue(this.bottom);\n            ty1 = this.bottom - tl;\n            ty2 = borderValue - axisHalfWidth;\n            y1 = alignBorderValue(chartArea.top) + axisHalfWidth;\n            y2 = chartArea.bottom;\n        } else if (position === 'bottom') {\n            borderValue = alignBorderValue(this.top);\n            y1 = chartArea.top;\n            y2 = alignBorderValue(chartArea.bottom) - axisHalfWidth;\n            ty1 = borderValue + axisHalfWidth;\n            ty2 = this.top + tl;\n        } else if (position === 'left') {\n            borderValue = alignBorderValue(this.right);\n            tx1 = this.right - tl;\n            tx2 = borderValue - axisHalfWidth;\n            x1 = alignBorderValue(chartArea.left) + axisHalfWidth;\n            x2 = chartArea.right;\n        } else if (position === 'right') {\n            borderValue = alignBorderValue(this.left);\n            x1 = chartArea.left;\n            x2 = alignBorderValue(chartArea.right) - axisHalfWidth;\n            tx1 = borderValue + axisHalfWidth;\n            tx2 = this.left + tl;\n        } else if (axis === 'x') {\n            if (position === 'center') {\n                borderValue = alignBorderValue((chartArea.top + chartArea.bottom) / 2 + 0.5);\n            } else if (isObject(position)) {\n                const positionAxisID = Object.keys(position)[0];\n                const value = position[positionAxisID];\n                borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));\n            }\n            y1 = chartArea.top;\n            y2 = chartArea.bottom;\n            ty1 = borderValue + axisHalfWidth;\n            ty2 = ty1 + tl;\n        } else if (axis === 'y') {\n            if (position === 'center') {\n                borderValue = alignBorderValue((chartArea.left + chartArea.right) / 2);\n            } else if (isObject(position)) {\n                const positionAxisID = Object.keys(position)[0];\n                const value = position[positionAxisID];\n                borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));\n            }\n            tx1 = borderValue - axisHalfWidth;\n            tx2 = tx1 - tl;\n            x1 = chartArea.left;\n            x2 = chartArea.right;\n        }\n        const limit = valueOrDefault(options.ticks.maxTicksLimit, ticksLength);\n        const step = Math.max(1, Math.ceil(ticksLength / limit));\n        for(i = 0; i < ticksLength; i += step){\n            const context = this.getContext(i);\n            const optsAtIndex = grid.setContext(context);\n            const optsAtIndexBorder = border.setContext(context);\n            const lineWidth = optsAtIndex.lineWidth;\n            const lineColor = optsAtIndex.color;\n            const borderDash = optsAtIndexBorder.dash || [];\n            const borderDashOffset = optsAtIndexBorder.dashOffset;\n            const tickWidth = optsAtIndex.tickWidth;\n            const tickColor = optsAtIndex.tickColor;\n            const tickBorderDash = optsAtIndex.tickBorderDash || [];\n            const tickBorderDashOffset = optsAtIndex.tickBorderDashOffset;\n            lineValue = getPixelForGridLine(this, i, offset);\n            if (lineValue === undefined) {\n                continue;\n            }\n            alignedLineValue = _alignPixel(chart, lineValue, lineWidth);\n            if (isHorizontal) {\n                tx1 = tx2 = x1 = x2 = alignedLineValue;\n            } else {\n                ty1 = ty2 = y1 = y2 = alignedLineValue;\n            }\n            items.push({\n                tx1,\n                ty1,\n                tx2,\n                ty2,\n                x1,\n                y1,\n                x2,\n                y2,\n                width: lineWidth,\n                color: lineColor,\n                borderDash,\n                borderDashOffset,\n                tickWidth,\n                tickColor,\n                tickBorderDash,\n                tickBorderDashOffset\n            });\n        }\n        this._ticksLength = ticksLength;\n        this._borderValue = borderValue;\n        return items;\n    }\n _computeLabelItems(chartArea) {\n        const axis = this.axis;\n        const options = this.options;\n        const { position , ticks: optionTicks  } = options;\n        const isHorizontal = this.isHorizontal();\n        const ticks = this.ticks;\n        const { align , crossAlign , padding , mirror  } = optionTicks;\n        const tl = getTickMarkLength(options.grid);\n        const tickAndPadding = tl + padding;\n        const hTickAndPadding = mirror ? -padding : tickAndPadding;\n        const rotation = -toRadians(this.labelRotation);\n        const items = [];\n        let i, ilen, tick, label, x, y, textAlign, pixel, font, lineHeight, lineCount, textOffset;\n        let textBaseline = 'middle';\n        if (position === 'top') {\n            y = this.bottom - hTickAndPadding;\n            textAlign = this._getXAxisLabelAlignment();\n        } else if (position === 'bottom') {\n            y = this.top + hTickAndPadding;\n            textAlign = this._getXAxisLabelAlignment();\n        } else if (position === 'left') {\n            const ret = this._getYAxisLabelAlignment(tl);\n            textAlign = ret.textAlign;\n            x = ret.x;\n        } else if (position === 'right') {\n            const ret = this._getYAxisLabelAlignment(tl);\n            textAlign = ret.textAlign;\n            x = ret.x;\n        } else if (axis === 'x') {\n            if (position === 'center') {\n                y = (chartArea.top + chartArea.bottom) / 2 + tickAndPadding;\n            } else if (isObject(position)) {\n                const positionAxisID = Object.keys(position)[0];\n                const value = position[positionAxisID];\n                y = this.chart.scales[positionAxisID].getPixelForValue(value) + tickAndPadding;\n            }\n            textAlign = this._getXAxisLabelAlignment();\n        } else if (axis === 'y') {\n            if (position === 'center') {\n                x = (chartArea.left + chartArea.right) / 2 - tickAndPadding;\n            } else if (isObject(position)) {\n                const positionAxisID = Object.keys(position)[0];\n                const value = position[positionAxisID];\n                x = this.chart.scales[positionAxisID].getPixelForValue(value);\n            }\n            textAlign = this._getYAxisLabelAlignment(tl).textAlign;\n        }\n        if (axis === 'y') {\n            if (align === 'start') {\n                textBaseline = 'top';\n            } else if (align === 'end') {\n                textBaseline = 'bottom';\n            }\n        }\n        const labelSizes = this._getLabelSizes();\n        for(i = 0, ilen = ticks.length; i < ilen; ++i){\n            tick = ticks[i];\n            label = tick.label;\n            const optsAtIndex = optionTicks.setContext(this.getContext(i));\n            pixel = this.getPixelForTick(i) + optionTicks.labelOffset;\n            font = this._resolveTickFontOptions(i);\n            lineHeight = font.lineHeight;\n            lineCount = isArray(label) ? label.length : 1;\n            const halfCount = lineCount / 2;\n            const color = optsAtIndex.color;\n            const strokeColor = optsAtIndex.textStrokeColor;\n            const strokeWidth = optsAtIndex.textStrokeWidth;\n            let tickTextAlign = textAlign;\n            if (isHorizontal) {\n                x = pixel;\n                if (textAlign === 'inner') {\n                    if (i === ilen - 1) {\n                        tickTextAlign = !this.options.reverse ? 'right' : 'left';\n                    } else if (i === 0) {\n                        tickTextAlign = !this.options.reverse ? 'left' : 'right';\n                    } else {\n                        tickTextAlign = 'center';\n                    }\n                }\n                if (position === 'top') {\n                    if (crossAlign === 'near' || rotation !== 0) {\n                        textOffset = -lineCount * lineHeight + lineHeight / 2;\n                    } else if (crossAlign === 'center') {\n                        textOffset = -labelSizes.highest.height / 2 - halfCount * lineHeight + lineHeight;\n                    } else {\n                        textOffset = -labelSizes.highest.height + lineHeight / 2;\n                    }\n                } else {\n                    if (crossAlign === 'near' || rotation !== 0) {\n                        textOffset = lineHeight / 2;\n                    } else if (crossAlign === 'center') {\n                        textOffset = labelSizes.highest.height / 2 - halfCount * lineHeight;\n                    } else {\n                        textOffset = labelSizes.highest.height - lineCount * lineHeight;\n                    }\n                }\n                if (mirror) {\n                    textOffset *= -1;\n                }\n                if (rotation !== 0 && !optsAtIndex.showLabelBackdrop) {\n                    x += lineHeight / 2 * Math.sin(rotation);\n                }\n            } else {\n                y = pixel;\n                textOffset = (1 - lineCount) * lineHeight / 2;\n            }\n            let backdrop;\n            if (optsAtIndex.showLabelBackdrop) {\n                const labelPadding = toPadding(optsAtIndex.backdropPadding);\n                const height = labelSizes.heights[i];\n                const width = labelSizes.widths[i];\n                let top = textOffset - labelPadding.top;\n                let left = 0 - labelPadding.left;\n                switch(textBaseline){\n                    case 'middle':\n                        top -= height / 2;\n                        break;\n                    case 'bottom':\n                        top -= height;\n                        break;\n                }\n                switch(textAlign){\n                    case 'center':\n                        left -= width / 2;\n                        break;\n                    case 'right':\n                        left -= width;\n                        break;\n                    case 'inner':\n                        if (i === ilen - 1) {\n                            left -= width;\n                        } else if (i > 0) {\n                            left -= width / 2;\n                        }\n                        break;\n                }\n                backdrop = {\n                    left,\n                    top,\n                    width: width + labelPadding.width,\n                    height: height + labelPadding.height,\n                    color: optsAtIndex.backdropColor\n                };\n            }\n            items.push({\n                label,\n                font,\n                textOffset,\n                options: {\n                    rotation,\n                    color,\n                    strokeColor,\n                    strokeWidth,\n                    textAlign: tickTextAlign,\n                    textBaseline,\n                    translation: [\n                        x,\n                        y\n                    ],\n                    backdrop\n                }\n            });\n        }\n        return items;\n    }\n    _getXAxisLabelAlignment() {\n        const { position , ticks  } = this.options;\n        const rotation = -toRadians(this.labelRotation);\n        if (rotation) {\n            return position === 'top' ? 'left' : 'right';\n        }\n        let align = 'center';\n        if (ticks.align === 'start') {\n            align = 'left';\n        } else if (ticks.align === 'end') {\n            align = 'right';\n        } else if (ticks.align === 'inner') {\n            align = 'inner';\n        }\n        return align;\n    }\n    _getYAxisLabelAlignment(tl) {\n        const { position , ticks: { crossAlign , mirror , padding  }  } = this.options;\n        const labelSizes = this._getLabelSizes();\n        const tickAndPadding = tl + padding;\n        const widest = labelSizes.widest.width;\n        let textAlign;\n        let x;\n        if (position === 'left') {\n            if (mirror) {\n                x = this.right + padding;\n                if (crossAlign === 'near') {\n                    textAlign = 'left';\n                } else if (crossAlign === 'center') {\n                    textAlign = 'center';\n                    x += widest / 2;\n                } else {\n                    textAlign = 'right';\n                    x += widest;\n                }\n            } else {\n                x = this.right - tickAndPadding;\n                if (crossAlign === 'near') {\n                    textAlign = 'right';\n                } else if (crossAlign === 'center') {\n                    textAlign = 'center';\n                    x -= widest / 2;\n                } else {\n                    textAlign = 'left';\n                    x = this.left;\n                }\n            }\n        } else if (position === 'right') {\n            if (mirror) {\n                x = this.left + padding;\n                if (crossAlign === 'near') {\n                    textAlign = 'right';\n                } else if (crossAlign === 'center') {\n                    textAlign = 'center';\n                    x -= widest / 2;\n                } else {\n                    textAlign = 'left';\n                    x -= widest;\n                }\n            } else {\n                x = this.left + tickAndPadding;\n                if (crossAlign === 'near') {\n                    textAlign = 'left';\n                } else if (crossAlign === 'center') {\n                    textAlign = 'center';\n                    x += widest / 2;\n                } else {\n                    textAlign = 'right';\n                    x = this.right;\n                }\n            }\n        } else {\n            textAlign = 'right';\n        }\n        return {\n            textAlign,\n            x\n        };\n    }\n _computeLabelArea() {\n        if (this.options.ticks.mirror) {\n            return;\n        }\n        const chart = this.chart;\n        const position = this.options.position;\n        if (position === 'left' || position === 'right') {\n            return {\n                top: 0,\n                left: this.left,\n                bottom: chart.height,\n                right: this.right\n            };\n        }\n        if (position === 'top' || position === 'bottom') {\n            return {\n                top: this.top,\n                left: 0,\n                bottom: this.bottom,\n                right: chart.width\n            };\n        }\n    }\n drawBackground() {\n        const { ctx , options: { backgroundColor  } , left , top , width , height  } = this;\n        if (backgroundColor) {\n            ctx.save();\n            ctx.fillStyle = backgroundColor;\n            ctx.fillRect(left, top, width, height);\n            ctx.restore();\n        }\n    }\n    getLineWidthForValue(value) {\n        const grid = this.options.grid;\n        if (!this._isVisible() || !grid.display) {\n            return 0;\n        }\n        const ticks = this.ticks;\n        const index = ticks.findIndex((t)=>t.value === value);\n        if (index >= 0) {\n            const opts = grid.setContext(this.getContext(index));\n            return opts.lineWidth;\n        }\n        return 0;\n    }\n drawGrid(chartArea) {\n        const grid = this.options.grid;\n        const ctx = this.ctx;\n        const items = this._gridLineItems || (this._gridLineItems = this._computeGridLineItems(chartArea));\n        let i, ilen;\n        const drawLine = (p1, p2, style)=>{\n            if (!style.width || !style.color) {\n                return;\n            }\n            ctx.save();\n            ctx.lineWidth = style.width;\n            ctx.strokeStyle = style.color;\n            ctx.setLineDash(style.borderDash || []);\n            ctx.lineDashOffset = style.borderDashOffset;\n            ctx.beginPath();\n            ctx.moveTo(p1.x, p1.y);\n            ctx.lineTo(p2.x, p2.y);\n            ctx.stroke();\n            ctx.restore();\n        };\n        if (grid.display) {\n            for(i = 0, ilen = items.length; i < ilen; ++i){\n                const item = items[i];\n                if (grid.drawOnChartArea) {\n                    drawLine({\n                        x: item.x1,\n                        y: item.y1\n                    }, {\n                        x: item.x2,\n                        y: item.y2\n                    }, item);\n                }\n                if (grid.drawTicks) {\n                    drawLine({\n                        x: item.tx1,\n                        y: item.ty1\n                    }, {\n                        x: item.tx2,\n                        y: item.ty2\n                    }, {\n                        color: item.tickColor,\n                        width: item.tickWidth,\n                        borderDash: item.tickBorderDash,\n                        borderDashOffset: item.tickBorderDashOffset\n                    });\n                }\n            }\n        }\n    }\n drawBorder() {\n        const { chart , ctx , options: { border , grid  }  } = this;\n        const borderOpts = border.setContext(this.getContext());\n        const axisWidth = border.display ? borderOpts.width : 0;\n        if (!axisWidth) {\n            return;\n        }\n        const lastLineWidth = grid.setContext(this.getContext(0)).lineWidth;\n        const borderValue = this._borderValue;\n        let x1, x2, y1, y2;\n        if (this.isHorizontal()) {\n            x1 = _alignPixel(chart, this.left, axisWidth) - axisWidth / 2;\n            x2 = _alignPixel(chart, this.right, lastLineWidth) + lastLineWidth / 2;\n            y1 = y2 = borderValue;\n        } else {\n            y1 = _alignPixel(chart, this.top, axisWidth) - axisWidth / 2;\n            y2 = _alignPixel(chart, this.bottom, lastLineWidth) + lastLineWidth / 2;\n            x1 = x2 = borderValue;\n        }\n        ctx.save();\n        ctx.lineWidth = borderOpts.width;\n        ctx.strokeStyle = borderOpts.color;\n        ctx.beginPath();\n        ctx.moveTo(x1, y1);\n        ctx.lineTo(x2, y2);\n        ctx.stroke();\n        ctx.restore();\n    }\n drawLabels(chartArea) {\n        const optionTicks = this.options.ticks;\n        if (!optionTicks.display) {\n            return;\n        }\n        const ctx = this.ctx;\n        const area = this._computeLabelArea();\n        if (area) {\n            clipArea(ctx, area);\n        }\n        const items = this.getLabelItems(chartArea);\n        for (const item of items){\n            const renderTextOptions = item.options;\n            const tickFont = item.font;\n            const label = item.label;\n            const y = item.textOffset;\n            renderText(ctx, label, 0, y, tickFont, renderTextOptions);\n        }\n        if (area) {\n            unclipArea(ctx);\n        }\n    }\n drawTitle() {\n        const { ctx , options: { position , title , reverse  }  } = this;\n        if (!title.display) {\n            return;\n        }\n        const font = toFont(title.font);\n        const padding = toPadding(title.padding);\n        const align = title.align;\n        let offset = font.lineHeight / 2;\n        if (position === 'bottom' || position === 'center' || isObject(position)) {\n            offset += padding.bottom;\n            if (isArray(title.text)) {\n                offset += font.lineHeight * (title.text.length - 1);\n            }\n        } else {\n            offset += padding.top;\n        }\n        const { titleX , titleY , maxWidth , rotation  } = titleArgs(this, offset, position, align);\n        renderText(ctx, title.text, 0, 0, font, {\n            color: title.color,\n            maxWidth,\n            rotation,\n            textAlign: titleAlign(align, position, reverse),\n            textBaseline: 'middle',\n            translation: [\n                titleX,\n                titleY\n            ]\n        });\n    }\n    draw(chartArea) {\n        if (!this._isVisible()) {\n            return;\n        }\n        this.drawBackground();\n        this.drawGrid(chartArea);\n        this.drawBorder();\n        this.drawTitle();\n        this.drawLabels(chartArea);\n    }\n _layers() {\n        const opts = this.options;\n        const tz = opts.ticks && opts.ticks.z || 0;\n        const gz = valueOrDefault(opts.grid && opts.grid.z, -1);\n        const bz = valueOrDefault(opts.border && opts.border.z, 0);\n        if (!this._isVisible() || this.draw !== Scale.prototype.draw) {\n            return [\n                {\n                    z: tz,\n                    draw: (chartArea)=>{\n                        this.draw(chartArea);\n                    }\n                }\n            ];\n        }\n        return [\n            {\n                z: gz,\n                draw: (chartArea)=>{\n                    this.drawBackground();\n                    this.drawGrid(chartArea);\n                    this.drawTitle();\n                }\n            },\n            {\n                z: bz,\n                draw: ()=>{\n                    this.drawBorder();\n                }\n            },\n            {\n                z: tz,\n                draw: (chartArea)=>{\n                    this.drawLabels(chartArea);\n                }\n            }\n        ];\n    }\n getMatchingVisibleMetas(type) {\n        const metas = this.chart.getSortedVisibleDatasetMetas();\n        const axisID = this.axis + 'AxisID';\n        const result = [];\n        let i, ilen;\n        for(i = 0, ilen = metas.length; i < ilen; ++i){\n            const meta = metas[i];\n            if (meta[axisID] === this.id && (!type || meta.type === type)) {\n                result.push(meta);\n            }\n        }\n        return result;\n    }\n _resolveTickFontOptions(index) {\n        const opts = this.options.ticks.setContext(this.getContext(index));\n        return toFont(opts.font);\n    }\n _maxDigits() {\n        const fontSize = this._resolveTickFontOptions(0).lineHeight;\n        return (this.isHorizontal() ? this.width : this.height) / fontSize;\n    }\n}\n\nclass TypedRegistry {\n    constructor(type, scope, override){\n        this.type = type;\n        this.scope = scope;\n        this.override = override;\n        this.items = Object.create(null);\n    }\n    isForType(type) {\n        return Object.prototype.isPrototypeOf.call(this.type.prototype, type.prototype);\n    }\n register(item) {\n        const proto = Object.getPrototypeOf(item);\n        let parentScope;\n        if (isIChartComponent(proto)) {\n            parentScope = this.register(proto);\n        }\n        const items = this.items;\n        const id = item.id;\n        const scope = this.scope + '.' + id;\n        if (!id) {\n            throw new Error('class does not have id: ' + item);\n        }\n        if (id in items) {\n            return scope;\n        }\n        items[id] = item;\n        registerDefaults(item, scope, parentScope);\n        if (this.override) {\n            defaults.override(item.id, item.overrides);\n        }\n        return scope;\n    }\n get(id) {\n        return this.items[id];\n    }\n unregister(item) {\n        const items = this.items;\n        const id = item.id;\n        const scope = this.scope;\n        if (id in items) {\n            delete items[id];\n        }\n        if (scope && id in defaults[scope]) {\n            delete defaults[scope][id];\n            if (this.override) {\n                delete overrides[id];\n            }\n        }\n    }\n}\nfunction registerDefaults(item, scope, parentScope) {\n    const itemDefaults = merge(Object.create(null), [\n        parentScope ? defaults.get(parentScope) : {},\n        defaults.get(scope),\n        item.defaults\n    ]);\n    defaults.set(scope, itemDefaults);\n    if (item.defaultRoutes) {\n        routeDefaults(scope, item.defaultRoutes);\n    }\n    if (item.descriptors) {\n        defaults.describe(scope, item.descriptors);\n    }\n}\nfunction routeDefaults(scope, routes) {\n    Object.keys(routes).forEach((property)=>{\n        const propertyParts = property.split('.');\n        const sourceName = propertyParts.pop();\n        const sourceScope = [\n            scope\n        ].concat(propertyParts).join('.');\n        const parts = routes[property].split('.');\n        const targetName = parts.pop();\n        const targetScope = parts.join('.');\n        defaults.route(sourceScope, sourceName, targetScope, targetName);\n    });\n}\nfunction isIChartComponent(proto) {\n    return 'id' in proto && 'defaults' in proto;\n}\n\nclass Registry {\n    constructor(){\n        this.controllers = new TypedRegistry(DatasetController, 'datasets', true);\n        this.elements = new TypedRegistry(Element, 'elements');\n        this.plugins = new TypedRegistry(Object, 'plugins');\n        this.scales = new TypedRegistry(Scale, 'scales');\n        this._typedRegistries = [\n            this.controllers,\n            this.scales,\n            this.elements\n        ];\n    }\n add(...args) {\n        this._each('register', args);\n    }\n    remove(...args) {\n        this._each('unregister', args);\n    }\n addControllers(...args) {\n        this._each('register', args, this.controllers);\n    }\n addElements(...args) {\n        this._each('register', args, this.elements);\n    }\n addPlugins(...args) {\n        this._each('register', args, this.plugins);\n    }\n addScales(...args) {\n        this._each('register', args, this.scales);\n    }\n getController(id) {\n        return this._get(id, this.controllers, 'controller');\n    }\n getElement(id) {\n        return this._get(id, this.elements, 'element');\n    }\n getPlugin(id) {\n        return this._get(id, this.plugins, 'plugin');\n    }\n getScale(id) {\n        return this._get(id, this.scales, 'scale');\n    }\n removeControllers(...args) {\n        this._each('unregister', args, this.controllers);\n    }\n removeElements(...args) {\n        this._each('unregister', args, this.elements);\n    }\n removePlugins(...args) {\n        this._each('unregister', args, this.plugins);\n    }\n removeScales(...args) {\n        this._each('unregister', args, this.scales);\n    }\n _each(method, args, typedRegistry) {\n        [\n            ...args\n        ].forEach((arg)=>{\n            const reg = typedRegistry || this._getRegistryForType(arg);\n            if (typedRegistry || reg.isForType(arg) || reg === this.plugins && arg.id) {\n                this._exec(method, reg, arg);\n            } else {\n                each(arg, (item)=>{\n                    const itemReg = typedRegistry || this._getRegistryForType(item);\n                    this._exec(method, itemReg, item);\n                });\n            }\n        });\n    }\n _exec(method, registry, component) {\n        const camelMethod = _capitalize(method);\n        callback(component['before' + camelMethod], [], component);\n        registry[method](component);\n        callback(component['after' + camelMethod], [], component);\n    }\n _getRegistryForType(type) {\n        for(let i = 0; i < this._typedRegistries.length; i++){\n            const reg = this._typedRegistries[i];\n            if (reg.isForType(type)) {\n                return reg;\n            }\n        }\n        return this.plugins;\n    }\n _get(id, typedRegistry, type) {\n        const item = typedRegistry.get(id);\n        if (item === undefined) {\n            throw new Error('\"' + id + '\" is not a registered ' + type + '.');\n        }\n        return item;\n    }\n}\nvar registry = /* #__PURE__ */ new Registry();\n\nclass PluginService {\n    constructor(){\n        this._init = [];\n    }\n notify(chart, hook, args, filter) {\n        if (hook === 'beforeInit') {\n            this._init = this._createDescriptors(chart, true);\n            this._notify(this._init, chart, 'install');\n        }\n        const descriptors = filter ? this._descriptors(chart).filter(filter) : this._descriptors(chart);\n        const result = this._notify(descriptors, chart, hook, args);\n        if (hook === 'afterDestroy') {\n            this._notify(descriptors, chart, 'stop');\n            this._notify(this._init, chart, 'uninstall');\n        }\n        return result;\n    }\n _notify(descriptors, chart, hook, args) {\n        args = args || {};\n        for (const descriptor of descriptors){\n            const plugin = descriptor.plugin;\n            const method = plugin[hook];\n            const params = [\n                chart,\n                args,\n                descriptor.options\n            ];\n            if (callback(method, params, plugin) === false && args.cancelable) {\n                return false;\n            }\n        }\n        return true;\n    }\n    invalidate() {\n        if (!isNullOrUndef(this._cache)) {\n            this._oldCache = this._cache;\n            this._cache = undefined;\n        }\n    }\n _descriptors(chart) {\n        if (this._cache) {\n            return this._cache;\n        }\n        const descriptors = this._cache = this._createDescriptors(chart);\n        this._notifyStateChanges(chart);\n        return descriptors;\n    }\n    _createDescriptors(chart, all) {\n        const config = chart && chart.config;\n        const options = valueOrDefault(config.options && config.options.plugins, {});\n        const plugins = allPlugins(config);\n        return options === false && !all ? [] : createDescriptors(chart, plugins, options, all);\n    }\n _notifyStateChanges(chart) {\n        const previousDescriptors = this._oldCache || [];\n        const descriptors = this._cache;\n        const diff = (a, b)=>a.filter((x)=>!b.some((y)=>x.plugin.id === y.plugin.id));\n        this._notify(diff(previousDescriptors, descriptors), chart, 'stop');\n        this._notify(diff(descriptors, previousDescriptors), chart, 'start');\n    }\n}\n function allPlugins(config) {\n    const localIds = {};\n    const plugins = [];\n    const keys = Object.keys(registry.plugins.items);\n    for(let i = 0; i < keys.length; i++){\n        plugins.push(registry.getPlugin(keys[i]));\n    }\n    const local = config.plugins || [];\n    for(let i = 0; i < local.length; i++){\n        const plugin = local[i];\n        if (plugins.indexOf(plugin) === -1) {\n            plugins.push(plugin);\n            localIds[plugin.id] = true;\n        }\n    }\n    return {\n        plugins,\n        localIds\n    };\n}\nfunction getOpts(options, all) {\n    if (!all && options === false) {\n        return null;\n    }\n    if (options === true) {\n        return {};\n    }\n    return options;\n}\nfunction createDescriptors(chart, { plugins , localIds  }, options, all) {\n    const result = [];\n    const context = chart.getContext();\n    for (const plugin of plugins){\n        const id = plugin.id;\n        const opts = getOpts(options[id], all);\n        if (opts === null) {\n            continue;\n        }\n        result.push({\n            plugin,\n            options: pluginOpts(chart.config, {\n                plugin,\n                local: localIds[id]\n            }, opts, context)\n        });\n    }\n    return result;\n}\nfunction pluginOpts(config, { plugin , local  }, opts, context) {\n    const keys = config.pluginScopeKeys(plugin);\n    const scopes = config.getOptionScopes(opts, keys);\n    if (local && plugin.defaults) {\n        scopes.push(plugin.defaults);\n    }\n    return config.createResolver(scopes, context, [\n        ''\n    ], {\n        scriptable: false,\n        indexable: false,\n        allKeys: true\n    });\n}\n\nfunction getIndexAxis(type, options) {\n    const datasetDefaults = defaults.datasets[type] || {};\n    const datasetOptions = (options.datasets || {})[type] || {};\n    return datasetOptions.indexAxis || options.indexAxis || datasetDefaults.indexAxis || 'x';\n}\nfunction getAxisFromDefaultScaleID(id, indexAxis) {\n    let axis = id;\n    if (id === '_index_') {\n        axis = indexAxis;\n    } else if (id === '_value_') {\n        axis = indexAxis === 'x' ? 'y' : 'x';\n    }\n    return axis;\n}\nfunction getDefaultScaleIDFromAxis(axis, indexAxis) {\n    return axis === indexAxis ? '_index_' : '_value_';\n}\nfunction idMatchesAxis(id) {\n    if (id === 'x' || id === 'y' || id === 'r') {\n        return id;\n    }\n}\nfunction axisFromPosition(position) {\n    if (position === 'top' || position === 'bottom') {\n        return 'x';\n    }\n    if (position === 'left' || position === 'right') {\n        return 'y';\n    }\n}\nfunction determineAxis(id, ...scaleOptions) {\n    if (idMatchesAxis(id)) {\n        return id;\n    }\n    for (const opts of scaleOptions){\n        const axis = opts.axis || axisFromPosition(opts.position) || id.length > 1 && idMatchesAxis(id[0].toLowerCase());\n        if (axis) {\n            return axis;\n        }\n    }\n    throw new Error(`Cannot determine type of '${id}' axis. Please provide 'axis' or 'position' option.`);\n}\nfunction getAxisFromDataset(id, axis, dataset) {\n    if (dataset[axis + 'AxisID'] === id) {\n        return {\n            axis\n        };\n    }\n}\nfunction retrieveAxisFromDatasets(id, config) {\n    if (config.data && config.data.datasets) {\n        const boundDs = config.data.datasets.filter((d)=>d.xAxisID === id || d.yAxisID === id);\n        if (boundDs.length) {\n            return getAxisFromDataset(id, 'x', boundDs[0]) || getAxisFromDataset(id, 'y', boundDs[0]);\n        }\n    }\n    return {};\n}\nfunction mergeScaleConfig(config, options) {\n    const chartDefaults = overrides[config.type] || {\n        scales: {}\n    };\n    const configScales = options.scales || {};\n    const chartIndexAxis = getIndexAxis(config.type, options);\n    const scales = Object.create(null);\n    Object.keys(configScales).forEach((id)=>{\n        const scaleConf = configScales[id];\n        if (!isObject(scaleConf)) {\n            return console.error(`Invalid scale configuration for scale: ${id}`);\n        }\n        if (scaleConf._proxy) {\n            return console.warn(`Ignoring resolver passed as options for scale: ${id}`);\n        }\n        const axis = determineAxis(id, scaleConf, retrieveAxisFromDatasets(id, config), defaults.scales[scaleConf.type]);\n        const defaultId = getDefaultScaleIDFromAxis(axis, chartIndexAxis);\n        const defaultScaleOptions = chartDefaults.scales || {};\n        scales[id] = mergeIf(Object.create(null), [\n            {\n                axis\n            },\n            scaleConf,\n            defaultScaleOptions[axis],\n            defaultScaleOptions[defaultId]\n        ]);\n    });\n    config.data.datasets.forEach((dataset)=>{\n        const type = dataset.type || config.type;\n        const indexAxis = dataset.indexAxis || getIndexAxis(type, options);\n        const datasetDefaults = overrides[type] || {};\n        const defaultScaleOptions = datasetDefaults.scales || {};\n        Object.keys(defaultScaleOptions).forEach((defaultID)=>{\n            const axis = getAxisFromDefaultScaleID(defaultID, indexAxis);\n            const id = dataset[axis + 'AxisID'] || axis;\n            scales[id] = scales[id] || Object.create(null);\n            mergeIf(scales[id], [\n                {\n                    axis\n                },\n                configScales[id],\n                defaultScaleOptions[defaultID]\n            ]);\n        });\n    });\n    Object.keys(scales).forEach((key)=>{\n        const scale = scales[key];\n        mergeIf(scale, [\n            defaults.scales[scale.type],\n            defaults.scale\n        ]);\n    });\n    return scales;\n}\nfunction initOptions(config) {\n    const options = config.options || (config.options = {});\n    options.plugins = valueOrDefault(options.plugins, {});\n    options.scales = mergeScaleConfig(config, options);\n}\nfunction initData(data) {\n    data = data || {};\n    data.datasets = data.datasets || [];\n    data.labels = data.labels || [];\n    return data;\n}\nfunction initConfig(config) {\n    config = config || {};\n    config.data = initData(config.data);\n    initOptions(config);\n    return config;\n}\nconst keyCache = new Map();\nconst keysCached = new Set();\nfunction cachedKeys(cacheKey, generate) {\n    let keys = keyCache.get(cacheKey);\n    if (!keys) {\n        keys = generate();\n        keyCache.set(cacheKey, keys);\n        keysCached.add(keys);\n    }\n    return keys;\n}\nconst addIfFound = (set, obj, key)=>{\n    const opts = resolveObjectKey(obj, key);\n    if (opts !== undefined) {\n        set.add(opts);\n    }\n};\nclass Config {\n    constructor(config){\n        this._config = initConfig(config);\n        this._scopeCache = new Map();\n        this._resolverCache = new Map();\n    }\n    get platform() {\n        return this._config.platform;\n    }\n    get type() {\n        return this._config.type;\n    }\n    set type(type) {\n        this._config.type = type;\n    }\n    get data() {\n        return this._config.data;\n    }\n    set data(data) {\n        this._config.data = initData(data);\n    }\n    get options() {\n        return this._config.options;\n    }\n    set options(options) {\n        this._config.options = options;\n    }\n    get plugins() {\n        return this._config.plugins;\n    }\n    update() {\n        const config = this._config;\n        this.clearCache();\n        initOptions(config);\n    }\n    clearCache() {\n        this._scopeCache.clear();\n        this._resolverCache.clear();\n    }\n datasetScopeKeys(datasetType) {\n        return cachedKeys(datasetType, ()=>[\n                [\n                    `datasets.${datasetType}`,\n                    ''\n                ]\n            ]);\n    }\n datasetAnimationScopeKeys(datasetType, transition) {\n        return cachedKeys(`${datasetType}.transition.${transition}`, ()=>[\n                [\n                    `datasets.${datasetType}.transitions.${transition}`,\n                    `transitions.${transition}`\n                ],\n                [\n                    `datasets.${datasetType}`,\n                    ''\n                ]\n            ]);\n    }\n datasetElementScopeKeys(datasetType, elementType) {\n        return cachedKeys(`${datasetType}-${elementType}`, ()=>[\n                [\n                    `datasets.${datasetType}.elements.${elementType}`,\n                    `datasets.${datasetType}`,\n                    `elements.${elementType}`,\n                    ''\n                ]\n            ]);\n    }\n pluginScopeKeys(plugin) {\n        const id = plugin.id;\n        const type = this.type;\n        return cachedKeys(`${type}-plugin-${id}`, ()=>[\n                [\n                    `plugins.${id}`,\n                    ...plugin.additionalOptionScopes || []\n                ]\n            ]);\n    }\n _cachedScopes(mainScope, resetCache) {\n        const _scopeCache = this._scopeCache;\n        let cache = _scopeCache.get(mainScope);\n        if (!cache || resetCache) {\n            cache = new Map();\n            _scopeCache.set(mainScope, cache);\n        }\n        return cache;\n    }\n getOptionScopes(mainScope, keyLists, resetCache) {\n        const { options , type  } = this;\n        const cache = this._cachedScopes(mainScope, resetCache);\n        const cached = cache.get(keyLists);\n        if (cached) {\n            return cached;\n        }\n        const scopes = new Set();\n        keyLists.forEach((keys)=>{\n            if (mainScope) {\n                scopes.add(mainScope);\n                keys.forEach((key)=>addIfFound(scopes, mainScope, key));\n            }\n            keys.forEach((key)=>addIfFound(scopes, options, key));\n            keys.forEach((key)=>addIfFound(scopes, overrides[type] || {}, key));\n            keys.forEach((key)=>addIfFound(scopes, defaults, key));\n            keys.forEach((key)=>addIfFound(scopes, descriptors, key));\n        });\n        const array = Array.from(scopes);\n        if (array.length === 0) {\n            array.push(Object.create(null));\n        }\n        if (keysCached.has(keyLists)) {\n            cache.set(keyLists, array);\n        }\n        return array;\n    }\n chartOptionScopes() {\n        const { options , type  } = this;\n        return [\n            options,\n            overrides[type] || {},\n            defaults.datasets[type] || {},\n            {\n                type\n            },\n            defaults,\n            descriptors\n        ];\n    }\n resolveNamedOptions(scopes, names, context, prefixes = [\n        ''\n    ]) {\n        const result = {\n            $shared: true\n        };\n        const { resolver , subPrefixes  } = getResolver(this._resolverCache, scopes, prefixes);\n        let options = resolver;\n        if (needContext(resolver, names)) {\n            result.$shared = false;\n            context = isFunction(context) ? context() : context;\n            const subResolver = this.createResolver(scopes, context, subPrefixes);\n            options = _attachContext(resolver, context, subResolver);\n        }\n        for (const prop of names){\n            result[prop] = options[prop];\n        }\n        return result;\n    }\n createResolver(scopes, context, prefixes = [\n        ''\n    ], descriptorDefaults) {\n        const { resolver  } = getResolver(this._resolverCache, scopes, prefixes);\n        return isObject(context) ? _attachContext(resolver, context, undefined, descriptorDefaults) : resolver;\n    }\n}\nfunction getResolver(resolverCache, scopes, prefixes) {\n    let cache = resolverCache.get(scopes);\n    if (!cache) {\n        cache = new Map();\n        resolverCache.set(scopes, cache);\n    }\n    const cacheKey = prefixes.join();\n    let cached = cache.get(cacheKey);\n    if (!cached) {\n        const resolver = _createResolver(scopes, prefixes);\n        cached = {\n            resolver,\n            subPrefixes: prefixes.filter((p)=>!p.toLowerCase().includes('hover'))\n        };\n        cache.set(cacheKey, cached);\n    }\n    return cached;\n}\nconst hasFunction = (value)=>isObject(value) && Object.getOwnPropertyNames(value).some((key)=>isFunction(value[key]));\nfunction needContext(proxy, names) {\n    const { isScriptable , isIndexable  } = _descriptors(proxy);\n    for (const prop of names){\n        const scriptable = isScriptable(prop);\n        const indexable = isIndexable(prop);\n        const value = (indexable || scriptable) && proxy[prop];\n        if (scriptable && (isFunction(value) || hasFunction(value)) || indexable && isArray(value)) {\n            return true;\n        }\n    }\n    return false;\n}\n\nvar version = \"4.4.1\";\n\nconst KNOWN_POSITIONS = [\n    'top',\n    'bottom',\n    'left',\n    'right',\n    'chartArea'\n];\nfunction positionIsHorizontal(position, axis) {\n    return position === 'top' || position === 'bottom' || KNOWN_POSITIONS.indexOf(position) === -1 && axis === 'x';\n}\nfunction compare2Level(l1, l2) {\n    return function(a, b) {\n        return a[l1] === b[l1] ? a[l2] - b[l2] : a[l1] - b[l1];\n    };\n}\nfunction onAnimationsComplete(context) {\n    const chart = context.chart;\n    const animationOptions = chart.options.animation;\n    chart.notifyPlugins('afterRender');\n    callback(animationOptions && animationOptions.onComplete, [\n        context\n    ], chart);\n}\nfunction onAnimationProgress(context) {\n    const chart = context.chart;\n    const animationOptions = chart.options.animation;\n    callback(animationOptions && animationOptions.onProgress, [\n        context\n    ], chart);\n}\n function getCanvas(item) {\n    if (_isDomSupported() && typeof item === 'string') {\n        item = document.getElementById(item);\n    } else if (item && item.length) {\n        item = item[0];\n    }\n    if (item && item.canvas) {\n        item = item.canvas;\n    }\n    return item;\n}\nconst instances = {};\nconst getChart = (key)=>{\n    const canvas = getCanvas(key);\n    return Object.values(instances).filter((c)=>c.canvas === canvas).pop();\n};\nfunction moveNumericKeys(obj, start, move) {\n    const keys = Object.keys(obj);\n    for (const key of keys){\n        const intKey = +key;\n        if (intKey >= start) {\n            const value = obj[key];\n            delete obj[key];\n            if (move > 0 || intKey > start) {\n                obj[intKey + move] = value;\n            }\n        }\n    }\n}\n function determineLastEvent(e, lastEvent, inChartArea, isClick) {\n    if (!inChartArea || e.type === 'mouseout') {\n        return null;\n    }\n    if (isClick) {\n        return lastEvent;\n    }\n    return e;\n}\nfunction getSizeForArea(scale, chartArea, field) {\n    return scale.options.clip ? scale[field] : chartArea[field];\n}\nfunction getDatasetArea(meta, chartArea) {\n    const { xScale , yScale  } = meta;\n    if (xScale && yScale) {\n        return {\n            left: getSizeForArea(xScale, chartArea, 'left'),\n            right: getSizeForArea(xScale, chartArea, 'right'),\n            top: getSizeForArea(yScale, chartArea, 'top'),\n            bottom: getSizeForArea(yScale, chartArea, 'bottom')\n        };\n    }\n    return chartArea;\n}\nclass Chart {\n    static defaults = defaults;\n    static instances = instances;\n    static overrides = overrides;\n    static registry = registry;\n    static version = version;\n    static getChart = getChart;\n    static register(...items) {\n        registry.add(...items);\n        invalidatePlugins();\n    }\n    static unregister(...items) {\n        registry.remove(...items);\n        invalidatePlugins();\n    }\n    constructor(item, userConfig){\n        const config = this.config = new Config(userConfig);\n        const initialCanvas = getCanvas(item);\n        const existingChart = getChart(initialCanvas);\n        if (existingChart) {\n            throw new Error('Canvas is already in use. Chart with ID \\'' + existingChart.id + '\\'' + ' must be destroyed before the canvas with ID \\'' + existingChart.canvas.id + '\\' can be reused.');\n        }\n        const options = config.createResolver(config.chartOptionScopes(), this.getContext());\n        this.platform = new (config.platform || _detectPlatform(initialCanvas))();\n        this.platform.updateConfig(config);\n        const context = this.platform.acquireContext(initialCanvas, options.aspectRatio);\n        const canvas = context && context.canvas;\n        const height = canvas && canvas.height;\n        const width = canvas && canvas.width;\n        this.id = uid();\n        this.ctx = context;\n        this.canvas = canvas;\n        this.width = width;\n        this.height = height;\n        this._options = options;\n        this._aspectRatio = this.aspectRatio;\n        this._layers = [];\n        this._metasets = [];\n        this._stacks = undefined;\n        this.boxes = [];\n        this.currentDevicePixelRatio = undefined;\n        this.chartArea = undefined;\n        this._active = [];\n        this._lastEvent = undefined;\n        this._listeners = {};\n         this._responsiveListeners = undefined;\n        this._sortedMetasets = [];\n        this.scales = {};\n        this._plugins = new PluginService();\n        this.$proxies = {};\n        this._hiddenIndices = {};\n        this.attached = false;\n        this._animationsDisabled = undefined;\n        this.$context = undefined;\n        this._doResize = debounce((mode)=>this.update(mode), options.resizeDelay || 0);\n        this._dataChanges = [];\n        instances[this.id] = this;\n        if (!context || !canvas) {\n            console.error(\"Failed to create chart: can't acquire context from the given item\");\n            return;\n        }\n        animator.listen(this, 'complete', onAnimationsComplete);\n        animator.listen(this, 'progress', onAnimationProgress);\n        this._initialize();\n        if (this.attached) {\n            this.update();\n        }\n    }\n    get aspectRatio() {\n        const { options: { aspectRatio , maintainAspectRatio  } , width , height , _aspectRatio  } = this;\n        if (!isNullOrUndef(aspectRatio)) {\n            return aspectRatio;\n        }\n        if (maintainAspectRatio && _aspectRatio) {\n            return _aspectRatio;\n        }\n        return height ? width / height : null;\n    }\n    get data() {\n        return this.config.data;\n    }\n    set data(data) {\n        this.config.data = data;\n    }\n    get options() {\n        return this._options;\n    }\n    set options(options) {\n        this.config.options = options;\n    }\n    get registry() {\n        return registry;\n    }\n _initialize() {\n        this.notifyPlugins('beforeInit');\n        if (this.options.responsive) {\n            this.resize();\n        } else {\n            retinaScale(this, this.options.devicePixelRatio);\n        }\n        this.bindEvents();\n        this.notifyPlugins('afterInit');\n        return this;\n    }\n    clear() {\n        clearCanvas(this.canvas, this.ctx);\n        return this;\n    }\n    stop() {\n        animator.stop(this);\n        return this;\n    }\n resize(width, height) {\n        if (!animator.running(this)) {\n            this._resize(width, height);\n        } else {\n            this._resizeBeforeDraw = {\n                width,\n                height\n            };\n        }\n    }\n    _resize(width, height) {\n        const options = this.options;\n        const canvas = this.canvas;\n        const aspectRatio = options.maintainAspectRatio && this.aspectRatio;\n        const newSize = this.platform.getMaximumSize(canvas, width, height, aspectRatio);\n        const newRatio = options.devicePixelRatio || this.platform.getDevicePixelRatio();\n        const mode = this.width ? 'resize' : 'attach';\n        this.width = newSize.width;\n        this.height = newSize.height;\n        this._aspectRatio = this.aspectRatio;\n        if (!retinaScale(this, newRatio, true)) {\n            return;\n        }\n        this.notifyPlugins('resize', {\n            size: newSize\n        });\n        callback(options.onResize, [\n            this,\n            newSize\n        ], this);\n        if (this.attached) {\n            if (this._doResize(mode)) {\n                this.render();\n            }\n        }\n    }\n    ensureScalesHaveIDs() {\n        const options = this.options;\n        const scalesOptions = options.scales || {};\n        each(scalesOptions, (axisOptions, axisID)=>{\n            axisOptions.id = axisID;\n        });\n    }\n buildOrUpdateScales() {\n        const options = this.options;\n        const scaleOpts = options.scales;\n        const scales = this.scales;\n        const updated = Object.keys(scales).reduce((obj, id)=>{\n            obj[id] = false;\n            return obj;\n        }, {});\n        let items = [];\n        if (scaleOpts) {\n            items = items.concat(Object.keys(scaleOpts).map((id)=>{\n                const scaleOptions = scaleOpts[id];\n                const axis = determineAxis(id, scaleOptions);\n                const isRadial = axis === 'r';\n                const isHorizontal = axis === 'x';\n                return {\n                    options: scaleOptions,\n                    dposition: isRadial ? 'chartArea' : isHorizontal ? 'bottom' : 'left',\n                    dtype: isRadial ? 'radialLinear' : isHorizontal ? 'category' : 'linear'\n                };\n            }));\n        }\n        each(items, (item)=>{\n            const scaleOptions = item.options;\n            const id = scaleOptions.id;\n            const axis = determineAxis(id, scaleOptions);\n            const scaleType = valueOrDefault(scaleOptions.type, item.dtype);\n            if (scaleOptions.position === undefined || positionIsHorizontal(scaleOptions.position, axis) !== positionIsHorizontal(item.dposition)) {\n                scaleOptions.position = item.dposition;\n            }\n            updated[id] = true;\n            let scale = null;\n            if (id in scales && scales[id].type === scaleType) {\n                scale = scales[id];\n            } else {\n                const scaleClass = registry.getScale(scaleType);\n                scale = new scaleClass({\n                    id,\n                    type: scaleType,\n                    ctx: this.ctx,\n                    chart: this\n                });\n                scales[scale.id] = scale;\n            }\n            scale.init(scaleOptions, options);\n        });\n        each(updated, (hasUpdated, id)=>{\n            if (!hasUpdated) {\n                delete scales[id];\n            }\n        });\n        each(scales, (scale)=>{\n            layouts.configure(this, scale, scale.options);\n            layouts.addBox(this, scale);\n        });\n    }\n _updateMetasets() {\n        const metasets = this._metasets;\n        const numData = this.data.datasets.length;\n        const numMeta = metasets.length;\n        metasets.sort((a, b)=>a.index - b.index);\n        if (numMeta > numData) {\n            for(let i = numData; i < numMeta; ++i){\n                this._destroyDatasetMeta(i);\n            }\n            metasets.splice(numData, numMeta - numData);\n        }\n        this._sortedMetasets = metasets.slice(0).sort(compare2Level('order', 'index'));\n    }\n _removeUnreferencedMetasets() {\n        const { _metasets: metasets , data: { datasets  }  } = this;\n        if (metasets.length > datasets.length) {\n            delete this._stacks;\n        }\n        metasets.forEach((meta, index)=>{\n            if (datasets.filter((x)=>x === meta._dataset).length === 0) {\n                this._destroyDatasetMeta(index);\n            }\n        });\n    }\n    buildOrUpdateControllers() {\n        const newControllers = [];\n        const datasets = this.data.datasets;\n        let i, ilen;\n        this._removeUnreferencedMetasets();\n        for(i = 0, ilen = datasets.length; i < ilen; i++){\n            const dataset = datasets[i];\n            let meta = this.getDatasetMeta(i);\n            const type = dataset.type || this.config.type;\n            if (meta.type && meta.type !== type) {\n                this._destroyDatasetMeta(i);\n                meta = this.getDatasetMeta(i);\n            }\n            meta.type = type;\n            meta.indexAxis = dataset.indexAxis || getIndexAxis(type, this.options);\n            meta.order = dataset.order || 0;\n            meta.index = i;\n            meta.label = '' + dataset.label;\n            meta.visible = this.isDatasetVisible(i);\n            if (meta.controller) {\n                meta.controller.updateIndex(i);\n                meta.controller.linkScales();\n            } else {\n                const ControllerClass = registry.getController(type);\n                const { datasetElementType , dataElementType  } = defaults.datasets[type];\n                Object.assign(ControllerClass, {\n                    dataElementType: registry.getElement(dataElementType),\n                    datasetElementType: datasetElementType && registry.getElement(datasetElementType)\n                });\n                meta.controller = new ControllerClass(this, i);\n                newControllers.push(meta.controller);\n            }\n        }\n        this._updateMetasets();\n        return newControllers;\n    }\n _resetElements() {\n        each(this.data.datasets, (dataset, datasetIndex)=>{\n            this.getDatasetMeta(datasetIndex).controller.reset();\n        }, this);\n    }\n reset() {\n        this._resetElements();\n        this.notifyPlugins('reset');\n    }\n    update(mode) {\n        const config = this.config;\n        config.update();\n        const options = this._options = config.createResolver(config.chartOptionScopes(), this.getContext());\n        const animsDisabled = this._animationsDisabled = !options.animation;\n        this._updateScales();\n        this._checkEventBindings();\n        this._updateHiddenIndices();\n        this._plugins.invalidate();\n        if (this.notifyPlugins('beforeUpdate', {\n            mode,\n            cancelable: true\n        }) === false) {\n            return;\n        }\n        const newControllers = this.buildOrUpdateControllers();\n        this.notifyPlugins('beforeElementsUpdate');\n        let minPadding = 0;\n        for(let i = 0, ilen = this.data.datasets.length; i < ilen; i++){\n            const { controller  } = this.getDatasetMeta(i);\n            const reset = !animsDisabled && newControllers.indexOf(controller) === -1;\n            controller.buildOrUpdateElements(reset);\n            minPadding = Math.max(+controller.getMaxOverflow(), minPadding);\n        }\n        minPadding = this._minPadding = options.layout.autoPadding ? minPadding : 0;\n        this._updateLayout(minPadding);\n        if (!animsDisabled) {\n            each(newControllers, (controller)=>{\n                controller.reset();\n            });\n        }\n        this._updateDatasets(mode);\n        this.notifyPlugins('afterUpdate', {\n            mode\n        });\n        this._layers.sort(compare2Level('z', '_idx'));\n        const { _active , _lastEvent  } = this;\n        if (_lastEvent) {\n            this._eventHandler(_lastEvent, true);\n        } else if (_active.length) {\n            this._updateHoverStyles(_active, _active, true);\n        }\n        this.render();\n    }\n _updateScales() {\n        each(this.scales, (scale)=>{\n            layouts.removeBox(this, scale);\n        });\n        this.ensureScalesHaveIDs();\n        this.buildOrUpdateScales();\n    }\n _checkEventBindings() {\n        const options = this.options;\n        const existingEvents = new Set(Object.keys(this._listeners));\n        const newEvents = new Set(options.events);\n        if (!setsEqual(existingEvents, newEvents) || !!this._responsiveListeners !== options.responsive) {\n            this.unbindEvents();\n            this.bindEvents();\n        }\n    }\n _updateHiddenIndices() {\n        const { _hiddenIndices  } = this;\n        const changes = this._getUniformDataChanges() || [];\n        for (const { method , start , count  } of changes){\n            const move = method === '_removeElements' ? -count : count;\n            moveNumericKeys(_hiddenIndices, start, move);\n        }\n    }\n _getUniformDataChanges() {\n        const _dataChanges = this._dataChanges;\n        if (!_dataChanges || !_dataChanges.length) {\n            return;\n        }\n        this._dataChanges = [];\n        const datasetCount = this.data.datasets.length;\n        const makeSet = (idx)=>new Set(_dataChanges.filter((c)=>c[0] === idx).map((c, i)=>i + ',' + c.splice(1).join(',')));\n        const changeSet = makeSet(0);\n        for(let i = 1; i < datasetCount; i++){\n            if (!setsEqual(changeSet, makeSet(i))) {\n                return;\n            }\n        }\n        return Array.from(changeSet).map((c)=>c.split(',')).map((a)=>({\n                method: a[1],\n                start: +a[2],\n                count: +a[3]\n            }));\n    }\n _updateLayout(minPadding) {\n        if (this.notifyPlugins('beforeLayout', {\n            cancelable: true\n        }) === false) {\n            return;\n        }\n        layouts.update(this, this.width, this.height, minPadding);\n        const area = this.chartArea;\n        const noArea = area.width <= 0 || area.height <= 0;\n        this._layers = [];\n        each(this.boxes, (box)=>{\n            if (noArea && box.position === 'chartArea') {\n                return;\n            }\n            if (box.configure) {\n                box.configure();\n            }\n            this._layers.push(...box._layers());\n        }, this);\n        this._layers.forEach((item, index)=>{\n            item._idx = index;\n        });\n        this.notifyPlugins('afterLayout');\n    }\n _updateDatasets(mode) {\n        if (this.notifyPlugins('beforeDatasetsUpdate', {\n            mode,\n            cancelable: true\n        }) === false) {\n            return;\n        }\n        for(let i = 0, ilen = this.data.datasets.length; i < ilen; ++i){\n            this.getDatasetMeta(i).controller.configure();\n        }\n        for(let i = 0, ilen = this.data.datasets.length; i < ilen; ++i){\n            this._updateDataset(i, isFunction(mode) ? mode({\n                datasetIndex: i\n            }) : mode);\n        }\n        this.notifyPlugins('afterDatasetsUpdate', {\n            mode\n        });\n    }\n _updateDataset(index, mode) {\n        const meta = this.getDatasetMeta(index);\n        const args = {\n            meta,\n            index,\n            mode,\n            cancelable: true\n        };\n        if (this.notifyPlugins('beforeDatasetUpdate', args) === false) {\n            return;\n        }\n        meta.controller._update(mode);\n        args.cancelable = false;\n        this.notifyPlugins('afterDatasetUpdate', args);\n    }\n    render() {\n        if (this.notifyPlugins('beforeRender', {\n            cancelable: true\n        }) === false) {\n            return;\n        }\n        if (animator.has(this)) {\n            if (this.attached && !animator.running(this)) {\n                animator.start(this);\n            }\n        } else {\n            this.draw();\n            onAnimationsComplete({\n                chart: this\n            });\n        }\n    }\n    draw() {\n        let i;\n        if (this._resizeBeforeDraw) {\n            const { width , height  } = this._resizeBeforeDraw;\n            this._resize(width, height);\n            this._resizeBeforeDraw = null;\n        }\n        this.clear();\n        if (this.width <= 0 || this.height <= 0) {\n            return;\n        }\n        if (this.notifyPlugins('beforeDraw', {\n            cancelable: true\n        }) === false) {\n            return;\n        }\n        const layers = this._layers;\n        for(i = 0; i < layers.length && layers[i].z <= 0; ++i){\n            layers[i].draw(this.chartArea);\n        }\n        this._drawDatasets();\n        for(; i < layers.length; ++i){\n            layers[i].draw(this.chartArea);\n        }\n        this.notifyPlugins('afterDraw');\n    }\n _getSortedDatasetMetas(filterVisible) {\n        const metasets = this._sortedMetasets;\n        const result = [];\n        let i, ilen;\n        for(i = 0, ilen = metasets.length; i < ilen; ++i){\n            const meta = metasets[i];\n            if (!filterVisible || meta.visible) {\n                result.push(meta);\n            }\n        }\n        return result;\n    }\n getSortedVisibleDatasetMetas() {\n        return this._getSortedDatasetMetas(true);\n    }\n _drawDatasets() {\n        if (this.notifyPlugins('beforeDatasetsDraw', {\n            cancelable: true\n        }) === false) {\n            return;\n        }\n        const metasets = this.getSortedVisibleDatasetMetas();\n        for(let i = metasets.length - 1; i >= 0; --i){\n            this._drawDataset(metasets[i]);\n        }\n        this.notifyPlugins('afterDatasetsDraw');\n    }\n _drawDataset(meta) {\n        const ctx = this.ctx;\n        const clip = meta._clip;\n        const useClip = !clip.disabled;\n        const area = getDatasetArea(meta, this.chartArea);\n        const args = {\n            meta,\n            index: meta.index,\n            cancelable: true\n        };\n        if (this.notifyPlugins('beforeDatasetDraw', args) === false) {\n            return;\n        }\n        if (useClip) {\n            clipArea(ctx, {\n                left: clip.left === false ? 0 : area.left - clip.left,\n                right: clip.right === false ? this.width : area.right + clip.right,\n                top: clip.top === false ? 0 : area.top - clip.top,\n                bottom: clip.bottom === false ? this.height : area.bottom + clip.bottom\n            });\n        }\n        meta.controller.draw();\n        if (useClip) {\n            unclipArea(ctx);\n        }\n        args.cancelable = false;\n        this.notifyPlugins('afterDatasetDraw', args);\n    }\n isPointInArea(point) {\n        return _isPointInArea(point, this.chartArea, this._minPadding);\n    }\n    getElementsAtEventForMode(e, mode, options, useFinalPosition) {\n        const method = Interaction.modes[mode];\n        if (typeof method === 'function') {\n            return method(this, e, options, useFinalPosition);\n        }\n        return [];\n    }\n    getDatasetMeta(datasetIndex) {\n        const dataset = this.data.datasets[datasetIndex];\n        const metasets = this._metasets;\n        let meta = metasets.filter((x)=>x && x._dataset === dataset).pop();\n        if (!meta) {\n            meta = {\n                type: null,\n                data: [],\n                dataset: null,\n                controller: null,\n                hidden: null,\n                xAxisID: null,\n                yAxisID: null,\n                order: dataset && dataset.order || 0,\n                index: datasetIndex,\n                _dataset: dataset,\n                _parsed: [],\n                _sorted: false\n            };\n            metasets.push(meta);\n        }\n        return meta;\n    }\n    getContext() {\n        return this.$context || (this.$context = createContext(null, {\n            chart: this,\n            type: 'chart'\n        }));\n    }\n    getVisibleDatasetCount() {\n        return this.getSortedVisibleDatasetMetas().length;\n    }\n    isDatasetVisible(datasetIndex) {\n        const dataset = this.data.datasets[datasetIndex];\n        if (!dataset) {\n            return false;\n        }\n        const meta = this.getDatasetMeta(datasetIndex);\n        return typeof meta.hidden === 'boolean' ? !meta.hidden : !dataset.hidden;\n    }\n    setDatasetVisibility(datasetIndex, visible) {\n        const meta = this.getDatasetMeta(datasetIndex);\n        meta.hidden = !visible;\n    }\n    toggleDataVisibility(index) {\n        this._hiddenIndices[index] = !this._hiddenIndices[index];\n    }\n    getDataVisibility(index) {\n        return !this._hiddenIndices[index];\n    }\n _updateVisibility(datasetIndex, dataIndex, visible) {\n        const mode = visible ? 'show' : 'hide';\n        const meta = this.getDatasetMeta(datasetIndex);\n        const anims = meta.controller._resolveAnimations(undefined, mode);\n        if (defined(dataIndex)) {\n            meta.data[dataIndex].hidden = !visible;\n            this.update();\n        } else {\n            this.setDatasetVisibility(datasetIndex, visible);\n            anims.update(meta, {\n                visible\n            });\n            this.update((ctx)=>ctx.datasetIndex === datasetIndex ? mode : undefined);\n        }\n    }\n    hide(datasetIndex, dataIndex) {\n        this._updateVisibility(datasetIndex, dataIndex, false);\n    }\n    show(datasetIndex, dataIndex) {\n        this._updateVisibility(datasetIndex, dataIndex, true);\n    }\n _destroyDatasetMeta(datasetIndex) {\n        const meta = this._metasets[datasetIndex];\n        if (meta && meta.controller) {\n            meta.controller._destroy();\n        }\n        delete this._metasets[datasetIndex];\n    }\n    _stop() {\n        let i, ilen;\n        this.stop();\n        animator.remove(this);\n        for(i = 0, ilen = this.data.datasets.length; i < ilen; ++i){\n            this._destroyDatasetMeta(i);\n        }\n    }\n    destroy() {\n        this.notifyPlugins('beforeDestroy');\n        const { canvas , ctx  } = this;\n        this._stop();\n        this.config.clearCache();\n        if (canvas) {\n            this.unbindEvents();\n            clearCanvas(canvas, ctx);\n            this.platform.releaseContext(ctx);\n            this.canvas = null;\n            this.ctx = null;\n        }\n        delete instances[this.id];\n        this.notifyPlugins('afterDestroy');\n    }\n    toBase64Image(...args) {\n        return this.canvas.toDataURL(...args);\n    }\n bindEvents() {\n        this.bindUserEvents();\n        if (this.options.responsive) {\n            this.bindResponsiveEvents();\n        } else {\n            this.attached = true;\n        }\n    }\n bindUserEvents() {\n        const listeners = this._listeners;\n        const platform = this.platform;\n        const _add = (type, listener)=>{\n            platform.addEventListener(this, type, listener);\n            listeners[type] = listener;\n        };\n        const listener = (e, x, y)=>{\n            e.offsetX = x;\n            e.offsetY = y;\n            this._eventHandler(e);\n        };\n        each(this.options.events, (type)=>_add(type, listener));\n    }\n bindResponsiveEvents() {\n        if (!this._responsiveListeners) {\n            this._responsiveListeners = {};\n        }\n        const listeners = this._responsiveListeners;\n        const platform = this.platform;\n        const _add = (type, listener)=>{\n            platform.addEventListener(this, type, listener);\n            listeners[type] = listener;\n        };\n        const _remove = (type, listener)=>{\n            if (listeners[type]) {\n                platform.removeEventListener(this, type, listener);\n                delete listeners[type];\n            }\n        };\n        const listener = (width, height)=>{\n            if (this.canvas) {\n                this.resize(width, height);\n            }\n        };\n        let detached;\n        const attached = ()=>{\n            _remove('attach', attached);\n            this.attached = true;\n            this.resize();\n            _add('resize', listener);\n            _add('detach', detached);\n        };\n        detached = ()=>{\n            this.attached = false;\n            _remove('resize', listener);\n            this._stop();\n            this._resize(0, 0);\n            _add('attach', attached);\n        };\n        if (platform.isAttached(this.canvas)) {\n            attached();\n        } else {\n            detached();\n        }\n    }\n unbindEvents() {\n        each(this._listeners, (listener, type)=>{\n            this.platform.removeEventListener(this, type, listener);\n        });\n        this._listeners = {};\n        each(this._responsiveListeners, (listener, type)=>{\n            this.platform.removeEventListener(this, type, listener);\n        });\n        this._responsiveListeners = undefined;\n    }\n    updateHoverStyle(items, mode, enabled) {\n        const prefix = enabled ? 'set' : 'remove';\n        let meta, item, i, ilen;\n        if (mode === 'dataset') {\n            meta = this.getDatasetMeta(items[0].datasetIndex);\n            meta.controller['_' + prefix + 'DatasetHoverStyle']();\n        }\n        for(i = 0, ilen = items.length; i < ilen; ++i){\n            item = items[i];\n            const controller = item && this.getDatasetMeta(item.datasetIndex).controller;\n            if (controller) {\n                controller[prefix + 'HoverStyle'](item.element, item.datasetIndex, item.index);\n            }\n        }\n    }\n getActiveElements() {\n        return this._active || [];\n    }\n setActiveElements(activeElements) {\n        const lastActive = this._active || [];\n        const active = activeElements.map(({ datasetIndex , index  })=>{\n            const meta = this.getDatasetMeta(datasetIndex);\n            if (!meta) {\n                throw new Error('No dataset found at index ' + datasetIndex);\n            }\n            return {\n                datasetIndex,\n                element: meta.data[index],\n                index\n            };\n        });\n        const changed = !_elementsEqual(active, lastActive);\n        if (changed) {\n            this._active = active;\n            this._lastEvent = null;\n            this._updateHoverStyles(active, lastActive);\n        }\n    }\n notifyPlugins(hook, args, filter) {\n        return this._plugins.notify(this, hook, args, filter);\n    }\n isPluginEnabled(pluginId) {\n        return this._plugins._cache.filter((p)=>p.plugin.id === pluginId).length === 1;\n    }\n _updateHoverStyles(active, lastActive, replay) {\n        const hoverOptions = this.options.hover;\n        const diff = (a, b)=>a.filter((x)=>!b.some((y)=>x.datasetIndex === y.datasetIndex && x.index === y.index));\n        const deactivated = diff(lastActive, active);\n        const activated = replay ? active : diff(active, lastActive);\n        if (deactivated.length) {\n            this.updateHoverStyle(deactivated, hoverOptions.mode, false);\n        }\n        if (activated.length && hoverOptions.mode) {\n            this.updateHoverStyle(activated, hoverOptions.mode, true);\n        }\n    }\n _eventHandler(e, replay) {\n        const args = {\n            event: e,\n            replay,\n            cancelable: true,\n            inChartArea: this.isPointInArea(e)\n        };\n        const eventFilter = (plugin)=>(plugin.options.events || this.options.events).includes(e.native.type);\n        if (this.notifyPlugins('beforeEvent', args, eventFilter) === false) {\n            return;\n        }\n        const changed = this._handleEvent(e, replay, args.inChartArea);\n        args.cancelable = false;\n        this.notifyPlugins('afterEvent', args, eventFilter);\n        if (changed || args.changed) {\n            this.render();\n        }\n        return this;\n    }\n _handleEvent(e, replay, inChartArea) {\n        const { _active: lastActive = [] , options  } = this;\n        const useFinalPosition = replay;\n        const active = this._getActiveElements(e, lastActive, inChartArea, useFinalPosition);\n        const isClick = _isClickEvent(e);\n        const lastEvent = determineLastEvent(e, this._lastEvent, inChartArea, isClick);\n        if (inChartArea) {\n            this._lastEvent = null;\n            callback(options.onHover, [\n                e,\n                active,\n                this\n            ], this);\n            if (isClick) {\n                callback(options.onClick, [\n                    e,\n                    active,\n                    this\n                ], this);\n            }\n        }\n        const changed = !_elementsEqual(active, lastActive);\n        if (changed || replay) {\n            this._active = active;\n            this._updateHoverStyles(active, lastActive, replay);\n        }\n        this._lastEvent = lastEvent;\n        return changed;\n    }\n _getActiveElements(e, lastActive, inChartArea, useFinalPosition) {\n        if (e.type === 'mouseout') {\n            return [];\n        }\n        if (!inChartArea) {\n            return lastActive;\n        }\n        const hoverOptions = this.options.hover;\n        return this.getElementsAtEventForMode(e, hoverOptions.mode, hoverOptions, useFinalPosition);\n    }\n}\nfunction invalidatePlugins() {\n    return each(Chart.instances, (chart)=>chart._plugins.invalidate());\n}\n\nfunction clipArc(ctx, element, endAngle) {\n    const { startAngle , pixelMargin , x , y , outerRadius , innerRadius  } = element;\n    let angleMargin = pixelMargin / outerRadius;\n    // Draw an inner border by clipping the arc and drawing a double-width border\n    // Enlarge the clipping arc by 0.33 pixels to eliminate glitches between borders\n    ctx.beginPath();\n    ctx.arc(x, y, outerRadius, startAngle - angleMargin, endAngle + angleMargin);\n    if (innerRadius > pixelMargin) {\n        angleMargin = pixelMargin / innerRadius;\n        ctx.arc(x, y, innerRadius, endAngle + angleMargin, startAngle - angleMargin, true);\n    } else {\n        ctx.arc(x, y, pixelMargin, endAngle + HALF_PI, startAngle - HALF_PI);\n    }\n    ctx.closePath();\n    ctx.clip();\n}\nfunction toRadiusCorners(value) {\n    return _readValueToProps(value, [\n        'outerStart',\n        'outerEnd',\n        'innerStart',\n        'innerEnd'\n    ]);\n}\n/**\n * Parse border radius from the provided options\n */ function parseBorderRadius$1(arc, innerRadius, outerRadius, angleDelta) {\n    const o = toRadiusCorners(arc.options.borderRadius);\n    const halfThickness = (outerRadius - innerRadius) / 2;\n    const innerLimit = Math.min(halfThickness, angleDelta * innerRadius / 2);\n    // Outer limits are complicated. We want to compute the available angular distance at\n    // a radius of outerRadius - borderRadius because for small angular distances, this term limits.\n    // We compute at r = outerRadius - borderRadius because this circle defines the center of the border corners.\n    //\n    // If the borderRadius is large, that value can become negative.\n    // This causes the outer borders to lose their radius entirely, which is rather unexpected. To solve that, if borderRadius > outerRadius\n    // we know that the thickness term will dominate and compute the limits at that point\n    const computeOuterLimit = (val)=>{\n        const outerArcLimit = (outerRadius - Math.min(halfThickness, val)) * angleDelta / 2;\n        return _limitValue(val, 0, Math.min(halfThickness, outerArcLimit));\n    };\n    return {\n        outerStart: computeOuterLimit(o.outerStart),\n        outerEnd: computeOuterLimit(o.outerEnd),\n        innerStart: _limitValue(o.innerStart, 0, innerLimit),\n        innerEnd: _limitValue(o.innerEnd, 0, innerLimit)\n    };\n}\n/**\n * Convert (r, 𝜃) to (x, y)\n */ function rThetaToXY(r, theta, x, y) {\n    return {\n        x: x + r * Math.cos(theta),\n        y: y + r * Math.sin(theta)\n    };\n}\n/**\n * Path the arc, respecting border radius by separating into left and right halves.\n *\n *   Start      End\n *\n *    1--->a--->2    Outer\n *   /           \\\n *   8           3\n *   |           |\n *   |           |\n *   7           4\n *   \\           /\n *    6<---b<---5    Inner\n */ function pathArc(ctx, element, offset, spacing, end, circular) {\n    const { x , y , startAngle: start , pixelMargin , innerRadius: innerR  } = element;\n    const outerRadius = Math.max(element.outerRadius + spacing + offset - pixelMargin, 0);\n    const innerRadius = innerR > 0 ? innerR + spacing + offset + pixelMargin : 0;\n    let spacingOffset = 0;\n    const alpha = end - start;\n    if (spacing) {\n        // When spacing is present, it is the same for all items\n        // So we adjust the start and end angle of the arc such that\n        // the distance is the same as it would be without the spacing\n        const noSpacingInnerRadius = innerR > 0 ? innerR - spacing : 0;\n        const noSpacingOuterRadius = outerRadius > 0 ? outerRadius - spacing : 0;\n        const avNogSpacingRadius = (noSpacingInnerRadius + noSpacingOuterRadius) / 2;\n        const adjustedAngle = avNogSpacingRadius !== 0 ? alpha * avNogSpacingRadius / (avNogSpacingRadius + spacing) : alpha;\n        spacingOffset = (alpha - adjustedAngle) / 2;\n    }\n    const beta = Math.max(0.001, alpha * outerRadius - offset / PI) / outerRadius;\n    const angleOffset = (alpha - beta) / 2;\n    const startAngle = start + angleOffset + spacingOffset;\n    const endAngle = end - angleOffset - spacingOffset;\n    const { outerStart , outerEnd , innerStart , innerEnd  } = parseBorderRadius$1(element, innerRadius, outerRadius, endAngle - startAngle);\n    const outerStartAdjustedRadius = outerRadius - outerStart;\n    const outerEndAdjustedRadius = outerRadius - outerEnd;\n    const outerStartAdjustedAngle = startAngle + outerStart / outerStartAdjustedRadius;\n    const outerEndAdjustedAngle = endAngle - outerEnd / outerEndAdjustedRadius;\n    const innerStartAdjustedRadius = innerRadius + innerStart;\n    const innerEndAdjustedRadius = innerRadius + innerEnd;\n    const innerStartAdjustedAngle = startAngle + innerStart / innerStartAdjustedRadius;\n    const innerEndAdjustedAngle = endAngle - innerEnd / innerEndAdjustedRadius;\n    ctx.beginPath();\n    if (circular) {\n        // The first arc segments from point 1 to point a to point 2\n        const outerMidAdjustedAngle = (outerStartAdjustedAngle + outerEndAdjustedAngle) / 2;\n        ctx.arc(x, y, outerRadius, outerStartAdjustedAngle, outerMidAdjustedAngle);\n        ctx.arc(x, y, outerRadius, outerMidAdjustedAngle, outerEndAdjustedAngle);\n        // The corner segment from point 2 to point 3\n        if (outerEnd > 0) {\n            const pCenter = rThetaToXY(outerEndAdjustedRadius, outerEndAdjustedAngle, x, y);\n            ctx.arc(pCenter.x, pCenter.y, outerEnd, outerEndAdjustedAngle, endAngle + HALF_PI);\n        }\n        // The line from point 3 to point 4\n        const p4 = rThetaToXY(innerEndAdjustedRadius, endAngle, x, y);\n        ctx.lineTo(p4.x, p4.y);\n        // The corner segment from point 4 to point 5\n        if (innerEnd > 0) {\n            const pCenter = rThetaToXY(innerEndAdjustedRadius, innerEndAdjustedAngle, x, y);\n            ctx.arc(pCenter.x, pCenter.y, innerEnd, endAngle + HALF_PI, innerEndAdjustedAngle + Math.PI);\n        }\n        // The inner arc from point 5 to point b to point 6\n        const innerMidAdjustedAngle = (endAngle - innerEnd / innerRadius + (startAngle + innerStart / innerRadius)) / 2;\n        ctx.arc(x, y, innerRadius, endAngle - innerEnd / innerRadius, innerMidAdjustedAngle, true);\n        ctx.arc(x, y, innerRadius, innerMidAdjustedAngle, startAngle + innerStart / innerRadius, true);\n        // The corner segment from point 6 to point 7\n        if (innerStart > 0) {\n            const pCenter = rThetaToXY(innerStartAdjustedRadius, innerStartAdjustedAngle, x, y);\n            ctx.arc(pCenter.x, pCenter.y, innerStart, innerStartAdjustedAngle + Math.PI, startAngle - HALF_PI);\n        }\n        // The line from point 7 to point 8\n        const p8 = rThetaToXY(outerStartAdjustedRadius, startAngle, x, y);\n        ctx.lineTo(p8.x, p8.y);\n        // The corner segment from point 8 to point 1\n        if (outerStart > 0) {\n            const pCenter = rThetaToXY(outerStartAdjustedRadius, outerStartAdjustedAngle, x, y);\n            ctx.arc(pCenter.x, pCenter.y, outerStart, startAngle - HALF_PI, outerStartAdjustedAngle);\n        }\n    } else {\n        ctx.moveTo(x, y);\n        const outerStartX = Math.cos(outerStartAdjustedAngle) * outerRadius + x;\n        const outerStartY = Math.sin(outerStartAdjustedAngle) * outerRadius + y;\n        ctx.lineTo(outerStartX, outerStartY);\n        const outerEndX = Math.cos(outerEndAdjustedAngle) * outerRadius + x;\n        const outerEndY = Math.sin(outerEndAdjustedAngle) * outerRadius + y;\n        ctx.lineTo(outerEndX, outerEndY);\n    }\n    ctx.closePath();\n}\nfunction drawArc(ctx, element, offset, spacing, circular) {\n    const { fullCircles , startAngle , circumference  } = element;\n    let endAngle = element.endAngle;\n    if (fullCircles) {\n        pathArc(ctx, element, offset, spacing, endAngle, circular);\n        for(let i = 0; i < fullCircles; ++i){\n            ctx.fill();\n        }\n        if (!isNaN(circumference)) {\n            endAngle = startAngle + (circumference % TAU || TAU);\n        }\n    }\n    pathArc(ctx, element, offset, spacing, endAngle, circular);\n    ctx.fill();\n    return endAngle;\n}\nfunction drawBorder(ctx, element, offset, spacing, circular) {\n    const { fullCircles , startAngle , circumference , options  } = element;\n    const { borderWidth , borderJoinStyle , borderDash , borderDashOffset  } = options;\n    const inner = options.borderAlign === 'inner';\n    if (!borderWidth) {\n        return;\n    }\n    ctx.setLineDash(borderDash || []);\n    ctx.lineDashOffset = borderDashOffset;\n    if (inner) {\n        ctx.lineWidth = borderWidth * 2;\n        ctx.lineJoin = borderJoinStyle || 'round';\n    } else {\n        ctx.lineWidth = borderWidth;\n        ctx.lineJoin = borderJoinStyle || 'bevel';\n    }\n    let endAngle = element.endAngle;\n    if (fullCircles) {\n        pathArc(ctx, element, offset, spacing, endAngle, circular);\n        for(let i = 0; i < fullCircles; ++i){\n            ctx.stroke();\n        }\n        if (!isNaN(circumference)) {\n            endAngle = startAngle + (circumference % TAU || TAU);\n        }\n    }\n    if (inner) {\n        clipArc(ctx, element, endAngle);\n    }\n    if (!fullCircles) {\n        pathArc(ctx, element, offset, spacing, endAngle, circular);\n        ctx.stroke();\n    }\n}\nclass ArcElement extends Element {\n    static id = 'arc';\n    static defaults = {\n        borderAlign: 'center',\n        borderColor: '#fff',\n        borderDash: [],\n        borderDashOffset: 0,\n        borderJoinStyle: undefined,\n        borderRadius: 0,\n        borderWidth: 2,\n        offset: 0,\n        spacing: 0,\n        angle: undefined,\n        circular: true\n    };\n    static defaultRoutes = {\n        backgroundColor: 'backgroundColor'\n    };\n    static descriptors = {\n        _scriptable: true,\n        _indexable: (name)=>name !== 'borderDash'\n    };\n    circumference;\n    endAngle;\n    fullCircles;\n    innerRadius;\n    outerRadius;\n    pixelMargin;\n    startAngle;\n    constructor(cfg){\n        super();\n        this.options = undefined;\n        this.circumference = undefined;\n        this.startAngle = undefined;\n        this.endAngle = undefined;\n        this.innerRadius = undefined;\n        this.outerRadius = undefined;\n        this.pixelMargin = 0;\n        this.fullCircles = 0;\n        if (cfg) {\n            Object.assign(this, cfg);\n        }\n    }\n    inRange(chartX, chartY, useFinalPosition) {\n        const point = this.getProps([\n            'x',\n            'y'\n        ], useFinalPosition);\n        const { angle , distance  } = getAngleFromPoint(point, {\n            x: chartX,\n            y: chartY\n        });\n        const { startAngle , endAngle , innerRadius , outerRadius , circumference  } = this.getProps([\n            'startAngle',\n            'endAngle',\n            'innerRadius',\n            'outerRadius',\n            'circumference'\n        ], useFinalPosition);\n        const rAdjust = (this.options.spacing + this.options.borderWidth) / 2;\n        const _circumference = valueOrDefault(circumference, endAngle - startAngle);\n        const betweenAngles = _circumference >= TAU || _angleBetween(angle, startAngle, endAngle);\n        const withinRadius = _isBetween(distance, innerRadius + rAdjust, outerRadius + rAdjust);\n        return betweenAngles && withinRadius;\n    }\n    getCenterPoint(useFinalPosition) {\n        const { x , y , startAngle , endAngle , innerRadius , outerRadius  } = this.getProps([\n            'x',\n            'y',\n            'startAngle',\n            'endAngle',\n            'innerRadius',\n            'outerRadius'\n        ], useFinalPosition);\n        const { offset , spacing  } = this.options;\n        const halfAngle = (startAngle + endAngle) / 2;\n        const halfRadius = (innerRadius + outerRadius + spacing + offset) / 2;\n        return {\n            x: x + Math.cos(halfAngle) * halfRadius,\n            y: y + Math.sin(halfAngle) * halfRadius\n        };\n    }\n    tooltipPosition(useFinalPosition) {\n        return this.getCenterPoint(useFinalPosition);\n    }\n    draw(ctx) {\n        const { options , circumference  } = this;\n        const offset = (options.offset || 0) / 4;\n        const spacing = (options.spacing || 0) / 2;\n        const circular = options.circular;\n        this.pixelMargin = options.borderAlign === 'inner' ? 0.33 : 0;\n        this.fullCircles = circumference > TAU ? Math.floor(circumference / TAU) : 0;\n        if (circumference === 0 || this.innerRadius < 0 || this.outerRadius < 0) {\n            return;\n        }\n        ctx.save();\n        const halfAngle = (this.startAngle + this.endAngle) / 2;\n        ctx.translate(Math.cos(halfAngle) * offset, Math.sin(halfAngle) * offset);\n        const fix = 1 - Math.sin(Math.min(PI, circumference || 0));\n        const radiusOffset = offset * fix;\n        ctx.fillStyle = options.backgroundColor;\n        ctx.strokeStyle = options.borderColor;\n        drawArc(ctx, this, radiusOffset, spacing, circular);\n        drawBorder(ctx, this, radiusOffset, spacing, circular);\n        ctx.restore();\n    }\n}\n\nfunction setStyle(ctx, options, style = options) {\n    ctx.lineCap = valueOrDefault(style.borderCapStyle, options.borderCapStyle);\n    ctx.setLineDash(valueOrDefault(style.borderDash, options.borderDash));\n    ctx.lineDashOffset = valueOrDefault(style.borderDashOffset, options.borderDashOffset);\n    ctx.lineJoin = valueOrDefault(style.borderJoinStyle, options.borderJoinStyle);\n    ctx.lineWidth = valueOrDefault(style.borderWidth, options.borderWidth);\n    ctx.strokeStyle = valueOrDefault(style.borderColor, options.borderColor);\n}\nfunction lineTo(ctx, previous, target) {\n    ctx.lineTo(target.x, target.y);\n}\n function getLineMethod(options) {\n    if (options.stepped) {\n        return _steppedLineTo;\n    }\n    if (options.tension || options.cubicInterpolationMode === 'monotone') {\n        return _bezierCurveTo;\n    }\n    return lineTo;\n}\nfunction pathVars(points, segment, params = {}) {\n    const count = points.length;\n    const { start: paramsStart = 0 , end: paramsEnd = count - 1  } = params;\n    const { start: segmentStart , end: segmentEnd  } = segment;\n    const start = Math.max(paramsStart, segmentStart);\n    const end = Math.min(paramsEnd, segmentEnd);\n    const outside = paramsStart < segmentStart && paramsEnd < segmentStart || paramsStart > segmentEnd && paramsEnd > segmentEnd;\n    return {\n        count,\n        start,\n        loop: segment.loop,\n        ilen: end < start && !outside ? count + end - start : end - start\n    };\n}\n function pathSegment(ctx, line, segment, params) {\n    const { points , options  } = line;\n    const { count , start , loop , ilen  } = pathVars(points, segment, params);\n    const lineMethod = getLineMethod(options);\n    let { move =true , reverse  } = params || {};\n    let i, point, prev;\n    for(i = 0; i <= ilen; ++i){\n        point = points[(start + (reverse ? ilen - i : i)) % count];\n        if (point.skip) {\n            continue;\n        } else if (move) {\n            ctx.moveTo(point.x, point.y);\n            move = false;\n        } else {\n            lineMethod(ctx, prev, point, reverse, options.stepped);\n        }\n        prev = point;\n    }\n    if (loop) {\n        point = points[(start + (reverse ? ilen : 0)) % count];\n        lineMethod(ctx, prev, point, reverse, options.stepped);\n    }\n    return !!loop;\n}\n function fastPathSegment(ctx, line, segment, params) {\n    const points = line.points;\n    const { count , start , ilen  } = pathVars(points, segment, params);\n    const { move =true , reverse  } = params || {};\n    let avgX = 0;\n    let countX = 0;\n    let i, point, prevX, minY, maxY, lastY;\n    const pointIndex = (index)=>(start + (reverse ? ilen - index : index)) % count;\n    const drawX = ()=>{\n        if (minY !== maxY) {\n            ctx.lineTo(avgX, maxY);\n            ctx.lineTo(avgX, minY);\n            ctx.lineTo(avgX, lastY);\n        }\n    };\n    if (move) {\n        point = points[pointIndex(0)];\n        ctx.moveTo(point.x, point.y);\n    }\n    for(i = 0; i <= ilen; ++i){\n        point = points[pointIndex(i)];\n        if (point.skip) {\n            continue;\n        }\n        const x = point.x;\n        const y = point.y;\n        const truncX = x | 0;\n        if (truncX === prevX) {\n            if (y < minY) {\n                minY = y;\n            } else if (y > maxY) {\n                maxY = y;\n            }\n            avgX = (countX * avgX + x) / ++countX;\n        } else {\n            drawX();\n            ctx.lineTo(x, y);\n            prevX = truncX;\n            countX = 0;\n            minY = maxY = y;\n        }\n        lastY = y;\n    }\n    drawX();\n}\n function _getSegmentMethod(line) {\n    const opts = line.options;\n    const borderDash = opts.borderDash && opts.borderDash.length;\n    const useFastPath = !line._decimated && !line._loop && !opts.tension && opts.cubicInterpolationMode !== 'monotone' && !opts.stepped && !borderDash;\n    return useFastPath ? fastPathSegment : pathSegment;\n}\n function _getInterpolationMethod(options) {\n    if (options.stepped) {\n        return _steppedInterpolation;\n    }\n    if (options.tension || options.cubicInterpolationMode === 'monotone') {\n        return _bezierInterpolation;\n    }\n    return _pointInLine;\n}\nfunction strokePathWithCache(ctx, line, start, count) {\n    let path = line._path;\n    if (!path) {\n        path = line._path = new Path2D();\n        if (line.path(path, start, count)) {\n            path.closePath();\n        }\n    }\n    setStyle(ctx, line.options);\n    ctx.stroke(path);\n}\nfunction strokePathDirect(ctx, line, start, count) {\n    const { segments , options  } = line;\n    const segmentMethod = _getSegmentMethod(line);\n    for (const segment of segments){\n        setStyle(ctx, options, segment.style);\n        ctx.beginPath();\n        if (segmentMethod(ctx, line, segment, {\n            start,\n            end: start + count - 1\n        })) {\n            ctx.closePath();\n        }\n        ctx.stroke();\n    }\n}\nconst usePath2D = typeof Path2D === 'function';\nfunction draw(ctx, line, start, count) {\n    if (usePath2D && !line.options.segment) {\n        strokePathWithCache(ctx, line, start, count);\n    } else {\n        strokePathDirect(ctx, line, start, count);\n    }\n}\nclass LineElement extends Element {\n    static id = 'line';\n static defaults = {\n        borderCapStyle: 'butt',\n        borderDash: [],\n        borderDashOffset: 0,\n        borderJoinStyle: 'miter',\n        borderWidth: 3,\n        capBezierPoints: true,\n        cubicInterpolationMode: 'default',\n        fill: false,\n        spanGaps: false,\n        stepped: false,\n        tension: 0\n    };\n static defaultRoutes = {\n        backgroundColor: 'backgroundColor',\n        borderColor: 'borderColor'\n    };\n    static descriptors = {\n        _scriptable: true,\n        _indexable: (name)=>name !== 'borderDash' && name !== 'fill'\n    };\n    constructor(cfg){\n        super();\n        this.animated = true;\n        this.options = undefined;\n        this._chart = undefined;\n        this._loop = undefined;\n        this._fullLoop = undefined;\n        this._path = undefined;\n        this._points = undefined;\n        this._segments = undefined;\n        this._decimated = false;\n        this._pointsUpdated = false;\n        this._datasetIndex = undefined;\n        if (cfg) {\n            Object.assign(this, cfg);\n        }\n    }\n    updateControlPoints(chartArea, indexAxis) {\n        const options = this.options;\n        if ((options.tension || options.cubicInterpolationMode === 'monotone') && !options.stepped && !this._pointsUpdated) {\n            const loop = options.spanGaps ? this._loop : this._fullLoop;\n            _updateBezierControlPoints(this._points, options, chartArea, loop, indexAxis);\n            this._pointsUpdated = true;\n        }\n    }\n    set points(points) {\n        this._points = points;\n        delete this._segments;\n        delete this._path;\n        this._pointsUpdated = false;\n    }\n    get points() {\n        return this._points;\n    }\n    get segments() {\n        return this._segments || (this._segments = _computeSegments(this, this.options.segment));\n    }\n first() {\n        const segments = this.segments;\n        const points = this.points;\n        return segments.length && points[segments[0].start];\n    }\n last() {\n        const segments = this.segments;\n        const points = this.points;\n        const count = segments.length;\n        return count && points[segments[count - 1].end];\n    }\n interpolate(point, property) {\n        const options = this.options;\n        const value = point[property];\n        const points = this.points;\n        const segments = _boundSegments(this, {\n            property,\n            start: value,\n            end: value\n        });\n        if (!segments.length) {\n            return;\n        }\n        const result = [];\n        const _interpolate = _getInterpolationMethod(options);\n        let i, ilen;\n        for(i = 0, ilen = segments.length; i < ilen; ++i){\n            const { start , end  } = segments[i];\n            const p1 = points[start];\n            const p2 = points[end];\n            if (p1 === p2) {\n                result.push(p1);\n                continue;\n            }\n            const t = Math.abs((value - p1[property]) / (p2[property] - p1[property]));\n            const interpolated = _interpolate(p1, p2, t, options.stepped);\n            interpolated[property] = point[property];\n            result.push(interpolated);\n        }\n        return result.length === 1 ? result[0] : result;\n    }\n pathSegment(ctx, segment, params) {\n        const segmentMethod = _getSegmentMethod(this);\n        return segmentMethod(ctx, this, segment, params);\n    }\n path(ctx, start, count) {\n        const segments = this.segments;\n        const segmentMethod = _getSegmentMethod(this);\n        let loop = this._loop;\n        start = start || 0;\n        count = count || this.points.length - start;\n        for (const segment of segments){\n            loop &= segmentMethod(ctx, this, segment, {\n                start,\n                end: start + count - 1\n            });\n        }\n        return !!loop;\n    }\n draw(ctx, chartArea, start, count) {\n        const options = this.options || {};\n        const points = this.points || [];\n        if (points.length && options.borderWidth) {\n            ctx.save();\n            draw(ctx, this, start, count);\n            ctx.restore();\n        }\n        if (this.animated) {\n            this._pointsUpdated = false;\n            this._path = undefined;\n        }\n    }\n}\n\nfunction inRange$1(el, pos, axis, useFinalPosition) {\n    const options = el.options;\n    const { [axis]: value  } = el.getProps([\n        axis\n    ], useFinalPosition);\n    return Math.abs(pos - value) < options.radius + options.hitRadius;\n}\nclass PointElement extends Element {\n    static id = 'point';\n    parsed;\n    skip;\n    stop;\n    /**\n   * @type {any}\n   */ static defaults = {\n        borderWidth: 1,\n        hitRadius: 1,\n        hoverBorderWidth: 1,\n        hoverRadius: 4,\n        pointStyle: 'circle',\n        radius: 3,\n        rotation: 0\n    };\n    /**\n   * @type {any}\n   */ static defaultRoutes = {\n        backgroundColor: 'backgroundColor',\n        borderColor: 'borderColor'\n    };\n    constructor(cfg){\n        super();\n        this.options = undefined;\n        this.parsed = undefined;\n        this.skip = undefined;\n        this.stop = undefined;\n        if (cfg) {\n            Object.assign(this, cfg);\n        }\n    }\n    inRange(mouseX, mouseY, useFinalPosition) {\n        const options = this.options;\n        const { x , y  } = this.getProps([\n            'x',\n            'y'\n        ], useFinalPosition);\n        return Math.pow(mouseX - x, 2) + Math.pow(mouseY - y, 2) < Math.pow(options.hitRadius + options.radius, 2);\n    }\n    inXRange(mouseX, useFinalPosition) {\n        return inRange$1(this, mouseX, 'x', useFinalPosition);\n    }\n    inYRange(mouseY, useFinalPosition) {\n        return inRange$1(this, mouseY, 'y', useFinalPosition);\n    }\n    getCenterPoint(useFinalPosition) {\n        const { x , y  } = this.getProps([\n            'x',\n            'y'\n        ], useFinalPosition);\n        return {\n            x,\n            y\n        };\n    }\n    size(options) {\n        options = options || this.options || {};\n        let radius = options.radius || 0;\n        radius = Math.max(radius, radius && options.hoverRadius || 0);\n        const borderWidth = radius && options.borderWidth || 0;\n        return (radius + borderWidth) * 2;\n    }\n    draw(ctx, area) {\n        const options = this.options;\n        if (this.skip || options.radius < 0.1 || !_isPointInArea(this, area, this.size(options) / 2)) {\n            return;\n        }\n        ctx.strokeStyle = options.borderColor;\n        ctx.lineWidth = options.borderWidth;\n        ctx.fillStyle = options.backgroundColor;\n        drawPoint(ctx, options, this.x, this.y);\n    }\n    getRange() {\n        const options = this.options || {};\n        // @ts-expect-error Fallbacks should never be hit in practice\n        return options.radius + options.hitRadius;\n    }\n}\n\nfunction getBarBounds(bar, useFinalPosition) {\n    const { x , y , base , width , height  } =  bar.getProps([\n        'x',\n        'y',\n        'base',\n        'width',\n        'height'\n    ], useFinalPosition);\n    let left, right, top, bottom, half;\n    if (bar.horizontal) {\n        half = height / 2;\n        left = Math.min(x, base);\n        right = Math.max(x, base);\n        top = y - half;\n        bottom = y + half;\n    } else {\n        half = width / 2;\n        left = x - half;\n        right = x + half;\n        top = Math.min(y, base);\n        bottom = Math.max(y, base);\n    }\n    return {\n        left,\n        top,\n        right,\n        bottom\n    };\n}\nfunction skipOrLimit(skip, value, min, max) {\n    return skip ? 0 : _limitValue(value, min, max);\n}\nfunction parseBorderWidth(bar, maxW, maxH) {\n    const value = bar.options.borderWidth;\n    const skip = bar.borderSkipped;\n    const o = toTRBL(value);\n    return {\n        t: skipOrLimit(skip.top, o.top, 0, maxH),\n        r: skipOrLimit(skip.right, o.right, 0, maxW),\n        b: skipOrLimit(skip.bottom, o.bottom, 0, maxH),\n        l: skipOrLimit(skip.left, o.left, 0, maxW)\n    };\n}\nfunction parseBorderRadius(bar, maxW, maxH) {\n    const { enableBorderRadius  } = bar.getProps([\n        'enableBorderRadius'\n    ]);\n    const value = bar.options.borderRadius;\n    const o = toTRBLCorners(value);\n    const maxR = Math.min(maxW, maxH);\n    const skip = bar.borderSkipped;\n    const enableBorder = enableBorderRadius || isObject(value);\n    return {\n        topLeft: skipOrLimit(!enableBorder || skip.top || skip.left, o.topLeft, 0, maxR),\n        topRight: skipOrLimit(!enableBorder || skip.top || skip.right, o.topRight, 0, maxR),\n        bottomLeft: skipOrLimit(!enableBorder || skip.bottom || skip.left, o.bottomLeft, 0, maxR),\n        bottomRight: skipOrLimit(!enableBorder || skip.bottom || skip.right, o.bottomRight, 0, maxR)\n    };\n}\nfunction boundingRects(bar) {\n    const bounds = getBarBounds(bar);\n    const width = bounds.right - bounds.left;\n    const height = bounds.bottom - bounds.top;\n    const border = parseBorderWidth(bar, width / 2, height / 2);\n    const radius = parseBorderRadius(bar, width / 2, height / 2);\n    return {\n        outer: {\n            x: bounds.left,\n            y: bounds.top,\n            w: width,\n            h: height,\n            radius\n        },\n        inner: {\n            x: bounds.left + border.l,\n            y: bounds.top + border.t,\n            w: width - border.l - border.r,\n            h: height - border.t - border.b,\n            radius: {\n                topLeft: Math.max(0, radius.topLeft - Math.max(border.t, border.l)),\n                topRight: Math.max(0, radius.topRight - Math.max(border.t, border.r)),\n                bottomLeft: Math.max(0, radius.bottomLeft - Math.max(border.b, border.l)),\n                bottomRight: Math.max(0, radius.bottomRight - Math.max(border.b, border.r))\n            }\n        }\n    };\n}\nfunction inRange(bar, x, y, useFinalPosition) {\n    const skipX = x === null;\n    const skipY = y === null;\n    const skipBoth = skipX && skipY;\n    const bounds = bar && !skipBoth && getBarBounds(bar, useFinalPosition);\n    return bounds && (skipX || _isBetween(x, bounds.left, bounds.right)) && (skipY || _isBetween(y, bounds.top, bounds.bottom));\n}\nfunction hasRadius(radius) {\n    return radius.topLeft || radius.topRight || radius.bottomLeft || radius.bottomRight;\n}\n function addNormalRectPath(ctx, rect) {\n    ctx.rect(rect.x, rect.y, rect.w, rect.h);\n}\nfunction inflateRect(rect, amount, refRect = {}) {\n    const x = rect.x !== refRect.x ? -amount : 0;\n    const y = rect.y !== refRect.y ? -amount : 0;\n    const w = (rect.x + rect.w !== refRect.x + refRect.w ? amount : 0) - x;\n    const h = (rect.y + rect.h !== refRect.y + refRect.h ? amount : 0) - y;\n    return {\n        x: rect.x + x,\n        y: rect.y + y,\n        w: rect.w + w,\n        h: rect.h + h,\n        radius: rect.radius\n    };\n}\nclass BarElement extends Element {\n    static id = 'bar';\n static defaults = {\n        borderSkipped: 'start',\n        borderWidth: 0,\n        borderRadius: 0,\n        inflateAmount: 'auto',\n        pointStyle: undefined\n    };\n static defaultRoutes = {\n        backgroundColor: 'backgroundColor',\n        borderColor: 'borderColor'\n    };\n    constructor(cfg){\n        super();\n        this.options = undefined;\n        this.horizontal = undefined;\n        this.base = undefined;\n        this.width = undefined;\n        this.height = undefined;\n        this.inflateAmount = undefined;\n        if (cfg) {\n            Object.assign(this, cfg);\n        }\n    }\n    draw(ctx) {\n        const { inflateAmount , options: { borderColor , backgroundColor  }  } = this;\n        const { inner , outer  } = boundingRects(this);\n        const addRectPath = hasRadius(outer.radius) ? addRoundedRectPath : addNormalRectPath;\n        ctx.save();\n        if (outer.w !== inner.w || outer.h !== inner.h) {\n            ctx.beginPath();\n            addRectPath(ctx, inflateRect(outer, inflateAmount, inner));\n            ctx.clip();\n            addRectPath(ctx, inflateRect(inner, -inflateAmount, outer));\n            ctx.fillStyle = borderColor;\n            ctx.fill('evenodd');\n        }\n        ctx.beginPath();\n        addRectPath(ctx, inflateRect(inner, inflateAmount));\n        ctx.fillStyle = backgroundColor;\n        ctx.fill();\n        ctx.restore();\n    }\n    inRange(mouseX, mouseY, useFinalPosition) {\n        return inRange(this, mouseX, mouseY, useFinalPosition);\n    }\n    inXRange(mouseX, useFinalPosition) {\n        return inRange(this, mouseX, null, useFinalPosition);\n    }\n    inYRange(mouseY, useFinalPosition) {\n        return inRange(this, null, mouseY, useFinalPosition);\n    }\n    getCenterPoint(useFinalPosition) {\n        const { x , y , base , horizontal  } =  this.getProps([\n            'x',\n            'y',\n            'base',\n            'horizontal'\n        ], useFinalPosition);\n        return {\n            x: horizontal ? (x + base) / 2 : x,\n            y: horizontal ? y : (y + base) / 2\n        };\n    }\n    getRange(axis) {\n        return axis === 'x' ? this.width / 2 : this.height / 2;\n    }\n}\n\nvar elements = /*#__PURE__*/Object.freeze({\n__proto__: null,\nArcElement: ArcElement,\nBarElement: BarElement,\nLineElement: LineElement,\nPointElement: PointElement\n});\n\nconst BORDER_COLORS = [\n    'rgb(54, 162, 235)',\n    'rgb(255, 99, 132)',\n    'rgb(255, 159, 64)',\n    'rgb(255, 205, 86)',\n    'rgb(75, 192, 192)',\n    'rgb(153, 102, 255)',\n    'rgb(201, 203, 207)' // grey\n];\n// Border colors with 50% transparency\nconst BACKGROUND_COLORS = /* #__PURE__ */ BORDER_COLORS.map((color)=>color.replace('rgb(', 'rgba(').replace(')', ', 0.5)'));\nfunction getBorderColor(i) {\n    return BORDER_COLORS[i % BORDER_COLORS.length];\n}\nfunction getBackgroundColor(i) {\n    return BACKGROUND_COLORS[i % BACKGROUND_COLORS.length];\n}\nfunction colorizeDefaultDataset(dataset, i) {\n    dataset.borderColor = getBorderColor(i);\n    dataset.backgroundColor = getBackgroundColor(i);\n    return ++i;\n}\nfunction colorizeDoughnutDataset(dataset, i) {\n    dataset.backgroundColor = dataset.data.map(()=>getBorderColor(i++));\n    return i;\n}\nfunction colorizePolarAreaDataset(dataset, i) {\n    dataset.backgroundColor = dataset.data.map(()=>getBackgroundColor(i++));\n    return i;\n}\nfunction getColorizer(chart) {\n    let i = 0;\n    return (dataset, datasetIndex)=>{\n        const controller = chart.getDatasetMeta(datasetIndex).controller;\n        if (controller instanceof DoughnutController) {\n            i = colorizeDoughnutDataset(dataset, i);\n        } else if (controller instanceof PolarAreaController) {\n            i = colorizePolarAreaDataset(dataset, i);\n        } else if (controller) {\n            i = colorizeDefaultDataset(dataset, i);\n        }\n    };\n}\nfunction containsColorsDefinitions(descriptors) {\n    let k;\n    for(k in descriptors){\n        if (descriptors[k].borderColor || descriptors[k].backgroundColor) {\n            return true;\n        }\n    }\n    return false;\n}\nfunction containsColorsDefinition(descriptor) {\n    return descriptor && (descriptor.borderColor || descriptor.backgroundColor);\n}\nvar plugin_colors = {\n    id: 'colors',\n    defaults: {\n        enabled: true,\n        forceOverride: false\n    },\n    beforeLayout (chart, _args, options) {\n        if (!options.enabled) {\n            return;\n        }\n        const { data: { datasets  } , options: chartOptions  } = chart.config;\n        const { elements  } = chartOptions;\n        if (!options.forceOverride && (containsColorsDefinitions(datasets) || containsColorsDefinition(chartOptions) || elements && containsColorsDefinitions(elements))) {\n            return;\n        }\n        const colorizer = getColorizer(chart);\n        datasets.forEach(colorizer);\n    }\n};\n\nfunction lttbDecimation(data, start, count, availableWidth, options) {\n const samples = options.samples || availableWidth;\n    if (samples >= count) {\n        return data.slice(start, start + count);\n    }\n    const decimated = [];\n    const bucketWidth = (count - 2) / (samples - 2);\n    let sampledIndex = 0;\n    const endIndex = start + count - 1;\n    let a = start;\n    let i, maxAreaPoint, maxArea, area, nextA;\n    decimated[sampledIndex++] = data[a];\n    for(i = 0; i < samples - 2; i++){\n        let avgX = 0;\n        let avgY = 0;\n        let j;\n        const avgRangeStart = Math.floor((i + 1) * bucketWidth) + 1 + start;\n        const avgRangeEnd = Math.min(Math.floor((i + 2) * bucketWidth) + 1, count) + start;\n        const avgRangeLength = avgRangeEnd - avgRangeStart;\n        for(j = avgRangeStart; j < avgRangeEnd; j++){\n            avgX += data[j].x;\n            avgY += data[j].y;\n        }\n        avgX /= avgRangeLength;\n        avgY /= avgRangeLength;\n        const rangeOffs = Math.floor(i * bucketWidth) + 1 + start;\n        const rangeTo = Math.min(Math.floor((i + 1) * bucketWidth) + 1, count) + start;\n        const { x: pointAx , y: pointAy  } = data[a];\n        maxArea = area = -1;\n        for(j = rangeOffs; j < rangeTo; j++){\n            area = 0.5 * Math.abs((pointAx - avgX) * (data[j].y - pointAy) - (pointAx - data[j].x) * (avgY - pointAy));\n            if (area > maxArea) {\n                maxArea = area;\n                maxAreaPoint = data[j];\n                nextA = j;\n            }\n        }\n        decimated[sampledIndex++] = maxAreaPoint;\n        a = nextA;\n    }\n    decimated[sampledIndex++] = data[endIndex];\n    return decimated;\n}\nfunction minMaxDecimation(data, start, count, availableWidth) {\n    let avgX = 0;\n    let countX = 0;\n    let i, point, x, y, prevX, minIndex, maxIndex, startIndex, minY, maxY;\n    const decimated = [];\n    const endIndex = start + count - 1;\n    const xMin = data[start].x;\n    const xMax = data[endIndex].x;\n    const dx = xMax - xMin;\n    for(i = start; i < start + count; ++i){\n        point = data[i];\n        x = (point.x - xMin) / dx * availableWidth;\n        y = point.y;\n        const truncX = x | 0;\n        if (truncX === prevX) {\n            if (y < minY) {\n                minY = y;\n                minIndex = i;\n            } else if (y > maxY) {\n                maxY = y;\n                maxIndex = i;\n            }\n            avgX = (countX * avgX + point.x) / ++countX;\n        } else {\n            const lastIndex = i - 1;\n            if (!isNullOrUndef(minIndex) && !isNullOrUndef(maxIndex)) {\n                const intermediateIndex1 = Math.min(minIndex, maxIndex);\n                const intermediateIndex2 = Math.max(minIndex, maxIndex);\n                if (intermediateIndex1 !== startIndex && intermediateIndex1 !== lastIndex) {\n                    decimated.push({\n                        ...data[intermediateIndex1],\n                        x: avgX\n                    });\n                }\n                if (intermediateIndex2 !== startIndex && intermediateIndex2 !== lastIndex) {\n                    decimated.push({\n                        ...data[intermediateIndex2],\n                        x: avgX\n                    });\n                }\n            }\n            if (i > 0 && lastIndex !== startIndex) {\n                decimated.push(data[lastIndex]);\n            }\n            decimated.push(point);\n            prevX = truncX;\n            countX = 0;\n            minY = maxY = y;\n            minIndex = maxIndex = startIndex = i;\n        }\n    }\n    return decimated;\n}\nfunction cleanDecimatedDataset(dataset) {\n    if (dataset._decimated) {\n        const data = dataset._data;\n        delete dataset._decimated;\n        delete dataset._data;\n        Object.defineProperty(dataset, 'data', {\n            configurable: true,\n            enumerable: true,\n            writable: true,\n            value: data\n        });\n    }\n}\nfunction cleanDecimatedData(chart) {\n    chart.data.datasets.forEach((dataset)=>{\n        cleanDecimatedDataset(dataset);\n    });\n}\nfunction getStartAndCountOfVisiblePointsSimplified(meta, points) {\n    const pointCount = points.length;\n    let start = 0;\n    let count;\n    const { iScale  } = meta;\n    const { min , max , minDefined , maxDefined  } = iScale.getUserBounds();\n    if (minDefined) {\n        start = _limitValue(_lookupByKey(points, iScale.axis, min).lo, 0, pointCount - 1);\n    }\n    if (maxDefined) {\n        count = _limitValue(_lookupByKey(points, iScale.axis, max).hi + 1, start, pointCount) - start;\n    } else {\n        count = pointCount - start;\n    }\n    return {\n        start,\n        count\n    };\n}\nvar plugin_decimation = {\n    id: 'decimation',\n    defaults: {\n        algorithm: 'min-max',\n        enabled: false\n    },\n    beforeElementsUpdate: (chart, args, options)=>{\n        if (!options.enabled) {\n            cleanDecimatedData(chart);\n            return;\n        }\n        const availableWidth = chart.width;\n        chart.data.datasets.forEach((dataset, datasetIndex)=>{\n            const { _data , indexAxis  } = dataset;\n            const meta = chart.getDatasetMeta(datasetIndex);\n            const data = _data || dataset.data;\n            if (resolve([\n                indexAxis,\n                chart.options.indexAxis\n            ]) === 'y') {\n                return;\n            }\n            if (!meta.controller.supportsDecimation) {\n                return;\n            }\n            const xAxis = chart.scales[meta.xAxisID];\n            if (xAxis.type !== 'linear' && xAxis.type !== 'time') {\n                return;\n            }\n            if (chart.options.parsing) {\n                return;\n            }\n            let { start , count  } = getStartAndCountOfVisiblePointsSimplified(meta, data);\n            const threshold = options.threshold || 4 * availableWidth;\n            if (count <= threshold) {\n                cleanDecimatedDataset(dataset);\n                return;\n            }\n            if (isNullOrUndef(_data)) {\n                dataset._data = data;\n                delete dataset.data;\n                Object.defineProperty(dataset, 'data', {\n                    configurable: true,\n                    enumerable: true,\n                    get: function() {\n                        return this._decimated;\n                    },\n                    set: function(d) {\n                        this._data = d;\n                    }\n                });\n            }\n            let decimated;\n            switch(options.algorithm){\n                case 'lttb':\n                    decimated = lttbDecimation(data, start, count, availableWidth, options);\n                    break;\n                case 'min-max':\n                    decimated = minMaxDecimation(data, start, count, availableWidth);\n                    break;\n                default:\n                    throw new Error(`Unsupported decimation algorithm '${options.algorithm}'`);\n            }\n            dataset._decimated = decimated;\n        });\n    },\n    destroy (chart) {\n        cleanDecimatedData(chart);\n    }\n};\n\nfunction _segments(line, target, property) {\n    const segments = line.segments;\n    const points = line.points;\n    const tpoints = target.points;\n    const parts = [];\n    for (const segment of segments){\n        let { start , end  } = segment;\n        end = _findSegmentEnd(start, end, points);\n        const bounds = _getBounds(property, points[start], points[end], segment.loop);\n        if (!target.segments) {\n            parts.push({\n                source: segment,\n                target: bounds,\n                start: points[start],\n                end: points[end]\n            });\n            continue;\n        }\n        const targetSegments = _boundSegments(target, bounds);\n        for (const tgt of targetSegments){\n            const subBounds = _getBounds(property, tpoints[tgt.start], tpoints[tgt.end], tgt.loop);\n            const fillSources = _boundSegment(segment, points, subBounds);\n            for (const fillSource of fillSources){\n                parts.push({\n                    source: fillSource,\n                    target: tgt,\n                    start: {\n                        [property]: _getEdge(bounds, subBounds, 'start', Math.max)\n                    },\n                    end: {\n                        [property]: _getEdge(bounds, subBounds, 'end', Math.min)\n                    }\n                });\n            }\n        }\n    }\n    return parts;\n}\nfunction _getBounds(property, first, last, loop) {\n    if (loop) {\n        return;\n    }\n    let start = first[property];\n    let end = last[property];\n    if (property === 'angle') {\n        start = _normalizeAngle(start);\n        end = _normalizeAngle(end);\n    }\n    return {\n        property,\n        start,\n        end\n    };\n}\nfunction _pointsFromSegments(boundary, line) {\n    const { x =null , y =null  } = boundary || {};\n    const linePoints = line.points;\n    const points = [];\n    line.segments.forEach(({ start , end  })=>{\n        end = _findSegmentEnd(start, end, linePoints);\n        const first = linePoints[start];\n        const last = linePoints[end];\n        if (y !== null) {\n            points.push({\n                x: first.x,\n                y\n            });\n            points.push({\n                x: last.x,\n                y\n            });\n        } else if (x !== null) {\n            points.push({\n                x,\n                y: first.y\n            });\n            points.push({\n                x,\n                y: last.y\n            });\n        }\n    });\n    return points;\n}\nfunction _findSegmentEnd(start, end, points) {\n    for(; end > start; end--){\n        const point = points[end];\n        if (!isNaN(point.x) && !isNaN(point.y)) {\n            break;\n        }\n    }\n    return end;\n}\nfunction _getEdge(a, b, prop, fn) {\n    if (a && b) {\n        return fn(a[prop], b[prop]);\n    }\n    return a ? a[prop] : b ? b[prop] : 0;\n}\n\nfunction _createBoundaryLine(boundary, line) {\n    let points = [];\n    let _loop = false;\n    if (isArray(boundary)) {\n        _loop = true;\n        points = boundary;\n    } else {\n        points = _pointsFromSegments(boundary, line);\n    }\n    return points.length ? new LineElement({\n        points,\n        options: {\n            tension: 0\n        },\n        _loop,\n        _fullLoop: _loop\n    }) : null;\n}\nfunction _shouldApplyFill(source) {\n    return source && source.fill !== false;\n}\n\nfunction _resolveTarget(sources, index, propagate) {\n    const source = sources[index];\n    let fill = source.fill;\n    const visited = [\n        index\n    ];\n    let target;\n    if (!propagate) {\n        return fill;\n    }\n    while(fill !== false && visited.indexOf(fill) === -1){\n        if (!isNumberFinite(fill)) {\n            return fill;\n        }\n        target = sources[fill];\n        if (!target) {\n            return false;\n        }\n        if (target.visible) {\n            return fill;\n        }\n        visited.push(fill);\n        fill = target.fill;\n    }\n    return false;\n}\n function _decodeFill(line, index, count) {\n     const fill = parseFillOption(line);\n    if (isObject(fill)) {\n        return isNaN(fill.value) ? false : fill;\n    }\n    let target = parseFloat(fill);\n    if (isNumberFinite(target) && Math.floor(target) === target) {\n        return decodeTargetIndex(fill[0], index, target, count);\n    }\n    return [\n        'origin',\n        'start',\n        'end',\n        'stack',\n        'shape'\n    ].indexOf(fill) >= 0 && fill;\n}\nfunction decodeTargetIndex(firstCh, index, target, count) {\n    if (firstCh === '-' || firstCh === '+') {\n        target = index + target;\n    }\n    if (target === index || target < 0 || target >= count) {\n        return false;\n    }\n    return target;\n}\n function _getTargetPixel(fill, scale) {\n    let pixel = null;\n    if (fill === 'start') {\n        pixel = scale.bottom;\n    } else if (fill === 'end') {\n        pixel = scale.top;\n    } else if (isObject(fill)) {\n        pixel = scale.getPixelForValue(fill.value);\n    } else if (scale.getBasePixel) {\n        pixel = scale.getBasePixel();\n    }\n    return pixel;\n}\n function _getTargetValue(fill, scale, startValue) {\n    let value;\n    if (fill === 'start') {\n        value = startValue;\n    } else if (fill === 'end') {\n        value = scale.options.reverse ? scale.min : scale.max;\n    } else if (isObject(fill)) {\n        value = fill.value;\n    } else {\n        value = scale.getBaseValue();\n    }\n    return value;\n}\n function parseFillOption(line) {\n    const options = line.options;\n    const fillOption = options.fill;\n    let fill = valueOrDefault(fillOption && fillOption.target, fillOption);\n    if (fill === undefined) {\n        fill = !!options.backgroundColor;\n    }\n    if (fill === false || fill === null) {\n        return false;\n    }\n    if (fill === true) {\n        return 'origin';\n    }\n    return fill;\n}\n\nfunction _buildStackLine(source) {\n    const { scale , index , line  } = source;\n    const points = [];\n    const segments = line.segments;\n    const sourcePoints = line.points;\n    const linesBelow = getLinesBelow(scale, index);\n    linesBelow.push(_createBoundaryLine({\n        x: null,\n        y: scale.bottom\n    }, line));\n    for(let i = 0; i < segments.length; i++){\n        const segment = segments[i];\n        for(let j = segment.start; j <= segment.end; j++){\n            addPointsBelow(points, sourcePoints[j], linesBelow);\n        }\n    }\n    return new LineElement({\n        points,\n        options: {}\n    });\n}\n function getLinesBelow(scale, index) {\n    const below = [];\n    const metas = scale.getMatchingVisibleMetas('line');\n    for(let i = 0; i < metas.length; i++){\n        const meta = metas[i];\n        if (meta.index === index) {\n            break;\n        }\n        if (!meta.hidden) {\n            below.unshift(meta.dataset);\n        }\n    }\n    return below;\n}\n function addPointsBelow(points, sourcePoint, linesBelow) {\n    const postponed = [];\n    for(let j = 0; j < linesBelow.length; j++){\n        const line = linesBelow[j];\n        const { first , last , point  } = findPoint(line, sourcePoint, 'x');\n        if (!point || first && last) {\n            continue;\n        }\n        if (first) {\n            postponed.unshift(point);\n        } else {\n            points.push(point);\n            if (!last) {\n                break;\n            }\n        }\n    }\n    points.push(...postponed);\n}\n function findPoint(line, sourcePoint, property) {\n    const point = line.interpolate(sourcePoint, property);\n    if (!point) {\n        return {};\n    }\n    const pointValue = point[property];\n    const segments = line.segments;\n    const linePoints = line.points;\n    let first = false;\n    let last = false;\n    for(let i = 0; i < segments.length; i++){\n        const segment = segments[i];\n        const firstValue = linePoints[segment.start][property];\n        const lastValue = linePoints[segment.end][property];\n        if (_isBetween(pointValue, firstValue, lastValue)) {\n            first = pointValue === firstValue;\n            last = pointValue === lastValue;\n            break;\n        }\n    }\n    return {\n        first,\n        last,\n        point\n    };\n}\n\nclass simpleArc {\n    constructor(opts){\n        this.x = opts.x;\n        this.y = opts.y;\n        this.radius = opts.radius;\n    }\n    pathSegment(ctx, bounds, opts) {\n        const { x , y , radius  } = this;\n        bounds = bounds || {\n            start: 0,\n            end: TAU\n        };\n        ctx.arc(x, y, radius, bounds.end, bounds.start, true);\n        return !opts.bounds;\n    }\n    interpolate(point) {\n        const { x , y , radius  } = this;\n        const angle = point.angle;\n        return {\n            x: x + Math.cos(angle) * radius,\n            y: y + Math.sin(angle) * radius,\n            angle\n        };\n    }\n}\n\nfunction _getTarget(source) {\n    const { chart , fill , line  } = source;\n    if (isNumberFinite(fill)) {\n        return getLineByIndex(chart, fill);\n    }\n    if (fill === 'stack') {\n        return _buildStackLine(source);\n    }\n    if (fill === 'shape') {\n        return true;\n    }\n    const boundary = computeBoundary(source);\n    if (boundary instanceof simpleArc) {\n        return boundary;\n    }\n    return _createBoundaryLine(boundary, line);\n}\n function getLineByIndex(chart, index) {\n    const meta = chart.getDatasetMeta(index);\n    const visible = meta && chart.isDatasetVisible(index);\n    return visible ? meta.dataset : null;\n}\nfunction computeBoundary(source) {\n    const scale = source.scale || {};\n    if (scale.getPointPositionForValue) {\n        return computeCircularBoundary(source);\n    }\n    return computeLinearBoundary(source);\n}\nfunction computeLinearBoundary(source) {\n    const { scale ={} , fill  } = source;\n    const pixel = _getTargetPixel(fill, scale);\n    if (isNumberFinite(pixel)) {\n        const horizontal = scale.isHorizontal();\n        return {\n            x: horizontal ? pixel : null,\n            y: horizontal ? null : pixel\n        };\n    }\n    return null;\n}\nfunction computeCircularBoundary(source) {\n    const { scale , fill  } = source;\n    const options = scale.options;\n    const length = scale.getLabels().length;\n    const start = options.reverse ? scale.max : scale.min;\n    const value = _getTargetValue(fill, scale, start);\n    const target = [];\n    if (options.grid.circular) {\n        const center = scale.getPointPositionForValue(0, start);\n        return new simpleArc({\n            x: center.x,\n            y: center.y,\n            radius: scale.getDistanceFromCenterForValue(value)\n        });\n    }\n    for(let i = 0; i < length; ++i){\n        target.push(scale.getPointPositionForValue(i, value));\n    }\n    return target;\n}\n\nfunction _drawfill(ctx, source, area) {\n    const target = _getTarget(source);\n    const { line , scale , axis  } = source;\n    const lineOpts = line.options;\n    const fillOption = lineOpts.fill;\n    const color = lineOpts.backgroundColor;\n    const { above =color , below =color  } = fillOption || {};\n    if (target && line.points.length) {\n        clipArea(ctx, area);\n        doFill(ctx, {\n            line,\n            target,\n            above,\n            below,\n            area,\n            scale,\n            axis\n        });\n        unclipArea(ctx);\n    }\n}\nfunction doFill(ctx, cfg) {\n    const { line , target , above , below , area , scale  } = cfg;\n    const property = line._loop ? 'angle' : cfg.axis;\n    ctx.save();\n    if (property === 'x' && below !== above) {\n        clipVertical(ctx, target, area.top);\n        fill(ctx, {\n            line,\n            target,\n            color: above,\n            scale,\n            property\n        });\n        ctx.restore();\n        ctx.save();\n        clipVertical(ctx, target, area.bottom);\n    }\n    fill(ctx, {\n        line,\n        target,\n        color: below,\n        scale,\n        property\n    });\n    ctx.restore();\n}\nfunction clipVertical(ctx, target, clipY) {\n    const { segments , points  } = target;\n    let first = true;\n    let lineLoop = false;\n    ctx.beginPath();\n    for (const segment of segments){\n        const { start , end  } = segment;\n        const firstPoint = points[start];\n        const lastPoint = points[_findSegmentEnd(start, end, points)];\n        if (first) {\n            ctx.moveTo(firstPoint.x, firstPoint.y);\n            first = false;\n        } else {\n            ctx.lineTo(firstPoint.x, clipY);\n            ctx.lineTo(firstPoint.x, firstPoint.y);\n        }\n        lineLoop = !!target.pathSegment(ctx, segment, {\n            move: lineLoop\n        });\n        if (lineLoop) {\n            ctx.closePath();\n        } else {\n            ctx.lineTo(lastPoint.x, clipY);\n        }\n    }\n    ctx.lineTo(target.first().x, clipY);\n    ctx.closePath();\n    ctx.clip();\n}\nfunction fill(ctx, cfg) {\n    const { line , target , property , color , scale  } = cfg;\n    const segments = _segments(line, target, property);\n    for (const { source: src , target: tgt , start , end  } of segments){\n        const { style: { backgroundColor =color  } = {}  } = src;\n        const notShape = target !== true;\n        ctx.save();\n        ctx.fillStyle = backgroundColor;\n        clipBounds(ctx, scale, notShape && _getBounds(property, start, end));\n        ctx.beginPath();\n        const lineLoop = !!line.pathSegment(ctx, src);\n        let loop;\n        if (notShape) {\n            if (lineLoop) {\n                ctx.closePath();\n            } else {\n                interpolatedLineTo(ctx, target, end, property);\n            }\n            const targetLoop = !!target.pathSegment(ctx, tgt, {\n                move: lineLoop,\n                reverse: true\n            });\n            loop = lineLoop && targetLoop;\n            if (!loop) {\n                interpolatedLineTo(ctx, target, start, property);\n            }\n        }\n        ctx.closePath();\n        ctx.fill(loop ? 'evenodd' : 'nonzero');\n        ctx.restore();\n    }\n}\nfunction clipBounds(ctx, scale, bounds) {\n    const { top , bottom  } = scale.chart.chartArea;\n    const { property , start , end  } = bounds || {};\n    if (property === 'x') {\n        ctx.beginPath();\n        ctx.rect(start, top, end - start, bottom - top);\n        ctx.clip();\n    }\n}\nfunction interpolatedLineTo(ctx, target, point, property) {\n    const interpolatedPoint = target.interpolate(point, property);\n    if (interpolatedPoint) {\n        ctx.lineTo(interpolatedPoint.x, interpolatedPoint.y);\n    }\n}\n\nvar index = {\n    id: 'filler',\n    afterDatasetsUpdate (chart, _args, options) {\n        const count = (chart.data.datasets || []).length;\n        const sources = [];\n        let meta, i, line, source;\n        for(i = 0; i < count; ++i){\n            meta = chart.getDatasetMeta(i);\n            line = meta.dataset;\n            source = null;\n            if (line && line.options && line instanceof LineElement) {\n                source = {\n                    visible: chart.isDatasetVisible(i),\n                    index: i,\n                    fill: _decodeFill(line, i, count),\n                    chart,\n                    axis: meta.controller.options.indexAxis,\n                    scale: meta.vScale,\n                    line\n                };\n            }\n            meta.$filler = source;\n            sources.push(source);\n        }\n        for(i = 0; i < count; ++i){\n            source = sources[i];\n            if (!source || source.fill === false) {\n                continue;\n            }\n            source.fill = _resolveTarget(sources, i, options.propagate);\n        }\n    },\n    beforeDraw (chart, _args, options) {\n        const draw = options.drawTime === 'beforeDraw';\n        const metasets = chart.getSortedVisibleDatasetMetas();\n        const area = chart.chartArea;\n        for(let i = metasets.length - 1; i >= 0; --i){\n            const source = metasets[i].$filler;\n            if (!source) {\n                continue;\n            }\n            source.line.updateControlPoints(area, source.axis);\n            if (draw && source.fill) {\n                _drawfill(chart.ctx, source, area);\n            }\n        }\n    },\n    beforeDatasetsDraw (chart, _args, options) {\n        if (options.drawTime !== 'beforeDatasetsDraw') {\n            return;\n        }\n        const metasets = chart.getSortedVisibleDatasetMetas();\n        for(let i = metasets.length - 1; i >= 0; --i){\n            const source = metasets[i].$filler;\n            if (_shouldApplyFill(source)) {\n                _drawfill(chart.ctx, source, chart.chartArea);\n            }\n        }\n    },\n    beforeDatasetDraw (chart, args, options) {\n        const source = args.meta.$filler;\n        if (!_shouldApplyFill(source) || options.drawTime !== 'beforeDatasetDraw') {\n            return;\n        }\n        _drawfill(chart.ctx, source, chart.chartArea);\n    },\n    defaults: {\n        propagate: true,\n        drawTime: 'beforeDatasetDraw'\n    }\n};\n\nconst getBoxSize = (labelOpts, fontSize)=>{\n    let { boxHeight =fontSize , boxWidth =fontSize  } = labelOpts;\n    if (labelOpts.usePointStyle) {\n        boxHeight = Math.min(boxHeight, fontSize);\n        boxWidth = labelOpts.pointStyleWidth || Math.min(boxWidth, fontSize);\n    }\n    return {\n        boxWidth,\n        boxHeight,\n        itemHeight: Math.max(fontSize, boxHeight)\n    };\n};\nconst itemsEqual = (a, b)=>a !== null && b !== null && a.datasetIndex === b.datasetIndex && a.index === b.index;\nclass Legend extends Element {\n constructor(config){\n        super();\n        this._added = false;\n        this.legendHitBoxes = [];\n this._hoveredItem = null;\n        this.doughnutMode = false;\n        this.chart = config.chart;\n        this.options = config.options;\n        this.ctx = config.ctx;\n        this.legendItems = undefined;\n        this.columnSizes = undefined;\n        this.lineWidths = undefined;\n        this.maxHeight = undefined;\n        this.maxWidth = undefined;\n        this.top = undefined;\n        this.bottom = undefined;\n        this.left = undefined;\n        this.right = undefined;\n        this.height = undefined;\n        this.width = undefined;\n        this._margins = undefined;\n        this.position = undefined;\n        this.weight = undefined;\n        this.fullSize = undefined;\n    }\n    update(maxWidth, maxHeight, margins) {\n        this.maxWidth = maxWidth;\n        this.maxHeight = maxHeight;\n        this._margins = margins;\n        this.setDimensions();\n        this.buildLabels();\n        this.fit();\n    }\n    setDimensions() {\n        if (this.isHorizontal()) {\n            this.width = this.maxWidth;\n            this.left = this._margins.left;\n            this.right = this.width;\n        } else {\n            this.height = this.maxHeight;\n            this.top = this._margins.top;\n            this.bottom = this.height;\n        }\n    }\n    buildLabels() {\n        const labelOpts = this.options.labels || {};\n        let legendItems = callback(labelOpts.generateLabels, [\n            this.chart\n        ], this) || [];\n        if (labelOpts.filter) {\n            legendItems = legendItems.filter((item)=>labelOpts.filter(item, this.chart.data));\n        }\n        if (labelOpts.sort) {\n            legendItems = legendItems.sort((a, b)=>labelOpts.sort(a, b, this.chart.data));\n        }\n        if (this.options.reverse) {\n            legendItems.reverse();\n        }\n        this.legendItems = legendItems;\n    }\n    fit() {\n        const { options , ctx  } = this;\n        if (!options.display) {\n            this.width = this.height = 0;\n            return;\n        }\n        const labelOpts = options.labels;\n        const labelFont = toFont(labelOpts.font);\n        const fontSize = labelFont.size;\n        const titleHeight = this._computeTitleHeight();\n        const { boxWidth , itemHeight  } = getBoxSize(labelOpts, fontSize);\n        let width, height;\n        ctx.font = labelFont.string;\n        if (this.isHorizontal()) {\n            width = this.maxWidth;\n            height = this._fitRows(titleHeight, fontSize, boxWidth, itemHeight) + 10;\n        } else {\n            height = this.maxHeight;\n            width = this._fitCols(titleHeight, labelFont, boxWidth, itemHeight) + 10;\n        }\n        this.width = Math.min(width, options.maxWidth || this.maxWidth);\n        this.height = Math.min(height, options.maxHeight || this.maxHeight);\n    }\n _fitRows(titleHeight, fontSize, boxWidth, itemHeight) {\n        const { ctx , maxWidth , options: { labels: { padding  }  }  } = this;\n        const hitboxes = this.legendHitBoxes = [];\n        const lineWidths = this.lineWidths = [\n            0\n        ];\n        const lineHeight = itemHeight + padding;\n        let totalHeight = titleHeight;\n        ctx.textAlign = 'left';\n        ctx.textBaseline = 'middle';\n        let row = -1;\n        let top = -lineHeight;\n        this.legendItems.forEach((legendItem, i)=>{\n            const itemWidth = boxWidth + fontSize / 2 + ctx.measureText(legendItem.text).width;\n            if (i === 0 || lineWidths[lineWidths.length - 1] + itemWidth + 2 * padding > maxWidth) {\n                totalHeight += lineHeight;\n                lineWidths[lineWidths.length - (i > 0 ? 0 : 1)] = 0;\n                top += lineHeight;\n                row++;\n            }\n            hitboxes[i] = {\n                left: 0,\n                top,\n                row,\n                width: itemWidth,\n                height: itemHeight\n            };\n            lineWidths[lineWidths.length - 1] += itemWidth + padding;\n        });\n        return totalHeight;\n    }\n    _fitCols(titleHeight, labelFont, boxWidth, _itemHeight) {\n        const { ctx , maxHeight , options: { labels: { padding  }  }  } = this;\n        const hitboxes = this.legendHitBoxes = [];\n        const columnSizes = this.columnSizes = [];\n        const heightLimit = maxHeight - titleHeight;\n        let totalWidth = padding;\n        let currentColWidth = 0;\n        let currentColHeight = 0;\n        let left = 0;\n        let col = 0;\n        this.legendItems.forEach((legendItem, i)=>{\n            const { itemWidth , itemHeight  } = calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight);\n            if (i > 0 && currentColHeight + itemHeight + 2 * padding > heightLimit) {\n                totalWidth += currentColWidth + padding;\n                columnSizes.push({\n                    width: currentColWidth,\n                    height: currentColHeight\n                });\n                left += currentColWidth + padding;\n                col++;\n                currentColWidth = currentColHeight = 0;\n            }\n            hitboxes[i] = {\n                left,\n                top: currentColHeight,\n                col,\n                width: itemWidth,\n                height: itemHeight\n            };\n            currentColWidth = Math.max(currentColWidth, itemWidth);\n            currentColHeight += itemHeight + padding;\n        });\n        totalWidth += currentColWidth;\n        columnSizes.push({\n            width: currentColWidth,\n            height: currentColHeight\n        });\n        return totalWidth;\n    }\n    adjustHitBoxes() {\n        if (!this.options.display) {\n            return;\n        }\n        const titleHeight = this._computeTitleHeight();\n        const { legendHitBoxes: hitboxes , options: { align , labels: { padding  } , rtl  }  } = this;\n        const rtlHelper = getRtlAdapter(rtl, this.left, this.width);\n        if (this.isHorizontal()) {\n            let row = 0;\n            let left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);\n            for (const hitbox of hitboxes){\n                if (row !== hitbox.row) {\n                    row = hitbox.row;\n                    left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);\n                }\n                hitbox.top += this.top + titleHeight + padding;\n                hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(left), hitbox.width);\n                left += hitbox.width + padding;\n            }\n        } else {\n            let col = 0;\n            let top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);\n            for (const hitbox of hitboxes){\n                if (hitbox.col !== col) {\n                    col = hitbox.col;\n                    top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);\n                }\n                hitbox.top = top;\n                hitbox.left += this.left + padding;\n                hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(hitbox.left), hitbox.width);\n                top += hitbox.height + padding;\n            }\n        }\n    }\n    isHorizontal() {\n        return this.options.position === 'top' || this.options.position === 'bottom';\n    }\n    draw() {\n        if (this.options.display) {\n            const ctx = this.ctx;\n            clipArea(ctx, this);\n            this._draw();\n            unclipArea(ctx);\n        }\n    }\n _draw() {\n        const { options: opts , columnSizes , lineWidths , ctx  } = this;\n        const { align , labels: labelOpts  } = opts;\n        const defaultColor = defaults.color;\n        const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);\n        const labelFont = toFont(labelOpts.font);\n        const { padding  } = labelOpts;\n        const fontSize = labelFont.size;\n        const halfFontSize = fontSize / 2;\n        let cursor;\n        this.drawTitle();\n        ctx.textAlign = rtlHelper.textAlign('left');\n        ctx.textBaseline = 'middle';\n        ctx.lineWidth = 0.5;\n        ctx.font = labelFont.string;\n        const { boxWidth , boxHeight , itemHeight  } = getBoxSize(labelOpts, fontSize);\n        const drawLegendBox = function(x, y, legendItem) {\n            if (isNaN(boxWidth) || boxWidth <= 0 || isNaN(boxHeight) || boxHeight < 0) {\n                return;\n            }\n            ctx.save();\n            const lineWidth = valueOrDefault(legendItem.lineWidth, 1);\n            ctx.fillStyle = valueOrDefault(legendItem.fillStyle, defaultColor);\n            ctx.lineCap = valueOrDefault(legendItem.lineCap, 'butt');\n            ctx.lineDashOffset = valueOrDefault(legendItem.lineDashOffset, 0);\n            ctx.lineJoin = valueOrDefault(legendItem.lineJoin, 'miter');\n            ctx.lineWidth = lineWidth;\n            ctx.strokeStyle = valueOrDefault(legendItem.strokeStyle, defaultColor);\n            ctx.setLineDash(valueOrDefault(legendItem.lineDash, []));\n            if (labelOpts.usePointStyle) {\n                const drawOptions = {\n                    radius: boxHeight * Math.SQRT2 / 2,\n                    pointStyle: legendItem.pointStyle,\n                    rotation: legendItem.rotation,\n                    borderWidth: lineWidth\n                };\n                const centerX = rtlHelper.xPlus(x, boxWidth / 2);\n                const centerY = y + halfFontSize;\n                drawPointLegend(ctx, drawOptions, centerX, centerY, labelOpts.pointStyleWidth && boxWidth);\n            } else {\n                const yBoxTop = y + Math.max((fontSize - boxHeight) / 2, 0);\n                const xBoxLeft = rtlHelper.leftForLtr(x, boxWidth);\n                const borderRadius = toTRBLCorners(legendItem.borderRadius);\n                ctx.beginPath();\n                if (Object.values(borderRadius).some((v)=>v !== 0)) {\n                    addRoundedRectPath(ctx, {\n                        x: xBoxLeft,\n                        y: yBoxTop,\n                        w: boxWidth,\n                        h: boxHeight,\n                        radius: borderRadius\n                    });\n                } else {\n                    ctx.rect(xBoxLeft, yBoxTop, boxWidth, boxHeight);\n                }\n                ctx.fill();\n                if (lineWidth !== 0) {\n                    ctx.stroke();\n                }\n            }\n            ctx.restore();\n        };\n        const fillText = function(x, y, legendItem) {\n            renderText(ctx, legendItem.text, x, y + itemHeight / 2, labelFont, {\n                strikethrough: legendItem.hidden,\n                textAlign: rtlHelper.textAlign(legendItem.textAlign)\n            });\n        };\n        const isHorizontal = this.isHorizontal();\n        const titleHeight = this._computeTitleHeight();\n        if (isHorizontal) {\n            cursor = {\n                x: _alignStartEnd(align, this.left + padding, this.right - lineWidths[0]),\n                y: this.top + padding + titleHeight,\n                line: 0\n            };\n        } else {\n            cursor = {\n                x: this.left + padding,\n                y: _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[0].height),\n                line: 0\n            };\n        }\n        overrideTextDirection(this.ctx, opts.textDirection);\n        const lineHeight = itemHeight + padding;\n        this.legendItems.forEach((legendItem, i)=>{\n            ctx.strokeStyle = legendItem.fontColor;\n            ctx.fillStyle = legendItem.fontColor;\n            const textWidth = ctx.measureText(legendItem.text).width;\n            const textAlign = rtlHelper.textAlign(legendItem.textAlign || (legendItem.textAlign = labelOpts.textAlign));\n            const width = boxWidth + halfFontSize + textWidth;\n            let x = cursor.x;\n            let y = cursor.y;\n            rtlHelper.setWidth(this.width);\n            if (isHorizontal) {\n                if (i > 0 && x + width + padding > this.right) {\n                    y = cursor.y += lineHeight;\n                    cursor.line++;\n                    x = cursor.x = _alignStartEnd(align, this.left + padding, this.right - lineWidths[cursor.line]);\n                }\n            } else if (i > 0 && y + lineHeight > this.bottom) {\n                x = cursor.x = x + columnSizes[cursor.line].width + padding;\n                cursor.line++;\n                y = cursor.y = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[cursor.line].height);\n            }\n            const realX = rtlHelper.x(x);\n            drawLegendBox(realX, y, legendItem);\n            x = _textX(textAlign, x + boxWidth + halfFontSize, isHorizontal ? x + width : this.right, opts.rtl);\n            fillText(rtlHelper.x(x), y, legendItem);\n            if (isHorizontal) {\n                cursor.x += width + padding;\n            } else if (typeof legendItem.text !== 'string') {\n                const fontLineHeight = labelFont.lineHeight;\n                cursor.y += calculateLegendItemHeight(legendItem, fontLineHeight) + padding;\n            } else {\n                cursor.y += lineHeight;\n            }\n        });\n        restoreTextDirection(this.ctx, opts.textDirection);\n    }\n drawTitle() {\n        const opts = this.options;\n        const titleOpts = opts.title;\n        const titleFont = toFont(titleOpts.font);\n        const titlePadding = toPadding(titleOpts.padding);\n        if (!titleOpts.display) {\n            return;\n        }\n        const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);\n        const ctx = this.ctx;\n        const position = titleOpts.position;\n        const halfFontSize = titleFont.size / 2;\n        const topPaddingPlusHalfFontSize = titlePadding.top + halfFontSize;\n        let y;\n        let left = this.left;\n        let maxWidth = this.width;\n        if (this.isHorizontal()) {\n            maxWidth = Math.max(...this.lineWidths);\n            y = this.top + topPaddingPlusHalfFontSize;\n            left = _alignStartEnd(opts.align, left, this.right - maxWidth);\n        } else {\n            const maxHeight = this.columnSizes.reduce((acc, size)=>Math.max(acc, size.height), 0);\n            y = topPaddingPlusHalfFontSize + _alignStartEnd(opts.align, this.top, this.bottom - maxHeight - opts.labels.padding - this._computeTitleHeight());\n        }\n        const x = _alignStartEnd(position, left, left + maxWidth);\n        ctx.textAlign = rtlHelper.textAlign(_toLeftRightCenter(position));\n        ctx.textBaseline = 'middle';\n        ctx.strokeStyle = titleOpts.color;\n        ctx.fillStyle = titleOpts.color;\n        ctx.font = titleFont.string;\n        renderText(ctx, titleOpts.text, x, y, titleFont);\n    }\n _computeTitleHeight() {\n        const titleOpts = this.options.title;\n        const titleFont = toFont(titleOpts.font);\n        const titlePadding = toPadding(titleOpts.padding);\n        return titleOpts.display ? titleFont.lineHeight + titlePadding.height : 0;\n    }\n _getLegendItemAt(x, y) {\n        let i, hitBox, lh;\n        if (_isBetween(x, this.left, this.right) && _isBetween(y, this.top, this.bottom)) {\n            lh = this.legendHitBoxes;\n            for(i = 0; i < lh.length; ++i){\n                hitBox = lh[i];\n                if (_isBetween(x, hitBox.left, hitBox.left + hitBox.width) && _isBetween(y, hitBox.top, hitBox.top + hitBox.height)) {\n                    return this.legendItems[i];\n                }\n            }\n        }\n        return null;\n    }\n handleEvent(e) {\n        const opts = this.options;\n        if (!isListened(e.type, opts)) {\n            return;\n        }\n        const hoveredItem = this._getLegendItemAt(e.x, e.y);\n        if (e.type === 'mousemove' || e.type === 'mouseout') {\n            const previous = this._hoveredItem;\n            const sameItem = itemsEqual(previous, hoveredItem);\n            if (previous && !sameItem) {\n                callback(opts.onLeave, [\n                    e,\n                    previous,\n                    this\n                ], this);\n            }\n            this._hoveredItem = hoveredItem;\n            if (hoveredItem && !sameItem) {\n                callback(opts.onHover, [\n                    e,\n                    hoveredItem,\n                    this\n                ], this);\n            }\n        } else if (hoveredItem) {\n            callback(opts.onClick, [\n                e,\n                hoveredItem,\n                this\n            ], this);\n        }\n    }\n}\nfunction calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight) {\n    const itemWidth = calculateItemWidth(legendItem, boxWidth, labelFont, ctx);\n    const itemHeight = calculateItemHeight(_itemHeight, legendItem, labelFont.lineHeight);\n    return {\n        itemWidth,\n        itemHeight\n    };\n}\nfunction calculateItemWidth(legendItem, boxWidth, labelFont, ctx) {\n    let legendItemText = legendItem.text;\n    if (legendItemText && typeof legendItemText !== 'string') {\n        legendItemText = legendItemText.reduce((a, b)=>a.length > b.length ? a : b);\n    }\n    return boxWidth + labelFont.size / 2 + ctx.measureText(legendItemText).width;\n}\nfunction calculateItemHeight(_itemHeight, legendItem, fontLineHeight) {\n    let itemHeight = _itemHeight;\n    if (typeof legendItem.text !== 'string') {\n        itemHeight = calculateLegendItemHeight(legendItem, fontLineHeight);\n    }\n    return itemHeight;\n}\nfunction calculateLegendItemHeight(legendItem, fontLineHeight) {\n    const labelHeight = legendItem.text ? legendItem.text.length : 0;\n    return fontLineHeight * labelHeight;\n}\nfunction isListened(type, opts) {\n    if ((type === 'mousemove' || type === 'mouseout') && (opts.onHover || opts.onLeave)) {\n        return true;\n    }\n    if (opts.onClick && (type === 'click' || type === 'mouseup')) {\n        return true;\n    }\n    return false;\n}\nvar plugin_legend = {\n    id: 'legend',\n _element: Legend,\n    start (chart, _args, options) {\n        const legend = chart.legend = new Legend({\n            ctx: chart.ctx,\n            options,\n            chart\n        });\n        layouts.configure(chart, legend, options);\n        layouts.addBox(chart, legend);\n    },\n    stop (chart) {\n        layouts.removeBox(chart, chart.legend);\n        delete chart.legend;\n    },\n    beforeUpdate (chart, _args, options) {\n        const legend = chart.legend;\n        layouts.configure(chart, legend, options);\n        legend.options = options;\n    },\n    afterUpdate (chart) {\n        const legend = chart.legend;\n        legend.buildLabels();\n        legend.adjustHitBoxes();\n    },\n    afterEvent (chart, args) {\n        if (!args.replay) {\n            chart.legend.handleEvent(args.event);\n        }\n    },\n    defaults: {\n        display: true,\n        position: 'top',\n        align: 'center',\n        fullSize: true,\n        reverse: false,\n        weight: 1000,\n        onClick (e, legendItem, legend) {\n            const index = legendItem.datasetIndex;\n            const ci = legend.chart;\n            if (ci.isDatasetVisible(index)) {\n                ci.hide(index);\n                legendItem.hidden = true;\n            } else {\n                ci.show(index);\n                legendItem.hidden = false;\n            }\n        },\n        onHover: null,\n        onLeave: null,\n        labels: {\n            color: (ctx)=>ctx.chart.options.color,\n            boxWidth: 40,\n            padding: 10,\n            generateLabels (chart) {\n                const datasets = chart.data.datasets;\n                const { labels: { usePointStyle , pointStyle , textAlign , color , useBorderRadius , borderRadius  }  } = chart.legend.options;\n                return chart._getSortedDatasetMetas().map((meta)=>{\n                    const style = meta.controller.getStyle(usePointStyle ? 0 : undefined);\n                    const borderWidth = toPadding(style.borderWidth);\n                    return {\n                        text: datasets[meta.index].label,\n                        fillStyle: style.backgroundColor,\n                        fontColor: color,\n                        hidden: !meta.visible,\n                        lineCap: style.borderCapStyle,\n                        lineDash: style.borderDash,\n                        lineDashOffset: style.borderDashOffset,\n                        lineJoin: style.borderJoinStyle,\n                        lineWidth: (borderWidth.width + borderWidth.height) / 4,\n                        strokeStyle: style.borderColor,\n                        pointStyle: pointStyle || style.pointStyle,\n                        rotation: style.rotation,\n                        textAlign: textAlign || style.textAlign,\n                        borderRadius: useBorderRadius && (borderRadius || style.borderRadius),\n                        datasetIndex: meta.index\n                    };\n                }, this);\n            }\n        },\n        title: {\n            color: (ctx)=>ctx.chart.options.color,\n            display: false,\n            position: 'center',\n            text: ''\n        }\n    },\n    descriptors: {\n        _scriptable: (name)=>!name.startsWith('on'),\n        labels: {\n            _scriptable: (name)=>![\n                    'generateLabels',\n                    'filter',\n                    'sort'\n                ].includes(name)\n        }\n    }\n};\n\nclass Title extends Element {\n constructor(config){\n        super();\n        this.chart = config.chart;\n        this.options = config.options;\n        this.ctx = config.ctx;\n        this._padding = undefined;\n        this.top = undefined;\n        this.bottom = undefined;\n        this.left = undefined;\n        this.right = undefined;\n        this.width = undefined;\n        this.height = undefined;\n        this.position = undefined;\n        this.weight = undefined;\n        this.fullSize = undefined;\n    }\n    update(maxWidth, maxHeight) {\n        const opts = this.options;\n        this.left = 0;\n        this.top = 0;\n        if (!opts.display) {\n            this.width = this.height = this.right = this.bottom = 0;\n            return;\n        }\n        this.width = this.right = maxWidth;\n        this.height = this.bottom = maxHeight;\n        const lineCount = isArray(opts.text) ? opts.text.length : 1;\n        this._padding = toPadding(opts.padding);\n        const textSize = lineCount * toFont(opts.font).lineHeight + this._padding.height;\n        if (this.isHorizontal()) {\n            this.height = textSize;\n        } else {\n            this.width = textSize;\n        }\n    }\n    isHorizontal() {\n        const pos = this.options.position;\n        return pos === 'top' || pos === 'bottom';\n    }\n    _drawArgs(offset) {\n        const { top , left , bottom , right , options  } = this;\n        const align = options.align;\n        let rotation = 0;\n        let maxWidth, titleX, titleY;\n        if (this.isHorizontal()) {\n            titleX = _alignStartEnd(align, left, right);\n            titleY = top + offset;\n            maxWidth = right - left;\n        } else {\n            if (options.position === 'left') {\n                titleX = left + offset;\n                titleY = _alignStartEnd(align, bottom, top);\n                rotation = PI * -0.5;\n            } else {\n                titleX = right - offset;\n                titleY = _alignStartEnd(align, top, bottom);\n                rotation = PI * 0.5;\n            }\n            maxWidth = bottom - top;\n        }\n        return {\n            titleX,\n            titleY,\n            maxWidth,\n            rotation\n        };\n    }\n    draw() {\n        const ctx = this.ctx;\n        const opts = this.options;\n        if (!opts.display) {\n            return;\n        }\n        const fontOpts = toFont(opts.font);\n        const lineHeight = fontOpts.lineHeight;\n        const offset = lineHeight / 2 + this._padding.top;\n        const { titleX , titleY , maxWidth , rotation  } = this._drawArgs(offset);\n        renderText(ctx, opts.text, 0, 0, fontOpts, {\n            color: opts.color,\n            maxWidth,\n            rotation,\n            textAlign: _toLeftRightCenter(opts.align),\n            textBaseline: 'middle',\n            translation: [\n                titleX,\n                titleY\n            ]\n        });\n    }\n}\nfunction createTitle(chart, titleOpts) {\n    const title = new Title({\n        ctx: chart.ctx,\n        options: titleOpts,\n        chart\n    });\n    layouts.configure(chart, title, titleOpts);\n    layouts.addBox(chart, title);\n    chart.titleBlock = title;\n}\nvar plugin_title = {\n    id: 'title',\n _element: Title,\n    start (chart, _args, options) {\n        createTitle(chart, options);\n    },\n    stop (chart) {\n        const titleBlock = chart.titleBlock;\n        layouts.removeBox(chart, titleBlock);\n        delete chart.titleBlock;\n    },\n    beforeUpdate (chart, _args, options) {\n        const title = chart.titleBlock;\n        layouts.configure(chart, title, options);\n        title.options = options;\n    },\n    defaults: {\n        align: 'center',\n        display: false,\n        font: {\n            weight: 'bold'\n        },\n        fullSize: true,\n        padding: 10,\n        position: 'top',\n        text: '',\n        weight: 2000\n    },\n    defaultRoutes: {\n        color: 'color'\n    },\n    descriptors: {\n        _scriptable: true,\n        _indexable: false\n    }\n};\n\nconst map = new WeakMap();\nvar plugin_subtitle = {\n    id: 'subtitle',\n    start (chart, _args, options) {\n        const title = new Title({\n            ctx: chart.ctx,\n            options,\n            chart\n        });\n        layouts.configure(chart, title, options);\n        layouts.addBox(chart, title);\n        map.set(chart, title);\n    },\n    stop (chart) {\n        layouts.removeBox(chart, map.get(chart));\n        map.delete(chart);\n    },\n    beforeUpdate (chart, _args, options) {\n        const title = map.get(chart);\n        layouts.configure(chart, title, options);\n        title.options = options;\n    },\n    defaults: {\n        align: 'center',\n        display: false,\n        font: {\n            weight: 'normal'\n        },\n        fullSize: true,\n        padding: 0,\n        position: 'top',\n        text: '',\n        weight: 1500\n    },\n    defaultRoutes: {\n        color: 'color'\n    },\n    descriptors: {\n        _scriptable: true,\n        _indexable: false\n    }\n};\n\nconst positioners = {\n average (items) {\n        if (!items.length) {\n            return false;\n        }\n        let i, len;\n        let x = 0;\n        let y = 0;\n        let count = 0;\n        for(i = 0, len = items.length; i < len; ++i){\n            const el = items[i].element;\n            if (el && el.hasValue()) {\n                const pos = el.tooltipPosition();\n                x += pos.x;\n                y += pos.y;\n                ++count;\n            }\n        }\n        return {\n            x: x / count,\n            y: y / count\n        };\n    },\n nearest (items, eventPosition) {\n        if (!items.length) {\n            return false;\n        }\n        let x = eventPosition.x;\n        let y = eventPosition.y;\n        let minDistance = Number.POSITIVE_INFINITY;\n        let i, len, nearestElement;\n        for(i = 0, len = items.length; i < len; ++i){\n            const el = items[i].element;\n            if (el && el.hasValue()) {\n                const center = el.getCenterPoint();\n                const d = distanceBetweenPoints(eventPosition, center);\n                if (d < minDistance) {\n                    minDistance = d;\n                    nearestElement = el;\n                }\n            }\n        }\n        if (nearestElement) {\n            const tp = nearestElement.tooltipPosition();\n            x = tp.x;\n            y = tp.y;\n        }\n        return {\n            x,\n            y\n        };\n    }\n};\nfunction pushOrConcat(base, toPush) {\n    if (toPush) {\n        if (isArray(toPush)) {\n            Array.prototype.push.apply(base, toPush);\n        } else {\n            base.push(toPush);\n        }\n    }\n    return base;\n}\n function splitNewlines(str) {\n    if ((typeof str === 'string' || str instanceof String) && str.indexOf('\\n') > -1) {\n        return str.split('\\n');\n    }\n    return str;\n}\n function createTooltipItem(chart, item) {\n    const { element , datasetIndex , index  } = item;\n    const controller = chart.getDatasetMeta(datasetIndex).controller;\n    const { label , value  } = controller.getLabelAndValue(index);\n    return {\n        chart,\n        label,\n        parsed: controller.getParsed(index),\n        raw: chart.data.datasets[datasetIndex].data[index],\n        formattedValue: value,\n        dataset: controller.getDataset(),\n        dataIndex: index,\n        datasetIndex,\n        element\n    };\n}\n function getTooltipSize(tooltip, options) {\n    const ctx = tooltip.chart.ctx;\n    const { body , footer , title  } = tooltip;\n    const { boxWidth , boxHeight  } = options;\n    const bodyFont = toFont(options.bodyFont);\n    const titleFont = toFont(options.titleFont);\n    const footerFont = toFont(options.footerFont);\n    const titleLineCount = title.length;\n    const footerLineCount = footer.length;\n    const bodyLineItemCount = body.length;\n    const padding = toPadding(options.padding);\n    let height = padding.height;\n    let width = 0;\n    let combinedBodyLength = body.reduce((count, bodyItem)=>count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length, 0);\n    combinedBodyLength += tooltip.beforeBody.length + tooltip.afterBody.length;\n    if (titleLineCount) {\n        height += titleLineCount * titleFont.lineHeight + (titleLineCount - 1) * options.titleSpacing + options.titleMarginBottom;\n    }\n    if (combinedBodyLength) {\n        const bodyLineHeight = options.displayColors ? Math.max(boxHeight, bodyFont.lineHeight) : bodyFont.lineHeight;\n        height += bodyLineItemCount * bodyLineHeight + (combinedBodyLength - bodyLineItemCount) * bodyFont.lineHeight + (combinedBodyLength - 1) * options.bodySpacing;\n    }\n    if (footerLineCount) {\n        height += options.footerMarginTop + footerLineCount * footerFont.lineHeight + (footerLineCount - 1) * options.footerSpacing;\n    }\n    let widthPadding = 0;\n    const maxLineWidth = function(line) {\n        width = Math.max(width, ctx.measureText(line).width + widthPadding);\n    };\n    ctx.save();\n    ctx.font = titleFont.string;\n    each(tooltip.title, maxLineWidth);\n    ctx.font = bodyFont.string;\n    each(tooltip.beforeBody.concat(tooltip.afterBody), maxLineWidth);\n    widthPadding = options.displayColors ? boxWidth + 2 + options.boxPadding : 0;\n    each(body, (bodyItem)=>{\n        each(bodyItem.before, maxLineWidth);\n        each(bodyItem.lines, maxLineWidth);\n        each(bodyItem.after, maxLineWidth);\n    });\n    widthPadding = 0;\n    ctx.font = footerFont.string;\n    each(tooltip.footer, maxLineWidth);\n    ctx.restore();\n    width += padding.width;\n    return {\n        width,\n        height\n    };\n}\nfunction determineYAlign(chart, size) {\n    const { y , height  } = size;\n    if (y < height / 2) {\n        return 'top';\n    } else if (y > chart.height - height / 2) {\n        return 'bottom';\n    }\n    return 'center';\n}\nfunction doesNotFitWithAlign(xAlign, chart, options, size) {\n    const { x , width  } = size;\n    const caret = options.caretSize + options.caretPadding;\n    if (xAlign === 'left' && x + width + caret > chart.width) {\n        return true;\n    }\n    if (xAlign === 'right' && x - width - caret < 0) {\n        return true;\n    }\n}\nfunction determineXAlign(chart, options, size, yAlign) {\n    const { x , width  } = size;\n    const { width: chartWidth , chartArea: { left , right  }  } = chart;\n    let xAlign = 'center';\n    if (yAlign === 'center') {\n        xAlign = x <= (left + right) / 2 ? 'left' : 'right';\n    } else if (x <= width / 2) {\n        xAlign = 'left';\n    } else if (x >= chartWidth - width / 2) {\n        xAlign = 'right';\n    }\n    if (doesNotFitWithAlign(xAlign, chart, options, size)) {\n        xAlign = 'center';\n    }\n    return xAlign;\n}\n function determineAlignment(chart, options, size) {\n    const yAlign = size.yAlign || options.yAlign || determineYAlign(chart, size);\n    return {\n        xAlign: size.xAlign || options.xAlign || determineXAlign(chart, options, size, yAlign),\n        yAlign\n    };\n}\nfunction alignX(size, xAlign) {\n    let { x , width  } = size;\n    if (xAlign === 'right') {\n        x -= width;\n    } else if (xAlign === 'center') {\n        x -= width / 2;\n    }\n    return x;\n}\nfunction alignY(size, yAlign, paddingAndSize) {\n    let { y , height  } = size;\n    if (yAlign === 'top') {\n        y += paddingAndSize;\n    } else if (yAlign === 'bottom') {\n        y -= height + paddingAndSize;\n    } else {\n        y -= height / 2;\n    }\n    return y;\n}\n function getBackgroundPoint(options, size, alignment, chart) {\n    const { caretSize , caretPadding , cornerRadius  } = options;\n    const { xAlign , yAlign  } = alignment;\n    const paddingAndSize = caretSize + caretPadding;\n    const { topLeft , topRight , bottomLeft , bottomRight  } = toTRBLCorners(cornerRadius);\n    let x = alignX(size, xAlign);\n    const y = alignY(size, yAlign, paddingAndSize);\n    if (yAlign === 'center') {\n        if (xAlign === 'left') {\n            x += paddingAndSize;\n        } else if (xAlign === 'right') {\n            x -= paddingAndSize;\n        }\n    } else if (xAlign === 'left') {\n        x -= Math.max(topLeft, bottomLeft) + caretSize;\n    } else if (xAlign === 'right') {\n        x += Math.max(topRight, bottomRight) + caretSize;\n    }\n    return {\n        x: _limitValue(x, 0, chart.width - size.width),\n        y: _limitValue(y, 0, chart.height - size.height)\n    };\n}\nfunction getAlignedX(tooltip, align, options) {\n    const padding = toPadding(options.padding);\n    return align === 'center' ? tooltip.x + tooltip.width / 2 : align === 'right' ? tooltip.x + tooltip.width - padding.right : tooltip.x + padding.left;\n}\n function getBeforeAfterBodyLines(callback) {\n    return pushOrConcat([], splitNewlines(callback));\n}\nfunction createTooltipContext(parent, tooltip, tooltipItems) {\n    return createContext(parent, {\n        tooltip,\n        tooltipItems,\n        type: 'tooltip'\n    });\n}\nfunction overrideCallbacks(callbacks, context) {\n    const override = context && context.dataset && context.dataset.tooltip && context.dataset.tooltip.callbacks;\n    return override ? callbacks.override(override) : callbacks;\n}\nconst defaultCallbacks = {\n    beforeTitle: noop,\n    title (tooltipItems) {\n        if (tooltipItems.length > 0) {\n            const item = tooltipItems[0];\n            const labels = item.chart.data.labels;\n            const labelCount = labels ? labels.length : 0;\n            if (this && this.options && this.options.mode === 'dataset') {\n                return item.dataset.label || '';\n            } else if (item.label) {\n                return item.label;\n            } else if (labelCount > 0 && item.dataIndex < labelCount) {\n                return labels[item.dataIndex];\n            }\n        }\n        return '';\n    },\n    afterTitle: noop,\n    beforeBody: noop,\n    beforeLabel: noop,\n    label (tooltipItem) {\n        if (this && this.options && this.options.mode === 'dataset') {\n            return tooltipItem.label + ': ' + tooltipItem.formattedValue || tooltipItem.formattedValue;\n        }\n        let label = tooltipItem.dataset.label || '';\n        if (label) {\n            label += ': ';\n        }\n        const value = tooltipItem.formattedValue;\n        if (!isNullOrUndef(value)) {\n            label += value;\n        }\n        return label;\n    },\n    labelColor (tooltipItem) {\n        const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);\n        const options = meta.controller.getStyle(tooltipItem.dataIndex);\n        return {\n            borderColor: options.borderColor,\n            backgroundColor: options.backgroundColor,\n            borderWidth: options.borderWidth,\n            borderDash: options.borderDash,\n            borderDashOffset: options.borderDashOffset,\n            borderRadius: 0\n        };\n    },\n    labelTextColor () {\n        return this.options.bodyColor;\n    },\n    labelPointStyle (tooltipItem) {\n        const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);\n        const options = meta.controller.getStyle(tooltipItem.dataIndex);\n        return {\n            pointStyle: options.pointStyle,\n            rotation: options.rotation\n        };\n    },\n    afterLabel: noop,\n    afterBody: noop,\n    beforeFooter: noop,\n    footer: noop,\n    afterFooter: noop\n};\n function invokeCallbackWithFallback(callbacks, name, ctx, arg) {\n    const result = callbacks[name].call(ctx, arg);\n    if (typeof result === 'undefined') {\n        return defaultCallbacks[name].call(ctx, arg);\n    }\n    return result;\n}\nclass Tooltip extends Element {\n static positioners = positioners;\n    constructor(config){\n        super();\n        this.opacity = 0;\n        this._active = [];\n        this._eventPosition = undefined;\n        this._size = undefined;\n        this._cachedAnimations = undefined;\n        this._tooltipItems = [];\n        this.$animations = undefined;\n        this.$context = undefined;\n        this.chart = config.chart;\n        this.options = config.options;\n        this.dataPoints = undefined;\n        this.title = undefined;\n        this.beforeBody = undefined;\n        this.body = undefined;\n        this.afterBody = undefined;\n        this.footer = undefined;\n        this.xAlign = undefined;\n        this.yAlign = undefined;\n        this.x = undefined;\n        this.y = undefined;\n        this.height = undefined;\n        this.width = undefined;\n        this.caretX = undefined;\n        this.caretY = undefined;\n        this.labelColors = undefined;\n        this.labelPointStyles = undefined;\n        this.labelTextColors = undefined;\n    }\n    initialize(options) {\n        this.options = options;\n        this._cachedAnimations = undefined;\n        this.$context = undefined;\n    }\n _resolveAnimations() {\n        const cached = this._cachedAnimations;\n        if (cached) {\n            return cached;\n        }\n        const chart = this.chart;\n        const options = this.options.setContext(this.getContext());\n        const opts = options.enabled && chart.options.animation && options.animations;\n        const animations = new Animations(this.chart, opts);\n        if (opts._cacheable) {\n            this._cachedAnimations = Object.freeze(animations);\n        }\n        return animations;\n    }\n getContext() {\n        return this.$context || (this.$context = createTooltipContext(this.chart.getContext(), this, this._tooltipItems));\n    }\n    getTitle(context, options) {\n        const { callbacks  } = options;\n        const beforeTitle = invokeCallbackWithFallback(callbacks, 'beforeTitle', this, context);\n        const title = invokeCallbackWithFallback(callbacks, 'title', this, context);\n        const afterTitle = invokeCallbackWithFallback(callbacks, 'afterTitle', this, context);\n        let lines = [];\n        lines = pushOrConcat(lines, splitNewlines(beforeTitle));\n        lines = pushOrConcat(lines, splitNewlines(title));\n        lines = pushOrConcat(lines, splitNewlines(afterTitle));\n        return lines;\n    }\n    getBeforeBody(tooltipItems, options) {\n        return getBeforeAfterBodyLines(invokeCallbackWithFallback(options.callbacks, 'beforeBody', this, tooltipItems));\n    }\n    getBody(tooltipItems, options) {\n        const { callbacks  } = options;\n        const bodyItems = [];\n        each(tooltipItems, (context)=>{\n            const bodyItem = {\n                before: [],\n                lines: [],\n                after: []\n            };\n            const scoped = overrideCallbacks(callbacks, context);\n            pushOrConcat(bodyItem.before, splitNewlines(invokeCallbackWithFallback(scoped, 'beforeLabel', this, context)));\n            pushOrConcat(bodyItem.lines, invokeCallbackWithFallback(scoped, 'label', this, context));\n            pushOrConcat(bodyItem.after, splitNewlines(invokeCallbackWithFallback(scoped, 'afterLabel', this, context)));\n            bodyItems.push(bodyItem);\n        });\n        return bodyItems;\n    }\n    getAfterBody(tooltipItems, options) {\n        return getBeforeAfterBodyLines(invokeCallbackWithFallback(options.callbacks, 'afterBody', this, tooltipItems));\n    }\n    getFooter(tooltipItems, options) {\n        const { callbacks  } = options;\n        const beforeFooter = invokeCallbackWithFallback(callbacks, 'beforeFooter', this, tooltipItems);\n        const footer = invokeCallbackWithFallback(callbacks, 'footer', this, tooltipItems);\n        const afterFooter = invokeCallbackWithFallback(callbacks, 'afterFooter', this, tooltipItems);\n        let lines = [];\n        lines = pushOrConcat(lines, splitNewlines(beforeFooter));\n        lines = pushOrConcat(lines, splitNewlines(footer));\n        lines = pushOrConcat(lines, splitNewlines(afterFooter));\n        return lines;\n    }\n _createItems(options) {\n        const active = this._active;\n        const data = this.chart.data;\n        const labelColors = [];\n        const labelPointStyles = [];\n        const labelTextColors = [];\n        let tooltipItems = [];\n        let i, len;\n        for(i = 0, len = active.length; i < len; ++i){\n            tooltipItems.push(createTooltipItem(this.chart, active[i]));\n        }\n        if (options.filter) {\n            tooltipItems = tooltipItems.filter((element, index, array)=>options.filter(element, index, array, data));\n        }\n        if (options.itemSort) {\n            tooltipItems = tooltipItems.sort((a, b)=>options.itemSort(a, b, data));\n        }\n        each(tooltipItems, (context)=>{\n            const scoped = overrideCallbacks(options.callbacks, context);\n            labelColors.push(invokeCallbackWithFallback(scoped, 'labelColor', this, context));\n            labelPointStyles.push(invokeCallbackWithFallback(scoped, 'labelPointStyle', this, context));\n            labelTextColors.push(invokeCallbackWithFallback(scoped, 'labelTextColor', this, context));\n        });\n        this.labelColors = labelColors;\n        this.labelPointStyles = labelPointStyles;\n        this.labelTextColors = labelTextColors;\n        this.dataPoints = tooltipItems;\n        return tooltipItems;\n    }\n    update(changed, replay) {\n        const options = this.options.setContext(this.getContext());\n        const active = this._active;\n        let properties;\n        let tooltipItems = [];\n        if (!active.length) {\n            if (this.opacity !== 0) {\n                properties = {\n                    opacity: 0\n                };\n            }\n        } else {\n            const position = positioners[options.position].call(this, active, this._eventPosition);\n            tooltipItems = this._createItems(options);\n            this.title = this.getTitle(tooltipItems, options);\n            this.beforeBody = this.getBeforeBody(tooltipItems, options);\n            this.body = this.getBody(tooltipItems, options);\n            this.afterBody = this.getAfterBody(tooltipItems, options);\n            this.footer = this.getFooter(tooltipItems, options);\n            const size = this._size = getTooltipSize(this, options);\n            const positionAndSize = Object.assign({}, position, size);\n            const alignment = determineAlignment(this.chart, options, positionAndSize);\n            const backgroundPoint = getBackgroundPoint(options, positionAndSize, alignment, this.chart);\n            this.xAlign = alignment.xAlign;\n            this.yAlign = alignment.yAlign;\n            properties = {\n                opacity: 1,\n                x: backgroundPoint.x,\n                y: backgroundPoint.y,\n                width: size.width,\n                height: size.height,\n                caretX: position.x,\n                caretY: position.y\n            };\n        }\n        this._tooltipItems = tooltipItems;\n        this.$context = undefined;\n        if (properties) {\n            this._resolveAnimations().update(this, properties);\n        }\n        if (changed && options.external) {\n            options.external.call(this, {\n                chart: this.chart,\n                tooltip: this,\n                replay\n            });\n        }\n    }\n    drawCaret(tooltipPoint, ctx, size, options) {\n        const caretPosition = this.getCaretPosition(tooltipPoint, size, options);\n        ctx.lineTo(caretPosition.x1, caretPosition.y1);\n        ctx.lineTo(caretPosition.x2, caretPosition.y2);\n        ctx.lineTo(caretPosition.x3, caretPosition.y3);\n    }\n    getCaretPosition(tooltipPoint, size, options) {\n        const { xAlign , yAlign  } = this;\n        const { caretSize , cornerRadius  } = options;\n        const { topLeft , topRight , bottomLeft , bottomRight  } = toTRBLCorners(cornerRadius);\n        const { x: ptX , y: ptY  } = tooltipPoint;\n        const { width , height  } = size;\n        let x1, x2, x3, y1, y2, y3;\n        if (yAlign === 'center') {\n            y2 = ptY + height / 2;\n            if (xAlign === 'left') {\n                x1 = ptX;\n                x2 = x1 - caretSize;\n                y1 = y2 + caretSize;\n                y3 = y2 - caretSize;\n            } else {\n                x1 = ptX + width;\n                x2 = x1 + caretSize;\n                y1 = y2 - caretSize;\n                y3 = y2 + caretSize;\n            }\n            x3 = x1;\n        } else {\n            if (xAlign === 'left') {\n                x2 = ptX + Math.max(topLeft, bottomLeft) + caretSize;\n            } else if (xAlign === 'right') {\n                x2 = ptX + width - Math.max(topRight, bottomRight) - caretSize;\n            } else {\n                x2 = this.caretX;\n            }\n            if (yAlign === 'top') {\n                y1 = ptY;\n                y2 = y1 - caretSize;\n                x1 = x2 - caretSize;\n                x3 = x2 + caretSize;\n            } else {\n                y1 = ptY + height;\n                y2 = y1 + caretSize;\n                x1 = x2 + caretSize;\n                x3 = x2 - caretSize;\n            }\n            y3 = y1;\n        }\n        return {\n            x1,\n            x2,\n            x3,\n            y1,\n            y2,\n            y3\n        };\n    }\n    drawTitle(pt, ctx, options) {\n        const title = this.title;\n        const length = title.length;\n        let titleFont, titleSpacing, i;\n        if (length) {\n            const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n            pt.x = getAlignedX(this, options.titleAlign, options);\n            ctx.textAlign = rtlHelper.textAlign(options.titleAlign);\n            ctx.textBaseline = 'middle';\n            titleFont = toFont(options.titleFont);\n            titleSpacing = options.titleSpacing;\n            ctx.fillStyle = options.titleColor;\n            ctx.font = titleFont.string;\n            for(i = 0; i < length; ++i){\n                ctx.fillText(title[i], rtlHelper.x(pt.x), pt.y + titleFont.lineHeight / 2);\n                pt.y += titleFont.lineHeight + titleSpacing;\n                if (i + 1 === length) {\n                    pt.y += options.titleMarginBottom - titleSpacing;\n                }\n            }\n        }\n    }\n _drawColorBox(ctx, pt, i, rtlHelper, options) {\n        const labelColor = this.labelColors[i];\n        const labelPointStyle = this.labelPointStyles[i];\n        const { boxHeight , boxWidth  } = options;\n        const bodyFont = toFont(options.bodyFont);\n        const colorX = getAlignedX(this, 'left', options);\n        const rtlColorX = rtlHelper.x(colorX);\n        const yOffSet = boxHeight < bodyFont.lineHeight ? (bodyFont.lineHeight - boxHeight) / 2 : 0;\n        const colorY = pt.y + yOffSet;\n        if (options.usePointStyle) {\n            const drawOptions = {\n                radius: Math.min(boxWidth, boxHeight) / 2,\n                pointStyle: labelPointStyle.pointStyle,\n                rotation: labelPointStyle.rotation,\n                borderWidth: 1\n            };\n            const centerX = rtlHelper.leftForLtr(rtlColorX, boxWidth) + boxWidth / 2;\n            const centerY = colorY + boxHeight / 2;\n            ctx.strokeStyle = options.multiKeyBackground;\n            ctx.fillStyle = options.multiKeyBackground;\n            drawPoint(ctx, drawOptions, centerX, centerY);\n            ctx.strokeStyle = labelColor.borderColor;\n            ctx.fillStyle = labelColor.backgroundColor;\n            drawPoint(ctx, drawOptions, centerX, centerY);\n        } else {\n            ctx.lineWidth = isObject(labelColor.borderWidth) ? Math.max(...Object.values(labelColor.borderWidth)) : labelColor.borderWidth || 1;\n            ctx.strokeStyle = labelColor.borderColor;\n            ctx.setLineDash(labelColor.borderDash || []);\n            ctx.lineDashOffset = labelColor.borderDashOffset || 0;\n            const outerX = rtlHelper.leftForLtr(rtlColorX, boxWidth);\n            const innerX = rtlHelper.leftForLtr(rtlHelper.xPlus(rtlColorX, 1), boxWidth - 2);\n            const borderRadius = toTRBLCorners(labelColor.borderRadius);\n            if (Object.values(borderRadius).some((v)=>v !== 0)) {\n                ctx.beginPath();\n                ctx.fillStyle = options.multiKeyBackground;\n                addRoundedRectPath(ctx, {\n                    x: outerX,\n                    y: colorY,\n                    w: boxWidth,\n                    h: boxHeight,\n                    radius: borderRadius\n                });\n                ctx.fill();\n                ctx.stroke();\n                ctx.fillStyle = labelColor.backgroundColor;\n                ctx.beginPath();\n                addRoundedRectPath(ctx, {\n                    x: innerX,\n                    y: colorY + 1,\n                    w: boxWidth - 2,\n                    h: boxHeight - 2,\n                    radius: borderRadius\n                });\n                ctx.fill();\n            } else {\n                ctx.fillStyle = options.multiKeyBackground;\n                ctx.fillRect(outerX, colorY, boxWidth, boxHeight);\n                ctx.strokeRect(outerX, colorY, boxWidth, boxHeight);\n                ctx.fillStyle = labelColor.backgroundColor;\n                ctx.fillRect(innerX, colorY + 1, boxWidth - 2, boxHeight - 2);\n            }\n        }\n        ctx.fillStyle = this.labelTextColors[i];\n    }\n    drawBody(pt, ctx, options) {\n        const { body  } = this;\n        const { bodySpacing , bodyAlign , displayColors , boxHeight , boxWidth , boxPadding  } = options;\n        const bodyFont = toFont(options.bodyFont);\n        let bodyLineHeight = bodyFont.lineHeight;\n        let xLinePadding = 0;\n        const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n        const fillLineOfText = function(line) {\n            ctx.fillText(line, rtlHelper.x(pt.x + xLinePadding), pt.y + bodyLineHeight / 2);\n            pt.y += bodyLineHeight + bodySpacing;\n        };\n        const bodyAlignForCalculation = rtlHelper.textAlign(bodyAlign);\n        let bodyItem, textColor, lines, i, j, ilen, jlen;\n        ctx.textAlign = bodyAlign;\n        ctx.textBaseline = 'middle';\n        ctx.font = bodyFont.string;\n        pt.x = getAlignedX(this, bodyAlignForCalculation, options);\n        ctx.fillStyle = options.bodyColor;\n        each(this.beforeBody, fillLineOfText);\n        xLinePadding = displayColors && bodyAlignForCalculation !== 'right' ? bodyAlign === 'center' ? boxWidth / 2 + boxPadding : boxWidth + 2 + boxPadding : 0;\n        for(i = 0, ilen = body.length; i < ilen; ++i){\n            bodyItem = body[i];\n            textColor = this.labelTextColors[i];\n            ctx.fillStyle = textColor;\n            each(bodyItem.before, fillLineOfText);\n            lines = bodyItem.lines;\n            if (displayColors && lines.length) {\n                this._drawColorBox(ctx, pt, i, rtlHelper, options);\n                bodyLineHeight = Math.max(bodyFont.lineHeight, boxHeight);\n            }\n            for(j = 0, jlen = lines.length; j < jlen; ++j){\n                fillLineOfText(lines[j]);\n                bodyLineHeight = bodyFont.lineHeight;\n            }\n            each(bodyItem.after, fillLineOfText);\n        }\n        xLinePadding = 0;\n        bodyLineHeight = bodyFont.lineHeight;\n        each(this.afterBody, fillLineOfText);\n        pt.y -= bodySpacing;\n    }\n    drawFooter(pt, ctx, options) {\n        const footer = this.footer;\n        const length = footer.length;\n        let footerFont, i;\n        if (length) {\n            const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n            pt.x = getAlignedX(this, options.footerAlign, options);\n            pt.y += options.footerMarginTop;\n            ctx.textAlign = rtlHelper.textAlign(options.footerAlign);\n            ctx.textBaseline = 'middle';\n            footerFont = toFont(options.footerFont);\n            ctx.fillStyle = options.footerColor;\n            ctx.font = footerFont.string;\n            for(i = 0; i < length; ++i){\n                ctx.fillText(footer[i], rtlHelper.x(pt.x), pt.y + footerFont.lineHeight / 2);\n                pt.y += footerFont.lineHeight + options.footerSpacing;\n            }\n        }\n    }\n    drawBackground(pt, ctx, tooltipSize, options) {\n        const { xAlign , yAlign  } = this;\n        const { x , y  } = pt;\n        const { width , height  } = tooltipSize;\n        const { topLeft , topRight , bottomLeft , bottomRight  } = toTRBLCorners(options.cornerRadius);\n        ctx.fillStyle = options.backgroundColor;\n        ctx.strokeStyle = options.borderColor;\n        ctx.lineWidth = options.borderWidth;\n        ctx.beginPath();\n        ctx.moveTo(x + topLeft, y);\n        if (yAlign === 'top') {\n            this.drawCaret(pt, ctx, tooltipSize, options);\n        }\n        ctx.lineTo(x + width - topRight, y);\n        ctx.quadraticCurveTo(x + width, y, x + width, y + topRight);\n        if (yAlign === 'center' && xAlign === 'right') {\n            this.drawCaret(pt, ctx, tooltipSize, options);\n        }\n        ctx.lineTo(x + width, y + height - bottomRight);\n        ctx.quadraticCurveTo(x + width, y + height, x + width - bottomRight, y + height);\n        if (yAlign === 'bottom') {\n            this.drawCaret(pt, ctx, tooltipSize, options);\n        }\n        ctx.lineTo(x + bottomLeft, y + height);\n        ctx.quadraticCurveTo(x, y + height, x, y + height - bottomLeft);\n        if (yAlign === 'center' && xAlign === 'left') {\n            this.drawCaret(pt, ctx, tooltipSize, options);\n        }\n        ctx.lineTo(x, y + topLeft);\n        ctx.quadraticCurveTo(x, y, x + topLeft, y);\n        ctx.closePath();\n        ctx.fill();\n        if (options.borderWidth > 0) {\n            ctx.stroke();\n        }\n    }\n _updateAnimationTarget(options) {\n        const chart = this.chart;\n        const anims = this.$animations;\n        const animX = anims && anims.x;\n        const animY = anims && anims.y;\n        if (animX || animY) {\n            const position = positioners[options.position].call(this, this._active, this._eventPosition);\n            if (!position) {\n                return;\n            }\n            const size = this._size = getTooltipSize(this, options);\n            const positionAndSize = Object.assign({}, position, this._size);\n            const alignment = determineAlignment(chart, options, positionAndSize);\n            const point = getBackgroundPoint(options, positionAndSize, alignment, chart);\n            if (animX._to !== point.x || animY._to !== point.y) {\n                this.xAlign = alignment.xAlign;\n                this.yAlign = alignment.yAlign;\n                this.width = size.width;\n                this.height = size.height;\n                this.caretX = position.x;\n                this.caretY = position.y;\n                this._resolveAnimations().update(this, point);\n            }\n        }\n    }\n _willRender() {\n        return !!this.opacity;\n    }\n    draw(ctx) {\n        const options = this.options.setContext(this.getContext());\n        let opacity = this.opacity;\n        if (!opacity) {\n            return;\n        }\n        this._updateAnimationTarget(options);\n        const tooltipSize = {\n            width: this.width,\n            height: this.height\n        };\n        const pt = {\n            x: this.x,\n            y: this.y\n        };\n        opacity = Math.abs(opacity) < 1e-3 ? 0 : opacity;\n        const padding = toPadding(options.padding);\n        const hasTooltipContent = this.title.length || this.beforeBody.length || this.body.length || this.afterBody.length || this.footer.length;\n        if (options.enabled && hasTooltipContent) {\n            ctx.save();\n            ctx.globalAlpha = opacity;\n            this.drawBackground(pt, ctx, tooltipSize, options);\n            overrideTextDirection(ctx, options.textDirection);\n            pt.y += padding.top;\n            this.drawTitle(pt, ctx, options);\n            this.drawBody(pt, ctx, options);\n            this.drawFooter(pt, ctx, options);\n            restoreTextDirection(ctx, options.textDirection);\n            ctx.restore();\n        }\n    }\n getActiveElements() {\n        return this._active || [];\n    }\n setActiveElements(activeElements, eventPosition) {\n        const lastActive = this._active;\n        const active = activeElements.map(({ datasetIndex , index  })=>{\n            const meta = this.chart.getDatasetMeta(datasetIndex);\n            if (!meta) {\n                throw new Error('Cannot find a dataset at index ' + datasetIndex);\n            }\n            return {\n                datasetIndex,\n                element: meta.data[index],\n                index\n            };\n        });\n        const changed = !_elementsEqual(lastActive, active);\n        const positionChanged = this._positionChanged(active, eventPosition);\n        if (changed || positionChanged) {\n            this._active = active;\n            this._eventPosition = eventPosition;\n            this._ignoreReplayEvents = true;\n            this.update(true);\n        }\n    }\n handleEvent(e, replay, inChartArea = true) {\n        if (replay && this._ignoreReplayEvents) {\n            return false;\n        }\n        this._ignoreReplayEvents = false;\n        const options = this.options;\n        const lastActive = this._active || [];\n        const active = this._getActiveElements(e, lastActive, replay, inChartArea);\n        const positionChanged = this._positionChanged(active, e);\n        const changed = replay || !_elementsEqual(active, lastActive) || positionChanged;\n        if (changed) {\n            this._active = active;\n            if (options.enabled || options.external) {\n                this._eventPosition = {\n                    x: e.x,\n                    y: e.y\n                };\n                this.update(true, replay);\n            }\n        }\n        return changed;\n    }\n _getActiveElements(e, lastActive, replay, inChartArea) {\n        const options = this.options;\n        if (e.type === 'mouseout') {\n            return [];\n        }\n        if (!inChartArea) {\n            return lastActive.filter((i)=>this.chart.data.datasets[i.datasetIndex] && this.chart.getDatasetMeta(i.datasetIndex).controller.getParsed(i.index) !== undefined);\n        }\n        const active = this.chart.getElementsAtEventForMode(e, options.mode, options, replay);\n        if (options.reverse) {\n            active.reverse();\n        }\n        return active;\n    }\n _positionChanged(active, e) {\n        const { caretX , caretY , options  } = this;\n        const position = positioners[options.position].call(this, active, e);\n        return position !== false && (caretX !== position.x || caretY !== position.y);\n    }\n}\nvar plugin_tooltip = {\n    id: 'tooltip',\n    _element: Tooltip,\n    positioners,\n    afterInit (chart, _args, options) {\n        if (options) {\n            chart.tooltip = new Tooltip({\n                chart,\n                options\n            });\n        }\n    },\n    beforeUpdate (chart, _args, options) {\n        if (chart.tooltip) {\n            chart.tooltip.initialize(options);\n        }\n    },\n    reset (chart, _args, options) {\n        if (chart.tooltip) {\n            chart.tooltip.initialize(options);\n        }\n    },\n    afterDraw (chart) {\n        const tooltip = chart.tooltip;\n        if (tooltip && tooltip._willRender()) {\n            const args = {\n                tooltip\n            };\n            if (chart.notifyPlugins('beforeTooltipDraw', {\n                ...args,\n                cancelable: true\n            }) === false) {\n                return;\n            }\n            tooltip.draw(chart.ctx);\n            chart.notifyPlugins('afterTooltipDraw', args);\n        }\n    },\n    afterEvent (chart, args) {\n        if (chart.tooltip) {\n            const useFinalPosition = args.replay;\n            if (chart.tooltip.handleEvent(args.event, useFinalPosition, args.inChartArea)) {\n                args.changed = true;\n            }\n        }\n    },\n    defaults: {\n        enabled: true,\n        external: null,\n        position: 'average',\n        backgroundColor: 'rgba(0,0,0,0.8)',\n        titleColor: '#fff',\n        titleFont: {\n            weight: 'bold'\n        },\n        titleSpacing: 2,\n        titleMarginBottom: 6,\n        titleAlign: 'left',\n        bodyColor: '#fff',\n        bodySpacing: 2,\n        bodyFont: {},\n        bodyAlign: 'left',\n        footerColor: '#fff',\n        footerSpacing: 2,\n        footerMarginTop: 6,\n        footerFont: {\n            weight: 'bold'\n        },\n        footerAlign: 'left',\n        padding: 6,\n        caretPadding: 2,\n        caretSize: 5,\n        cornerRadius: 6,\n        boxHeight: (ctx, opts)=>opts.bodyFont.size,\n        boxWidth: (ctx, opts)=>opts.bodyFont.size,\n        multiKeyBackground: '#fff',\n        displayColors: true,\n        boxPadding: 0,\n        borderColor: 'rgba(0,0,0,0)',\n        borderWidth: 0,\n        animation: {\n            duration: 400,\n            easing: 'easeOutQuart'\n        },\n        animations: {\n            numbers: {\n                type: 'number',\n                properties: [\n                    'x',\n                    'y',\n                    'width',\n                    'height',\n                    'caretX',\n                    'caretY'\n                ]\n            },\n            opacity: {\n                easing: 'linear',\n                duration: 200\n            }\n        },\n        callbacks: defaultCallbacks\n    },\n    defaultRoutes: {\n        bodyFont: 'font',\n        footerFont: 'font',\n        titleFont: 'font'\n    },\n    descriptors: {\n        _scriptable: (name)=>name !== 'filter' && name !== 'itemSort' && name !== 'external',\n        _indexable: false,\n        callbacks: {\n            _scriptable: false,\n            _indexable: false\n        },\n        animation: {\n            _fallback: false\n        },\n        animations: {\n            _fallback: 'animation'\n        }\n    },\n    additionalOptionScopes: [\n        'interaction'\n    ]\n};\n\nvar plugins = /*#__PURE__*/Object.freeze({\n__proto__: null,\nColors: plugin_colors,\nDecimation: plugin_decimation,\nFiller: index,\nLegend: plugin_legend,\nSubTitle: plugin_subtitle,\nTitle: plugin_title,\nTooltip: plugin_tooltip\n});\n\nconst addIfString = (labels, raw, index, addedLabels)=>{\n    if (typeof raw === 'string') {\n        index = labels.push(raw) - 1;\n        addedLabels.unshift({\n            index,\n            label: raw\n        });\n    } else if (isNaN(raw)) {\n        index = null;\n    }\n    return index;\n};\nfunction findOrAddLabel(labels, raw, index, addedLabels) {\n    const first = labels.indexOf(raw);\n    if (first === -1) {\n        return addIfString(labels, raw, index, addedLabels);\n    }\n    const last = labels.lastIndexOf(raw);\n    return first !== last ? index : first;\n}\nconst validIndex = (index, max)=>index === null ? null : _limitValue(Math.round(index), 0, max);\nfunction _getLabelForValue(value) {\n    const labels = this.getLabels();\n    if (value >= 0 && value < labels.length) {\n        return labels[value];\n    }\n    return value;\n}\nclass CategoryScale extends Scale {\n    static id = 'category';\n static defaults = {\n        ticks: {\n            callback: _getLabelForValue\n        }\n    };\n    constructor(cfg){\n        super(cfg);\n         this._startValue = undefined;\n        this._valueRange = 0;\n        this._addedLabels = [];\n    }\n    init(scaleOptions) {\n        const added = this._addedLabels;\n        if (added.length) {\n            const labels = this.getLabels();\n            for (const { index , label  } of added){\n                if (labels[index] === label) {\n                    labels.splice(index, 1);\n                }\n            }\n            this._addedLabels = [];\n        }\n        super.init(scaleOptions);\n    }\n    parse(raw, index) {\n        if (isNullOrUndef(raw)) {\n            return null;\n        }\n        const labels = this.getLabels();\n        index = isFinite(index) && labels[index] === raw ? index : findOrAddLabel(labels, raw, valueOrDefault(index, raw), this._addedLabels);\n        return validIndex(index, labels.length - 1);\n    }\n    determineDataLimits() {\n        const { minDefined , maxDefined  } = this.getUserBounds();\n        let { min , max  } = this.getMinMax(true);\n        if (this.options.bounds === 'ticks') {\n            if (!minDefined) {\n                min = 0;\n            }\n            if (!maxDefined) {\n                max = this.getLabels().length - 1;\n            }\n        }\n        this.min = min;\n        this.max = max;\n    }\n    buildTicks() {\n        const min = this.min;\n        const max = this.max;\n        const offset = this.options.offset;\n        const ticks = [];\n        let labels = this.getLabels();\n        labels = min === 0 && max === labels.length - 1 ? labels : labels.slice(min, max + 1);\n        this._valueRange = Math.max(labels.length - (offset ? 0 : 1), 1);\n        this._startValue = this.min - (offset ? 0.5 : 0);\n        for(let value = min; value <= max; value++){\n            ticks.push({\n                value\n            });\n        }\n        return ticks;\n    }\n    getLabelForValue(value) {\n        return _getLabelForValue.call(this, value);\n    }\n configure() {\n        super.configure();\n        if (!this.isHorizontal()) {\n            this._reversePixels = !this._reversePixels;\n        }\n    }\n    getPixelForValue(value) {\n        if (typeof value !== 'number') {\n            value = this.parse(value);\n        }\n        return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);\n    }\n    getPixelForTick(index) {\n        const ticks = this.ticks;\n        if (index < 0 || index > ticks.length - 1) {\n            return null;\n        }\n        return this.getPixelForValue(ticks[index].value);\n    }\n    getValueForPixel(pixel) {\n        return Math.round(this._startValue + this.getDecimalForPixel(pixel) * this._valueRange);\n    }\n    getBasePixel() {\n        return this.bottom;\n    }\n}\n\nfunction generateTicks$1(generationOptions, dataRange) {\n    const ticks = [];\n    const MIN_SPACING = 1e-14;\n    const { bounds , step , min , max , precision , count , maxTicks , maxDigits , includeBounds  } = generationOptions;\n    const unit = step || 1;\n    const maxSpaces = maxTicks - 1;\n    const { min: rmin , max: rmax  } = dataRange;\n    const minDefined = !isNullOrUndef(min);\n    const maxDefined = !isNullOrUndef(max);\n    const countDefined = !isNullOrUndef(count);\n    const minSpacing = (rmax - rmin) / (maxDigits + 1);\n    let spacing = niceNum((rmax - rmin) / maxSpaces / unit) * unit;\n    let factor, niceMin, niceMax, numSpaces;\n    if (spacing < MIN_SPACING && !minDefined && !maxDefined) {\n        return [\n            {\n                value: rmin\n            },\n            {\n                value: rmax\n            }\n        ];\n    }\n    numSpaces = Math.ceil(rmax / spacing) - Math.floor(rmin / spacing);\n    if (numSpaces > maxSpaces) {\n        spacing = niceNum(numSpaces * spacing / maxSpaces / unit) * unit;\n    }\n    if (!isNullOrUndef(precision)) {\n        factor = Math.pow(10, precision);\n        spacing = Math.ceil(spacing * factor) / factor;\n    }\n    if (bounds === 'ticks') {\n        niceMin = Math.floor(rmin / spacing) * spacing;\n        niceMax = Math.ceil(rmax / spacing) * spacing;\n    } else {\n        niceMin = rmin;\n        niceMax = rmax;\n    }\n    if (minDefined && maxDefined && step && almostWhole((max - min) / step, spacing / 1000)) {\n        numSpaces = Math.round(Math.min((max - min) / spacing, maxTicks));\n        spacing = (max - min) / numSpaces;\n        niceMin = min;\n        niceMax = max;\n    } else if (countDefined) {\n        niceMin = minDefined ? min : niceMin;\n        niceMax = maxDefined ? max : niceMax;\n        numSpaces = count - 1;\n        spacing = (niceMax - niceMin) / numSpaces;\n    } else {\n        numSpaces = (niceMax - niceMin) / spacing;\n        if (almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {\n            numSpaces = Math.round(numSpaces);\n        } else {\n            numSpaces = Math.ceil(numSpaces);\n        }\n    }\n    const decimalPlaces = Math.max(_decimalPlaces(spacing), _decimalPlaces(niceMin));\n    factor = Math.pow(10, isNullOrUndef(precision) ? decimalPlaces : precision);\n    niceMin = Math.round(niceMin * factor) / factor;\n    niceMax = Math.round(niceMax * factor) / factor;\n    let j = 0;\n    if (minDefined) {\n        if (includeBounds && niceMin !== min) {\n            ticks.push({\n                value: min\n            });\n            if (niceMin < min) {\n                j++;\n            }\n            if (almostEquals(Math.round((niceMin + j * spacing) * factor) / factor, min, relativeLabelSize(min, minSpacing, generationOptions))) {\n                j++;\n            }\n        } else if (niceMin < min) {\n            j++;\n        }\n    }\n    for(; j < numSpaces; ++j){\n        const tickValue = Math.round((niceMin + j * spacing) * factor) / factor;\n        if (maxDefined && tickValue > max) {\n            break;\n        }\n        ticks.push({\n            value: tickValue\n        });\n    }\n    if (maxDefined && includeBounds && niceMax !== max) {\n        if (ticks.length && almostEquals(ticks[ticks.length - 1].value, max, relativeLabelSize(max, minSpacing, generationOptions))) {\n            ticks[ticks.length - 1].value = max;\n        } else {\n            ticks.push({\n                value: max\n            });\n        }\n    } else if (!maxDefined || niceMax === max) {\n        ticks.push({\n            value: niceMax\n        });\n    }\n    return ticks;\n}\nfunction relativeLabelSize(value, minSpacing, { horizontal , minRotation  }) {\n    const rad = toRadians(minRotation);\n    const ratio = (horizontal ? Math.sin(rad) : Math.cos(rad)) || 0.001;\n    const length = 0.75 * minSpacing * ('' + value).length;\n    return Math.min(minSpacing / ratio, length);\n}\nclass LinearScaleBase extends Scale {\n    constructor(cfg){\n        super(cfg);\n         this.start = undefined;\n         this.end = undefined;\n         this._startValue = undefined;\n         this._endValue = undefined;\n        this._valueRange = 0;\n    }\n    parse(raw, index) {\n        if (isNullOrUndef(raw)) {\n            return null;\n        }\n        if ((typeof raw === 'number' || raw instanceof Number) && !isFinite(+raw)) {\n            return null;\n        }\n        return +raw;\n    }\n    handleTickRangeOptions() {\n        const { beginAtZero  } = this.options;\n        const { minDefined , maxDefined  } = this.getUserBounds();\n        let { min , max  } = this;\n        const setMin = (v)=>min = minDefined ? min : v;\n        const setMax = (v)=>max = maxDefined ? max : v;\n        if (beginAtZero) {\n            const minSign = sign(min);\n            const maxSign = sign(max);\n            if (minSign < 0 && maxSign < 0) {\n                setMax(0);\n            } else if (minSign > 0 && maxSign > 0) {\n                setMin(0);\n            }\n        }\n        if (min === max) {\n            let offset = max === 0 ? 1 : Math.abs(max * 0.05);\n            setMax(max + offset);\n            if (!beginAtZero) {\n                setMin(min - offset);\n            }\n        }\n        this.min = min;\n        this.max = max;\n    }\n    getTickLimit() {\n        const tickOpts = this.options.ticks;\n        let { maxTicksLimit , stepSize  } = tickOpts;\n        let maxTicks;\n        if (stepSize) {\n            maxTicks = Math.ceil(this.max / stepSize) - Math.floor(this.min / stepSize) + 1;\n            if (maxTicks > 1000) {\n                console.warn(`scales.${this.id}.ticks.stepSize: ${stepSize} would result generating up to ${maxTicks} ticks. Limiting to 1000.`);\n                maxTicks = 1000;\n            }\n        } else {\n            maxTicks = this.computeTickLimit();\n            maxTicksLimit = maxTicksLimit || 11;\n        }\n        if (maxTicksLimit) {\n            maxTicks = Math.min(maxTicksLimit, maxTicks);\n        }\n        return maxTicks;\n    }\n computeTickLimit() {\n        return Number.POSITIVE_INFINITY;\n    }\n    buildTicks() {\n        const opts = this.options;\n        const tickOpts = opts.ticks;\n        let maxTicks = this.getTickLimit();\n        maxTicks = Math.max(2, maxTicks);\n        const numericGeneratorOptions = {\n            maxTicks,\n            bounds: opts.bounds,\n            min: opts.min,\n            max: opts.max,\n            precision: tickOpts.precision,\n            step: tickOpts.stepSize,\n            count: tickOpts.count,\n            maxDigits: this._maxDigits(),\n            horizontal: this.isHorizontal(),\n            minRotation: tickOpts.minRotation || 0,\n            includeBounds: tickOpts.includeBounds !== false\n        };\n        const dataRange = this._range || this;\n        const ticks = generateTicks$1(numericGeneratorOptions, dataRange);\n        if (opts.bounds === 'ticks') {\n            _setMinAndMaxByKey(ticks, this, 'value');\n        }\n        if (opts.reverse) {\n            ticks.reverse();\n            this.start = this.max;\n            this.end = this.min;\n        } else {\n            this.start = this.min;\n            this.end = this.max;\n        }\n        return ticks;\n    }\n configure() {\n        const ticks = this.ticks;\n        let start = this.min;\n        let end = this.max;\n        super.configure();\n        if (this.options.offset && ticks.length) {\n            const offset = (end - start) / Math.max(ticks.length - 1, 1) / 2;\n            start -= offset;\n            end += offset;\n        }\n        this._startValue = start;\n        this._endValue = end;\n        this._valueRange = end - start;\n    }\n    getLabelForValue(value) {\n        return formatNumber(value, this.chart.options.locale, this.options.ticks.format);\n    }\n}\n\nclass LinearScale extends LinearScaleBase {\n    static id = 'linear';\n static defaults = {\n        ticks: {\n            callback: Ticks.formatters.numeric\n        }\n    };\n    determineDataLimits() {\n        const { min , max  } = this.getMinMax(true);\n        this.min = isNumberFinite(min) ? min : 0;\n        this.max = isNumberFinite(max) ? max : 1;\n        this.handleTickRangeOptions();\n    }\n computeTickLimit() {\n        const horizontal = this.isHorizontal();\n        const length = horizontal ? this.width : this.height;\n        const minRotation = toRadians(this.options.ticks.minRotation);\n        const ratio = (horizontal ? Math.sin(minRotation) : Math.cos(minRotation)) || 0.001;\n        const tickFont = this._resolveTickFontOptions(0);\n        return Math.ceil(length / Math.min(40, tickFont.lineHeight / ratio));\n    }\n    getPixelForValue(value) {\n        return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);\n    }\n    getValueForPixel(pixel) {\n        return this._startValue + this.getDecimalForPixel(pixel) * this._valueRange;\n    }\n}\n\nconst log10Floor = (v)=>Math.floor(log10(v));\nconst changeExponent = (v, m)=>Math.pow(10, log10Floor(v) + m);\nfunction isMajor(tickVal) {\n    const remain = tickVal / Math.pow(10, log10Floor(tickVal));\n    return remain === 1;\n}\nfunction steps(min, max, rangeExp) {\n    const rangeStep = Math.pow(10, rangeExp);\n    const start = Math.floor(min / rangeStep);\n    const end = Math.ceil(max / rangeStep);\n    return end - start;\n}\nfunction startExp(min, max) {\n    const range = max - min;\n    let rangeExp = log10Floor(range);\n    while(steps(min, max, rangeExp) > 10){\n        rangeExp++;\n    }\n    while(steps(min, max, rangeExp) < 10){\n        rangeExp--;\n    }\n    return Math.min(rangeExp, log10Floor(min));\n}\n function generateTicks(generationOptions, { min , max  }) {\n    min = finiteOrDefault(generationOptions.min, min);\n    const ticks = [];\n    const minExp = log10Floor(min);\n    let exp = startExp(min, max);\n    let precision = exp < 0 ? Math.pow(10, Math.abs(exp)) : 1;\n    const stepSize = Math.pow(10, exp);\n    const base = minExp > exp ? Math.pow(10, minExp) : 0;\n    const start = Math.round((min - base) * precision) / precision;\n    const offset = Math.floor((min - base) / stepSize / 10) * stepSize * 10;\n    let significand = Math.floor((start - offset) / Math.pow(10, exp));\n    let value = finiteOrDefault(generationOptions.min, Math.round((base + offset + significand * Math.pow(10, exp)) * precision) / precision);\n    while(value < max){\n        ticks.push({\n            value,\n            major: isMajor(value),\n            significand\n        });\n        if (significand >= 10) {\n            significand = significand < 15 ? 15 : 20;\n        } else {\n            significand++;\n        }\n        if (significand >= 20) {\n            exp++;\n            significand = 2;\n            precision = exp >= 0 ? 1 : precision;\n        }\n        value = Math.round((base + offset + significand * Math.pow(10, exp)) * precision) / precision;\n    }\n    const lastTick = finiteOrDefault(generationOptions.max, value);\n    ticks.push({\n        value: lastTick,\n        major: isMajor(lastTick),\n        significand\n    });\n    return ticks;\n}\nclass LogarithmicScale extends Scale {\n    static id = 'logarithmic';\n static defaults = {\n        ticks: {\n            callback: Ticks.formatters.logarithmic,\n            major: {\n                enabled: true\n            }\n        }\n    };\n    constructor(cfg){\n        super(cfg);\n         this.start = undefined;\n         this.end = undefined;\n         this._startValue = undefined;\n        this._valueRange = 0;\n    }\n    parse(raw, index) {\n        const value = LinearScaleBase.prototype.parse.apply(this, [\n            raw,\n            index\n        ]);\n        if (value === 0) {\n            this._zero = true;\n            return undefined;\n        }\n        return isNumberFinite(value) && value > 0 ? value : null;\n    }\n    determineDataLimits() {\n        const { min , max  } = this.getMinMax(true);\n        this.min = isNumberFinite(min) ? Math.max(0, min) : null;\n        this.max = isNumberFinite(max) ? Math.max(0, max) : null;\n        if (this.options.beginAtZero) {\n            this._zero = true;\n        }\n        if (this._zero && this.min !== this._suggestedMin && !isNumberFinite(this._userMin)) {\n            this.min = min === changeExponent(this.min, 0) ? changeExponent(this.min, -1) : changeExponent(this.min, 0);\n        }\n        this.handleTickRangeOptions();\n    }\n    handleTickRangeOptions() {\n        const { minDefined , maxDefined  } = this.getUserBounds();\n        let min = this.min;\n        let max = this.max;\n        const setMin = (v)=>min = minDefined ? min : v;\n        const setMax = (v)=>max = maxDefined ? max : v;\n        if (min === max) {\n            if (min <= 0) {\n                setMin(1);\n                setMax(10);\n            } else {\n                setMin(changeExponent(min, -1));\n                setMax(changeExponent(max, +1));\n            }\n        }\n        if (min <= 0) {\n            setMin(changeExponent(max, -1));\n        }\n        if (max <= 0) {\n            setMax(changeExponent(min, +1));\n        }\n        this.min = min;\n        this.max = max;\n    }\n    buildTicks() {\n        const opts = this.options;\n        const generationOptions = {\n            min: this._userMin,\n            max: this._userMax\n        };\n        const ticks = generateTicks(generationOptions, this);\n        if (opts.bounds === 'ticks') {\n            _setMinAndMaxByKey(ticks, this, 'value');\n        }\n        if (opts.reverse) {\n            ticks.reverse();\n            this.start = this.max;\n            this.end = this.min;\n        } else {\n            this.start = this.min;\n            this.end = this.max;\n        }\n        return ticks;\n    }\n getLabelForValue(value) {\n        return value === undefined ? '0' : formatNumber(value, this.chart.options.locale, this.options.ticks.format);\n    }\n configure() {\n        const start = this.min;\n        super.configure();\n        this._startValue = log10(start);\n        this._valueRange = log10(this.max) - log10(start);\n    }\n    getPixelForValue(value) {\n        if (value === undefined || value === 0) {\n            value = this.min;\n        }\n        if (value === null || isNaN(value)) {\n            return NaN;\n        }\n        return this.getPixelForDecimal(value === this.min ? 0 : (log10(value) - this._startValue) / this._valueRange);\n    }\n    getValueForPixel(pixel) {\n        const decimal = this.getDecimalForPixel(pixel);\n        return Math.pow(10, this._startValue + decimal * this._valueRange);\n    }\n}\n\nfunction getTickBackdropHeight(opts) {\n    const tickOpts = opts.ticks;\n    if (tickOpts.display && opts.display) {\n        const padding = toPadding(tickOpts.backdropPadding);\n        return valueOrDefault(tickOpts.font && tickOpts.font.size, defaults.font.size) + padding.height;\n    }\n    return 0;\n}\nfunction measureLabelSize(ctx, font, label) {\n    label = isArray(label) ? label : [\n        label\n    ];\n    return {\n        w: _longestText(ctx, font.string, label),\n        h: label.length * font.lineHeight\n    };\n}\nfunction determineLimits(angle, pos, size, min, max) {\n    if (angle === min || angle === max) {\n        return {\n            start: pos - size / 2,\n            end: pos + size / 2\n        };\n    } else if (angle < min || angle > max) {\n        return {\n            start: pos - size,\n            end: pos\n        };\n    }\n    return {\n        start: pos,\n        end: pos + size\n    };\n}\n function fitWithPointLabels(scale) {\n    const orig = {\n        l: scale.left + scale._padding.left,\n        r: scale.right - scale._padding.right,\n        t: scale.top + scale._padding.top,\n        b: scale.bottom - scale._padding.bottom\n    };\n    const limits = Object.assign({}, orig);\n    const labelSizes = [];\n    const padding = [];\n    const valueCount = scale._pointLabels.length;\n    const pointLabelOpts = scale.options.pointLabels;\n    const additionalAngle = pointLabelOpts.centerPointLabels ? PI / valueCount : 0;\n    for(let i = 0; i < valueCount; i++){\n        const opts = pointLabelOpts.setContext(scale.getPointLabelContext(i));\n        padding[i] = opts.padding;\n        const pointPosition = scale.getPointPosition(i, scale.drawingArea + padding[i], additionalAngle);\n        const plFont = toFont(opts.font);\n        const textSize = measureLabelSize(scale.ctx, plFont, scale._pointLabels[i]);\n        labelSizes[i] = textSize;\n        const angleRadians = _normalizeAngle(scale.getIndexAngle(i) + additionalAngle);\n        const angle = Math.round(toDegrees(angleRadians));\n        const hLimits = determineLimits(angle, pointPosition.x, textSize.w, 0, 180);\n        const vLimits = determineLimits(angle, pointPosition.y, textSize.h, 90, 270);\n        updateLimits(limits, orig, angleRadians, hLimits, vLimits);\n    }\n    scale.setCenterPoint(orig.l - limits.l, limits.r - orig.r, orig.t - limits.t, limits.b - orig.b);\n    scale._pointLabelItems = buildPointLabelItems(scale, labelSizes, padding);\n}\nfunction updateLimits(limits, orig, angle, hLimits, vLimits) {\n    const sin = Math.abs(Math.sin(angle));\n    const cos = Math.abs(Math.cos(angle));\n    let x = 0;\n    let y = 0;\n    if (hLimits.start < orig.l) {\n        x = (orig.l - hLimits.start) / sin;\n        limits.l = Math.min(limits.l, orig.l - x);\n    } else if (hLimits.end > orig.r) {\n        x = (hLimits.end - orig.r) / sin;\n        limits.r = Math.max(limits.r, orig.r + x);\n    }\n    if (vLimits.start < orig.t) {\n        y = (orig.t - vLimits.start) / cos;\n        limits.t = Math.min(limits.t, orig.t - y);\n    } else if (vLimits.end > orig.b) {\n        y = (vLimits.end - orig.b) / cos;\n        limits.b = Math.max(limits.b, orig.b + y);\n    }\n}\nfunction createPointLabelItem(scale, index, itemOpts) {\n    const outerDistance = scale.drawingArea;\n    const { extra , additionalAngle , padding , size  } = itemOpts;\n    const pointLabelPosition = scale.getPointPosition(index, outerDistance + extra + padding, additionalAngle);\n    const angle = Math.round(toDegrees(_normalizeAngle(pointLabelPosition.angle + HALF_PI)));\n    const y = yForAngle(pointLabelPosition.y, size.h, angle);\n    const textAlign = getTextAlignForAngle(angle);\n    const left = leftForTextAlign(pointLabelPosition.x, size.w, textAlign);\n    return {\n        visible: true,\n        x: pointLabelPosition.x,\n        y,\n        textAlign,\n        left,\n        top: y,\n        right: left + size.w,\n        bottom: y + size.h\n    };\n}\nfunction isNotOverlapped(item, area) {\n    if (!area) {\n        return true;\n    }\n    const { left , top , right , bottom  } = item;\n    const apexesInArea = _isPointInArea({\n        x: left,\n        y: top\n    }, area) || _isPointInArea({\n        x: left,\n        y: bottom\n    }, area) || _isPointInArea({\n        x: right,\n        y: top\n    }, area) || _isPointInArea({\n        x: right,\n        y: bottom\n    }, area);\n    return !apexesInArea;\n}\nfunction buildPointLabelItems(scale, labelSizes, padding) {\n    const items = [];\n    const valueCount = scale._pointLabels.length;\n    const opts = scale.options;\n    const { centerPointLabels , display  } = opts.pointLabels;\n    const itemOpts = {\n        extra: getTickBackdropHeight(opts) / 2,\n        additionalAngle: centerPointLabels ? PI / valueCount : 0\n    };\n    let area;\n    for(let i = 0; i < valueCount; i++){\n        itemOpts.padding = padding[i];\n        itemOpts.size = labelSizes[i];\n        const item = createPointLabelItem(scale, i, itemOpts);\n        items.push(item);\n        if (display === 'auto') {\n            item.visible = isNotOverlapped(item, area);\n            if (item.visible) {\n                area = item;\n            }\n        }\n    }\n    return items;\n}\nfunction getTextAlignForAngle(angle) {\n    if (angle === 0 || angle === 180) {\n        return 'center';\n    } else if (angle < 180) {\n        return 'left';\n    }\n    return 'right';\n}\nfunction leftForTextAlign(x, w, align) {\n    if (align === 'right') {\n        x -= w;\n    } else if (align === 'center') {\n        x -= w / 2;\n    }\n    return x;\n}\nfunction yForAngle(y, h, angle) {\n    if (angle === 90 || angle === 270) {\n        y -= h / 2;\n    } else if (angle > 270 || angle < 90) {\n        y -= h;\n    }\n    return y;\n}\nfunction drawPointLabelBox(ctx, opts, item) {\n    const { left , top , right , bottom  } = item;\n    const { backdropColor  } = opts;\n    if (!isNullOrUndef(backdropColor)) {\n        const borderRadius = toTRBLCorners(opts.borderRadius);\n        const padding = toPadding(opts.backdropPadding);\n        ctx.fillStyle = backdropColor;\n        const backdropLeft = left - padding.left;\n        const backdropTop = top - padding.top;\n        const backdropWidth = right - left + padding.width;\n        const backdropHeight = bottom - top + padding.height;\n        if (Object.values(borderRadius).some((v)=>v !== 0)) {\n            ctx.beginPath();\n            addRoundedRectPath(ctx, {\n                x: backdropLeft,\n                y: backdropTop,\n                w: backdropWidth,\n                h: backdropHeight,\n                radius: borderRadius\n            });\n            ctx.fill();\n        } else {\n            ctx.fillRect(backdropLeft, backdropTop, backdropWidth, backdropHeight);\n        }\n    }\n}\nfunction drawPointLabels(scale, labelCount) {\n    const { ctx , options: { pointLabels  }  } = scale;\n    for(let i = labelCount - 1; i >= 0; i--){\n        const item = scale._pointLabelItems[i];\n        if (!item.visible) {\n            continue;\n        }\n        const optsAtIndex = pointLabels.setContext(scale.getPointLabelContext(i));\n        drawPointLabelBox(ctx, optsAtIndex, item);\n        const plFont = toFont(optsAtIndex.font);\n        const { x , y , textAlign  } = item;\n        renderText(ctx, scale._pointLabels[i], x, y + plFont.lineHeight / 2, plFont, {\n            color: optsAtIndex.color,\n            textAlign: textAlign,\n            textBaseline: 'middle'\n        });\n    }\n}\nfunction pathRadiusLine(scale, radius, circular, labelCount) {\n    const { ctx  } = scale;\n    if (circular) {\n        ctx.arc(scale.xCenter, scale.yCenter, radius, 0, TAU);\n    } else {\n        let pointPosition = scale.getPointPosition(0, radius);\n        ctx.moveTo(pointPosition.x, pointPosition.y);\n        for(let i = 1; i < labelCount; i++){\n            pointPosition = scale.getPointPosition(i, radius);\n            ctx.lineTo(pointPosition.x, pointPosition.y);\n        }\n    }\n}\nfunction drawRadiusLine(scale, gridLineOpts, radius, labelCount, borderOpts) {\n    const ctx = scale.ctx;\n    const circular = gridLineOpts.circular;\n    const { color , lineWidth  } = gridLineOpts;\n    if (!circular && !labelCount || !color || !lineWidth || radius < 0) {\n        return;\n    }\n    ctx.save();\n    ctx.strokeStyle = color;\n    ctx.lineWidth = lineWidth;\n    ctx.setLineDash(borderOpts.dash);\n    ctx.lineDashOffset = borderOpts.dashOffset;\n    ctx.beginPath();\n    pathRadiusLine(scale, radius, circular, labelCount);\n    ctx.closePath();\n    ctx.stroke();\n    ctx.restore();\n}\nfunction createPointLabelContext(parent, index, label) {\n    return createContext(parent, {\n        label,\n        index,\n        type: 'pointLabel'\n    });\n}\nclass RadialLinearScale extends LinearScaleBase {\n    static id = 'radialLinear';\n static defaults = {\n        display: true,\n        animate: true,\n        position: 'chartArea',\n        angleLines: {\n            display: true,\n            lineWidth: 1,\n            borderDash: [],\n            borderDashOffset: 0.0\n        },\n        grid: {\n            circular: false\n        },\n        startAngle: 0,\n        ticks: {\n            showLabelBackdrop: true,\n            callback: Ticks.formatters.numeric\n        },\n        pointLabels: {\n            backdropColor: undefined,\n            backdropPadding: 2,\n            display: true,\n            font: {\n                size: 10\n            },\n            callback (label) {\n                return label;\n            },\n            padding: 5,\n            centerPointLabels: false\n        }\n    };\n    static defaultRoutes = {\n        'angleLines.color': 'borderColor',\n        'pointLabels.color': 'color',\n        'ticks.color': 'color'\n    };\n    static descriptors = {\n        angleLines: {\n            _fallback: 'grid'\n        }\n    };\n    constructor(cfg){\n        super(cfg);\n         this.xCenter = undefined;\n         this.yCenter = undefined;\n         this.drawingArea = undefined;\n         this._pointLabels = [];\n        this._pointLabelItems = [];\n    }\n    setDimensions() {\n        const padding = this._padding = toPadding(getTickBackdropHeight(this.options) / 2);\n        const w = this.width = this.maxWidth - padding.width;\n        const h = this.height = this.maxHeight - padding.height;\n        this.xCenter = Math.floor(this.left + w / 2 + padding.left);\n        this.yCenter = Math.floor(this.top + h / 2 + padding.top);\n        this.drawingArea = Math.floor(Math.min(w, h) / 2);\n    }\n    determineDataLimits() {\n        const { min , max  } = this.getMinMax(false);\n        this.min = isNumberFinite(min) && !isNaN(min) ? min : 0;\n        this.max = isNumberFinite(max) && !isNaN(max) ? max : 0;\n        this.handleTickRangeOptions();\n    }\n computeTickLimit() {\n        return Math.ceil(this.drawingArea / getTickBackdropHeight(this.options));\n    }\n    generateTickLabels(ticks) {\n        LinearScaleBase.prototype.generateTickLabels.call(this, ticks);\n        this._pointLabels = this.getLabels().map((value, index)=>{\n            const label = callback(this.options.pointLabels.callback, [\n                value,\n                index\n            ], this);\n            return label || label === 0 ? label : '';\n        }).filter((v, i)=>this.chart.getDataVisibility(i));\n    }\n    fit() {\n        const opts = this.options;\n        if (opts.display && opts.pointLabels.display) {\n            fitWithPointLabels(this);\n        } else {\n            this.setCenterPoint(0, 0, 0, 0);\n        }\n    }\n    setCenterPoint(leftMovement, rightMovement, topMovement, bottomMovement) {\n        this.xCenter += Math.floor((leftMovement - rightMovement) / 2);\n        this.yCenter += Math.floor((topMovement - bottomMovement) / 2);\n        this.drawingArea -= Math.min(this.drawingArea / 2, Math.max(leftMovement, rightMovement, topMovement, bottomMovement));\n    }\n    getIndexAngle(index) {\n        const angleMultiplier = TAU / (this._pointLabels.length || 1);\n        const startAngle = this.options.startAngle || 0;\n        return _normalizeAngle(index * angleMultiplier + toRadians(startAngle));\n    }\n    getDistanceFromCenterForValue(value) {\n        if (isNullOrUndef(value)) {\n            return NaN;\n        }\n        const scalingFactor = this.drawingArea / (this.max - this.min);\n        if (this.options.reverse) {\n            return (this.max - value) * scalingFactor;\n        }\n        return (value - this.min) * scalingFactor;\n    }\n    getValueForDistanceFromCenter(distance) {\n        if (isNullOrUndef(distance)) {\n            return NaN;\n        }\n        const scaledDistance = distance / (this.drawingArea / (this.max - this.min));\n        return this.options.reverse ? this.max - scaledDistance : this.min + scaledDistance;\n    }\n    getPointLabelContext(index) {\n        const pointLabels = this._pointLabels || [];\n        if (index >= 0 && index < pointLabels.length) {\n            const pointLabel = pointLabels[index];\n            return createPointLabelContext(this.getContext(), index, pointLabel);\n        }\n    }\n    getPointPosition(index, distanceFromCenter, additionalAngle = 0) {\n        const angle = this.getIndexAngle(index) - HALF_PI + additionalAngle;\n        return {\n            x: Math.cos(angle) * distanceFromCenter + this.xCenter,\n            y: Math.sin(angle) * distanceFromCenter + this.yCenter,\n            angle\n        };\n    }\n    getPointPositionForValue(index, value) {\n        return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));\n    }\n    getBasePosition(index) {\n        return this.getPointPositionForValue(index || 0, this.getBaseValue());\n    }\n    getPointLabelPosition(index) {\n        const { left , top , right , bottom  } = this._pointLabelItems[index];\n        return {\n            left,\n            top,\n            right,\n            bottom\n        };\n    }\n drawBackground() {\n        const { backgroundColor , grid: { circular  }  } = this.options;\n        if (backgroundColor) {\n            const ctx = this.ctx;\n            ctx.save();\n            ctx.beginPath();\n            pathRadiusLine(this, this.getDistanceFromCenterForValue(this._endValue), circular, this._pointLabels.length);\n            ctx.closePath();\n            ctx.fillStyle = backgroundColor;\n            ctx.fill();\n            ctx.restore();\n        }\n    }\n drawGrid() {\n        const ctx = this.ctx;\n        const opts = this.options;\n        const { angleLines , grid , border  } = opts;\n        const labelCount = this._pointLabels.length;\n        let i, offset, position;\n        if (opts.pointLabels.display) {\n            drawPointLabels(this, labelCount);\n        }\n        if (grid.display) {\n            this.ticks.forEach((tick, index)=>{\n                if (index !== 0) {\n                    offset = this.getDistanceFromCenterForValue(tick.value);\n                    const context = this.getContext(index);\n                    const optsAtIndex = grid.setContext(context);\n                    const optsAtIndexBorder = border.setContext(context);\n                    drawRadiusLine(this, optsAtIndex, offset, labelCount, optsAtIndexBorder);\n                }\n            });\n        }\n        if (angleLines.display) {\n            ctx.save();\n            for(i = labelCount - 1; i >= 0; i--){\n                const optsAtIndex = angleLines.setContext(this.getPointLabelContext(i));\n                const { color , lineWidth  } = optsAtIndex;\n                if (!lineWidth || !color) {\n                    continue;\n                }\n                ctx.lineWidth = lineWidth;\n                ctx.strokeStyle = color;\n                ctx.setLineDash(optsAtIndex.borderDash);\n                ctx.lineDashOffset = optsAtIndex.borderDashOffset;\n                offset = this.getDistanceFromCenterForValue(opts.ticks.reverse ? this.min : this.max);\n                position = this.getPointPosition(i, offset);\n                ctx.beginPath();\n                ctx.moveTo(this.xCenter, this.yCenter);\n                ctx.lineTo(position.x, position.y);\n                ctx.stroke();\n            }\n            ctx.restore();\n        }\n    }\n drawBorder() {}\n drawLabels() {\n        const ctx = this.ctx;\n        const opts = this.options;\n        const tickOpts = opts.ticks;\n        if (!tickOpts.display) {\n            return;\n        }\n        const startAngle = this.getIndexAngle(0);\n        let offset, width;\n        ctx.save();\n        ctx.translate(this.xCenter, this.yCenter);\n        ctx.rotate(startAngle);\n        ctx.textAlign = 'center';\n        ctx.textBaseline = 'middle';\n        this.ticks.forEach((tick, index)=>{\n            if (index === 0 && !opts.reverse) {\n                return;\n            }\n            const optsAtIndex = tickOpts.setContext(this.getContext(index));\n            const tickFont = toFont(optsAtIndex.font);\n            offset = this.getDistanceFromCenterForValue(this.ticks[index].value);\n            if (optsAtIndex.showLabelBackdrop) {\n                ctx.font = tickFont.string;\n                width = ctx.measureText(tick.label).width;\n                ctx.fillStyle = optsAtIndex.backdropColor;\n                const padding = toPadding(optsAtIndex.backdropPadding);\n                ctx.fillRect(-width / 2 - padding.left, -offset - tickFont.size / 2 - padding.top, width + padding.width, tickFont.size + padding.height);\n            }\n            renderText(ctx, tick.label, 0, -offset, tickFont, {\n                color: optsAtIndex.color,\n                strokeColor: optsAtIndex.textStrokeColor,\n                strokeWidth: optsAtIndex.textStrokeWidth\n            });\n        });\n        ctx.restore();\n    }\n drawTitle() {}\n}\n\nconst INTERVALS = {\n    millisecond: {\n        common: true,\n        size: 1,\n        steps: 1000\n    },\n    second: {\n        common: true,\n        size: 1000,\n        steps: 60\n    },\n    minute: {\n        common: true,\n        size: 60000,\n        steps: 60\n    },\n    hour: {\n        common: true,\n        size: 3600000,\n        steps: 24\n    },\n    day: {\n        common: true,\n        size: 86400000,\n        steps: 30\n    },\n    week: {\n        common: false,\n        size: 604800000,\n        steps: 4\n    },\n    month: {\n        common: true,\n        size: 2.628e9,\n        steps: 12\n    },\n    quarter: {\n        common: false,\n        size: 7.884e9,\n        steps: 4\n    },\n    year: {\n        common: true,\n        size: 3.154e10\n    }\n};\n const UNITS =  /* #__PURE__ */ Object.keys(INTERVALS);\n function sorter(a, b) {\n    return a - b;\n}\n function parse(scale, input) {\n    if (isNullOrUndef(input)) {\n        return null;\n    }\n    const adapter = scale._adapter;\n    const { parser , round , isoWeekday  } = scale._parseOpts;\n    let value = input;\n    if (typeof parser === 'function') {\n        value = parser(value);\n    }\n    if (!isNumberFinite(value)) {\n        value = typeof parser === 'string' ? adapter.parse(value,  parser) : adapter.parse(value);\n    }\n    if (value === null) {\n        return null;\n    }\n    if (round) {\n        value = round === 'week' && (isNumber(isoWeekday) || isoWeekday === true) ? adapter.startOf(value, 'isoWeek', isoWeekday) : adapter.startOf(value, round);\n    }\n    return +value;\n}\n function determineUnitForAutoTicks(minUnit, min, max, capacity) {\n    const ilen = UNITS.length;\n    for(let i = UNITS.indexOf(minUnit); i < ilen - 1; ++i){\n        const interval = INTERVALS[UNITS[i]];\n        const factor = interval.steps ? interval.steps : Number.MAX_SAFE_INTEGER;\n        if (interval.common && Math.ceil((max - min) / (factor * interval.size)) <= capacity) {\n            return UNITS[i];\n        }\n    }\n    return UNITS[ilen - 1];\n}\n function determineUnitForFormatting(scale, numTicks, minUnit, min, max) {\n    for(let i = UNITS.length - 1; i >= UNITS.indexOf(minUnit); i--){\n        const unit = UNITS[i];\n        if (INTERVALS[unit].common && scale._adapter.diff(max, min, unit) >= numTicks - 1) {\n            return unit;\n        }\n    }\n    return UNITS[minUnit ? UNITS.indexOf(minUnit) : 0];\n}\n function determineMajorUnit(unit) {\n    for(let i = UNITS.indexOf(unit) + 1, ilen = UNITS.length; i < ilen; ++i){\n        if (INTERVALS[UNITS[i]].common) {\n            return UNITS[i];\n        }\n    }\n}\n function addTick(ticks, time, timestamps) {\n    if (!timestamps) {\n        ticks[time] = true;\n    } else if (timestamps.length) {\n        const { lo , hi  } = _lookup(timestamps, time);\n        const timestamp = timestamps[lo] >= time ? timestamps[lo] : timestamps[hi];\n        ticks[timestamp] = true;\n    }\n}\n function setMajorTicks(scale, ticks, map, majorUnit) {\n    const adapter = scale._adapter;\n    const first = +adapter.startOf(ticks[0].value, majorUnit);\n    const last = ticks[ticks.length - 1].value;\n    let major, index;\n    for(major = first; major <= last; major = +adapter.add(major, 1, majorUnit)){\n        index = map[major];\n        if (index >= 0) {\n            ticks[index].major = true;\n        }\n    }\n    return ticks;\n}\n function ticksFromTimestamps(scale, values, majorUnit) {\n    const ticks = [];\n     const map = {};\n    const ilen = values.length;\n    let i, value;\n    for(i = 0; i < ilen; ++i){\n        value = values[i];\n        map[value] = i;\n        ticks.push({\n            value,\n            major: false\n        });\n    }\n    return ilen === 0 || !majorUnit ? ticks : setMajorTicks(scale, ticks, map, majorUnit);\n}\nclass TimeScale extends Scale {\n    static id = 'time';\n static defaults = {\n bounds: 'data',\n        adapters: {},\n        time: {\n            parser: false,\n            unit: false,\n            round: false,\n            isoWeekday: false,\n            minUnit: 'millisecond',\n            displayFormats: {}\n        },\n        ticks: {\n source: 'auto',\n            callback: false,\n            major: {\n                enabled: false\n            }\n        }\n    };\n constructor(props){\n        super(props);\n         this._cache = {\n            data: [],\n            labels: [],\n            all: []\n        };\n         this._unit = 'day';\n         this._majorUnit = undefined;\n        this._offsets = {};\n        this._normalized = false;\n        this._parseOpts = undefined;\n    }\n    init(scaleOpts, opts = {}) {\n        const time = scaleOpts.time || (scaleOpts.time = {});\n         const adapter = this._adapter = new adapters._date(scaleOpts.adapters.date);\n        adapter.init(opts);\n        mergeIf(time.displayFormats, adapter.formats());\n        this._parseOpts = {\n            parser: time.parser,\n            round: time.round,\n            isoWeekday: time.isoWeekday\n        };\n        super.init(scaleOpts);\n        this._normalized = opts.normalized;\n    }\n parse(raw, index) {\n        if (raw === undefined) {\n            return null;\n        }\n        return parse(this, raw);\n    }\n    beforeLayout() {\n        super.beforeLayout();\n        this._cache = {\n            data: [],\n            labels: [],\n            all: []\n        };\n    }\n    determineDataLimits() {\n        const options = this.options;\n        const adapter = this._adapter;\n        const unit = options.time.unit || 'day';\n        let { min , max , minDefined , maxDefined  } = this.getUserBounds();\n function _applyBounds(bounds) {\n            if (!minDefined && !isNaN(bounds.min)) {\n                min = Math.min(min, bounds.min);\n            }\n            if (!maxDefined && !isNaN(bounds.max)) {\n                max = Math.max(max, bounds.max);\n            }\n        }\n        if (!minDefined || !maxDefined) {\n            _applyBounds(this._getLabelBounds());\n            if (options.bounds !== 'ticks' || options.ticks.source !== 'labels') {\n                _applyBounds(this.getMinMax(false));\n            }\n        }\n        min = isNumberFinite(min) && !isNaN(min) ? min : +adapter.startOf(Date.now(), unit);\n        max = isNumberFinite(max) && !isNaN(max) ? max : +adapter.endOf(Date.now(), unit) + 1;\n        this.min = Math.min(min, max - 1);\n        this.max = Math.max(min + 1, max);\n    }\n _getLabelBounds() {\n        const arr = this.getLabelTimestamps();\n        let min = Number.POSITIVE_INFINITY;\n        let max = Number.NEGATIVE_INFINITY;\n        if (arr.length) {\n            min = arr[0];\n            max = arr[arr.length - 1];\n        }\n        return {\n            min,\n            max\n        };\n    }\n buildTicks() {\n        const options = this.options;\n        const timeOpts = options.time;\n        const tickOpts = options.ticks;\n        const timestamps = tickOpts.source === 'labels' ? this.getLabelTimestamps() : this._generate();\n        if (options.bounds === 'ticks' && timestamps.length) {\n            this.min = this._userMin || timestamps[0];\n            this.max = this._userMax || timestamps[timestamps.length - 1];\n        }\n        const min = this.min;\n        const max = this.max;\n        const ticks = _filterBetween(timestamps, min, max);\n        this._unit = timeOpts.unit || (tickOpts.autoSkip ? determineUnitForAutoTicks(timeOpts.minUnit, this.min, this.max, this._getLabelCapacity(min)) : determineUnitForFormatting(this, ticks.length, timeOpts.minUnit, this.min, this.max));\n        this._majorUnit = !tickOpts.major.enabled || this._unit === 'year' ? undefined : determineMajorUnit(this._unit);\n        this.initOffsets(timestamps);\n        if (options.reverse) {\n            ticks.reverse();\n        }\n        return ticksFromTimestamps(this, ticks, this._majorUnit);\n    }\n    afterAutoSkip() {\n        if (this.options.offsetAfterAutoskip) {\n            this.initOffsets(this.ticks.map((tick)=>+tick.value));\n        }\n    }\n initOffsets(timestamps = []) {\n        let start = 0;\n        let end = 0;\n        let first, last;\n        if (this.options.offset && timestamps.length) {\n            first = this.getDecimalForValue(timestamps[0]);\n            if (timestamps.length === 1) {\n                start = 1 - first;\n            } else {\n                start = (this.getDecimalForValue(timestamps[1]) - first) / 2;\n            }\n            last = this.getDecimalForValue(timestamps[timestamps.length - 1]);\n            if (timestamps.length === 1) {\n                end = last;\n            } else {\n                end = (last - this.getDecimalForValue(timestamps[timestamps.length - 2])) / 2;\n            }\n        }\n        const limit = timestamps.length < 3 ? 0.5 : 0.25;\n        start = _limitValue(start, 0, limit);\n        end = _limitValue(end, 0, limit);\n        this._offsets = {\n            start,\n            end,\n            factor: 1 / (start + 1 + end)\n        };\n    }\n _generate() {\n        const adapter = this._adapter;\n        const min = this.min;\n        const max = this.max;\n        const options = this.options;\n        const timeOpts = options.time;\n        const minor = timeOpts.unit || determineUnitForAutoTicks(timeOpts.minUnit, min, max, this._getLabelCapacity(min));\n        const stepSize = valueOrDefault(options.ticks.stepSize, 1);\n        const weekday = minor === 'week' ? timeOpts.isoWeekday : false;\n        const hasWeekday = isNumber(weekday) || weekday === true;\n        const ticks = {};\n        let first = min;\n        let time, count;\n        if (hasWeekday) {\n            first = +adapter.startOf(first, 'isoWeek', weekday);\n        }\n        first = +adapter.startOf(first, hasWeekday ? 'day' : minor);\n        if (adapter.diff(max, min, minor) > 100000 * stepSize) {\n            throw new Error(min + ' and ' + max + ' are too far apart with stepSize of ' + stepSize + ' ' + minor);\n        }\n        const timestamps = options.ticks.source === 'data' && this.getDataTimestamps();\n        for(time = first, count = 0; time < max; time = +adapter.add(time, stepSize, minor), count++){\n            addTick(ticks, time, timestamps);\n        }\n        if (time === max || options.bounds === 'ticks' || count === 1) {\n            addTick(ticks, time, timestamps);\n        }\n        return Object.keys(ticks).sort(sorter).map((x)=>+x);\n    }\n getLabelForValue(value) {\n        const adapter = this._adapter;\n        const timeOpts = this.options.time;\n        if (timeOpts.tooltipFormat) {\n            return adapter.format(value, timeOpts.tooltipFormat);\n        }\n        return adapter.format(value, timeOpts.displayFormats.datetime);\n    }\n format(value, format) {\n        const options = this.options;\n        const formats = options.time.displayFormats;\n        const unit = this._unit;\n        const fmt = format || formats[unit];\n        return this._adapter.format(value, fmt);\n    }\n _tickFormatFunction(time, index, ticks, format) {\n        const options = this.options;\n        const formatter = options.ticks.callback;\n        if (formatter) {\n            return callback(formatter, [\n                time,\n                index,\n                ticks\n            ], this);\n        }\n        const formats = options.time.displayFormats;\n        const unit = this._unit;\n        const majorUnit = this._majorUnit;\n        const minorFormat = unit && formats[unit];\n        const majorFormat = majorUnit && formats[majorUnit];\n        const tick = ticks[index];\n        const major = majorUnit && majorFormat && tick && tick.major;\n        return this._adapter.format(time, format || (major ? majorFormat : minorFormat));\n    }\n generateTickLabels(ticks) {\n        let i, ilen, tick;\n        for(i = 0, ilen = ticks.length; i < ilen; ++i){\n            tick = ticks[i];\n            tick.label = this._tickFormatFunction(tick.value, i, ticks);\n        }\n    }\n getDecimalForValue(value) {\n        return value === null ? NaN : (value - this.min) / (this.max - this.min);\n    }\n getPixelForValue(value) {\n        const offsets = this._offsets;\n        const pos = this.getDecimalForValue(value);\n        return this.getPixelForDecimal((offsets.start + pos) * offsets.factor);\n    }\n getValueForPixel(pixel) {\n        const offsets = this._offsets;\n        const pos = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;\n        return this.min + pos * (this.max - this.min);\n    }\n _getLabelSize(label) {\n        const ticksOpts = this.options.ticks;\n        const tickLabelWidth = this.ctx.measureText(label).width;\n        const angle = toRadians(this.isHorizontal() ? ticksOpts.maxRotation : ticksOpts.minRotation);\n        const cosRotation = Math.cos(angle);\n        const sinRotation = Math.sin(angle);\n        const tickFontSize = this._resolveTickFontOptions(0).size;\n        return {\n            w: tickLabelWidth * cosRotation + tickFontSize * sinRotation,\n            h: tickLabelWidth * sinRotation + tickFontSize * cosRotation\n        };\n    }\n _getLabelCapacity(exampleTime) {\n        const timeOpts = this.options.time;\n        const displayFormats = timeOpts.displayFormats;\n        const format = displayFormats[timeOpts.unit] || displayFormats.millisecond;\n        const exampleLabel = this._tickFormatFunction(exampleTime, 0, ticksFromTimestamps(this, [\n            exampleTime\n        ], this._majorUnit), format);\n        const size = this._getLabelSize(exampleLabel);\n        const capacity = Math.floor(this.isHorizontal() ? this.width / size.w : this.height / size.h) - 1;\n        return capacity > 0 ? capacity : 1;\n    }\n getDataTimestamps() {\n        let timestamps = this._cache.data || [];\n        let i, ilen;\n        if (timestamps.length) {\n            return timestamps;\n        }\n        const metas = this.getMatchingVisibleMetas();\n        if (this._normalized && metas.length) {\n            return this._cache.data = metas[0].controller.getAllParsedValues(this);\n        }\n        for(i = 0, ilen = metas.length; i < ilen; ++i){\n            timestamps = timestamps.concat(metas[i].controller.getAllParsedValues(this));\n        }\n        return this._cache.data = this.normalize(timestamps);\n    }\n getLabelTimestamps() {\n        const timestamps = this._cache.labels || [];\n        let i, ilen;\n        if (timestamps.length) {\n            return timestamps;\n        }\n        const labels = this.getLabels();\n        for(i = 0, ilen = labels.length; i < ilen; ++i){\n            timestamps.push(parse(this, labels[i]));\n        }\n        return this._cache.labels = this._normalized ? timestamps : this.normalize(timestamps);\n    }\n normalize(values) {\n        return _arrayUnique(values.sort(sorter));\n    }\n}\n\nfunction interpolate(table, val, reverse) {\n    let lo = 0;\n    let hi = table.length - 1;\n    let prevSource, nextSource, prevTarget, nextTarget;\n    if (reverse) {\n        if (val >= table[lo].pos && val <= table[hi].pos) {\n            ({ lo , hi  } = _lookupByKey(table, 'pos', val));\n        }\n        ({ pos: prevSource , time: prevTarget  } = table[lo]);\n        ({ pos: nextSource , time: nextTarget  } = table[hi]);\n    } else {\n        if (val >= table[lo].time && val <= table[hi].time) {\n            ({ lo , hi  } = _lookupByKey(table, 'time', val));\n        }\n        ({ time: prevSource , pos: prevTarget  } = table[lo]);\n        ({ time: nextSource , pos: nextTarget  } = table[hi]);\n    }\n    const span = nextSource - prevSource;\n    return span ? prevTarget + (nextTarget - prevTarget) * (val - prevSource) / span : prevTarget;\n}\nclass TimeSeriesScale extends TimeScale {\n    static id = 'timeseries';\n static defaults = TimeScale.defaults;\n constructor(props){\n        super(props);\n         this._table = [];\n         this._minPos = undefined;\n         this._tableRange = undefined;\n    }\n initOffsets() {\n        const timestamps = this._getTimestampsForTable();\n        const table = this._table = this.buildLookupTable(timestamps);\n        this._minPos = interpolate(table, this.min);\n        this._tableRange = interpolate(table, this.max) - this._minPos;\n        super.initOffsets(timestamps);\n    }\n buildLookupTable(timestamps) {\n        const { min , max  } = this;\n        const items = [];\n        const table = [];\n        let i, ilen, prev, curr, next;\n        for(i = 0, ilen = timestamps.length; i < ilen; ++i){\n            curr = timestamps[i];\n            if (curr >= min && curr <= max) {\n                items.push(curr);\n            }\n        }\n        if (items.length < 2) {\n            return [\n                {\n                    time: min,\n                    pos: 0\n                },\n                {\n                    time: max,\n                    pos: 1\n                }\n            ];\n        }\n        for(i = 0, ilen = items.length; i < ilen; ++i){\n            next = items[i + 1];\n            prev = items[i - 1];\n            curr = items[i];\n            if (Math.round((next + prev) / 2) !== curr) {\n                table.push({\n                    time: curr,\n                    pos: i / (ilen - 1)\n                });\n            }\n        }\n        return table;\n    }\n _generate() {\n        const min = this.min;\n        const max = this.max;\n        let timestamps = super.getDataTimestamps();\n        if (!timestamps.includes(min) || !timestamps.length) {\n            timestamps.splice(0, 0, min);\n        }\n        if (!timestamps.includes(max) || timestamps.length === 1) {\n            timestamps.push(max);\n        }\n        return timestamps.sort((a, b)=>a - b);\n    }\n _getTimestampsForTable() {\n        let timestamps = this._cache.all || [];\n        if (timestamps.length) {\n            return timestamps;\n        }\n        const data = this.getDataTimestamps();\n        const label = this.getLabelTimestamps();\n        if (data.length && label.length) {\n            timestamps = this.normalize(data.concat(label));\n        } else {\n            timestamps = data.length ? data : label;\n        }\n        timestamps = this._cache.all = timestamps;\n        return timestamps;\n    }\n getDecimalForValue(value) {\n        return (interpolate(this._table, value) - this._minPos) / this._tableRange;\n    }\n getValueForPixel(pixel) {\n        const offsets = this._offsets;\n        const decimal = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;\n        return interpolate(this._table, decimal * this._tableRange + this._minPos, true);\n    }\n}\n\nvar scales = /*#__PURE__*/Object.freeze({\n__proto__: null,\nCategoryScale: CategoryScale,\nLinearScale: LinearScale,\nLogarithmicScale: LogarithmicScale,\nRadialLinearScale: RadialLinearScale,\nTimeScale: TimeScale,\nTimeSeriesScale: TimeSeriesScale\n});\n\nconst registerables = [\n    controllers,\n    elements,\n    plugins,\n    scales\n];\n\nexport { Animation, Animations, ArcElement, BarController, BarElement, BasePlatform, BasicPlatform, BubbleController, CategoryScale, Chart, plugin_colors as Colors, DatasetController, plugin_decimation as Decimation, DomPlatform, DoughnutController, Element, index as Filler, Interaction, plugin_legend as Legend, LineController, LineElement, LinearScale, LogarithmicScale, PieController, PointElement, PolarAreaController, RadarController, RadialLinearScale, Scale, ScatterController, plugin_subtitle as SubTitle, Ticks, TimeScale, TimeSeriesScale, plugin_title as Title, plugin_tooltip as Tooltip, adapters as _adapters, _detectPlatform, animator, controllers, defaults, elements, layouts, plugins, registerables, registry, scales };\n//# sourceMappingURL=chart.js.map\n"],"names":[],"sourceRoot":"webpack:///","x_google_ignoreList":[]}