diff --git "a/frontend/node_modules/chart.js/dist/chart.js" "b/frontend/node_modules/chart.js/dist/chart.js"
new file mode 100644--- /dev/null
+++ "b/frontend/node_modules/chart.js/dist/chart.js"
@@ -0,0 +1,11590 @@
+/*!
+ * Chart.js v4.5.0
+ * https://www.chartjs.org
+ * (c) 2025 Chart.js Contributors
+ * Released under the MIT License
+ */
+import { 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 getDatasetClipArea, ai as _elementsEqual, aj as _isClickEvent, ak as _isBetween, al as _normalizeAngle, am as _readValueToProps, an as _updateBezierControlPoints, ao as _computeSegments, ap as _boundSegments, aq as _steppedInterpolation, ar as _bezierInterpolation, as as _pointInLine, at as _steppedLineTo, au as _bezierCurveTo, av as drawPoint, aw as addRoundedRectPath, ax as toTRBL, ay as toTRBLCorners, az as _boundSegment, aA as getRtlAdapter, aB as overrideTextDirection, aC as _textX, aD as restoreTextDirection, aE as drawPointLegend, aF as distanceBetweenPoints, aG as noop, aH as _setMinAndMaxByKey, aI as niceNum, aJ as almostWhole, aK as almostEquals, aL as _decimalPlaces, aM as Ticks, aN as log10, aO as _longestText, aP as _filterBetween, aQ as _lookup } from './chunks/helpers.dataset.js';
+import '@kurkle/color';
+
+class Animator {
+    constructor(){
+        this._request = null;
+        this._charts = new Map();
+        this._running = false;
+        this._lastDate = undefined;
+    }
+ _notify(chart, anims, date, type) {
+        const callbacks = anims.listeners[type];
+        const numSteps = anims.duration;
+        callbacks.forEach((fn)=>fn({
+                chart,
+                initial: anims.initial,
+                numSteps,
+                currentStep: Math.min(date - anims.start, numSteps)
+            }));
+    }
+ _refresh() {
+        if (this._request) {
+            return;
+        }
+        this._running = true;
+        this._request = requestAnimFrame.call(window, ()=>{
+            this._update();
+            this._request = null;
+            if (this._running) {
+                this._refresh();
+            }
+        });
+    }
+ _update(date = Date.now()) {
+        let remaining = 0;
+        this._charts.forEach((anims, chart)=>{
+            if (!anims.running || !anims.items.length) {
+                return;
+            }
+            const items = anims.items;
+            let i = items.length - 1;
+            let draw = false;
+            let item;
+            for(; i >= 0; --i){
+                item = items[i];
+                if (item._active) {
+                    if (item._total > anims.duration) {
+                        anims.duration = item._total;
+                    }
+                    item.tick(date);
+                    draw = true;
+                } else {
+                    items[i] = items[items.length - 1];
+                    items.pop();
+                }
+            }
+            if (draw) {
+                chart.draw();
+                this._notify(chart, anims, date, 'progress');
+            }
+            if (!items.length) {
+                anims.running = false;
+                this._notify(chart, anims, date, 'complete');
+                anims.initial = false;
+            }
+            remaining += items.length;
+        });
+        this._lastDate = date;
+        if (remaining === 0) {
+            this._running = false;
+        }
+    }
+ _getAnims(chart) {
+        const charts = this._charts;
+        let anims = charts.get(chart);
+        if (!anims) {
+            anims = {
+                running: false,
+                initial: true,
+                items: [],
+                listeners: {
+                    complete: [],
+                    progress: []
+                }
+            };
+            charts.set(chart, anims);
+        }
+        return anims;
+    }
+ listen(chart, event, cb) {
+        this._getAnims(chart).listeners[event].push(cb);
+    }
+ add(chart, items) {
+        if (!items || !items.length) {
+            return;
+        }
+        this._getAnims(chart).items.push(...items);
+    }
+ has(chart) {
+        return this._getAnims(chart).items.length > 0;
+    }
+ start(chart) {
+        const anims = this._charts.get(chart);
+        if (!anims) {
+            return;
+        }
+        anims.running = true;
+        anims.start = Date.now();
+        anims.duration = anims.items.reduce((acc, cur)=>Math.max(acc, cur._duration), 0);
+        this._refresh();
+    }
+    running(chart) {
+        if (!this._running) {
+            return false;
+        }
+        const anims = this._charts.get(chart);
+        if (!anims || !anims.running || !anims.items.length) {
+            return false;
+        }
+        return true;
+    }
+ stop(chart) {
+        const anims = this._charts.get(chart);
+        if (!anims || !anims.items.length) {
+            return;
+        }
+        const items = anims.items;
+        let i = items.length - 1;
+        for(; i >= 0; --i){
+            items[i].cancel();
+        }
+        anims.items = [];
+        this._notify(chart, anims, Date.now(), 'complete');
+    }
+ remove(chart) {
+        return this._charts.delete(chart);
+    }
+}
+var animator = /* #__PURE__ */ new Animator();
+
+const transparent = 'transparent';
+const interpolators = {
+    boolean (from, to, factor) {
+        return factor > 0.5 ? to : from;
+    },
+ color (from, to, factor) {
+        const c0 = color(from || transparent);
+        const c1 = c0.valid && color(to || transparent);
+        return c1 && c1.valid ? c1.mix(c0, factor).hexString() : to;
+    },
+    number (from, to, factor) {
+        return from + (to - from) * factor;
+    }
+};
+class Animation {
+    constructor(cfg, target, prop, to){
+        const currentValue = target[prop];
+        to = resolve([
+            cfg.to,
+            to,
+            currentValue,
+            cfg.from
+        ]);
+        const from = resolve([
+            cfg.from,
+            currentValue,
+            to
+        ]);
+        this._active = true;
+        this._fn = cfg.fn || interpolators[cfg.type || typeof from];
+        this._easing = effects[cfg.easing] || effects.linear;
+        this._start = Math.floor(Date.now() + (cfg.delay || 0));
+        this._duration = this._total = Math.floor(cfg.duration);
+        this._loop = !!cfg.loop;
+        this._target = target;
+        this._prop = prop;
+        this._from = from;
+        this._to = to;
+        this._promises = undefined;
+    }
+    active() {
+        return this._active;
+    }
+    update(cfg, to, date) {
+        if (this._active) {
+            this._notify(false);
+            const currentValue = this._target[this._prop];
+            const elapsed = date - this._start;
+            const remain = this._duration - elapsed;
+            this._start = date;
+            this._duration = Math.floor(Math.max(remain, cfg.duration));
+            this._total += elapsed;
+            this._loop = !!cfg.loop;
+            this._to = resolve([
+                cfg.to,
+                to,
+                currentValue,
+                cfg.from
+            ]);
+            this._from = resolve([
+                cfg.from,
+                currentValue,
+                to
+            ]);
+        }
+    }
+    cancel() {
+        if (this._active) {
+            this.tick(Date.now());
+            this._active = false;
+            this._notify(false);
+        }
+    }
+    tick(date) {
+        const elapsed = date - this._start;
+        const duration = this._duration;
+        const prop = this._prop;
+        const from = this._from;
+        const loop = this._loop;
+        const to = this._to;
+        let factor;
+        this._active = from !== to && (loop || elapsed < duration);
+        if (!this._active) {
+            this._target[prop] = to;
+            this._notify(true);
+            return;
+        }
+        if (elapsed < 0) {
+            this._target[prop] = from;
+            return;
+        }
+        factor = elapsed / duration % 2;
+        factor = loop && factor > 1 ? 2 - factor : factor;
+        factor = this._easing(Math.min(1, Math.max(0, factor)));
+        this._target[prop] = this._fn(from, to, factor);
+    }
+    wait() {
+        const promises = this._promises || (this._promises = []);
+        return new Promise((res, rej)=>{
+            promises.push({
+                res,
+                rej
+            });
+        });
+    }
+    _notify(resolved) {
+        const method = resolved ? 'res' : 'rej';
+        const promises = this._promises || [];
+        for(let i = 0; i < promises.length; i++){
+            promises[i][method]();
+        }
+    }
+}
+
+class Animations {
+    constructor(chart, config){
+        this._chart = chart;
+        this._properties = new Map();
+        this.configure(config);
+    }
+    configure(config) {
+        if (!isObject(config)) {
+            return;
+        }
+        const animationOptions = Object.keys(defaults.animation);
+        const animatedProps = this._properties;
+        Object.getOwnPropertyNames(config).forEach((key)=>{
+            const cfg = config[key];
+            if (!isObject(cfg)) {
+                return;
+            }
+            const resolved = {};
+            for (const option of animationOptions){
+                resolved[option] = cfg[option];
+            }
+            (isArray(cfg.properties) && cfg.properties || [
+                key
+            ]).forEach((prop)=>{
+                if (prop === key || !animatedProps.has(prop)) {
+                    animatedProps.set(prop, resolved);
+                }
+            });
+        });
+    }
+ _animateOptions(target, values) {
+        const newOptions = values.options;
+        const options = resolveTargetOptions(target, newOptions);
+        if (!options) {
+            return [];
+        }
+        const animations = this._createAnimations(options, newOptions);
+        if (newOptions.$shared) {
+            awaitAll(target.options.$animations, newOptions).then(()=>{
+                target.options = newOptions;
+            }, ()=>{
+            });
+        }
+        return animations;
+    }
+ _createAnimations(target, values) {
+        const animatedProps = this._properties;
+        const animations = [];
+        const running = target.$animations || (target.$animations = {});
+        const props = Object.keys(values);
+        const date = Date.now();
+        let i;
+        for(i = props.length - 1; i >= 0; --i){
+            const prop = props[i];
+            if (prop.charAt(0) === '$') {
+                continue;
+            }
+            if (prop === 'options') {
+                animations.push(...this._animateOptions(target, values));
+                continue;
+            }
+            const value = values[prop];
+            let animation = running[prop];
+            const cfg = animatedProps.get(prop);
+            if (animation) {
+                if (cfg && animation.active()) {
+                    animation.update(cfg, value, date);
+                    continue;
+                } else {
+                    animation.cancel();
+                }
+            }
+            if (!cfg || !cfg.duration) {
+                target[prop] = value;
+                continue;
+            }
+            running[prop] = animation = new Animation(cfg, target, prop, value);
+            animations.push(animation);
+        }
+        return animations;
+    }
+ update(target, values) {
+        if (this._properties.size === 0) {
+            Object.assign(target, values);
+            return;
+        }
+        const animations = this._createAnimations(target, values);
+        if (animations.length) {
+            animator.add(this._chart, animations);
+            return true;
+        }
+    }
+}
+function awaitAll(animations, properties) {
+    const running = [];
+    const keys = Object.keys(properties);
+    for(let i = 0; i < keys.length; i++){
+        const anim = animations[keys[i]];
+        if (anim && anim.active()) {
+            running.push(anim.wait());
+        }
+    }
+    return Promise.all(running);
+}
+function resolveTargetOptions(target, newOptions) {
+    if (!newOptions) {
+        return;
+    }
+    let options = target.options;
+    if (!options) {
+        target.options = newOptions;
+        return;
+    }
+    if (options.$shared) {
+        target.options = options = Object.assign({}, options, {
+            $shared: false,
+            $animations: {}
+        });
+    }
+    return options;
+}
+
+function scaleClip(scale, allowedOverflow) {
+    const opts = scale && scale.options || {};
+    const reverse = opts.reverse;
+    const min = opts.min === undefined ? allowedOverflow : 0;
+    const max = opts.max === undefined ? allowedOverflow : 0;
+    return {
+        start: reverse ? max : min,
+        end: reverse ? min : max
+    };
+}
+function defaultClip(xScale, yScale, allowedOverflow) {
+    if (allowedOverflow === false) {
+        return false;
+    }
+    const x = scaleClip(xScale, allowedOverflow);
+    const y = scaleClip(yScale, allowedOverflow);
+    return {
+        top: y.end,
+        right: x.end,
+        bottom: y.start,
+        left: x.start
+    };
+}
+function toClip(value) {
+    let t, r, b, l;
+    if (isObject(value)) {
+        t = value.top;
+        r = value.right;
+        b = value.bottom;
+        l = value.left;
+    } else {
+        t = r = b = l = value;
+    }
+    return {
+        top: t,
+        right: r,
+        bottom: b,
+        left: l,
+        disabled: value === false
+    };
+}
+function getSortedDatasetIndices(chart, filterVisible) {
+    const keys = [];
+    const metasets = chart._getSortedDatasetMetas(filterVisible);
+    let i, ilen;
+    for(i = 0, ilen = metasets.length; i < ilen; ++i){
+        keys.push(metasets[i].index);
+    }
+    return keys;
+}
+function applyStack(stack, value, dsIndex, options = {}) {
+    const keys = stack.keys;
+    const singleMode = options.mode === 'single';
+    let i, ilen, datasetIndex, otherValue;
+    if (value === null) {
+        return;
+    }
+    let found = false;
+    for(i = 0, ilen = keys.length; i < ilen; ++i){
+        datasetIndex = +keys[i];
+        if (datasetIndex === dsIndex) {
+            found = true;
+            if (options.all) {
+                continue;
+            }
+            break;
+        }
+        otherValue = stack.values[datasetIndex];
+        if (isNumberFinite(otherValue) && (singleMode || value === 0 || sign(value) === sign(otherValue))) {
+            value += otherValue;
+        }
+    }
+    if (!found && !options.all) {
+        return 0;
+    }
+    return value;
+}
+function convertObjectDataToArray(data, meta) {
+    const { iScale , vScale  } = meta;
+    const iAxisKey = iScale.axis === 'x' ? 'x' : 'y';
+    const vAxisKey = vScale.axis === 'x' ? 'x' : 'y';
+    const keys = Object.keys(data);
+    const adata = new Array(keys.length);
+    let i, ilen, key;
+    for(i = 0, ilen = keys.length; i < ilen; ++i){
+        key = keys[i];
+        adata[i] = {
+            [iAxisKey]: key,
+            [vAxisKey]: data[key]
+        };
+    }
+    return adata;
+}
+function isStacked(scale, meta) {
+    const stacked = scale && scale.options.stacked;
+    return stacked || stacked === undefined && meta.stack !== undefined;
+}
+function getStackKey(indexScale, valueScale, meta) {
+    return `${indexScale.id}.${valueScale.id}.${meta.stack || meta.type}`;
+}
+function getUserBounds(scale) {
+    const { min , max , minDefined , maxDefined  } = scale.getUserBounds();
+    return {
+        min: minDefined ? min : Number.NEGATIVE_INFINITY,
+        max: maxDefined ? max : Number.POSITIVE_INFINITY
+    };
+}
+function getOrCreateStack(stacks, stackKey, indexValue) {
+    const subStack = stacks[stackKey] || (stacks[stackKey] = {});
+    return subStack[indexValue] || (subStack[indexValue] = {});
+}
+function getLastIndexInStack(stack, vScale, positive, type) {
+    for (const meta of vScale.getMatchingVisibleMetas(type).reverse()){
+        const value = stack[meta.index];
+        if (positive && value > 0 || !positive && value < 0) {
+            return meta.index;
+        }
+    }
+    return null;
+}
+function updateStacks(controller, parsed) {
+    const { chart , _cachedMeta: meta  } = controller;
+    const stacks = chart._stacks || (chart._stacks = {});
+    const { iScale , vScale , index: datasetIndex  } = meta;
+    const iAxis = iScale.axis;
+    const vAxis = vScale.axis;
+    const key = getStackKey(iScale, vScale, meta);
+    const ilen = parsed.length;
+    let stack;
+    for(let i = 0; i < ilen; ++i){
+        const item = parsed[i];
+        const { [iAxis]: index , [vAxis]: value  } = item;
+        const itemStacks = item._stacks || (item._stacks = {});
+        stack = itemStacks[vAxis] = getOrCreateStack(stacks, key, index);
+        stack[datasetIndex] = value;
+        stack._top = getLastIndexInStack(stack, vScale, true, meta.type);
+        stack._bottom = getLastIndexInStack(stack, vScale, false, meta.type);
+        const visualValues = stack._visualValues || (stack._visualValues = {});
+        visualValues[datasetIndex] = value;
+    }
+}
+function getFirstScaleId(chart, axis) {
+    const scales = chart.scales;
+    return Object.keys(scales).filter((key)=>scales[key].axis === axis).shift();
+}
+function createDatasetContext(parent, index) {
+    return createContext(parent, {
+        active: false,
+        dataset: undefined,
+        datasetIndex: index,
+        index,
+        mode: 'default',
+        type: 'dataset'
+    });
+}
+function createDataContext(parent, index, element) {
+    return createContext(parent, {
+        active: false,
+        dataIndex: index,
+        parsed: undefined,
+        raw: undefined,
+        element,
+        index,
+        mode: 'default',
+        type: 'data'
+    });
+}
+function clearStacks(meta, items) {
+    const datasetIndex = meta.controller.index;
+    const axis = meta.vScale && meta.vScale.axis;
+    if (!axis) {
+        return;
+    }
+    items = items || meta._parsed;
+    for (const parsed of items){
+        const stacks = parsed._stacks;
+        if (!stacks || stacks[axis] === undefined || stacks[axis][datasetIndex] === undefined) {
+            return;
+        }
+        delete stacks[axis][datasetIndex];
+        if (stacks[axis]._visualValues !== undefined && stacks[axis]._visualValues[datasetIndex] !== undefined) {
+            delete stacks[axis]._visualValues[datasetIndex];
+        }
+    }
+}
+const isDirectUpdateMode = (mode)=>mode === 'reset' || mode === 'none';
+const cloneIfNotShared = (cached, shared)=>shared ? cached : Object.assign({}, cached);
+const createStack = (canStack, meta, chart)=>canStack && !meta.hidden && meta._stacked && {
+        keys: getSortedDatasetIndices(chart, true),
+        values: null
+    };
+class DatasetController {
+ static defaults = {};
+ static datasetElementType = null;
+ static dataElementType = null;
+ constructor(chart, datasetIndex){
+        this.chart = chart;
+        this._ctx = chart.ctx;
+        this.index = datasetIndex;
+        this._cachedDataOpts = {};
+        this._cachedMeta = this.getMeta();
+        this._type = this._cachedMeta.type;
+        this.options = undefined;
+         this._parsing = false;
+        this._data = undefined;
+        this._objectData = undefined;
+        this._sharedOptions = undefined;
+        this._drawStart = undefined;
+        this._drawCount = undefined;
+        this.enableOptionSharing = false;
+        this.supportsDecimation = false;
+        this.$context = undefined;
+        this._syncList = [];
+        this.datasetElementType = new.target.datasetElementType;
+        this.dataElementType = new.target.dataElementType;
+        this.initialize();
+    }
+    initialize() {
+        const meta = this._cachedMeta;
+        this.configure();
+        this.linkScales();
+        meta._stacked = isStacked(meta.vScale, meta);
+        this.addElements();
+        if (this.options.fill && !this.chart.isPluginEnabled('filler')) {
+            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");
+        }
+    }
+    updateIndex(datasetIndex) {
+        if (this.index !== datasetIndex) {
+            clearStacks(this._cachedMeta);
+        }
+        this.index = datasetIndex;
+    }
+    linkScales() {
+        const chart = this.chart;
+        const meta = this._cachedMeta;
+        const dataset = this.getDataset();
+        const chooseId = (axis, x, y, r)=>axis === 'x' ? x : axis === 'r' ? r : y;
+        const xid = meta.xAxisID = valueOrDefault(dataset.xAxisID, getFirstScaleId(chart, 'x'));
+        const yid = meta.yAxisID = valueOrDefault(dataset.yAxisID, getFirstScaleId(chart, 'y'));
+        const rid = meta.rAxisID = valueOrDefault(dataset.rAxisID, getFirstScaleId(chart, 'r'));
+        const indexAxis = meta.indexAxis;
+        const iid = meta.iAxisID = chooseId(indexAxis, xid, yid, rid);
+        const vid = meta.vAxisID = chooseId(indexAxis, yid, xid, rid);
+        meta.xScale = this.getScaleForId(xid);
+        meta.yScale = this.getScaleForId(yid);
+        meta.rScale = this.getScaleForId(rid);
+        meta.iScale = this.getScaleForId(iid);
+        meta.vScale = this.getScaleForId(vid);
+    }
+    getDataset() {
+        return this.chart.data.datasets[this.index];
+    }
+    getMeta() {
+        return this.chart.getDatasetMeta(this.index);
+    }
+ getScaleForId(scaleID) {
+        return this.chart.scales[scaleID];
+    }
+ _getOtherScale(scale) {
+        const meta = this._cachedMeta;
+        return scale === meta.iScale ? meta.vScale : meta.iScale;
+    }
+    reset() {
+        this._update('reset');
+    }
+ _destroy() {
+        const meta = this._cachedMeta;
+        if (this._data) {
+            unlistenArrayEvents(this._data, this);
+        }
+        if (meta._stacked) {
+            clearStacks(meta);
+        }
+    }
+ _dataCheck() {
+        const dataset = this.getDataset();
+        const data = dataset.data || (dataset.data = []);
+        const _data = this._data;
+        if (isObject(data)) {
+            const meta = this._cachedMeta;
+            this._data = convertObjectDataToArray(data, meta);
+        } else if (_data !== data) {
+            if (_data) {
+                unlistenArrayEvents(_data, this);
+                const meta = this._cachedMeta;
+                clearStacks(meta);
+                meta._parsed = [];
+            }
+            if (data && Object.isExtensible(data)) {
+                listenArrayEvents(data, this);
+            }
+            this._syncList = [];
+            this._data = data;
+        }
+    }
+    addElements() {
+        const meta = this._cachedMeta;
+        this._dataCheck();
+        if (this.datasetElementType) {
+            meta.dataset = new this.datasetElementType();
+        }
+    }
+    buildOrUpdateElements(resetNewElements) {
+        const meta = this._cachedMeta;
+        const dataset = this.getDataset();
+        let stackChanged = false;
+        this._dataCheck();
+        const oldStacked = meta._stacked;
+        meta._stacked = isStacked(meta.vScale, meta);
+        if (meta.stack !== dataset.stack) {
+            stackChanged = true;
+            clearStacks(meta);
+            meta.stack = dataset.stack;
+        }
+        this._resyncElements(resetNewElements);
+        if (stackChanged || oldStacked !== meta._stacked) {
+            updateStacks(this, meta._parsed);
+            meta._stacked = isStacked(meta.vScale, meta);
+        }
+    }
+ configure() {
+        const config = this.chart.config;
+        const scopeKeys = config.datasetScopeKeys(this._type);
+        const scopes = config.getOptionScopes(this.getDataset(), scopeKeys, true);
+        this.options = config.createResolver(scopes, this.getContext());
+        this._parsing = this.options.parsing;
+        this._cachedDataOpts = {};
+    }
+ parse(start, count) {
+        const { _cachedMeta: meta , _data: data  } = this;
+        const { iScale , _stacked  } = meta;
+        const iAxis = iScale.axis;
+        let sorted = start === 0 && count === data.length ? true : meta._sorted;
+        let prev = start > 0 && meta._parsed[start - 1];
+        let i, cur, parsed;
+        if (this._parsing === false) {
+            meta._parsed = data;
+            meta._sorted = true;
+            parsed = data;
+        } else {
+            if (isArray(data[start])) {
+                parsed = this.parseArrayData(meta, data, start, count);
+            } else if (isObject(data[start])) {
+                parsed = this.parseObjectData(meta, data, start, count);
+            } else {
+                parsed = this.parsePrimitiveData(meta, data, start, count);
+            }
+            const isNotInOrderComparedToPrev = ()=>cur[iAxis] === null || prev && cur[iAxis] < prev[iAxis];
+            for(i = 0; i < count; ++i){
+                meta._parsed[i + start] = cur = parsed[i];
+                if (sorted) {
+                    if (isNotInOrderComparedToPrev()) {
+                        sorted = false;
+                    }
+                    prev = cur;
+                }
+            }
+            meta._sorted = sorted;
+        }
+        if (_stacked) {
+            updateStacks(this, parsed);
+        }
+    }
+ parsePrimitiveData(meta, data, start, count) {
+        const { iScale , vScale  } = meta;
+        const iAxis = iScale.axis;
+        const vAxis = vScale.axis;
+        const labels = iScale.getLabels();
+        const singleScale = iScale === vScale;
+        const parsed = new Array(count);
+        let i, ilen, index;
+        for(i = 0, ilen = count; i < ilen; ++i){
+            index = i + start;
+            parsed[i] = {
+                [iAxis]: singleScale || iScale.parse(labels[index], index),
+                [vAxis]: vScale.parse(data[index], index)
+            };
+        }
+        return parsed;
+    }
+ parseArrayData(meta, data, start, count) {
+        const { xScale , yScale  } = meta;
+        const parsed = new Array(count);
+        let i, ilen, index, item;
+        for(i = 0, ilen = count; i < ilen; ++i){
+            index = i + start;
+            item = data[index];
+            parsed[i] = {
+                x: xScale.parse(item[0], index),
+                y: yScale.parse(item[1], index)
+            };
+        }
+        return parsed;
+    }
+ parseObjectData(meta, data, start, count) {
+        const { xScale , yScale  } = meta;
+        const { xAxisKey ='x' , yAxisKey ='y'  } = this._parsing;
+        const parsed = new Array(count);
+        let i, ilen, index, item;
+        for(i = 0, ilen = count; i < ilen; ++i){
+            index = i + start;
+            item = data[index];
+            parsed[i] = {
+                x: xScale.parse(resolveObjectKey(item, xAxisKey), index),
+                y: yScale.parse(resolveObjectKey(item, yAxisKey), index)
+            };
+        }
+        return parsed;
+    }
+ getParsed(index) {
+        return this._cachedMeta._parsed[index];
+    }
+ getDataElement(index) {
+        return this._cachedMeta.data[index];
+    }
+ applyStack(scale, parsed, mode) {
+        const chart = this.chart;
+        const meta = this._cachedMeta;
+        const value = parsed[scale.axis];
+        const stack = {
+            keys: getSortedDatasetIndices(chart, true),
+            values: parsed._stacks[scale.axis]._visualValues
+        };
+        return applyStack(stack, value, meta.index, {
+            mode
+        });
+    }
+ updateRangeFromParsed(range, scale, parsed, stack) {
+        const parsedValue = parsed[scale.axis];
+        let value = parsedValue === null ? NaN : parsedValue;
+        const values = stack && parsed._stacks[scale.axis];
+        if (stack && values) {
+            stack.values = values;
+            value = applyStack(stack, parsedValue, this._cachedMeta.index);
+        }
+        range.min = Math.min(range.min, value);
+        range.max = Math.max(range.max, value);
+    }
+ getMinMax(scale, canStack) {
+        const meta = this._cachedMeta;
+        const _parsed = meta._parsed;
+        const sorted = meta._sorted && scale === meta.iScale;
+        const ilen = _parsed.length;
+        const otherScale = this._getOtherScale(scale);
+        const stack = createStack(canStack, meta, this.chart);
+        const range = {
+            min: Number.POSITIVE_INFINITY,
+            max: Number.NEGATIVE_INFINITY
+        };
+        const { min: otherMin , max: otherMax  } = getUserBounds(otherScale);
+        let i, parsed;
+        function _skip() {
+            parsed = _parsed[i];
+            const otherValue = parsed[otherScale.axis];
+            return !isNumberFinite(parsed[scale.axis]) || otherMin > otherValue || otherMax < otherValue;
+        }
+        for(i = 0; i < ilen; ++i){
+            if (_skip()) {
+                continue;
+            }
+            this.updateRangeFromParsed(range, scale, parsed, stack);
+            if (sorted) {
+                break;
+            }
+        }
+        if (sorted) {
+            for(i = ilen - 1; i >= 0; --i){
+                if (_skip()) {
+                    continue;
+                }
+                this.updateRangeFromParsed(range, scale, parsed, stack);
+                break;
+            }
+        }
+        return range;
+    }
+    getAllParsedValues(scale) {
+        const parsed = this._cachedMeta._parsed;
+        const values = [];
+        let i, ilen, value;
+        for(i = 0, ilen = parsed.length; i < ilen; ++i){
+            value = parsed[i][scale.axis];
+            if (isNumberFinite(value)) {
+                values.push(value);
+            }
+        }
+        return values;
+    }
+ getMaxOverflow() {
+        return false;
+    }
+ getLabelAndValue(index) {
+        const meta = this._cachedMeta;
+        const iScale = meta.iScale;
+        const vScale = meta.vScale;
+        const parsed = this.getParsed(index);
+        return {
+            label: iScale ? '' + iScale.getLabelForValue(parsed[iScale.axis]) : '',
+            value: vScale ? '' + vScale.getLabelForValue(parsed[vScale.axis]) : ''
+        };
+    }
+ _update(mode) {
+        const meta = this._cachedMeta;
+        this.update(mode || 'default');
+        meta._clip = toClip(valueOrDefault(this.options.clip, defaultClip(meta.xScale, meta.yScale, this.getMaxOverflow())));
+    }
+ update(mode) {}
+    draw() {
+        const ctx = this._ctx;
+        const chart = this.chart;
+        const meta = this._cachedMeta;
+        const elements = meta.data || [];
+        const area = chart.chartArea;
+        const active = [];
+        const start = this._drawStart || 0;
+        const count = this._drawCount || elements.length - start;
+        const drawActiveElementsOnTop = this.options.drawActiveElementsOnTop;
+        let i;
+        if (meta.dataset) {
+            meta.dataset.draw(ctx, area, start, count);
+        }
+        for(i = start; i < start + count; ++i){
+            const element = elements[i];
+            if (element.hidden) {
+                continue;
+            }
+            if (element.active && drawActiveElementsOnTop) {
+                active.push(element);
+            } else {
+                element.draw(ctx, area);
+            }
+        }
+        for(i = 0; i < active.length; ++i){
+            active[i].draw(ctx, area);
+        }
+    }
+ getStyle(index, active) {
+        const mode = active ? 'active' : 'default';
+        return index === undefined && this._cachedMeta.dataset ? this.resolveDatasetElementOptions(mode) : this.resolveDataElementOptions(index || 0, mode);
+    }
+ getContext(index, active, mode) {
+        const dataset = this.getDataset();
+        let context;
+        if (index >= 0 && index < this._cachedMeta.data.length) {
+            const element = this._cachedMeta.data[index];
+            context = element.$context || (element.$context = createDataContext(this.getContext(), index, element));
+            context.parsed = this.getParsed(index);
+            context.raw = dataset.data[index];
+            context.index = context.dataIndex = index;
+        } else {
+            context = this.$context || (this.$context = createDatasetContext(this.chart.getContext(), this.index));
+            context.dataset = dataset;
+            context.index = context.datasetIndex = this.index;
+        }
+        context.active = !!active;
+        context.mode = mode;
+        return context;
+    }
+ resolveDatasetElementOptions(mode) {
+        return this._resolveElementOptions(this.datasetElementType.id, mode);
+    }
+ resolveDataElementOptions(index, mode) {
+        return this._resolveElementOptions(this.dataElementType.id, mode, index);
+    }
+ _resolveElementOptions(elementType, mode = 'default', index) {
+        const active = mode === 'active';
+        const cache = this._cachedDataOpts;
+        const cacheKey = elementType + '-' + mode;
+        const cached = cache[cacheKey];
+        const sharing = this.enableOptionSharing && defined(index);
+        if (cached) {
+            return cloneIfNotShared(cached, sharing);
+        }
+        const config = this.chart.config;
+        const scopeKeys = config.datasetElementScopeKeys(this._type, elementType);
+        const prefixes = active ? [
+            `${elementType}Hover`,
+            'hover',
+            elementType,
+            ''
+        ] : [
+            elementType,
+            ''
+        ];
+        const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);
+        const names = Object.keys(defaults.elements[elementType]);
+        const context = ()=>this.getContext(index, active, mode);
+        const values = config.resolveNamedOptions(scopes, names, context, prefixes);
+        if (values.$shared) {
+            values.$shared = sharing;
+            cache[cacheKey] = Object.freeze(cloneIfNotShared(values, sharing));
+        }
+        return values;
+    }
+ _resolveAnimations(index, transition, active) {
+        const chart = this.chart;
+        const cache = this._cachedDataOpts;
+        const cacheKey = `animation-${transition}`;
+        const cached = cache[cacheKey];
+        if (cached) {
+            return cached;
+        }
+        let options;
+        if (chart.options.animation !== false) {
+            const config = this.chart.config;
+            const scopeKeys = config.datasetAnimationScopeKeys(this._type, transition);
+            const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);
+            options = config.createResolver(scopes, this.getContext(index, active, transition));
+        }
+        const animations = new Animations(chart, options && options.animations);
+        if (options && options._cacheable) {
+            cache[cacheKey] = Object.freeze(animations);
+        }
+        return animations;
+    }
+ getSharedOptions(options) {
+        if (!options.$shared) {
+            return;
+        }
+        return this._sharedOptions || (this._sharedOptions = Object.assign({}, options));
+    }
+ includeOptions(mode, sharedOptions) {
+        return !sharedOptions || isDirectUpdateMode(mode) || this.chart._animationsDisabled;
+    }
+ _getSharedOptions(start, mode) {
+        const firstOpts = this.resolveDataElementOptions(start, mode);
+        const previouslySharedOptions = this._sharedOptions;
+        const sharedOptions = this.getSharedOptions(firstOpts);
+        const includeOptions = this.includeOptions(mode, sharedOptions) || sharedOptions !== previouslySharedOptions;
+        this.updateSharedOptions(sharedOptions, mode, firstOpts);
+        return {
+            sharedOptions,
+            includeOptions
+        };
+    }
+ updateElement(element, index, properties, mode) {
+        if (isDirectUpdateMode(mode)) {
+            Object.assign(element, properties);
+        } else {
+            this._resolveAnimations(index, mode).update(element, properties);
+        }
+    }
+ updateSharedOptions(sharedOptions, mode, newOptions) {
+        if (sharedOptions && !isDirectUpdateMode(mode)) {
+            this._resolveAnimations(undefined, mode).update(sharedOptions, newOptions);
+        }
+    }
+ _setStyle(element, index, mode, active) {
+        element.active = active;
+        const options = this.getStyle(index, active);
+        this._resolveAnimations(index, mode, active).update(element, {
+            options: !active && this.getSharedOptions(options) || options
+        });
+    }
+    removeHoverStyle(element, datasetIndex, index) {
+        this._setStyle(element, index, 'active', false);
+    }
+    setHoverStyle(element, datasetIndex, index) {
+        this._setStyle(element, index, 'active', true);
+    }
+ _removeDatasetHoverStyle() {
+        const element = this._cachedMeta.dataset;
+        if (element) {
+            this._setStyle(element, undefined, 'active', false);
+        }
+    }
+ _setDatasetHoverStyle() {
+        const element = this._cachedMeta.dataset;
+        if (element) {
+            this._setStyle(element, undefined, 'active', true);
+        }
+    }
+ _resyncElements(resetNewElements) {
+        const data = this._data;
+        const elements = this._cachedMeta.data;
+        for (const [method, arg1, arg2] of this._syncList){
+            this[method](arg1, arg2);
+        }
+        this._syncList = [];
+        const numMeta = elements.length;
+        const numData = data.length;
+        const count = Math.min(numData, numMeta);
+        if (count) {
+            this.parse(0, count);
+        }
+        if (numData > numMeta) {
+            this._insertElements(numMeta, numData - numMeta, resetNewElements);
+        } else if (numData < numMeta) {
+            this._removeElements(numData, numMeta - numData);
+        }
+    }
+ _insertElements(start, count, resetNewElements = true) {
+        const meta = this._cachedMeta;
+        const data = meta.data;
+        const end = start + count;
+        let i;
+        const move = (arr)=>{
+            arr.length += count;
+            for(i = arr.length - 1; i >= end; i--){
+                arr[i] = arr[i - count];
+            }
+        };
+        move(data);
+        for(i = start; i < end; ++i){
+            data[i] = new this.dataElementType();
+        }
+        if (this._parsing) {
+            move(meta._parsed);
+        }
+        this.parse(start, count);
+        if (resetNewElements) {
+            this.updateElements(data, start, count, 'reset');
+        }
+    }
+    updateElements(element, start, count, mode) {}
+ _removeElements(start, count) {
+        const meta = this._cachedMeta;
+        if (this._parsing) {
+            const removed = meta._parsed.splice(start, count);
+            if (meta._stacked) {
+                clearStacks(meta, removed);
+            }
+        }
+        meta.data.splice(start, count);
+    }
+ _sync(args) {
+        if (this._parsing) {
+            this._syncList.push(args);
+        } else {
+            const [method, arg1, arg2] = args;
+            this[method](arg1, arg2);
+        }
+        this.chart._dataChanges.push([
+            this.index,
+            ...args
+        ]);
+    }
+    _onDataPush() {
+        const count = arguments.length;
+        this._sync([
+            '_insertElements',
+            this.getDataset().data.length - count,
+            count
+        ]);
+    }
+    _onDataPop() {
+        this._sync([
+            '_removeElements',
+            this._cachedMeta.data.length - 1,
+            1
+        ]);
+    }
+    _onDataShift() {
+        this._sync([
+            '_removeElements',
+            0,
+            1
+        ]);
+    }
+    _onDataSplice(start, count) {
+        if (count) {
+            this._sync([
+                '_removeElements',
+                start,
+                count
+            ]);
+        }
+        const newCount = arguments.length - 2;
+        if (newCount) {
+            this._sync([
+                '_insertElements',
+                start,
+                newCount
+            ]);
+        }
+    }
+    _onDataUnshift() {
+        this._sync([
+            '_insertElements',
+            0,
+            arguments.length
+        ]);
+    }
+}
+
+function getAllScaleValues(scale, type) {
+    if (!scale._cache.$bar) {
+        const visibleMetas = scale.getMatchingVisibleMetas(type);
+        let values = [];
+        for(let i = 0, ilen = visibleMetas.length; i < ilen; i++){
+            values = values.concat(visibleMetas[i].controller.getAllParsedValues(scale));
+        }
+        scale._cache.$bar = _arrayUnique(values.sort((a, b)=>a - b));
+    }
+    return scale._cache.$bar;
+}
+ function computeMinSampleSize(meta) {
+    const scale = meta.iScale;
+    const values = getAllScaleValues(scale, meta.type);
+    let min = scale._length;
+    let i, ilen, curr, prev;
+    const updateMinAndPrev = ()=>{
+        if (curr === 32767 || curr === -32768) {
+            return;
+        }
+        if (defined(prev)) {
+            min = Math.min(min, Math.abs(curr - prev) || min);
+        }
+        prev = curr;
+    };
+    for(i = 0, ilen = values.length; i < ilen; ++i){
+        curr = scale.getPixelForValue(values[i]);
+        updateMinAndPrev();
+    }
+    prev = undefined;
+    for(i = 0, ilen = scale.ticks.length; i < ilen; ++i){
+        curr = scale.getPixelForTick(i);
+        updateMinAndPrev();
+    }
+    return min;
+}
+ function computeFitCategoryTraits(index, ruler, options, stackCount) {
+    const thickness = options.barThickness;
+    let size, ratio;
+    if (isNullOrUndef(thickness)) {
+        size = ruler.min * options.categoryPercentage;
+        ratio = options.barPercentage;
+    } else {
+        size = thickness * stackCount;
+        ratio = 1;
+    }
+    return {
+        chunk: size / stackCount,
+        ratio,
+        start: ruler.pixels[index] - size / 2
+    };
+}
+ function computeFlexCategoryTraits(index, ruler, options, stackCount) {
+    const pixels = ruler.pixels;
+    const curr = pixels[index];
+    let prev = index > 0 ? pixels[index - 1] : null;
+    let next = index < pixels.length - 1 ? pixels[index + 1] : null;
+    const percent = options.categoryPercentage;
+    if (prev === null) {
+        prev = curr - (next === null ? ruler.end - ruler.start : next - curr);
+    }
+    if (next === null) {
+        next = curr + curr - prev;
+    }
+    const start = curr - (curr - Math.min(prev, next)) / 2 * percent;
+    const size = Math.abs(next - prev) / 2 * percent;
+    return {
+        chunk: size / stackCount,
+        ratio: options.barPercentage,
+        start
+    };
+}
+function parseFloatBar(entry, item, vScale, i) {
+    const startValue = vScale.parse(entry[0], i);
+    const endValue = vScale.parse(entry[1], i);
+    const min = Math.min(startValue, endValue);
+    const max = Math.max(startValue, endValue);
+    let barStart = min;
+    let barEnd = max;
+    if (Math.abs(min) > Math.abs(max)) {
+        barStart = max;
+        barEnd = min;
+    }
+    item[vScale.axis] = barEnd;
+    item._custom = {
+        barStart,
+        barEnd,
+        start: startValue,
+        end: endValue,
+        min,
+        max
+    };
+}
+function parseValue(entry, item, vScale, i) {
+    if (isArray(entry)) {
+        parseFloatBar(entry, item, vScale, i);
+    } else {
+        item[vScale.axis] = vScale.parse(entry, i);
+    }
+    return item;
+}
+function parseArrayOrPrimitive(meta, data, start, count) {
+    const iScale = meta.iScale;
+    const vScale = meta.vScale;
+    const labels = iScale.getLabels();
+    const singleScale = iScale === vScale;
+    const parsed = [];
+    let i, ilen, item, entry;
+    for(i = start, ilen = start + count; i < ilen; ++i){
+        entry = data[i];
+        item = {};
+        item[iScale.axis] = singleScale || iScale.parse(labels[i], i);
+        parsed.push(parseValue(entry, item, vScale, i));
+    }
+    return parsed;
+}
+function isFloatBar(custom) {
+    return custom && custom.barStart !== undefined && custom.barEnd !== undefined;
+}
+function barSign(size, vScale, actualBase) {
+    if (size !== 0) {
+        return sign(size);
+    }
+    return (vScale.isHorizontal() ? 1 : -1) * (vScale.min >= actualBase ? 1 : -1);
+}
+function borderProps(properties) {
+    let reverse, start, end, top, bottom;
+    if (properties.horizontal) {
+        reverse = properties.base > properties.x;
+        start = 'left';
+        end = 'right';
+    } else {
+        reverse = properties.base < properties.y;
+        start = 'bottom';
+        end = 'top';
+    }
+    if (reverse) {
+        top = 'end';
+        bottom = 'start';
+    } else {
+        top = 'start';
+        bottom = 'end';
+    }
+    return {
+        start,
+        end,
+        reverse,
+        top,
+        bottom
+    };
+}
+function setBorderSkipped(properties, options, stack, index) {
+    let edge = options.borderSkipped;
+    const res = {};
+    if (!edge) {
+        properties.borderSkipped = res;
+        return;
+    }
+    if (edge === true) {
+        properties.borderSkipped = {
+            top: true,
+            right: true,
+            bottom: true,
+            left: true
+        };
+        return;
+    }
+    const { start , end , reverse , top , bottom  } = borderProps(properties);
+    if (edge === 'middle' && stack) {
+        properties.enableBorderRadius = true;
+        if ((stack._top || 0) === index) {
+            edge = top;
+        } else if ((stack._bottom || 0) === index) {
+            edge = bottom;
+        } else {
+            res[parseEdge(bottom, start, end, reverse)] = true;
+            edge = top;
+        }
+    }
+    res[parseEdge(edge, start, end, reverse)] = true;
+    properties.borderSkipped = res;
+}
+function parseEdge(edge, a, b, reverse) {
+    if (reverse) {
+        edge = swap(edge, a, b);
+        edge = startEnd(edge, b, a);
+    } else {
+        edge = startEnd(edge, a, b);
+    }
+    return edge;
+}
+function swap(orig, v1, v2) {
+    return orig === v1 ? v2 : orig === v2 ? v1 : orig;
+}
+function startEnd(v, start, end) {
+    return v === 'start' ? start : v === 'end' ? end : v;
+}
+function setInflateAmount(properties, { inflateAmount  }, ratio) {
+    properties.inflateAmount = inflateAmount === 'auto' ? ratio === 1 ? 0.33 : 0 : inflateAmount;
+}
+class BarController extends DatasetController {
+    static id = 'bar';
+ static defaults = {
+        datasetElementType: false,
+        dataElementType: 'bar',
+        categoryPercentage: 0.8,
+        barPercentage: 0.9,
+        grouped: true,
+        animations: {
+            numbers: {
+                type: 'number',
+                properties: [
+                    'x',
+                    'y',
+                    'base',
+                    'width',
+                    'height'
+                ]
+            }
+        }
+    };
+ static overrides = {
+        scales: {
+            _index_: {
+                type: 'category',
+                offset: true,
+                grid: {
+                    offset: true
+                }
+            },
+            _value_: {
+                type: 'linear',
+                beginAtZero: true
+            }
+        }
+    };
+ parsePrimitiveData(meta, data, start, count) {
+        return parseArrayOrPrimitive(meta, data, start, count);
+    }
+ parseArrayData(meta, data, start, count) {
+        return parseArrayOrPrimitive(meta, data, start, count);
+    }
+ parseObjectData(meta, data, start, count) {
+        const { iScale , vScale  } = meta;
+        const { xAxisKey ='x' , yAxisKey ='y'  } = this._parsing;
+        const iAxisKey = iScale.axis === 'x' ? xAxisKey : yAxisKey;
+        const vAxisKey = vScale.axis === 'x' ? xAxisKey : yAxisKey;
+        const parsed = [];
+        let i, ilen, item, obj;
+        for(i = start, ilen = start + count; i < ilen; ++i){
+            obj = data[i];
+            item = {};
+            item[iScale.axis] = iScale.parse(resolveObjectKey(obj, iAxisKey), i);
+            parsed.push(parseValue(resolveObjectKey(obj, vAxisKey), item, vScale, i));
+        }
+        return parsed;
+    }
+ updateRangeFromParsed(range, scale, parsed, stack) {
+        super.updateRangeFromParsed(range, scale, parsed, stack);
+        const custom = parsed._custom;
+        if (custom && scale === this._cachedMeta.vScale) {
+            range.min = Math.min(range.min, custom.min);
+            range.max = Math.max(range.max, custom.max);
+        }
+    }
+ getMaxOverflow() {
+        return 0;
+    }
+ getLabelAndValue(index) {
+        const meta = this._cachedMeta;
+        const { iScale , vScale  } = meta;
+        const parsed = this.getParsed(index);
+        const custom = parsed._custom;
+        const value = isFloatBar(custom) ? '[' + custom.start + ', ' + custom.end + ']' : '' + vScale.getLabelForValue(parsed[vScale.axis]);
+        return {
+            label: '' + iScale.getLabelForValue(parsed[iScale.axis]),
+            value
+        };
+    }
+    initialize() {
+        this.enableOptionSharing = true;
+        super.initialize();
+        const meta = this._cachedMeta;
+        meta.stack = this.getDataset().stack;
+    }
+    update(mode) {
+        const meta = this._cachedMeta;
+        this.updateElements(meta.data, 0, meta.data.length, mode);
+    }
+    updateElements(bars, start, count, mode) {
+        const reset = mode === 'reset';
+        const { index , _cachedMeta: { vScale  }  } = this;
+        const base = vScale.getBasePixel();
+        const horizontal = vScale.isHorizontal();
+        const ruler = this._getRuler();
+        const { sharedOptions , includeOptions  } = this._getSharedOptions(start, mode);
+        for(let i = start; i < start + count; i++){
+            const parsed = this.getParsed(i);
+            const vpixels = reset || isNullOrUndef(parsed[vScale.axis]) ? {
+                base,
+                head: base
+            } : this._calculateBarValuePixels(i);
+            const ipixels = this._calculateBarIndexPixels(i, ruler);
+            const stack = (parsed._stacks || {})[vScale.axis];
+            const properties = {
+                horizontal,
+                base: vpixels.base,
+                enableBorderRadius: !stack || isFloatBar(parsed._custom) || index === stack._top || index === stack._bottom,
+                x: horizontal ? vpixels.head : ipixels.center,
+                y: horizontal ? ipixels.center : vpixels.head,
+                height: horizontal ? ipixels.size : Math.abs(vpixels.size),
+                width: horizontal ? Math.abs(vpixels.size) : ipixels.size
+            };
+            if (includeOptions) {
+                properties.options = sharedOptions || this.resolveDataElementOptions(i, bars[i].active ? 'active' : mode);
+            }
+            const options = properties.options || bars[i].options;
+            setBorderSkipped(properties, options, stack, index);
+            setInflateAmount(properties, options, ruler.ratio);
+            this.updateElement(bars[i], i, properties, mode);
+        }
+    }
+ _getStacks(last, dataIndex) {
+        const { iScale  } = this._cachedMeta;
+        const metasets = iScale.getMatchingVisibleMetas(this._type).filter((meta)=>meta.controller.options.grouped);
+        const stacked = iScale.options.stacked;
+        const stacks = [];
+        const currentParsed = this._cachedMeta.controller.getParsed(dataIndex);
+        const iScaleValue = currentParsed && currentParsed[iScale.axis];
+        const skipNull = (meta)=>{
+            const parsed = meta._parsed.find((item)=>item[iScale.axis] === iScaleValue);
+            const val = parsed && parsed[meta.vScale.axis];
+            if (isNullOrUndef(val) || isNaN(val)) {
+                return true;
+            }
+        };
+        for (const meta of metasets){
+            if (dataIndex !== undefined && skipNull(meta)) {
+                continue;
+            }
+            if (stacked === false || stacks.indexOf(meta.stack) === -1 || stacked === undefined && meta.stack === undefined) {
+                stacks.push(meta.stack);
+            }
+            if (meta.index === last) {
+                break;
+            }
+        }
+        if (!stacks.length) {
+            stacks.push(undefined);
+        }
+        return stacks;
+    }
+ _getStackCount(index) {
+        return this._getStacks(undefined, index).length;
+    }
+    _getAxisCount() {
+        return this._getAxis().length;
+    }
+    getFirstScaleIdForIndexAxis() {
+        const scales = this.chart.scales;
+        const indexScaleId = this.chart.options.indexAxis;
+        return Object.keys(scales).filter((key)=>scales[key].axis === indexScaleId).shift();
+    }
+    _getAxis() {
+        const axis = {};
+        const firstScaleAxisId = this.getFirstScaleIdForIndexAxis();
+        for (const dataset of this.chart.data.datasets){
+            axis[valueOrDefault(this.chart.options.indexAxis === 'x' ? dataset.xAxisID : dataset.yAxisID, firstScaleAxisId)] = true;
+        }
+        return Object.keys(axis);
+    }
+ _getStackIndex(datasetIndex, name, dataIndex) {
+        const stacks = this._getStacks(datasetIndex, dataIndex);
+        const index = name !== undefined ? stacks.indexOf(name) : -1;
+        return index === -1 ? stacks.length - 1 : index;
+    }
+ _getRuler() {
+        const opts = this.options;
+        const meta = this._cachedMeta;
+        const iScale = meta.iScale;
+        const pixels = [];
+        let i, ilen;
+        for(i = 0, ilen = meta.data.length; i < ilen; ++i){
+            pixels.push(iScale.getPixelForValue(this.getParsed(i)[iScale.axis], i));
+        }
+        const barThickness = opts.barThickness;
+        const min = barThickness || computeMinSampleSize(meta);
+        return {
+            min,
+            pixels,
+            start: iScale._startPixel,
+            end: iScale._endPixel,
+            stackCount: this._getStackCount(),
+            scale: iScale,
+            grouped: opts.grouped,
+            ratio: barThickness ? 1 : opts.categoryPercentage * opts.barPercentage
+        };
+    }
+ _calculateBarValuePixels(index) {
+        const { _cachedMeta: { vScale , _stacked , index: datasetIndex  } , options: { base: baseValue , minBarLength  }  } = this;
+        const actualBase = baseValue || 0;
+        const parsed = this.getParsed(index);
+        const custom = parsed._custom;
+        const floating = isFloatBar(custom);
+        let value = parsed[vScale.axis];
+        let start = 0;
+        let length = _stacked ? this.applyStack(vScale, parsed, _stacked) : value;
+        let head, size;
+        if (length !== value) {
+            start = length - value;
+            length = value;
+        }
+        if (floating) {
+            value = custom.barStart;
+            length = custom.barEnd - custom.barStart;
+            if (value !== 0 && sign(value) !== sign(custom.barEnd)) {
+                start = 0;
+            }
+            start += value;
+        }
+        const startValue = !isNullOrUndef(baseValue) && !floating ? baseValue : start;
+        let base = vScale.getPixelForValue(startValue);
+        if (this.chart.getDataVisibility(index)) {
+            head = vScale.getPixelForValue(start + length);
+        } else {
+            head = base;
+        }
+        size = head - base;
+        if (Math.abs(size) < minBarLength) {
+            size = barSign(size, vScale, actualBase) * minBarLength;
+            if (value === actualBase) {
+                base -= size / 2;
+            }
+            const startPixel = vScale.getPixelForDecimal(0);
+            const endPixel = vScale.getPixelForDecimal(1);
+            const min = Math.min(startPixel, endPixel);
+            const max = Math.max(startPixel, endPixel);
+            base = Math.max(Math.min(base, max), min);
+            head = base + size;
+            if (_stacked && !floating) {
+                parsed._stacks[vScale.axis]._visualValues[datasetIndex] = vScale.getValueForPixel(head) - vScale.getValueForPixel(base);
+            }
+        }
+        if (base === vScale.getPixelForValue(actualBase)) {
+            const halfGrid = sign(size) * vScale.getLineWidthForValue(actualBase) / 2;
+            base += halfGrid;
+            size -= halfGrid;
+        }
+        return {
+            size,
+            base,
+            head,
+            center: head + size / 2
+        };
+    }
+ _calculateBarIndexPixels(index, ruler) {
+        const scale = ruler.scale;
+        const options = this.options;
+        const skipNull = options.skipNull;
+        const maxBarThickness = valueOrDefault(options.maxBarThickness, Infinity);
+        let center, size;
+        const axisCount = this._getAxisCount();
+        if (ruler.grouped) {
+            const stackCount = skipNull ? this._getStackCount(index) : ruler.stackCount;
+            const range = options.barThickness === 'flex' ? computeFlexCategoryTraits(index, ruler, options, stackCount * axisCount) : computeFitCategoryTraits(index, ruler, options, stackCount * axisCount);
+            const axisID = this.chart.options.indexAxis === 'x' ? this.getDataset().xAxisID : this.getDataset().yAxisID;
+            const axisNumber = this._getAxis().indexOf(valueOrDefault(axisID, this.getFirstScaleIdForIndexAxis()));
+            const stackIndex = this._getStackIndex(this.index, this._cachedMeta.stack, skipNull ? index : undefined) + axisNumber;
+            center = range.start + range.chunk * stackIndex + range.chunk / 2;
+            size = Math.min(maxBarThickness, range.chunk * range.ratio);
+        } else {
+            center = scale.getPixelForValue(this.getParsed(index)[scale.axis], index);
+            size = Math.min(maxBarThickness, ruler.min * ruler.ratio);
+        }
+        return {
+            base: center - size / 2,
+            head: center + size / 2,
+            center,
+            size
+        };
+    }
+    draw() {
+        const meta = this._cachedMeta;
+        const vScale = meta.vScale;
+        const rects = meta.data;
+        const ilen = rects.length;
+        let i = 0;
+        for(; i < ilen; ++i){
+            if (this.getParsed(i)[vScale.axis] !== null && !rects[i].hidden) {
+                rects[i].draw(this._ctx);
+            }
+        }
+    }
+}
+
+class BubbleController extends DatasetController {
+    static id = 'bubble';
+ static defaults = {
+        datasetElementType: false,
+        dataElementType: 'point',
+        animations: {
+            numbers: {
+                type: 'number',
+                properties: [
+                    'x',
+                    'y',
+                    'borderWidth',
+                    'radius'
+                ]
+            }
+        }
+    };
+ static overrides = {
+        scales: {
+            x: {
+                type: 'linear'
+            },
+            y: {
+                type: 'linear'
+            }
+        }
+    };
+    initialize() {
+        this.enableOptionSharing = true;
+        super.initialize();
+    }
+ parsePrimitiveData(meta, data, start, count) {
+        const parsed = super.parsePrimitiveData(meta, data, start, count);
+        for(let i = 0; i < parsed.length; i++){
+            parsed[i]._custom = this.resolveDataElementOptions(i + start).radius;
+        }
+        return parsed;
+    }
+ parseArrayData(meta, data, start, count) {
+        const parsed = super.parseArrayData(meta, data, start, count);
+        for(let i = 0; i < parsed.length; i++){
+            const item = data[start + i];
+            parsed[i]._custom = valueOrDefault(item[2], this.resolveDataElementOptions(i + start).radius);
+        }
+        return parsed;
+    }
+ parseObjectData(meta, data, start, count) {
+        const parsed = super.parseObjectData(meta, data, start, count);
+        for(let i = 0; i < parsed.length; i++){
+            const item = data[start + i];
+            parsed[i]._custom = valueOrDefault(item && item.r && +item.r, this.resolveDataElementOptions(i + start).radius);
+        }
+        return parsed;
+    }
+ getMaxOverflow() {
+        const data = this._cachedMeta.data;
+        let max = 0;
+        for(let i = data.length - 1; i >= 0; --i){
+            max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);
+        }
+        return max > 0 && max;
+    }
+ getLabelAndValue(index) {
+        const meta = this._cachedMeta;
+        const labels = this.chart.data.labels || [];
+        const { xScale , yScale  } = meta;
+        const parsed = this.getParsed(index);
+        const x = xScale.getLabelForValue(parsed.x);
+        const y = yScale.getLabelForValue(parsed.y);
+        const r = parsed._custom;
+        return {
+            label: labels[index] || '',
+            value: '(' + x + ', ' + y + (r ? ', ' + r : '') + ')'
+        };
+    }
+    update(mode) {
+        const points = this._cachedMeta.data;
+        this.updateElements(points, 0, points.length, mode);
+    }
+    updateElements(points, start, count, mode) {
+        const reset = mode === 'reset';
+        const { iScale , vScale  } = this._cachedMeta;
+        const { sharedOptions , includeOptions  } = this._getSharedOptions(start, mode);
+        const iAxis = iScale.axis;
+        const vAxis = vScale.axis;
+        for(let i = start; i < start + count; i++){
+            const point = points[i];
+            const parsed = !reset && this.getParsed(i);
+            const properties = {};
+            const iPixel = properties[iAxis] = reset ? iScale.getPixelForDecimal(0.5) : iScale.getPixelForValue(parsed[iAxis]);
+            const vPixel = properties[vAxis] = reset ? vScale.getBasePixel() : vScale.getPixelForValue(parsed[vAxis]);
+            properties.skip = isNaN(iPixel) || isNaN(vPixel);
+            if (includeOptions) {
+                properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
+                if (reset) {
+                    properties.options.radius = 0;
+                }
+            }
+            this.updateElement(point, i, properties, mode);
+        }
+    }
+ resolveDataElementOptions(index, mode) {
+        const parsed = this.getParsed(index);
+        let values = super.resolveDataElementOptions(index, mode);
+        if (values.$shared) {
+            values = Object.assign({}, values, {
+                $shared: false
+            });
+        }
+        const radius = values.radius;
+        if (mode !== 'active') {
+            values.radius = 0;
+        }
+        values.radius += valueOrDefault(parsed && parsed._custom, radius);
+        return values;
+    }
+}
+
+function getRatioAndOffset(rotation, circumference, cutout) {
+    let ratioX = 1;
+    let ratioY = 1;
+    let offsetX = 0;
+    let offsetY = 0;
+    if (circumference < TAU) {
+        const startAngle = rotation;
+        const endAngle = startAngle + circumference;
+        const startX = Math.cos(startAngle);
+        const startY = Math.sin(startAngle);
+        const endX = Math.cos(endAngle);
+        const endY = Math.sin(endAngle);
+        const calcMax = (angle, a, b)=>_angleBetween(angle, startAngle, endAngle, true) ? 1 : Math.max(a, a * cutout, b, b * cutout);
+        const calcMin = (angle, a, b)=>_angleBetween(angle, startAngle, endAngle, true) ? -1 : Math.min(a, a * cutout, b, b * cutout);
+        const maxX = calcMax(0, startX, endX);
+        const maxY = calcMax(HALF_PI, startY, endY);
+        const minX = calcMin(PI, startX, endX);
+        const minY = calcMin(PI + HALF_PI, startY, endY);
+        ratioX = (maxX - minX) / 2;
+        ratioY = (maxY - minY) / 2;
+        offsetX = -(maxX + minX) / 2;
+        offsetY = -(maxY + minY) / 2;
+    }
+    return {
+        ratioX,
+        ratioY,
+        offsetX,
+        offsetY
+    };
+}
+class DoughnutController extends DatasetController {
+    static id = 'doughnut';
+ static defaults = {
+        datasetElementType: false,
+        dataElementType: 'arc',
+        animation: {
+            animateRotate: true,
+            animateScale: false
+        },
+        animations: {
+            numbers: {
+                type: 'number',
+                properties: [
+                    'circumference',
+                    'endAngle',
+                    'innerRadius',
+                    'outerRadius',
+                    'startAngle',
+                    'x',
+                    'y',
+                    'offset',
+                    'borderWidth',
+                    'spacing'
+                ]
+            }
+        },
+        cutout: '50%',
+        rotation: 0,
+        circumference: 360,
+        radius: '100%',
+        spacing: 0,
+        indexAxis: 'r'
+    };
+    static descriptors = {
+        _scriptable: (name)=>name !== 'spacing',
+        _indexable: (name)=>name !== 'spacing' && !name.startsWith('borderDash') && !name.startsWith('hoverBorderDash')
+    };
+ static overrides = {
+        aspectRatio: 1,
+        plugins: {
+            legend: {
+                labels: {
+                    generateLabels (chart) {
+                        const data = chart.data;
+                        if (data.labels.length && data.datasets.length) {
+                            const { labels: { pointStyle , color  }  } = chart.legend.options;
+                            return data.labels.map((label, i)=>{
+                                const meta = chart.getDatasetMeta(0);
+                                const style = meta.controller.getStyle(i);
+                                return {
+                                    text: label,
+                                    fillStyle: style.backgroundColor,
+                                    strokeStyle: style.borderColor,
+                                    fontColor: color,
+                                    lineWidth: style.borderWidth,
+                                    pointStyle: pointStyle,
+                                    hidden: !chart.getDataVisibility(i),
+                                    index: i
+                                };
+                            });
+                        }
+                        return [];
+                    }
+                },
+                onClick (e, legendItem, legend) {
+                    legend.chart.toggleDataVisibility(legendItem.index);
+                    legend.chart.update();
+                }
+            }
+        }
+    };
+    constructor(chart, datasetIndex){
+        super(chart, datasetIndex);
+        this.enableOptionSharing = true;
+        this.innerRadius = undefined;
+        this.outerRadius = undefined;
+        this.offsetX = undefined;
+        this.offsetY = undefined;
+    }
+    linkScales() {}
+ parse(start, count) {
+        const data = this.getDataset().data;
+        const meta = this._cachedMeta;
+        if (this._parsing === false) {
+            meta._parsed = data;
+        } else {
+            let getter = (i)=>+data[i];
+            if (isObject(data[start])) {
+                const { key ='value'  } = this._parsing;
+                getter = (i)=>+resolveObjectKey(data[i], key);
+            }
+            let i, ilen;
+            for(i = start, ilen = start + count; i < ilen; ++i){
+                meta._parsed[i] = getter(i);
+            }
+        }
+    }
+ _getRotation() {
+        return toRadians(this.options.rotation - 90);
+    }
+ _getCircumference() {
+        return toRadians(this.options.circumference);
+    }
+ _getRotationExtents() {
+        let min = TAU;
+        let max = -TAU;
+        for(let i = 0; i < this.chart.data.datasets.length; ++i){
+            if (this.chart.isDatasetVisible(i) && this.chart.getDatasetMeta(i).type === this._type) {
+                const controller = this.chart.getDatasetMeta(i).controller;
+                const rotation = controller._getRotation();
+                const circumference = controller._getCircumference();
+                min = Math.min(min, rotation);
+                max = Math.max(max, rotation + circumference);
+            }
+        }
+        return {
+            rotation: min,
+            circumference: max - min
+        };
+    }
+ update(mode) {
+        const chart = this.chart;
+        const { chartArea  } = chart;
+        const meta = this._cachedMeta;
+        const arcs = meta.data;
+        const spacing = this.getMaxBorderWidth() + this.getMaxOffset(arcs) + this.options.spacing;
+        const maxSize = Math.max((Math.min(chartArea.width, chartArea.height) - spacing) / 2, 0);
+        const cutout = Math.min(toPercentage(this.options.cutout, maxSize), 1);
+        const chartWeight = this._getRingWeight(this.index);
+        const { circumference , rotation  } = this._getRotationExtents();
+        const { ratioX , ratioY , offsetX , offsetY  } = getRatioAndOffset(rotation, circumference, cutout);
+        const maxWidth = (chartArea.width - spacing) / ratioX;
+        const maxHeight = (chartArea.height - spacing) / ratioY;
+        const maxRadius = Math.max(Math.min(maxWidth, maxHeight) / 2, 0);
+        const outerRadius = toDimension(this.options.radius, maxRadius);
+        const innerRadius = Math.max(outerRadius * cutout, 0);
+        const radiusLength = (outerRadius - innerRadius) / this._getVisibleDatasetWeightTotal();
+        this.offsetX = offsetX * outerRadius;
+        this.offsetY = offsetY * outerRadius;
+        meta.total = this.calculateTotal();
+        this.outerRadius = outerRadius - radiusLength * this._getRingWeightOffset(this.index);
+        this.innerRadius = Math.max(this.outerRadius - radiusLength * chartWeight, 0);
+        this.updateElements(arcs, 0, arcs.length, mode);
+    }
+ _circumference(i, reset) {
+        const opts = this.options;
+        const meta = this._cachedMeta;
+        const circumference = this._getCircumference();
+        if (reset && opts.animation.animateRotate || !this.chart.getDataVisibility(i) || meta._parsed[i] === null || meta.data[i].hidden) {
+            return 0;
+        }
+        return this.calculateCircumference(meta._parsed[i] * circumference / TAU);
+    }
+    updateElements(arcs, start, count, mode) {
+        const reset = mode === 'reset';
+        const chart = this.chart;
+        const chartArea = chart.chartArea;
+        const opts = chart.options;
+        const animationOpts = opts.animation;
+        const centerX = (chartArea.left + chartArea.right) / 2;
+        const centerY = (chartArea.top + chartArea.bottom) / 2;
+        const animateScale = reset && animationOpts.animateScale;
+        const innerRadius = animateScale ? 0 : this.innerRadius;
+        const outerRadius = animateScale ? 0 : this.outerRadius;
+        const { sharedOptions , includeOptions  } = this._getSharedOptions(start, mode);
+        let startAngle = this._getRotation();
+        let i;
+        for(i = 0; i < start; ++i){
+            startAngle += this._circumference(i, reset);
+        }
+        for(i = start; i < start + count; ++i){
+            const circumference = this._circumference(i, reset);
+            const arc = arcs[i];
+            const properties = {
+                x: centerX + this.offsetX,
+                y: centerY + this.offsetY,
+                startAngle,
+                endAngle: startAngle + circumference,
+                circumference,
+                outerRadius,
+                innerRadius
+            };
+            if (includeOptions) {
+                properties.options = sharedOptions || this.resolveDataElementOptions(i, arc.active ? 'active' : mode);
+            }
+            startAngle += circumference;
+            this.updateElement(arc, i, properties, mode);
+        }
+    }
+    calculateTotal() {
+        const meta = this._cachedMeta;
+        const metaData = meta.data;
+        let total = 0;
+        let i;
+        for(i = 0; i < metaData.length; i++){
+            const value = meta._parsed[i];
+            if (value !== null && !isNaN(value) && this.chart.getDataVisibility(i) && !metaData[i].hidden) {
+                total += Math.abs(value);
+            }
+        }
+        return total;
+    }
+    calculateCircumference(value) {
+        const total = this._cachedMeta.total;
+        if (total > 0 && !isNaN(value)) {
+            return TAU * (Math.abs(value) / total);
+        }
+        return 0;
+    }
+    getLabelAndValue(index) {
+        const meta = this._cachedMeta;
+        const chart = this.chart;
+        const labels = chart.data.labels || [];
+        const value = formatNumber(meta._parsed[index], chart.options.locale);
+        return {
+            label: labels[index] || '',
+            value
+        };
+    }
+    getMaxBorderWidth(arcs) {
+        let max = 0;
+        const chart = this.chart;
+        let i, ilen, meta, controller, options;
+        if (!arcs) {
+            for(i = 0, ilen = chart.data.datasets.length; i < ilen; ++i){
+                if (chart.isDatasetVisible(i)) {
+                    meta = chart.getDatasetMeta(i);
+                    arcs = meta.data;
+                    controller = meta.controller;
+                    break;
+                }
+            }
+        }
+        if (!arcs) {
+            return 0;
+        }
+        for(i = 0, ilen = arcs.length; i < ilen; ++i){
+            options = controller.resolveDataElementOptions(i);
+            if (options.borderAlign !== 'inner') {
+                max = Math.max(max, options.borderWidth || 0, options.hoverBorderWidth || 0);
+            }
+        }
+        return max;
+    }
+    getMaxOffset(arcs) {
+        let max = 0;
+        for(let i = 0, ilen = arcs.length; i < ilen; ++i){
+            const options = this.resolveDataElementOptions(i);
+            max = Math.max(max, options.offset || 0, options.hoverOffset || 0);
+        }
+        return max;
+    }
+ _getRingWeightOffset(datasetIndex) {
+        let ringWeightOffset = 0;
+        for(let i = 0; i < datasetIndex; ++i){
+            if (this.chart.isDatasetVisible(i)) {
+                ringWeightOffset += this._getRingWeight(i);
+            }
+        }
+        return ringWeightOffset;
+    }
+ _getRingWeight(datasetIndex) {
+        return Math.max(valueOrDefault(this.chart.data.datasets[datasetIndex].weight, 1), 0);
+    }
+ _getVisibleDatasetWeightTotal() {
+        return this._getRingWeightOffset(this.chart.data.datasets.length) || 1;
+    }
+}
+
+class LineController extends DatasetController {
+    static id = 'line';
+ static defaults = {
+        datasetElementType: 'line',
+        dataElementType: 'point',
+        showLine: true,
+        spanGaps: false
+    };
+ static overrides = {
+        scales: {
+            _index_: {
+                type: 'category'
+            },
+            _value_: {
+                type: 'linear'
+            }
+        }
+    };
+    initialize() {
+        this.enableOptionSharing = true;
+        this.supportsDecimation = true;
+        super.initialize();
+    }
+    update(mode) {
+        const meta = this._cachedMeta;
+        const { dataset: line , data: points = [] , _dataset  } = meta;
+        const animationsDisabled = this.chart._animationsDisabled;
+        let { start , count  } = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);
+        this._drawStart = start;
+        this._drawCount = count;
+        if (_scaleRangesChanged(meta)) {
+            start = 0;
+            count = points.length;
+        }
+        line._chart = this.chart;
+        line._datasetIndex = this.index;
+        line._decimated = !!_dataset._decimated;
+        line.points = points;
+        const options = this.resolveDatasetElementOptions(mode);
+        if (!this.options.showLine) {
+            options.borderWidth = 0;
+        }
+        options.segment = this.options.segment;
+        this.updateElement(line, undefined, {
+            animated: !animationsDisabled,
+            options
+        }, mode);
+        this.updateElements(points, start, count, mode);
+    }
+    updateElements(points, start, count, mode) {
+        const reset = mode === 'reset';
+        const { iScale , vScale , _stacked , _dataset  } = this._cachedMeta;
+        const { sharedOptions , includeOptions  } = this._getSharedOptions(start, mode);
+        const iAxis = iScale.axis;
+        const vAxis = vScale.axis;
+        const { spanGaps , segment  } = this.options;
+        const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;
+        const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';
+        const end = start + count;
+        const pointsCount = points.length;
+        let prevParsed = start > 0 && this.getParsed(start - 1);
+        for(let i = 0; i < pointsCount; ++i){
+            const point = points[i];
+            const properties = directUpdate ? point : {};
+            if (i < start || i >= end) {
+                properties.skip = true;
+                continue;
+            }
+            const parsed = this.getParsed(i);
+            const nullData = isNullOrUndef(parsed[vAxis]);
+            const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);
+            const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);
+            properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;
+            properties.stop = i > 0 && Math.abs(parsed[iAxis] - prevParsed[iAxis]) > maxGapLength;
+            if (segment) {
+                properties.parsed = parsed;
+                properties.raw = _dataset.data[i];
+            }
+            if (includeOptions) {
+                properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
+            }
+            if (!directUpdate) {
+                this.updateElement(point, i, properties, mode);
+            }
+            prevParsed = parsed;
+        }
+    }
+ getMaxOverflow() {
+        const meta = this._cachedMeta;
+        const dataset = meta.dataset;
+        const border = dataset.options && dataset.options.borderWidth || 0;
+        const data = meta.data || [];
+        if (!data.length) {
+            return border;
+        }
+        const firstPoint = data[0].size(this.resolveDataElementOptions(0));
+        const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));
+        return Math.max(border, firstPoint, lastPoint) / 2;
+    }
+    draw() {
+        const meta = this._cachedMeta;
+        meta.dataset.updateControlPoints(this.chart.chartArea, meta.iScale.axis);
+        super.draw();
+    }
+}
+
+class PolarAreaController extends DatasetController {
+    static id = 'polarArea';
+ static defaults = {
+        dataElementType: 'arc',
+        animation: {
+            animateRotate: true,
+            animateScale: true
+        },
+        animations: {
+            numbers: {
+                type: 'number',
+                properties: [
+                    'x',
+                    'y',
+                    'startAngle',
+                    'endAngle',
+                    'innerRadius',
+                    'outerRadius'
+                ]
+            }
+        },
+        indexAxis: 'r',
+        startAngle: 0
+    };
+ static overrides = {
+        aspectRatio: 1,
+        plugins: {
+            legend: {
+                labels: {
+                    generateLabels (chart) {
+                        const data = chart.data;
+                        if (data.labels.length && data.datasets.length) {
+                            const { labels: { pointStyle , color  }  } = chart.legend.options;
+                            return data.labels.map((label, i)=>{
+                                const meta = chart.getDatasetMeta(0);
+                                const style = meta.controller.getStyle(i);
+                                return {
+                                    text: label,
+                                    fillStyle: style.backgroundColor,
+                                    strokeStyle: style.borderColor,
+                                    fontColor: color,
+                                    lineWidth: style.borderWidth,
+                                    pointStyle: pointStyle,
+                                    hidden: !chart.getDataVisibility(i),
+                                    index: i
+                                };
+                            });
+                        }
+                        return [];
+                    }
+                },
+                onClick (e, legendItem, legend) {
+                    legend.chart.toggleDataVisibility(legendItem.index);
+                    legend.chart.update();
+                }
+            }
+        },
+        scales: {
+            r: {
+                type: 'radialLinear',
+                angleLines: {
+                    display: false
+                },
+                beginAtZero: true,
+                grid: {
+                    circular: true
+                },
+                pointLabels: {
+                    display: false
+                },
+                startAngle: 0
+            }
+        }
+    };
+    constructor(chart, datasetIndex){
+        super(chart, datasetIndex);
+        this.innerRadius = undefined;
+        this.outerRadius = undefined;
+    }
+    getLabelAndValue(index) {
+        const meta = this._cachedMeta;
+        const chart = this.chart;
+        const labels = chart.data.labels || [];
+        const value = formatNumber(meta._parsed[index].r, chart.options.locale);
+        return {
+            label: labels[index] || '',
+            value
+        };
+    }
+    parseObjectData(meta, data, start, count) {
+        return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);
+    }
+    update(mode) {
+        const arcs = this._cachedMeta.data;
+        this._updateRadius();
+        this.updateElements(arcs, 0, arcs.length, mode);
+    }
+ getMinMax() {
+        const meta = this._cachedMeta;
+        const range = {
+            min: Number.POSITIVE_INFINITY,
+            max: Number.NEGATIVE_INFINITY
+        };
+        meta.data.forEach((element, index)=>{
+            const parsed = this.getParsed(index).r;
+            if (!isNaN(parsed) && this.chart.getDataVisibility(index)) {
+                if (parsed < range.min) {
+                    range.min = parsed;
+                }
+                if (parsed > range.max) {
+                    range.max = parsed;
+                }
+            }
+        });
+        return range;
+    }
+ _updateRadius() {
+        const chart = this.chart;
+        const chartArea = chart.chartArea;
+        const opts = chart.options;
+        const minSize = Math.min(chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);
+        const outerRadius = Math.max(minSize / 2, 0);
+        const innerRadius = Math.max(opts.cutoutPercentage ? outerRadius / 100 * opts.cutoutPercentage : 1, 0);
+        const radiusLength = (outerRadius - innerRadius) / chart.getVisibleDatasetCount();
+        this.outerRadius = outerRadius - radiusLength * this.index;
+        this.innerRadius = this.outerRadius - radiusLength;
+    }
+    updateElements(arcs, start, count, mode) {
+        const reset = mode === 'reset';
+        const chart = this.chart;
+        const opts = chart.options;
+        const animationOpts = opts.animation;
+        const scale = this._cachedMeta.rScale;
+        const centerX = scale.xCenter;
+        const centerY = scale.yCenter;
+        const datasetStartAngle = scale.getIndexAngle(0) - 0.5 * PI;
+        let angle = datasetStartAngle;
+        let i;
+        const defaultAngle = 360 / this.countVisibleElements();
+        for(i = 0; i < start; ++i){
+            angle += this._computeAngle(i, mode, defaultAngle);
+        }
+        for(i = start; i < start + count; i++){
+            const arc = arcs[i];
+            let startAngle = angle;
+            let endAngle = angle + this._computeAngle(i, mode, defaultAngle);
+            let outerRadius = chart.getDataVisibility(i) ? scale.getDistanceFromCenterForValue(this.getParsed(i).r) : 0;
+            angle = endAngle;
+            if (reset) {
+                if (animationOpts.animateScale) {
+                    outerRadius = 0;
+                }
+                if (animationOpts.animateRotate) {
+                    startAngle = endAngle = datasetStartAngle;
+                }
+            }
+            const properties = {
+                x: centerX,
+                y: centerY,
+                innerRadius: 0,
+                outerRadius,
+                startAngle,
+                endAngle,
+                options: this.resolveDataElementOptions(i, arc.active ? 'active' : mode)
+            };
+            this.updateElement(arc, i, properties, mode);
+        }
+    }
+    countVisibleElements() {
+        const meta = this._cachedMeta;
+        let count = 0;
+        meta.data.forEach((element, index)=>{
+            if (!isNaN(this.getParsed(index).r) && this.chart.getDataVisibility(index)) {
+                count++;
+            }
+        });
+        return count;
+    }
+ _computeAngle(index, mode, defaultAngle) {
+        return this.chart.getDataVisibility(index) ? toRadians(this.resolveDataElementOptions(index, mode).angle || defaultAngle) : 0;
+    }
+}
+
+class PieController extends DoughnutController {
+    static id = 'pie';
+ static defaults = {
+        cutout: 0,
+        rotation: 0,
+        circumference: 360,
+        radius: '100%'
+    };
+}
+
+class RadarController extends DatasetController {
+    static id = 'radar';
+ static defaults = {
+        datasetElementType: 'line',
+        dataElementType: 'point',
+        indexAxis: 'r',
+        showLine: true,
+        elements: {
+            line: {
+                fill: 'start'
+            }
+        }
+    };
+ static overrides = {
+        aspectRatio: 1,
+        scales: {
+            r: {
+                type: 'radialLinear'
+            }
+        }
+    };
+ getLabelAndValue(index) {
+        const vScale = this._cachedMeta.vScale;
+        const parsed = this.getParsed(index);
+        return {
+            label: vScale.getLabels()[index],
+            value: '' + vScale.getLabelForValue(parsed[vScale.axis])
+        };
+    }
+    parseObjectData(meta, data, start, count) {
+        return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);
+    }
+    update(mode) {
+        const meta = this._cachedMeta;
+        const line = meta.dataset;
+        const points = meta.data || [];
+        const labels = meta.iScale.getLabels();
+        line.points = points;
+        if (mode !== 'resize') {
+            const options = this.resolveDatasetElementOptions(mode);
+            if (!this.options.showLine) {
+                options.borderWidth = 0;
+            }
+            const properties = {
+                _loop: true,
+                _fullLoop: labels.length === points.length,
+                options
+            };
+            this.updateElement(line, undefined, properties, mode);
+        }
+        this.updateElements(points, 0, points.length, mode);
+    }
+    updateElements(points, start, count, mode) {
+        const scale = this._cachedMeta.rScale;
+        const reset = mode === 'reset';
+        for(let i = start; i < start + count; i++){
+            const point = points[i];
+            const options = this.resolveDataElementOptions(i, point.active ? 'active' : mode);
+            const pointPosition = scale.getPointPositionForValue(i, this.getParsed(i).r);
+            const x = reset ? scale.xCenter : pointPosition.x;
+            const y = reset ? scale.yCenter : pointPosition.y;
+            const properties = {
+                x,
+                y,
+                angle: pointPosition.angle,
+                skip: isNaN(x) || isNaN(y),
+                options
+            };
+            this.updateElement(point, i, properties, mode);
+        }
+    }
+}
+
+class ScatterController extends DatasetController {
+    static id = 'scatter';
+ static defaults = {
+        datasetElementType: false,
+        dataElementType: 'point',
+        showLine: false,
+        fill: false
+    };
+ static overrides = {
+        interaction: {
+            mode: 'point'
+        },
+        scales: {
+            x: {
+                type: 'linear'
+            },
+            y: {
+                type: 'linear'
+            }
+        }
+    };
+ getLabelAndValue(index) {
+        const meta = this._cachedMeta;
+        const labels = this.chart.data.labels || [];
+        const { xScale , yScale  } = meta;
+        const parsed = this.getParsed(index);
+        const x = xScale.getLabelForValue(parsed.x);
+        const y = yScale.getLabelForValue(parsed.y);
+        return {
+            label: labels[index] || '',
+            value: '(' + x + ', ' + y + ')'
+        };
+    }
+    update(mode) {
+        const meta = this._cachedMeta;
+        const { data: points = []  } = meta;
+        const animationsDisabled = this.chart._animationsDisabled;
+        let { start , count  } = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);
+        this._drawStart = start;
+        this._drawCount = count;
+        if (_scaleRangesChanged(meta)) {
+            start = 0;
+            count = points.length;
+        }
+        if (this.options.showLine) {
+            if (!this.datasetElementType) {
+                this.addElements();
+            }
+            const { dataset: line , _dataset  } = meta;
+            line._chart = this.chart;
+            line._datasetIndex = this.index;
+            line._decimated = !!_dataset._decimated;
+            line.points = points;
+            const options = this.resolveDatasetElementOptions(mode);
+            options.segment = this.options.segment;
+            this.updateElement(line, undefined, {
+                animated: !animationsDisabled,
+                options
+            }, mode);
+        } else if (this.datasetElementType) {
+            delete meta.dataset;
+            this.datasetElementType = false;
+        }
+        this.updateElements(points, start, count, mode);
+    }
+    addElements() {
+        const { showLine  } = this.options;
+        if (!this.datasetElementType && showLine) {
+            this.datasetElementType = this.chart.registry.getElement('line');
+        }
+        super.addElements();
+    }
+    updateElements(points, start, count, mode) {
+        const reset = mode === 'reset';
+        const { iScale , vScale , _stacked , _dataset  } = this._cachedMeta;
+        const firstOpts = this.resolveDataElementOptions(start, mode);
+        const sharedOptions = this.getSharedOptions(firstOpts);
+        const includeOptions = this.includeOptions(mode, sharedOptions);
+        const iAxis = iScale.axis;
+        const vAxis = vScale.axis;
+        const { spanGaps , segment  } = this.options;
+        const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;
+        const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';
+        let prevParsed = start > 0 && this.getParsed(start - 1);
+        for(let i = start; i < start + count; ++i){
+            const point = points[i];
+            const parsed = this.getParsed(i);
+            const properties = directUpdate ? point : {};
+            const nullData = isNullOrUndef(parsed[vAxis]);
+            const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);
+            const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);
+            properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;
+            properties.stop = i > 0 && Math.abs(parsed[iAxis] - prevParsed[iAxis]) > maxGapLength;
+            if (segment) {
+                properties.parsed = parsed;
+                properties.raw = _dataset.data[i];
+            }
+            if (includeOptions) {
+                properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);
+            }
+            if (!directUpdate) {
+                this.updateElement(point, i, properties, mode);
+            }
+            prevParsed = parsed;
+        }
+        this.updateSharedOptions(sharedOptions, mode, firstOpts);
+    }
+ getMaxOverflow() {
+        const meta = this._cachedMeta;
+        const data = meta.data || [];
+        if (!this.options.showLine) {
+            let max = 0;
+            for(let i = data.length - 1; i >= 0; --i){
+                max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);
+            }
+            return max > 0 && max;
+        }
+        const dataset = meta.dataset;
+        const border = dataset.options && dataset.options.borderWidth || 0;
+        if (!data.length) {
+            return border;
+        }
+        const firstPoint = data[0].size(this.resolveDataElementOptions(0));
+        const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));
+        return Math.max(border, firstPoint, lastPoint) / 2;
+    }
+}
+
+var controllers = /*#__PURE__*/Object.freeze({
+__proto__: null,
+BarController: BarController,
+BubbleController: BubbleController,
+DoughnutController: DoughnutController,
+LineController: LineController,
+PieController: PieController,
+PolarAreaController: PolarAreaController,
+RadarController: RadarController,
+ScatterController: ScatterController
+});
+
+/**
+ * @namespace Chart._adapters
+ * @since 2.8.0
+ * @private
+ */ function abstract() {
+    throw new Error('This method is not implemented: Check that a complete date adapter is provided.');
+}
+/**
+ * Date adapter (current used by the time scale)
+ * @namespace Chart._adapters._date
+ * @memberof Chart._adapters
+ * @private
+ */ class DateAdapterBase {
+    /**
+   * Override default date adapter methods.
+   * Accepts type parameter to define options type.
+   * @example
+   * Chart._adapters._date.override<{myAdapterOption: string}>({
+   *   init() {
+   *     console.log(this.options.myAdapterOption);
+   *   }
+   * })
+   */ static override(members) {
+        Object.assign(DateAdapterBase.prototype, members);
+    }
+    options;
+    constructor(options){
+        this.options = options || {};
+    }
+    // eslint-disable-next-line @typescript-eslint/no-empty-function
+    init() {}
+    formats() {
+        return abstract();
+    }
+    parse() {
+        return abstract();
+    }
+    format() {
+        return abstract();
+    }
+    add() {
+        return abstract();
+    }
+    diff() {
+        return abstract();
+    }
+    startOf() {
+        return abstract();
+    }
+    endOf() {
+        return abstract();
+    }
+}
+var adapters = {
+    _date: DateAdapterBase
+};
+
+function binarySearch(metaset, axis, value, intersect) {
+    const { controller , data , _sorted  } = metaset;
+    const iScale = controller._cachedMeta.iScale;
+    const spanGaps = metaset.dataset ? metaset.dataset.options ? metaset.dataset.options.spanGaps : null : null;
+    if (iScale && axis === iScale.axis && axis !== 'r' && _sorted && data.length) {
+        const lookupMethod = iScale._reversePixels ? _rlookupByKey : _lookupByKey;
+        if (!intersect) {
+            const result = lookupMethod(data, axis, value);
+            if (spanGaps) {
+                const { vScale  } = controller._cachedMeta;
+                const { _parsed  } = metaset;
+                const distanceToDefinedLo = _parsed.slice(0, result.lo + 1).reverse().findIndex((point)=>!isNullOrUndef(point[vScale.axis]));
+                result.lo -= Math.max(0, distanceToDefinedLo);
+                const distanceToDefinedHi = _parsed.slice(result.hi).findIndex((point)=>!isNullOrUndef(point[vScale.axis]));
+                result.hi += Math.max(0, distanceToDefinedHi);
+            }
+            return result;
+        } else if (controller._sharedOptions) {
+            const el = data[0];
+            const range = typeof el.getRange === 'function' && el.getRange(axis);
+            if (range) {
+                const start = lookupMethod(data, axis, value - range);
+                const end = lookupMethod(data, axis, value + range);
+                return {
+                    lo: start.lo,
+                    hi: end.hi
+                };
+            }
+        }
+    }
+    return {
+        lo: 0,
+        hi: data.length - 1
+    };
+}
+ function evaluateInteractionItems(chart, axis, position, handler, intersect) {
+    const metasets = chart.getSortedVisibleDatasetMetas();
+    const value = position[axis];
+    for(let i = 0, ilen = metasets.length; i < ilen; ++i){
+        const { index , data  } = metasets[i];
+        const { lo , hi  } = binarySearch(metasets[i], axis, value, intersect);
+        for(let j = lo; j <= hi; ++j){
+            const element = data[j];
+            if (!element.skip) {
+                handler(element, index, j);
+            }
+        }
+    }
+}
+ function getDistanceMetricForAxis(axis) {
+    const useX = axis.indexOf('x') !== -1;
+    const useY = axis.indexOf('y') !== -1;
+    return function(pt1, pt2) {
+        const deltaX = useX ? Math.abs(pt1.x - pt2.x) : 0;
+        const deltaY = useY ? Math.abs(pt1.y - pt2.y) : 0;
+        return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));
+    };
+}
+ function getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) {
+    const items = [];
+    if (!includeInvisible && !chart.isPointInArea(position)) {
+        return items;
+    }
+    const evaluationFunc = function(element, datasetIndex, index) {
+        if (!includeInvisible && !_isPointInArea(element, chart.chartArea, 0)) {
+            return;
+        }
+        if (element.inRange(position.x, position.y, useFinalPosition)) {
+            items.push({
+                element,
+                datasetIndex,
+                index
+            });
+        }
+    };
+    evaluateInteractionItems(chart, axis, position, evaluationFunc, true);
+    return items;
+}
+ function getNearestRadialItems(chart, position, axis, useFinalPosition) {
+    let items = [];
+    function evaluationFunc(element, datasetIndex, index) {
+        const { startAngle , endAngle  } = element.getProps([
+            'startAngle',
+            'endAngle'
+        ], useFinalPosition);
+        const { angle  } = getAngleFromPoint(element, {
+            x: position.x,
+            y: position.y
+        });
+        if (_angleBetween(angle, startAngle, endAngle)) {
+            items.push({
+                element,
+                datasetIndex,
+                index
+            });
+        }
+    }
+    evaluateInteractionItems(chart, axis, position, evaluationFunc);
+    return items;
+}
+ function getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {
+    let items = [];
+    const distanceMetric = getDistanceMetricForAxis(axis);
+    let minDistance = Number.POSITIVE_INFINITY;
+    function evaluationFunc(element, datasetIndex, index) {
+        const inRange = element.inRange(position.x, position.y, useFinalPosition);
+        if (intersect && !inRange) {
+            return;
+        }
+        const center = element.getCenterPoint(useFinalPosition);
+        const pointInArea = !!includeInvisible || chart.isPointInArea(center);
+        if (!pointInArea && !inRange) {
+            return;
+        }
+        const distance = distanceMetric(position, center);
+        if (distance < minDistance) {
+            items = [
+                {
+                    element,
+                    datasetIndex,
+                    index
+                }
+            ];
+            minDistance = distance;
+        } else if (distance === minDistance) {
+            items.push({
+                element,
+                datasetIndex,
+                index
+            });
+        }
+    }
+    evaluateInteractionItems(chart, axis, position, evaluationFunc);
+    return items;
+}
+ function getNearestItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {
+    if (!includeInvisible && !chart.isPointInArea(position)) {
+        return [];
+    }
+    return axis === 'r' && !intersect ? getNearestRadialItems(chart, position, axis, useFinalPosition) : getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible);
+}
+ function getAxisItems(chart, position, axis, intersect, useFinalPosition) {
+    const items = [];
+    const rangeMethod = axis === 'x' ? 'inXRange' : 'inYRange';
+    let intersectsItem = false;
+    evaluateInteractionItems(chart, axis, position, (element, datasetIndex, index)=>{
+        if (element[rangeMethod] && element[rangeMethod](position[axis], useFinalPosition)) {
+            items.push({
+                element,
+                datasetIndex,
+                index
+            });
+            intersectsItem = intersectsItem || element.inRange(position.x, position.y, useFinalPosition);
+        }
+    });
+    if (intersect && !intersectsItem) {
+        return [];
+    }
+    return items;
+}
+ var Interaction = {
+    evaluateInteractionItems,
+    modes: {
+ index (chart, e, options, useFinalPosition) {
+            const position = getRelativePosition(e, chart);
+            const axis = options.axis || 'x';
+            const includeInvisible = options.includeInvisible || false;
+            const items = options.intersect ? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) : getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);
+            const elements = [];
+            if (!items.length) {
+                return [];
+            }
+            chart.getSortedVisibleDatasetMetas().forEach((meta)=>{
+                const index = items[0].index;
+                const element = meta.data[index];
+                if (element && !element.skip) {
+                    elements.push({
+                        element,
+                        datasetIndex: meta.index,
+                        index
+                    });
+                }
+            });
+            return elements;
+        },
+ dataset (chart, e, options, useFinalPosition) {
+            const position = getRelativePosition(e, chart);
+            const axis = options.axis || 'xy';
+            const includeInvisible = options.includeInvisible || false;
+            let items = options.intersect ? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) : getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);
+            if (items.length > 0) {
+                const datasetIndex = items[0].datasetIndex;
+                const data = chart.getDatasetMeta(datasetIndex).data;
+                items = [];
+                for(let i = 0; i < data.length; ++i){
+                    items.push({
+                        element: data[i],
+                        datasetIndex,
+                        index: i
+                    });
+                }
+            }
+            return items;
+        },
+ point (chart, e, options, useFinalPosition) {
+            const position = getRelativePosition(e, chart);
+            const axis = options.axis || 'xy';
+            const includeInvisible = options.includeInvisible || false;
+            return getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible);
+        },
+ nearest (chart, e, options, useFinalPosition) {
+            const position = getRelativePosition(e, chart);
+            const axis = options.axis || 'xy';
+            const includeInvisible = options.includeInvisible || false;
+            return getNearestItems(chart, position, axis, options.intersect, useFinalPosition, includeInvisible);
+        },
+ x (chart, e, options, useFinalPosition) {
+            const position = getRelativePosition(e, chart);
+            return getAxisItems(chart, position, 'x', options.intersect, useFinalPosition);
+        },
+ y (chart, e, options, useFinalPosition) {
+            const position = getRelativePosition(e, chart);
+            return getAxisItems(chart, position, 'y', options.intersect, useFinalPosition);
+        }
+    }
+};
+
+const STATIC_POSITIONS = [
+    'left',
+    'top',
+    'right',
+    'bottom'
+];
+function filterByPosition(array, position) {
+    return array.filter((v)=>v.pos === position);
+}
+function filterDynamicPositionByAxis(array, axis) {
+    return array.filter((v)=>STATIC_POSITIONS.indexOf(v.pos) === -1 && v.box.axis === axis);
+}
+function sortByWeight(array, reverse) {
+    return array.sort((a, b)=>{
+        const v0 = reverse ? b : a;
+        const v1 = reverse ? a : b;
+        return v0.weight === v1.weight ? v0.index - v1.index : v0.weight - v1.weight;
+    });
+}
+function wrapBoxes(boxes) {
+    const layoutBoxes = [];
+    let i, ilen, box, pos, stack, stackWeight;
+    for(i = 0, ilen = (boxes || []).length; i < ilen; ++i){
+        box = boxes[i];
+        ({ position: pos , options: { stack , stackWeight =1  }  } = box);
+        layoutBoxes.push({
+            index: i,
+            box,
+            pos,
+            horizontal: box.isHorizontal(),
+            weight: box.weight,
+            stack: stack && pos + stack,
+            stackWeight
+        });
+    }
+    return layoutBoxes;
+}
+function buildStacks(layouts) {
+    const stacks = {};
+    for (const wrap of layouts){
+        const { stack , pos , stackWeight  } = wrap;
+        if (!stack || !STATIC_POSITIONS.includes(pos)) {
+            continue;
+        }
+        const _stack = stacks[stack] || (stacks[stack] = {
+            count: 0,
+            placed: 0,
+            weight: 0,
+            size: 0
+        });
+        _stack.count++;
+        _stack.weight += stackWeight;
+    }
+    return stacks;
+}
+ function setLayoutDims(layouts, params) {
+    const stacks = buildStacks(layouts);
+    const { vBoxMaxWidth , hBoxMaxHeight  } = params;
+    let i, ilen, layout;
+    for(i = 0, ilen = layouts.length; i < ilen; ++i){
+        layout = layouts[i];
+        const { fullSize  } = layout.box;
+        const stack = stacks[layout.stack];
+        const factor = stack && layout.stackWeight / stack.weight;
+        if (layout.horizontal) {
+            layout.width = factor ? factor * vBoxMaxWidth : fullSize && params.availableWidth;
+            layout.height = hBoxMaxHeight;
+        } else {
+            layout.width = vBoxMaxWidth;
+            layout.height = factor ? factor * hBoxMaxHeight : fullSize && params.availableHeight;
+        }
+    }
+    return stacks;
+}
+function buildLayoutBoxes(boxes) {
+    const layoutBoxes = wrapBoxes(boxes);
+    const fullSize = sortByWeight(layoutBoxes.filter((wrap)=>wrap.box.fullSize), true);
+    const left = sortByWeight(filterByPosition(layoutBoxes, 'left'), true);
+    const right = sortByWeight(filterByPosition(layoutBoxes, 'right'));
+    const top = sortByWeight(filterByPosition(layoutBoxes, 'top'), true);
+    const bottom = sortByWeight(filterByPosition(layoutBoxes, 'bottom'));
+    const centerHorizontal = filterDynamicPositionByAxis(layoutBoxes, 'x');
+    const centerVertical = filterDynamicPositionByAxis(layoutBoxes, 'y');
+    return {
+        fullSize,
+        leftAndTop: left.concat(top),
+        rightAndBottom: right.concat(centerVertical).concat(bottom).concat(centerHorizontal),
+        chartArea: filterByPosition(layoutBoxes, 'chartArea'),
+        vertical: left.concat(right).concat(centerVertical),
+        horizontal: top.concat(bottom).concat(centerHorizontal)
+    };
+}
+function getCombinedMax(maxPadding, chartArea, a, b) {
+    return Math.max(maxPadding[a], chartArea[a]) + Math.max(maxPadding[b], chartArea[b]);
+}
+function updateMaxPadding(maxPadding, boxPadding) {
+    maxPadding.top = Math.max(maxPadding.top, boxPadding.top);
+    maxPadding.left = Math.max(maxPadding.left, boxPadding.left);
+    maxPadding.bottom = Math.max(maxPadding.bottom, boxPadding.bottom);
+    maxPadding.right = Math.max(maxPadding.right, boxPadding.right);
+}
+function updateDims(chartArea, params, layout, stacks) {
+    const { pos , box  } = layout;
+    const maxPadding = chartArea.maxPadding;
+    if (!isObject(pos)) {
+        if (layout.size) {
+            chartArea[pos] -= layout.size;
+        }
+        const stack = stacks[layout.stack] || {
+            size: 0,
+            count: 1
+        };
+        stack.size = Math.max(stack.size, layout.horizontal ? box.height : box.width);
+        layout.size = stack.size / stack.count;
+        chartArea[pos] += layout.size;
+    }
+    if (box.getPadding) {
+        updateMaxPadding(maxPadding, box.getPadding());
+    }
+    const newWidth = Math.max(0, params.outerWidth - getCombinedMax(maxPadding, chartArea, 'left', 'right'));
+    const newHeight = Math.max(0, params.outerHeight - getCombinedMax(maxPadding, chartArea, 'top', 'bottom'));
+    const widthChanged = newWidth !== chartArea.w;
+    const heightChanged = newHeight !== chartArea.h;
+    chartArea.w = newWidth;
+    chartArea.h = newHeight;
+    return layout.horizontal ? {
+        same: widthChanged,
+        other: heightChanged
+    } : {
+        same: heightChanged,
+        other: widthChanged
+    };
+}
+function handleMaxPadding(chartArea) {
+    const maxPadding = chartArea.maxPadding;
+    function updatePos(pos) {
+        const change = Math.max(maxPadding[pos] - chartArea[pos], 0);
+        chartArea[pos] += change;
+        return change;
+    }
+    chartArea.y += updatePos('top');
+    chartArea.x += updatePos('left');
+    updatePos('right');
+    updatePos('bottom');
+}
+function getMargins(horizontal, chartArea) {
+    const maxPadding = chartArea.maxPadding;
+    function marginForPositions(positions) {
+        const margin = {
+            left: 0,
+            top: 0,
+            right: 0,
+            bottom: 0
+        };
+        positions.forEach((pos)=>{
+            margin[pos] = Math.max(chartArea[pos], maxPadding[pos]);
+        });
+        return margin;
+    }
+    return horizontal ? marginForPositions([
+        'left',
+        'right'
+    ]) : marginForPositions([
+        'top',
+        'bottom'
+    ]);
+}
+function fitBoxes(boxes, chartArea, params, stacks) {
+    const refitBoxes = [];
+    let i, ilen, layout, box, refit, changed;
+    for(i = 0, ilen = boxes.length, refit = 0; i < ilen; ++i){
+        layout = boxes[i];
+        box = layout.box;
+        box.update(layout.width || chartArea.w, layout.height || chartArea.h, getMargins(layout.horizontal, chartArea));
+        const { same , other  } = updateDims(chartArea, params, layout, stacks);
+        refit |= same && refitBoxes.length;
+        changed = changed || other;
+        if (!box.fullSize) {
+            refitBoxes.push(layout);
+        }
+    }
+    return refit && fitBoxes(refitBoxes, chartArea, params, stacks) || changed;
+}
+function setBoxDims(box, left, top, width, height) {
+    box.top = top;
+    box.left = left;
+    box.right = left + width;
+    box.bottom = top + height;
+    box.width = width;
+    box.height = height;
+}
+function placeBoxes(boxes, chartArea, params, stacks) {
+    const userPadding = params.padding;
+    let { x , y  } = chartArea;
+    for (const layout of boxes){
+        const box = layout.box;
+        const stack = stacks[layout.stack] || {
+            count: 1,
+            placed: 0,
+            weight: 1
+        };
+        const weight = layout.stackWeight / stack.weight || 1;
+        if (layout.horizontal) {
+            const width = chartArea.w * weight;
+            const height = stack.size || box.height;
+            if (defined(stack.start)) {
+                y = stack.start;
+            }
+            if (box.fullSize) {
+                setBoxDims(box, userPadding.left, y, params.outerWidth - userPadding.right - userPadding.left, height);
+            } else {
+                setBoxDims(box, chartArea.left + stack.placed, y, width, height);
+            }
+            stack.start = y;
+            stack.placed += width;
+            y = box.bottom;
+        } else {
+            const height = chartArea.h * weight;
+            const width = stack.size || box.width;
+            if (defined(stack.start)) {
+                x = stack.start;
+            }
+            if (box.fullSize) {
+                setBoxDims(box, x, userPadding.top, width, params.outerHeight - userPadding.bottom - userPadding.top);
+            } else {
+                setBoxDims(box, x, chartArea.top + stack.placed, width, height);
+            }
+            stack.start = x;
+            stack.placed += height;
+            x = box.right;
+        }
+    }
+    chartArea.x = x;
+    chartArea.y = y;
+}
+var layouts = {
+ addBox (chart, item) {
+        if (!chart.boxes) {
+            chart.boxes = [];
+        }
+        item.fullSize = item.fullSize || false;
+        item.position = item.position || 'top';
+        item.weight = item.weight || 0;
+        item._layers = item._layers || function() {
+            return [
+                {
+                    z: 0,
+                    draw (chartArea) {
+                        item.draw(chartArea);
+                    }
+                }
+            ];
+        };
+        chart.boxes.push(item);
+    },
+ removeBox (chart, layoutItem) {
+        const index = chart.boxes ? chart.boxes.indexOf(layoutItem) : -1;
+        if (index !== -1) {
+            chart.boxes.splice(index, 1);
+        }
+    },
+ configure (chart, item, options) {
+        item.fullSize = options.fullSize;
+        item.position = options.position;
+        item.weight = options.weight;
+    },
+ update (chart, width, height, minPadding) {
+        if (!chart) {
+            return;
+        }
+        const padding = toPadding(chart.options.layout.padding);
+        const availableWidth = Math.max(width - padding.width, 0);
+        const availableHeight = Math.max(height - padding.height, 0);
+        const boxes = buildLayoutBoxes(chart.boxes);
+        const verticalBoxes = boxes.vertical;
+        const horizontalBoxes = boxes.horizontal;
+        each(chart.boxes, (box)=>{
+            if (typeof box.beforeLayout === 'function') {
+                box.beforeLayout();
+            }
+        });
+        const visibleVerticalBoxCount = verticalBoxes.reduce((total, wrap)=>wrap.box.options && wrap.box.options.display === false ? total : total + 1, 0) || 1;
+        const params = Object.freeze({
+            outerWidth: width,
+            outerHeight: height,
+            padding,
+            availableWidth,
+            availableHeight,
+            vBoxMaxWidth: availableWidth / 2 / visibleVerticalBoxCount,
+            hBoxMaxHeight: availableHeight / 2
+        });
+        const maxPadding = Object.assign({}, padding);
+        updateMaxPadding(maxPadding, toPadding(minPadding));
+        const chartArea = Object.assign({
+            maxPadding,
+            w: availableWidth,
+            h: availableHeight,
+            x: padding.left,
+            y: padding.top
+        }, padding);
+        const stacks = setLayoutDims(verticalBoxes.concat(horizontalBoxes), params);
+        fitBoxes(boxes.fullSize, chartArea, params, stacks);
+        fitBoxes(verticalBoxes, chartArea, params, stacks);
+        if (fitBoxes(horizontalBoxes, chartArea, params, stacks)) {
+            fitBoxes(verticalBoxes, chartArea, params, stacks);
+        }
+        handleMaxPadding(chartArea);
+        placeBoxes(boxes.leftAndTop, chartArea, params, stacks);
+        chartArea.x += chartArea.w;
+        chartArea.y += chartArea.h;
+        placeBoxes(boxes.rightAndBottom, chartArea, params, stacks);
+        chart.chartArea = {
+            left: chartArea.left,
+            top: chartArea.top,
+            right: chartArea.left + chartArea.w,
+            bottom: chartArea.top + chartArea.h,
+            height: chartArea.h,
+            width: chartArea.w
+        };
+        each(boxes.chartArea, (layout)=>{
+            const box = layout.box;
+            Object.assign(box, chart.chartArea);
+            box.update(chartArea.w, chartArea.h, {
+                left: 0,
+                top: 0,
+                right: 0,
+                bottom: 0
+            });
+        });
+    }
+};
+
+class BasePlatform {
+ acquireContext(canvas, aspectRatio) {}
+ releaseContext(context) {
+        return false;
+    }
+ addEventListener(chart, type, listener) {}
+ removeEventListener(chart, type, listener) {}
+ getDevicePixelRatio() {
+        return 1;
+    }
+ getMaximumSize(element, width, height, aspectRatio) {
+        width = Math.max(0, width || element.width);
+        height = height || element.height;
+        return {
+            width,
+            height: Math.max(0, aspectRatio ? Math.floor(width / aspectRatio) : height)
+        };
+    }
+ isAttached(canvas) {
+        return true;
+    }
+ updateConfig(config) {
+    }
+}
+
+class BasicPlatform extends BasePlatform {
+    acquireContext(item) {
+        return item && item.getContext && item.getContext('2d') || null;
+    }
+    updateConfig(config) {
+        config.options.animation = false;
+    }
+}
+
+const EXPANDO_KEY = '$chartjs';
+ const EVENT_TYPES = {
+    touchstart: 'mousedown',
+    touchmove: 'mousemove',
+    touchend: 'mouseup',
+    pointerenter: 'mouseenter',
+    pointerdown: 'mousedown',
+    pointermove: 'mousemove',
+    pointerup: 'mouseup',
+    pointerleave: 'mouseout',
+    pointerout: 'mouseout'
+};
+const isNullOrEmpty = (value)=>value === null || value === '';
+ function initCanvas(canvas, aspectRatio) {
+    const style = canvas.style;
+    const renderHeight = canvas.getAttribute('height');
+    const renderWidth = canvas.getAttribute('width');
+    canvas[EXPANDO_KEY] = {
+        initial: {
+            height: renderHeight,
+            width: renderWidth,
+            style: {
+                display: style.display,
+                height: style.height,
+                width: style.width
+            }
+        }
+    };
+    style.display = style.display || 'block';
+    style.boxSizing = style.boxSizing || 'border-box';
+    if (isNullOrEmpty(renderWidth)) {
+        const displayWidth = readUsedSize(canvas, 'width');
+        if (displayWidth !== undefined) {
+            canvas.width = displayWidth;
+        }
+    }
+    if (isNullOrEmpty(renderHeight)) {
+        if (canvas.style.height === '') {
+            canvas.height = canvas.width / (aspectRatio || 2);
+        } else {
+            const displayHeight = readUsedSize(canvas, 'height');
+            if (displayHeight !== undefined) {
+                canvas.height = displayHeight;
+            }
+        }
+    }
+    return canvas;
+}
+const eventListenerOptions = supportsEventListenerOptions ? {
+    passive: true
+} : false;
+function addListener(node, type, listener) {
+    if (node) {
+        node.addEventListener(type, listener, eventListenerOptions);
+    }
+}
+function removeListener(chart, type, listener) {
+    if (chart && chart.canvas) {
+        chart.canvas.removeEventListener(type, listener, eventListenerOptions);
+    }
+}
+function fromNativeEvent(event, chart) {
+    const type = EVENT_TYPES[event.type] || event.type;
+    const { x , y  } = getRelativePosition(event, chart);
+    return {
+        type,
+        chart,
+        native: event,
+        x: x !== undefined ? x : null,
+        y: y !== undefined ? y : null
+    };
+}
+function nodeListContains(nodeList, canvas) {
+    for (const node of nodeList){
+        if (node === canvas || node.contains(canvas)) {
+            return true;
+        }
+    }
+}
+function createAttachObserver(chart, type, listener) {
+    const canvas = chart.canvas;
+    const observer = new MutationObserver((entries)=>{
+        let trigger = false;
+        for (const entry of entries){
+            trigger = trigger || nodeListContains(entry.addedNodes, canvas);
+            trigger = trigger && !nodeListContains(entry.removedNodes, canvas);
+        }
+        if (trigger) {
+            listener();
+        }
+    });
+    observer.observe(document, {
+        childList: true,
+        subtree: true
+    });
+    return observer;
+}
+function createDetachObserver(chart, type, listener) {
+    const canvas = chart.canvas;
+    const observer = new MutationObserver((entries)=>{
+        let trigger = false;
+        for (const entry of entries){
+            trigger = trigger || nodeListContains(entry.removedNodes, canvas);
+            trigger = trigger && !nodeListContains(entry.addedNodes, canvas);
+        }
+        if (trigger) {
+            listener();
+        }
+    });
+    observer.observe(document, {
+        childList: true,
+        subtree: true
+    });
+    return observer;
+}
+const drpListeningCharts = new Map();
+let oldDevicePixelRatio = 0;
+function onWindowResize() {
+    const dpr = window.devicePixelRatio;
+    if (dpr === oldDevicePixelRatio) {
+        return;
+    }
+    oldDevicePixelRatio = dpr;
+    drpListeningCharts.forEach((resize, chart)=>{
+        if (chart.currentDevicePixelRatio !== dpr) {
+            resize();
+        }
+    });
+}
+function listenDevicePixelRatioChanges(chart, resize) {
+    if (!drpListeningCharts.size) {
+        window.addEventListener('resize', onWindowResize);
+    }
+    drpListeningCharts.set(chart, resize);
+}
+function unlistenDevicePixelRatioChanges(chart) {
+    drpListeningCharts.delete(chart);
+    if (!drpListeningCharts.size) {
+        window.removeEventListener('resize', onWindowResize);
+    }
+}
+function createResizeObserver(chart, type, listener) {
+    const canvas = chart.canvas;
+    const container = canvas && _getParentNode(canvas);
+    if (!container) {
+        return;
+    }
+    const resize = throttled((width, height)=>{
+        const w = container.clientWidth;
+        listener(width, height);
+        if (w < container.clientWidth) {
+            listener();
+        }
+    }, window);
+    const observer = new ResizeObserver((entries)=>{
+        const entry = entries[0];
+        const width = entry.contentRect.width;
+        const height = entry.contentRect.height;
+        if (width === 0 && height === 0) {
+            return;
+        }
+        resize(width, height);
+    });
+    observer.observe(container);
+    listenDevicePixelRatioChanges(chart, resize);
+    return observer;
+}
+function releaseObserver(chart, type, observer) {
+    if (observer) {
+        observer.disconnect();
+    }
+    if (type === 'resize') {
+        unlistenDevicePixelRatioChanges(chart);
+    }
+}
+function createProxyAndListen(chart, type, listener) {
+    const canvas = chart.canvas;
+    const proxy = throttled((event)=>{
+        if (chart.ctx !== null) {
+            listener(fromNativeEvent(event, chart));
+        }
+    }, chart);
+    addListener(canvas, type, proxy);
+    return proxy;
+}
+ class DomPlatform extends BasePlatform {
+ acquireContext(canvas, aspectRatio) {
+        const context = canvas && canvas.getContext && canvas.getContext('2d');
+        if (context && context.canvas === canvas) {
+            initCanvas(canvas, aspectRatio);
+            return context;
+        }
+        return null;
+    }
+ releaseContext(context) {
+        const canvas = context.canvas;
+        if (!canvas[EXPANDO_KEY]) {
+            return false;
+        }
+        const initial = canvas[EXPANDO_KEY].initial;
+        [
+            'height',
+            'width'
+        ].forEach((prop)=>{
+            const value = initial[prop];
+            if (isNullOrUndef(value)) {
+                canvas.removeAttribute(prop);
+            } else {
+                canvas.setAttribute(prop, value);
+            }
+        });
+        const style = initial.style || {};
+        Object.keys(style).forEach((key)=>{
+            canvas.style[key] = style[key];
+        });
+        canvas.width = canvas.width;
+        delete canvas[EXPANDO_KEY];
+        return true;
+    }
+ addEventListener(chart, type, listener) {
+        this.removeEventListener(chart, type);
+        const proxies = chart.$proxies || (chart.$proxies = {});
+        const handlers = {
+            attach: createAttachObserver,
+            detach: createDetachObserver,
+            resize: createResizeObserver
+        };
+        const handler = handlers[type] || createProxyAndListen;
+        proxies[type] = handler(chart, type, listener);
+    }
+ removeEventListener(chart, type) {
+        const proxies = chart.$proxies || (chart.$proxies = {});
+        const proxy = proxies[type];
+        if (!proxy) {
+            return;
+        }
+        const handlers = {
+            attach: releaseObserver,
+            detach: releaseObserver,
+            resize: releaseObserver
+        };
+        const handler = handlers[type] || removeListener;
+        handler(chart, type, proxy);
+        proxies[type] = undefined;
+    }
+    getDevicePixelRatio() {
+        return window.devicePixelRatio;
+    }
+ getMaximumSize(canvas, width, height, aspectRatio) {
+        return getMaximumSize(canvas, width, height, aspectRatio);
+    }
+ isAttached(canvas) {
+        const container = canvas && _getParentNode(canvas);
+        return !!(container && container.isConnected);
+    }
+}
+
+function _detectPlatform(canvas) {
+    if (!_isDomSupported() || typeof OffscreenCanvas !== 'undefined' && canvas instanceof OffscreenCanvas) {
+        return BasicPlatform;
+    }
+    return DomPlatform;
+}
+
+class Element {
+    static defaults = {};
+    static defaultRoutes = undefined;
+    x;
+    y;
+    active = false;
+    options;
+    $animations;
+    tooltipPosition(useFinalPosition) {
+        const { x , y  } = this.getProps([
+            'x',
+            'y'
+        ], useFinalPosition);
+        return {
+            x,
+            y
+        };
+    }
+    hasValue() {
+        return isNumber(this.x) && isNumber(this.y);
+    }
+    getProps(props, final) {
+        const anims = this.$animations;
+        if (!final || !anims) {
+            // let's not create an object, if not needed
+            return this;
+        }
+        const ret = {};
+        props.forEach((prop)=>{
+            ret[prop] = anims[prop] && anims[prop].active() ? anims[prop]._to : this[prop];
+        });
+        return ret;
+    }
+}
+
+function autoSkip(scale, ticks) {
+    const tickOpts = scale.options.ticks;
+    const determinedMaxTicks = determineMaxTicks(scale);
+    const ticksLimit = Math.min(tickOpts.maxTicksLimit || determinedMaxTicks, determinedMaxTicks);
+    const majorIndices = tickOpts.major.enabled ? getMajorIndices(ticks) : [];
+    const numMajorIndices = majorIndices.length;
+    const first = majorIndices[0];
+    const last = majorIndices[numMajorIndices - 1];
+    const newTicks = [];
+    if (numMajorIndices > ticksLimit) {
+        skipMajors(ticks, newTicks, majorIndices, numMajorIndices / ticksLimit);
+        return newTicks;
+    }
+    const spacing = calculateSpacing(majorIndices, ticks, ticksLimit);
+    if (numMajorIndices > 0) {
+        let i, ilen;
+        const avgMajorSpacing = numMajorIndices > 1 ? Math.round((last - first) / (numMajorIndices - 1)) : null;
+        skip(ticks, newTicks, spacing, isNullOrUndef(avgMajorSpacing) ? 0 : first - avgMajorSpacing, first);
+        for(i = 0, ilen = numMajorIndices - 1; i < ilen; i++){
+            skip(ticks, newTicks, spacing, majorIndices[i], majorIndices[i + 1]);
+        }
+        skip(ticks, newTicks, spacing, last, isNullOrUndef(avgMajorSpacing) ? ticks.length : last + avgMajorSpacing);
+        return newTicks;
+    }
+    skip(ticks, newTicks, spacing);
+    return newTicks;
+}
+function determineMaxTicks(scale) {
+    const offset = scale.options.offset;
+    const tickLength = scale._tickSize();
+    const maxScale = scale._length / tickLength + (offset ? 0 : 1);
+    const maxChart = scale._maxLength / tickLength;
+    return Math.floor(Math.min(maxScale, maxChart));
+}
+ function calculateSpacing(majorIndices, ticks, ticksLimit) {
+    const evenMajorSpacing = getEvenSpacing(majorIndices);
+    const spacing = ticks.length / ticksLimit;
+    if (!evenMajorSpacing) {
+        return Math.max(spacing, 1);
+    }
+    const factors = _factorize(evenMajorSpacing);
+    for(let i = 0, ilen = factors.length - 1; i < ilen; i++){
+        const factor = factors[i];
+        if (factor > spacing) {
+            return factor;
+        }
+    }
+    return Math.max(spacing, 1);
+}
+ function getMajorIndices(ticks) {
+    const result = [];
+    let i, ilen;
+    for(i = 0, ilen = ticks.length; i < ilen; i++){
+        if (ticks[i].major) {
+            result.push(i);
+        }
+    }
+    return result;
+}
+ function skipMajors(ticks, newTicks, majorIndices, spacing) {
+    let count = 0;
+    let next = majorIndices[0];
+    let i;
+    spacing = Math.ceil(spacing);
+    for(i = 0; i < ticks.length; i++){
+        if (i === next) {
+            newTicks.push(ticks[i]);
+            count++;
+            next = majorIndices[count * spacing];
+        }
+    }
+}
+ function skip(ticks, newTicks, spacing, majorStart, majorEnd) {
+    const start = valueOrDefault(majorStart, 0);
+    const end = Math.min(valueOrDefault(majorEnd, ticks.length), ticks.length);
+    let count = 0;
+    let length, i, next;
+    spacing = Math.ceil(spacing);
+    if (majorEnd) {
+        length = majorEnd - majorStart;
+        spacing = length / Math.floor(length / spacing);
+    }
+    next = start;
+    while(next < 0){
+        count++;
+        next = Math.round(start + count * spacing);
+    }
+    for(i = Math.max(start, 0); i < end; i++){
+        if (i === next) {
+            newTicks.push(ticks[i]);
+            count++;
+            next = Math.round(start + count * spacing);
+        }
+    }
+}
+ function getEvenSpacing(arr) {
+    const len = arr.length;
+    let i, diff;
+    if (len < 2) {
+        return false;
+    }
+    for(diff = arr[0], i = 1; i < len; ++i){
+        if (arr[i] - arr[i - 1] !== diff) {
+            return false;
+        }
+    }
+    return diff;
+}
+
+const reverseAlign = (align)=>align === 'left' ? 'right' : align === 'right' ? 'left' : align;
+const offsetFromEdge = (scale, edge, offset)=>edge === 'top' || edge === 'left' ? scale[edge] + offset : scale[edge] - offset;
+const getTicksLimit = (ticksLength, maxTicksLimit)=>Math.min(maxTicksLimit || ticksLength, ticksLength);
+ function sample(arr, numItems) {
+    const result = [];
+    const increment = arr.length / numItems;
+    const len = arr.length;
+    let i = 0;
+    for(; i < len; i += increment){
+        result.push(arr[Math.floor(i)]);
+    }
+    return result;
+}
+ function getPixelForGridLine(scale, index, offsetGridLines) {
+    const length = scale.ticks.length;
+    const validIndex = Math.min(index, length - 1);
+    const start = scale._startPixel;
+    const end = scale._endPixel;
+    const epsilon = 1e-6;
+    let lineValue = scale.getPixelForTick(validIndex);
+    let offset;
+    if (offsetGridLines) {
+        if (length === 1) {
+            offset = Math.max(lineValue - start, end - lineValue);
+        } else if (index === 0) {
+            offset = (scale.getPixelForTick(1) - lineValue) / 2;
+        } else {
+            offset = (lineValue - scale.getPixelForTick(validIndex - 1)) / 2;
+        }
+        lineValue += validIndex < index ? offset : -offset;
+        if (lineValue < start - epsilon || lineValue > end + epsilon) {
+            return;
+        }
+    }
+    return lineValue;
+}
+ function garbageCollect(caches, length) {
+    each(caches, (cache)=>{
+        const gc = cache.gc;
+        const gcLen = gc.length / 2;
+        let i;
+        if (gcLen > length) {
+            for(i = 0; i < gcLen; ++i){
+                delete cache.data[gc[i]];
+            }
+            gc.splice(0, gcLen);
+        }
+    });
+}
+ function getTickMarkLength(options) {
+    return options.drawTicks ? options.tickLength : 0;
+}
+ function getTitleHeight(options, fallback) {
+    if (!options.display) {
+        return 0;
+    }
+    const font = toFont(options.font, fallback);
+    const padding = toPadding(options.padding);
+    const lines = isArray(options.text) ? options.text.length : 1;
+    return lines * font.lineHeight + padding.height;
+}
+function createScaleContext(parent, scale) {
+    return createContext(parent, {
+        scale,
+        type: 'scale'
+    });
+}
+function createTickContext(parent, index, tick) {
+    return createContext(parent, {
+        tick,
+        index,
+        type: 'tick'
+    });
+}
+function titleAlign(align, position, reverse) {
+     let ret = _toLeftRightCenter(align);
+    if (reverse && position !== 'right' || !reverse && position === 'right') {
+        ret = reverseAlign(ret);
+    }
+    return ret;
+}
+function titleArgs(scale, offset, position, align) {
+    const { top , left , bottom , right , chart  } = scale;
+    const { chartArea , scales  } = chart;
+    let rotation = 0;
+    let maxWidth, titleX, titleY;
+    const height = bottom - top;
+    const width = right - left;
+    if (scale.isHorizontal()) {
+        titleX = _alignStartEnd(align, left, right);
+        if (isObject(position)) {
+            const positionAxisID = Object.keys(position)[0];
+            const value = position[positionAxisID];
+            titleY = scales[positionAxisID].getPixelForValue(value) + height - offset;
+        } else if (position === 'center') {
+            titleY = (chartArea.bottom + chartArea.top) / 2 + height - offset;
+        } else {
+            titleY = offsetFromEdge(scale, position, offset);
+        }
+        maxWidth = right - left;
+    } else {
+        if (isObject(position)) {
+            const positionAxisID = Object.keys(position)[0];
+            const value = position[positionAxisID];
+            titleX = scales[positionAxisID].getPixelForValue(value) - width + offset;
+        } else if (position === 'center') {
+            titleX = (chartArea.left + chartArea.right) / 2 - width + offset;
+        } else {
+            titleX = offsetFromEdge(scale, position, offset);
+        }
+        titleY = _alignStartEnd(align, bottom, top);
+        rotation = position === 'left' ? -HALF_PI : HALF_PI;
+    }
+    return {
+        titleX,
+        titleY,
+        maxWidth,
+        rotation
+    };
+}
+class Scale extends Element {
+    constructor(cfg){
+        super();
+         this.id = cfg.id;
+         this.type = cfg.type;
+         this.options = undefined;
+         this.ctx = cfg.ctx;
+         this.chart = cfg.chart;
+         this.top = undefined;
+         this.bottom = undefined;
+         this.left = undefined;
+         this.right = undefined;
+         this.width = undefined;
+         this.height = undefined;
+        this._margins = {
+            left: 0,
+            right: 0,
+            top: 0,
+            bottom: 0
+        };
+         this.maxWidth = undefined;
+         this.maxHeight = undefined;
+         this.paddingTop = undefined;
+         this.paddingBottom = undefined;
+         this.paddingLeft = undefined;
+         this.paddingRight = undefined;
+         this.axis = undefined;
+         this.labelRotation = undefined;
+        this.min = undefined;
+        this.max = undefined;
+        this._range = undefined;
+         this.ticks = [];
+         this._gridLineItems = null;
+         this._labelItems = null;
+         this._labelSizes = null;
+        this._length = 0;
+        this._maxLength = 0;
+        this._longestTextCache = {};
+         this._startPixel = undefined;
+         this._endPixel = undefined;
+        this._reversePixels = false;
+        this._userMax = undefined;
+        this._userMin = undefined;
+        this._suggestedMax = undefined;
+        this._suggestedMin = undefined;
+        this._ticksLength = 0;
+        this._borderValue = 0;
+        this._cache = {};
+        this._dataLimitsCached = false;
+        this.$context = undefined;
+    }
+ init(options) {
+        this.options = options.setContext(this.getContext());
+        this.axis = options.axis;
+        this._userMin = this.parse(options.min);
+        this._userMax = this.parse(options.max);
+        this._suggestedMin = this.parse(options.suggestedMin);
+        this._suggestedMax = this.parse(options.suggestedMax);
+    }
+ parse(raw, index) {
+        return raw;
+    }
+ getUserBounds() {
+        let { _userMin , _userMax , _suggestedMin , _suggestedMax  } = this;
+        _userMin = finiteOrDefault(_userMin, Number.POSITIVE_INFINITY);
+        _userMax = finiteOrDefault(_userMax, Number.NEGATIVE_INFINITY);
+        _suggestedMin = finiteOrDefault(_suggestedMin, Number.POSITIVE_INFINITY);
+        _suggestedMax = finiteOrDefault(_suggestedMax, Number.NEGATIVE_INFINITY);
+        return {
+            min: finiteOrDefault(_userMin, _suggestedMin),
+            max: finiteOrDefault(_userMax, _suggestedMax),
+            minDefined: isNumberFinite(_userMin),
+            maxDefined: isNumberFinite(_userMax)
+        };
+    }
+ getMinMax(canStack) {
+        let { min , max , minDefined , maxDefined  } = this.getUserBounds();
+        let range;
+        if (minDefined && maxDefined) {
+            return {
+                min,
+                max
+            };
+        }
+        const metas = this.getMatchingVisibleMetas();
+        for(let i = 0, ilen = metas.length; i < ilen; ++i){
+            range = metas[i].controller.getMinMax(this, canStack);
+            if (!minDefined) {
+                min = Math.min(min, range.min);
+            }
+            if (!maxDefined) {
+                max = Math.max(max, range.max);
+            }
+        }
+        min = maxDefined && min > max ? max : min;
+        max = minDefined && min > max ? min : max;
+        return {
+            min: finiteOrDefault(min, finiteOrDefault(max, min)),
+            max: finiteOrDefault(max, finiteOrDefault(min, max))
+        };
+    }
+ getPadding() {
+        return {
+            left: this.paddingLeft || 0,
+            top: this.paddingTop || 0,
+            right: this.paddingRight || 0,
+            bottom: this.paddingBottom || 0
+        };
+    }
+ getTicks() {
+        return this.ticks;
+    }
+ getLabels() {
+        const data = this.chart.data;
+        return this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels || [];
+    }
+ getLabelItems(chartArea = this.chart.chartArea) {
+        const items = this._labelItems || (this._labelItems = this._computeLabelItems(chartArea));
+        return items;
+    }
+    beforeLayout() {
+        this._cache = {};
+        this._dataLimitsCached = false;
+    }
+    beforeUpdate() {
+        callback(this.options.beforeUpdate, [
+            this
+        ]);
+    }
+ update(maxWidth, maxHeight, margins) {
+        const { beginAtZero , grace , ticks: tickOpts  } = this.options;
+        const sampleSize = tickOpts.sampleSize;
+        this.beforeUpdate();
+        this.maxWidth = maxWidth;
+        this.maxHeight = maxHeight;
+        this._margins = margins = Object.assign({
+            left: 0,
+            right: 0,
+            top: 0,
+            bottom: 0
+        }, margins);
+        this.ticks = null;
+        this._labelSizes = null;
+        this._gridLineItems = null;
+        this._labelItems = null;
+        this.beforeSetDimensions();
+        this.setDimensions();
+        this.afterSetDimensions();
+        this._maxLength = this.isHorizontal() ? this.width + margins.left + margins.right : this.height + margins.top + margins.bottom;
+        if (!this._dataLimitsCached) {
+            this.beforeDataLimits();
+            this.determineDataLimits();
+            this.afterDataLimits();
+            this._range = _addGrace(this, grace, beginAtZero);
+            this._dataLimitsCached = true;
+        }
+        this.beforeBuildTicks();
+        this.ticks = this.buildTicks() || [];
+        this.afterBuildTicks();
+        const samplingEnabled = sampleSize < this.ticks.length;
+        this._convertTicksToLabels(samplingEnabled ? sample(this.ticks, sampleSize) : this.ticks);
+        this.configure();
+        this.beforeCalculateLabelRotation();
+        this.calculateLabelRotation();
+        this.afterCalculateLabelRotation();
+        if (tickOpts.display && (tickOpts.autoSkip || tickOpts.source === 'auto')) {
+            this.ticks = autoSkip(this, this.ticks);
+            this._labelSizes = null;
+            this.afterAutoSkip();
+        }
+        if (samplingEnabled) {
+            this._convertTicksToLabels(this.ticks);
+        }
+        this.beforeFit();
+        this.fit();
+        this.afterFit();
+        this.afterUpdate();
+    }
+ configure() {
+        let reversePixels = this.options.reverse;
+        let startPixel, endPixel;
+        if (this.isHorizontal()) {
+            startPixel = this.left;
+            endPixel = this.right;
+        } else {
+            startPixel = this.top;
+            endPixel = this.bottom;
+            reversePixels = !reversePixels;
+        }
+        this._startPixel = startPixel;
+        this._endPixel = endPixel;
+        this._reversePixels = reversePixels;
+        this._length = endPixel - startPixel;
+        this._alignToPixels = this.options.alignToPixels;
+    }
+    afterUpdate() {
+        callback(this.options.afterUpdate, [
+            this
+        ]);
+    }
+    beforeSetDimensions() {
+        callback(this.options.beforeSetDimensions, [
+            this
+        ]);
+    }
+    setDimensions() {
+        if (this.isHorizontal()) {
+            this.width = this.maxWidth;
+            this.left = 0;
+            this.right = this.width;
+        } else {
+            this.height = this.maxHeight;
+            this.top = 0;
+            this.bottom = this.height;
+        }
+        this.paddingLeft = 0;
+        this.paddingTop = 0;
+        this.paddingRight = 0;
+        this.paddingBottom = 0;
+    }
+    afterSetDimensions() {
+        callback(this.options.afterSetDimensions, [
+            this
+        ]);
+    }
+    _callHooks(name) {
+        this.chart.notifyPlugins(name, this.getContext());
+        callback(this.options[name], [
+            this
+        ]);
+    }
+    beforeDataLimits() {
+        this._callHooks('beforeDataLimits');
+    }
+    determineDataLimits() {}
+    afterDataLimits() {
+        this._callHooks('afterDataLimits');
+    }
+    beforeBuildTicks() {
+        this._callHooks('beforeBuildTicks');
+    }
+ buildTicks() {
+        return [];
+    }
+    afterBuildTicks() {
+        this._callHooks('afterBuildTicks');
+    }
+    beforeTickToLabelConversion() {
+        callback(this.options.beforeTickToLabelConversion, [
+            this
+        ]);
+    }
+ generateTickLabels(ticks) {
+        const tickOpts = this.options.ticks;
+        let i, ilen, tick;
+        for(i = 0, ilen = ticks.length; i < ilen; i++){
+            tick = ticks[i];
+            tick.label = callback(tickOpts.callback, [
+                tick.value,
+                i,
+                ticks
+            ], this);
+        }
+    }
+    afterTickToLabelConversion() {
+        callback(this.options.afterTickToLabelConversion, [
+            this
+        ]);
+    }
+    beforeCalculateLabelRotation() {
+        callback(this.options.beforeCalculateLabelRotation, [
+            this
+        ]);
+    }
+    calculateLabelRotation() {
+        const options = this.options;
+        const tickOpts = options.ticks;
+        const numTicks = getTicksLimit(this.ticks.length, options.ticks.maxTicksLimit);
+        const minRotation = tickOpts.minRotation || 0;
+        const maxRotation = tickOpts.maxRotation;
+        let labelRotation = minRotation;
+        let tickWidth, maxHeight, maxLabelDiagonal;
+        if (!this._isVisible() || !tickOpts.display || minRotation >= maxRotation || numTicks <= 1 || !this.isHorizontal()) {
+            this.labelRotation = minRotation;
+            return;
+        }
+        const labelSizes = this._getLabelSizes();
+        const maxLabelWidth = labelSizes.widest.width;
+        const maxLabelHeight = labelSizes.highest.height;
+        const maxWidth = _limitValue(this.chart.width - maxLabelWidth, 0, this.maxWidth);
+        tickWidth = options.offset ? this.maxWidth / numTicks : maxWidth / (numTicks - 1);
+        if (maxLabelWidth + 6 > tickWidth) {
+            tickWidth = maxWidth / (numTicks - (options.offset ? 0.5 : 1));
+            maxHeight = this.maxHeight - getTickMarkLength(options.grid) - tickOpts.padding - getTitleHeight(options.title, this.chart.options.font);
+            maxLabelDiagonal = Math.sqrt(maxLabelWidth * maxLabelWidth + maxLabelHeight * maxLabelHeight);
+            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))));
+            labelRotation = Math.max(minRotation, Math.min(maxRotation, labelRotation));
+        }
+        this.labelRotation = labelRotation;
+    }
+    afterCalculateLabelRotation() {
+        callback(this.options.afterCalculateLabelRotation, [
+            this
+        ]);
+    }
+    afterAutoSkip() {}
+    beforeFit() {
+        callback(this.options.beforeFit, [
+            this
+        ]);
+    }
+    fit() {
+        const minSize = {
+            width: 0,
+            height: 0
+        };
+        const { chart , options: { ticks: tickOpts , title: titleOpts , grid: gridOpts  }  } = this;
+        const display = this._isVisible();
+        const isHorizontal = this.isHorizontal();
+        if (display) {
+            const titleHeight = getTitleHeight(titleOpts, chart.options.font);
+            if (isHorizontal) {
+                minSize.width = this.maxWidth;
+                minSize.height = getTickMarkLength(gridOpts) + titleHeight;
+            } else {
+                minSize.height = this.maxHeight;
+                minSize.width = getTickMarkLength(gridOpts) + titleHeight;
+            }
+            if (tickOpts.display && this.ticks.length) {
+                const { first , last , widest , highest  } = this._getLabelSizes();
+                const tickPadding = tickOpts.padding * 2;
+                const angleRadians = toRadians(this.labelRotation);
+                const cos = Math.cos(angleRadians);
+                const sin = Math.sin(angleRadians);
+                if (isHorizontal) {
+                    const labelHeight = tickOpts.mirror ? 0 : sin * widest.width + cos * highest.height;
+                    minSize.height = Math.min(this.maxHeight, minSize.height + labelHeight + tickPadding);
+                } else {
+                    const labelWidth = tickOpts.mirror ? 0 : cos * widest.width + sin * highest.height;
+                    minSize.width = Math.min(this.maxWidth, minSize.width + labelWidth + tickPadding);
+                }
+                this._calculatePadding(first, last, sin, cos);
+            }
+        }
+        this._handleMargins();
+        if (isHorizontal) {
+            this.width = this._length = chart.width - this._margins.left - this._margins.right;
+            this.height = minSize.height;
+        } else {
+            this.width = minSize.width;
+            this.height = this._length = chart.height - this._margins.top - this._margins.bottom;
+        }
+    }
+    _calculatePadding(first, last, sin, cos) {
+        const { ticks: { align , padding  } , position  } = this.options;
+        const isRotated = this.labelRotation !== 0;
+        const labelsBelowTicks = position !== 'top' && this.axis === 'x';
+        if (this.isHorizontal()) {
+            const offsetLeft = this.getPixelForTick(0) - this.left;
+            const offsetRight = this.right - this.getPixelForTick(this.ticks.length - 1);
+            let paddingLeft = 0;
+            let paddingRight = 0;
+            if (isRotated) {
+                if (labelsBelowTicks) {
+                    paddingLeft = cos * first.width;
+                    paddingRight = sin * last.height;
+                } else {
+                    paddingLeft = sin * first.height;
+                    paddingRight = cos * last.width;
+                }
+            } else if (align === 'start') {
+                paddingRight = last.width;
+            } else if (align === 'end') {
+                paddingLeft = first.width;
+            } else if (align !== 'inner') {
+                paddingLeft = first.width / 2;
+                paddingRight = last.width / 2;
+            }
+            this.paddingLeft = Math.max((paddingLeft - offsetLeft + padding) * this.width / (this.width - offsetLeft), 0);
+            this.paddingRight = Math.max((paddingRight - offsetRight + padding) * this.width / (this.width - offsetRight), 0);
+        } else {
+            let paddingTop = last.height / 2;
+            let paddingBottom = first.height / 2;
+            if (align === 'start') {
+                paddingTop = 0;
+                paddingBottom = first.height;
+            } else if (align === 'end') {
+                paddingTop = last.height;
+                paddingBottom = 0;
+            }
+            this.paddingTop = paddingTop + padding;
+            this.paddingBottom = paddingBottom + padding;
+        }
+    }
+ _handleMargins() {
+        if (this._margins) {
+            this._margins.left = Math.max(this.paddingLeft, this._margins.left);
+            this._margins.top = Math.max(this.paddingTop, this._margins.top);
+            this._margins.right = Math.max(this.paddingRight, this._margins.right);
+            this._margins.bottom = Math.max(this.paddingBottom, this._margins.bottom);
+        }
+    }
+    afterFit() {
+        callback(this.options.afterFit, [
+            this
+        ]);
+    }
+ isHorizontal() {
+        const { axis , position  } = this.options;
+        return position === 'top' || position === 'bottom' || axis === 'x';
+    }
+ isFullSize() {
+        return this.options.fullSize;
+    }
+ _convertTicksToLabels(ticks) {
+        this.beforeTickToLabelConversion();
+        this.generateTickLabels(ticks);
+        let i, ilen;
+        for(i = 0, ilen = ticks.length; i < ilen; i++){
+            if (isNullOrUndef(ticks[i].label)) {
+                ticks.splice(i, 1);
+                ilen--;
+                i--;
+            }
+        }
+        this.afterTickToLabelConversion();
+    }
+ _getLabelSizes() {
+        let labelSizes = this._labelSizes;
+        if (!labelSizes) {
+            const sampleSize = this.options.ticks.sampleSize;
+            let ticks = this.ticks;
+            if (sampleSize < ticks.length) {
+                ticks = sample(ticks, sampleSize);
+            }
+            this._labelSizes = labelSizes = this._computeLabelSizes(ticks, ticks.length, this.options.ticks.maxTicksLimit);
+        }
+        return labelSizes;
+    }
+ _computeLabelSizes(ticks, length, maxTicksLimit) {
+        const { ctx , _longestTextCache: caches  } = this;
+        const widths = [];
+        const heights = [];
+        const increment = Math.floor(length / getTicksLimit(length, maxTicksLimit));
+        let widestLabelSize = 0;
+        let highestLabelSize = 0;
+        let i, j, jlen, label, tickFont, fontString, cache, lineHeight, width, height, nestedLabel;
+        for(i = 0; i < length; i += increment){
+            label = ticks[i].label;
+            tickFont = this._resolveTickFontOptions(i);
+            ctx.font = fontString = tickFont.string;
+            cache = caches[fontString] = caches[fontString] || {
+                data: {},
+                gc: []
+            };
+            lineHeight = tickFont.lineHeight;
+            width = height = 0;
+            if (!isNullOrUndef(label) && !isArray(label)) {
+                width = _measureText(ctx, cache.data, cache.gc, width, label);
+                height = lineHeight;
+            } else if (isArray(label)) {
+                for(j = 0, jlen = label.length; j < jlen; ++j){
+                    nestedLabel =  label[j];
+                    if (!isNullOrUndef(nestedLabel) && !isArray(nestedLabel)) {
+                        width = _measureText(ctx, cache.data, cache.gc, width, nestedLabel);
+                        height += lineHeight;
+                    }
+                }
+            }
+            widths.push(width);
+            heights.push(height);
+            widestLabelSize = Math.max(width, widestLabelSize);
+            highestLabelSize = Math.max(height, highestLabelSize);
+        }
+        garbageCollect(caches, length);
+        const widest = widths.indexOf(widestLabelSize);
+        const highest = heights.indexOf(highestLabelSize);
+        const valueAt = (idx)=>({
+                width: widths[idx] || 0,
+                height: heights[idx] || 0
+            });
+        return {
+            first: valueAt(0),
+            last: valueAt(length - 1),
+            widest: valueAt(widest),
+            highest: valueAt(highest),
+            widths,
+            heights
+        };
+    }
+ getLabelForValue(value) {
+        return value;
+    }
+ getPixelForValue(value, index) {
+        return NaN;
+    }
+ getValueForPixel(pixel) {}
+ getPixelForTick(index) {
+        const ticks = this.ticks;
+        if (index < 0 || index > ticks.length - 1) {
+            return null;
+        }
+        return this.getPixelForValue(ticks[index].value);
+    }
+ getPixelForDecimal(decimal) {
+        if (this._reversePixels) {
+            decimal = 1 - decimal;
+        }
+        const pixel = this._startPixel + decimal * this._length;
+        return _int16Range(this._alignToPixels ? _alignPixel(this.chart, pixel, 0) : pixel);
+    }
+ getDecimalForPixel(pixel) {
+        const decimal = (pixel - this._startPixel) / this._length;
+        return this._reversePixels ? 1 - decimal : decimal;
+    }
+ getBasePixel() {
+        return this.getPixelForValue(this.getBaseValue());
+    }
+ getBaseValue() {
+        const { min , max  } = this;
+        return min < 0 && max < 0 ? max : min > 0 && max > 0 ? min : 0;
+    }
+ getContext(index) {
+        const ticks = this.ticks || [];
+        if (index >= 0 && index < ticks.length) {
+            const tick = ticks[index];
+            return tick.$context || (tick.$context = createTickContext(this.getContext(), index, tick));
+        }
+        return this.$context || (this.$context = createScaleContext(this.chart.getContext(), this));
+    }
+ _tickSize() {
+        const optionTicks = this.options.ticks;
+        const rot = toRadians(this.labelRotation);
+        const cos = Math.abs(Math.cos(rot));
+        const sin = Math.abs(Math.sin(rot));
+        const labelSizes = this._getLabelSizes();
+        const padding = optionTicks.autoSkipPadding || 0;
+        const w = labelSizes ? labelSizes.widest.width + padding : 0;
+        const h = labelSizes ? labelSizes.highest.height + padding : 0;
+        return this.isHorizontal() ? h * cos > w * sin ? w / cos : h / sin : h * sin < w * cos ? h / cos : w / sin;
+    }
+ _isVisible() {
+        const display = this.options.display;
+        if (display !== 'auto') {
+            return !!display;
+        }
+        return this.getMatchingVisibleMetas().length > 0;
+    }
+ _computeGridLineItems(chartArea) {
+        const axis = this.axis;
+        const chart = this.chart;
+        const options = this.options;
+        const { grid , position , border  } = options;
+        const offset = grid.offset;
+        const isHorizontal = this.isHorizontal();
+        const ticks = this.ticks;
+        const ticksLength = ticks.length + (offset ? 1 : 0);
+        const tl = getTickMarkLength(grid);
+        const items = [];
+        const borderOpts = border.setContext(this.getContext());
+        const axisWidth = borderOpts.display ? borderOpts.width : 0;
+        const axisHalfWidth = axisWidth / 2;
+        const alignBorderValue = function(pixel) {
+            return _alignPixel(chart, pixel, axisWidth);
+        };
+        let borderValue, i, lineValue, alignedLineValue;
+        let tx1, ty1, tx2, ty2, x1, y1, x2, y2;
+        if (position === 'top') {
+            borderValue = alignBorderValue(this.bottom);
+            ty1 = this.bottom - tl;
+            ty2 = borderValue - axisHalfWidth;
+            y1 = alignBorderValue(chartArea.top) + axisHalfWidth;
+            y2 = chartArea.bottom;
+        } else if (position === 'bottom') {
+            borderValue = alignBorderValue(this.top);
+            y1 = chartArea.top;
+            y2 = alignBorderValue(chartArea.bottom) - axisHalfWidth;
+            ty1 = borderValue + axisHalfWidth;
+            ty2 = this.top + tl;
+        } else if (position === 'left') {
+            borderValue = alignBorderValue(this.right);
+            tx1 = this.right - tl;
+            tx2 = borderValue - axisHalfWidth;
+            x1 = alignBorderValue(chartArea.left) + axisHalfWidth;
+            x2 = chartArea.right;
+        } else if (position === 'right') {
+            borderValue = alignBorderValue(this.left);
+            x1 = chartArea.left;
+            x2 = alignBorderValue(chartArea.right) - axisHalfWidth;
+            tx1 = borderValue + axisHalfWidth;
+            tx2 = this.left + tl;
+        } else if (axis === 'x') {
+            if (position === 'center') {
+                borderValue = alignBorderValue((chartArea.top + chartArea.bottom) / 2 + 0.5);
+            } else if (isObject(position)) {
+                const positionAxisID = Object.keys(position)[0];
+                const value = position[positionAxisID];
+                borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));
+            }
+            y1 = chartArea.top;
+            y2 = chartArea.bottom;
+            ty1 = borderValue + axisHalfWidth;
+            ty2 = ty1 + tl;
+        } else if (axis === 'y') {
+            if (position === 'center') {
+                borderValue = alignBorderValue((chartArea.left + chartArea.right) / 2);
+            } else if (isObject(position)) {
+                const positionAxisID = Object.keys(position)[0];
+                const value = position[positionAxisID];
+                borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));
+            }
+            tx1 = borderValue - axisHalfWidth;
+            tx2 = tx1 - tl;
+            x1 = chartArea.left;
+            x2 = chartArea.right;
+        }
+        const limit = valueOrDefault(options.ticks.maxTicksLimit, ticksLength);
+        const step = Math.max(1, Math.ceil(ticksLength / limit));
+        for(i = 0; i < ticksLength; i += step){
+            const context = this.getContext(i);
+            const optsAtIndex = grid.setContext(context);
+            const optsAtIndexBorder = border.setContext(context);
+            const lineWidth = optsAtIndex.lineWidth;
+            const lineColor = optsAtIndex.color;
+            const borderDash = optsAtIndexBorder.dash || [];
+            const borderDashOffset = optsAtIndexBorder.dashOffset;
+            const tickWidth = optsAtIndex.tickWidth;
+            const tickColor = optsAtIndex.tickColor;
+            const tickBorderDash = optsAtIndex.tickBorderDash || [];
+            const tickBorderDashOffset = optsAtIndex.tickBorderDashOffset;
+            lineValue = getPixelForGridLine(this, i, offset);
+            if (lineValue === undefined) {
+                continue;
+            }
+            alignedLineValue = _alignPixel(chart, lineValue, lineWidth);
+            if (isHorizontal) {
+                tx1 = tx2 = x1 = x2 = alignedLineValue;
+            } else {
+                ty1 = ty2 = y1 = y2 = alignedLineValue;
+            }
+            items.push({
+                tx1,
+                ty1,
+                tx2,
+                ty2,
+                x1,
+                y1,
+                x2,
+                y2,
+                width: lineWidth,
+                color: lineColor,
+                borderDash,
+                borderDashOffset,
+                tickWidth,
+                tickColor,
+                tickBorderDash,
+                tickBorderDashOffset
+            });
+        }
+        this._ticksLength = ticksLength;
+        this._borderValue = borderValue;
+        return items;
+    }
+ _computeLabelItems(chartArea) {
+        const axis = this.axis;
+        const options = this.options;
+        const { position , ticks: optionTicks  } = options;
+        const isHorizontal = this.isHorizontal();
+        const ticks = this.ticks;
+        const { align , crossAlign , padding , mirror  } = optionTicks;
+        const tl = getTickMarkLength(options.grid);
+        const tickAndPadding = tl + padding;
+        const hTickAndPadding = mirror ? -padding : tickAndPadding;
+        const rotation = -toRadians(this.labelRotation);
+        const items = [];
+        let i, ilen, tick, label, x, y, textAlign, pixel, font, lineHeight, lineCount, textOffset;
+        let textBaseline = 'middle';
+        if (position === 'top') {
+            y = this.bottom - hTickAndPadding;
+            textAlign = this._getXAxisLabelAlignment();
+        } else if (position === 'bottom') {
+            y = this.top + hTickAndPadding;
+            textAlign = this._getXAxisLabelAlignment();
+        } else if (position === 'left') {
+            const ret = this._getYAxisLabelAlignment(tl);
+            textAlign = ret.textAlign;
+            x = ret.x;
+        } else if (position === 'right') {
+            const ret = this._getYAxisLabelAlignment(tl);
+            textAlign = ret.textAlign;
+            x = ret.x;
+        } else if (axis === 'x') {
+            if (position === 'center') {
+                y = (chartArea.top + chartArea.bottom) / 2 + tickAndPadding;
+            } else if (isObject(position)) {
+                const positionAxisID = Object.keys(position)[0];
+                const value = position[positionAxisID];
+                y = this.chart.scales[positionAxisID].getPixelForValue(value) + tickAndPadding;
+            }
+            textAlign = this._getXAxisLabelAlignment();
+        } else if (axis === 'y') {
+            if (position === 'center') {
+                x = (chartArea.left + chartArea.right) / 2 - tickAndPadding;
+            } else if (isObject(position)) {
+                const positionAxisID = Object.keys(position)[0];
+                const value = position[positionAxisID];
+                x = this.chart.scales[positionAxisID].getPixelForValue(value);
+            }
+            textAlign = this._getYAxisLabelAlignment(tl).textAlign;
+        }
+        if (axis === 'y') {
+            if (align === 'start') {
+                textBaseline = 'top';
+            } else if (align === 'end') {
+                textBaseline = 'bottom';
+            }
+        }
+        const labelSizes = this._getLabelSizes();
+        for(i = 0, ilen = ticks.length; i < ilen; ++i){
+            tick = ticks[i];
+            label = tick.label;
+            const optsAtIndex = optionTicks.setContext(this.getContext(i));
+            pixel = this.getPixelForTick(i) + optionTicks.labelOffset;
+            font = this._resolveTickFontOptions(i);
+            lineHeight = font.lineHeight;
+            lineCount = isArray(label) ? label.length : 1;
+            const halfCount = lineCount / 2;
+            const color = optsAtIndex.color;
+            const strokeColor = optsAtIndex.textStrokeColor;
+            const strokeWidth = optsAtIndex.textStrokeWidth;
+            let tickTextAlign = textAlign;
+            if (isHorizontal) {
+                x = pixel;
+                if (textAlign === 'inner') {
+                    if (i === ilen - 1) {
+                        tickTextAlign = !this.options.reverse ? 'right' : 'left';
+                    } else if (i === 0) {
+                        tickTextAlign = !this.options.reverse ? 'left' : 'right';
+                    } else {
+                        tickTextAlign = 'center';
+                    }
+                }
+                if (position === 'top') {
+                    if (crossAlign === 'near' || rotation !== 0) {
+                        textOffset = -lineCount * lineHeight + lineHeight / 2;
+                    } else if (crossAlign === 'center') {
+                        textOffset = -labelSizes.highest.height / 2 - halfCount * lineHeight + lineHeight;
+                    } else {
+                        textOffset = -labelSizes.highest.height + lineHeight / 2;
+                    }
+                } else {
+                    if (crossAlign === 'near' || rotation !== 0) {
+                        textOffset = lineHeight / 2;
+                    } else if (crossAlign === 'center') {
+                        textOffset = labelSizes.highest.height / 2 - halfCount * lineHeight;
+                    } else {
+                        textOffset = labelSizes.highest.height - lineCount * lineHeight;
+                    }
+                }
+                if (mirror) {
+                    textOffset *= -1;
+                }
+                if (rotation !== 0 && !optsAtIndex.showLabelBackdrop) {
+                    x += lineHeight / 2 * Math.sin(rotation);
+                }
+            } else {
+                y = pixel;
+                textOffset = (1 - lineCount) * lineHeight / 2;
+            }
+            let backdrop;
+            if (optsAtIndex.showLabelBackdrop) {
+                const labelPadding = toPadding(optsAtIndex.backdropPadding);
+                const height = labelSizes.heights[i];
+                const width = labelSizes.widths[i];
+                let top = textOffset - labelPadding.top;
+                let left = 0 - labelPadding.left;
+                switch(textBaseline){
+                    case 'middle':
+                        top -= height / 2;
+                        break;
+                    case 'bottom':
+                        top -= height;
+                        break;
+                }
+                switch(textAlign){
+                    case 'center':
+                        left -= width / 2;
+                        break;
+                    case 'right':
+                        left -= width;
+                        break;
+                    case 'inner':
+                        if (i === ilen - 1) {
+                            left -= width;
+                        } else if (i > 0) {
+                            left -= width / 2;
+                        }
+                        break;
+                }
+                backdrop = {
+                    left,
+                    top,
+                    width: width + labelPadding.width,
+                    height: height + labelPadding.height,
+                    color: optsAtIndex.backdropColor
+                };
+            }
+            items.push({
+                label,
+                font,
+                textOffset,
+                options: {
+                    rotation,
+                    color,
+                    strokeColor,
+                    strokeWidth,
+                    textAlign: tickTextAlign,
+                    textBaseline,
+                    translation: [
+                        x,
+                        y
+                    ],
+                    backdrop
+                }
+            });
+        }
+        return items;
+    }
+    _getXAxisLabelAlignment() {
+        const { position , ticks  } = this.options;
+        const rotation = -toRadians(this.labelRotation);
+        if (rotation) {
+            return position === 'top' ? 'left' : 'right';
+        }
+        let align = 'center';
+        if (ticks.align === 'start') {
+            align = 'left';
+        } else if (ticks.align === 'end') {
+            align = 'right';
+        } else if (ticks.align === 'inner') {
+            align = 'inner';
+        }
+        return align;
+    }
+    _getYAxisLabelAlignment(tl) {
+        const { position , ticks: { crossAlign , mirror , padding  }  } = this.options;
+        const labelSizes = this._getLabelSizes();
+        const tickAndPadding = tl + padding;
+        const widest = labelSizes.widest.width;
+        let textAlign;
+        let x;
+        if (position === 'left') {
+            if (mirror) {
+                x = this.right + padding;
+                if (crossAlign === 'near') {
+                    textAlign = 'left';
+                } else if (crossAlign === 'center') {
+                    textAlign = 'center';
+                    x += widest / 2;
+                } else {
+                    textAlign = 'right';
+                    x += widest;
+                }
+            } else {
+                x = this.right - tickAndPadding;
+                if (crossAlign === 'near') {
+                    textAlign = 'right';
+                } else if (crossAlign === 'center') {
+                    textAlign = 'center';
+                    x -= widest / 2;
+                } else {
+                    textAlign = 'left';
+                    x = this.left;
+                }
+            }
+        } else if (position === 'right') {
+            if (mirror) {
+                x = this.left + padding;
+                if (crossAlign === 'near') {
+                    textAlign = 'right';
+                } else if (crossAlign === 'center') {
+                    textAlign = 'center';
+                    x -= widest / 2;
+                } else {
+                    textAlign = 'left';
+                    x -= widest;
+                }
+            } else {
+                x = this.left + tickAndPadding;
+                if (crossAlign === 'near') {
+                    textAlign = 'left';
+                } else if (crossAlign === 'center') {
+                    textAlign = 'center';
+                    x += widest / 2;
+                } else {
+                    textAlign = 'right';
+                    x = this.right;
+                }
+            }
+        } else {
+            textAlign = 'right';
+        }
+        return {
+            textAlign,
+            x
+        };
+    }
+ _computeLabelArea() {
+        if (this.options.ticks.mirror) {
+            return;
+        }
+        const chart = this.chart;
+        const position = this.options.position;
+        if (position === 'left' || position === 'right') {
+            return {
+                top: 0,
+                left: this.left,
+                bottom: chart.height,
+                right: this.right
+            };
+        }
+        if (position === 'top' || position === 'bottom') {
+            return {
+                top: this.top,
+                left: 0,
+                bottom: this.bottom,
+                right: chart.width
+            };
+        }
+    }
+ drawBackground() {
+        const { ctx , options: { backgroundColor  } , left , top , width , height  } = this;
+        if (backgroundColor) {
+            ctx.save();
+            ctx.fillStyle = backgroundColor;
+            ctx.fillRect(left, top, width, height);
+            ctx.restore();
+        }
+    }
+    getLineWidthForValue(value) {
+        const grid = this.options.grid;
+        if (!this._isVisible() || !grid.display) {
+            return 0;
+        }
+        const ticks = this.ticks;
+        const index = ticks.findIndex((t)=>t.value === value);
+        if (index >= 0) {
+            const opts = grid.setContext(this.getContext(index));
+            return opts.lineWidth;
+        }
+        return 0;
+    }
+ drawGrid(chartArea) {
+        const grid = this.options.grid;
+        const ctx = this.ctx;
+        const items = this._gridLineItems || (this._gridLineItems = this._computeGridLineItems(chartArea));
+        let i, ilen;
+        const drawLine = (p1, p2, style)=>{
+            if (!style.width || !style.color) {
+                return;
+            }
+            ctx.save();
+            ctx.lineWidth = style.width;
+            ctx.strokeStyle = style.color;
+            ctx.setLineDash(style.borderDash || []);
+            ctx.lineDashOffset = style.borderDashOffset;
+            ctx.beginPath();
+            ctx.moveTo(p1.x, p1.y);
+            ctx.lineTo(p2.x, p2.y);
+            ctx.stroke();
+            ctx.restore();
+        };
+        if (grid.display) {
+            for(i = 0, ilen = items.length; i < ilen; ++i){
+                const item = items[i];
+                if (grid.drawOnChartArea) {
+                    drawLine({
+                        x: item.x1,
+                        y: item.y1
+                    }, {
+                        x: item.x2,
+                        y: item.y2
+                    }, item);
+                }
+                if (grid.drawTicks) {
+                    drawLine({
+                        x: item.tx1,
+                        y: item.ty1
+                    }, {
+                        x: item.tx2,
+                        y: item.ty2
+                    }, {
+                        color: item.tickColor,
+                        width: item.tickWidth,
+                        borderDash: item.tickBorderDash,
+                        borderDashOffset: item.tickBorderDashOffset
+                    });
+                }
+            }
+        }
+    }
+ drawBorder() {
+        const { chart , ctx , options: { border , grid  }  } = this;
+        const borderOpts = border.setContext(this.getContext());
+        const axisWidth = border.display ? borderOpts.width : 0;
+        if (!axisWidth) {
+            return;
+        }
+        const lastLineWidth = grid.setContext(this.getContext(0)).lineWidth;
+        const borderValue = this._borderValue;
+        let x1, x2, y1, y2;
+        if (this.isHorizontal()) {
+            x1 = _alignPixel(chart, this.left, axisWidth) - axisWidth / 2;
+            x2 = _alignPixel(chart, this.right, lastLineWidth) + lastLineWidth / 2;
+            y1 = y2 = borderValue;
+        } else {
+            y1 = _alignPixel(chart, this.top, axisWidth) - axisWidth / 2;
+            y2 = _alignPixel(chart, this.bottom, lastLineWidth) + lastLineWidth / 2;
+            x1 = x2 = borderValue;
+        }
+        ctx.save();
+        ctx.lineWidth = borderOpts.width;
+        ctx.strokeStyle = borderOpts.color;
+        ctx.beginPath();
+        ctx.moveTo(x1, y1);
+        ctx.lineTo(x2, y2);
+        ctx.stroke();
+        ctx.restore();
+    }
+ drawLabels(chartArea) {
+        const optionTicks = this.options.ticks;
+        if (!optionTicks.display) {
+            return;
+        }
+        const ctx = this.ctx;
+        const area = this._computeLabelArea();
+        if (area) {
+            clipArea(ctx, area);
+        }
+        const items = this.getLabelItems(chartArea);
+        for (const item of items){
+            const renderTextOptions = item.options;
+            const tickFont = item.font;
+            const label = item.label;
+            const y = item.textOffset;
+            renderText(ctx, label, 0, y, tickFont, renderTextOptions);
+        }
+        if (area) {
+            unclipArea(ctx);
+        }
+    }
+ drawTitle() {
+        const { ctx , options: { position , title , reverse  }  } = this;
+        if (!title.display) {
+            return;
+        }
+        const font = toFont(title.font);
+        const padding = toPadding(title.padding);
+        const align = title.align;
+        let offset = font.lineHeight / 2;
+        if (position === 'bottom' || position === 'center' || isObject(position)) {
+            offset += padding.bottom;
+            if (isArray(title.text)) {
+                offset += font.lineHeight * (title.text.length - 1);
+            }
+        } else {
+            offset += padding.top;
+        }
+        const { titleX , titleY , maxWidth , rotation  } = titleArgs(this, offset, position, align);
+        renderText(ctx, title.text, 0, 0, font, {
+            color: title.color,
+            maxWidth,
+            rotation,
+            textAlign: titleAlign(align, position, reverse),
+            textBaseline: 'middle',
+            translation: [
+                titleX,
+                titleY
+            ]
+        });
+    }
+    draw(chartArea) {
+        if (!this._isVisible()) {
+            return;
+        }
+        this.drawBackground();
+        this.drawGrid(chartArea);
+        this.drawBorder();
+        this.drawTitle();
+        this.drawLabels(chartArea);
+    }
+ _layers() {
+        const opts = this.options;
+        const tz = opts.ticks && opts.ticks.z || 0;
+        const gz = valueOrDefault(opts.grid && opts.grid.z, -1);
+        const bz = valueOrDefault(opts.border && opts.border.z, 0);
+        if (!this._isVisible() || this.draw !== Scale.prototype.draw) {
+            return [
+                {
+                    z: tz,
+                    draw: (chartArea)=>{
+                        this.draw(chartArea);
+                    }
+                }
+            ];
+        }
+        return [
+            {
+                z: gz,
+                draw: (chartArea)=>{
+                    this.drawBackground();
+                    this.drawGrid(chartArea);
+                    this.drawTitle();
+                }
+            },
+            {
+                z: bz,
+                draw: ()=>{
+                    this.drawBorder();
+                }
+            },
+            {
+                z: tz,
+                draw: (chartArea)=>{
+                    this.drawLabels(chartArea);
+                }
+            }
+        ];
+    }
+ getMatchingVisibleMetas(type) {
+        const metas = this.chart.getSortedVisibleDatasetMetas();
+        const axisID = this.axis + 'AxisID';
+        const result = [];
+        let i, ilen;
+        for(i = 0, ilen = metas.length; i < ilen; ++i){
+            const meta = metas[i];
+            if (meta[axisID] === this.id && (!type || meta.type === type)) {
+                result.push(meta);
+            }
+        }
+        return result;
+    }
+ _resolveTickFontOptions(index) {
+        const opts = this.options.ticks.setContext(this.getContext(index));
+        return toFont(opts.font);
+    }
+ _maxDigits() {
+        const fontSize = this._resolveTickFontOptions(0).lineHeight;
+        return (this.isHorizontal() ? this.width : this.height) / fontSize;
+    }
+}
+
+class TypedRegistry {
+    constructor(type, scope, override){
+        this.type = type;
+        this.scope = scope;
+        this.override = override;
+        this.items = Object.create(null);
+    }
+    isForType(type) {
+        return Object.prototype.isPrototypeOf.call(this.type.prototype, type.prototype);
+    }
+ register(item) {
+        const proto = Object.getPrototypeOf(item);
+        let parentScope;
+        if (isIChartComponent(proto)) {
+            parentScope = this.register(proto);
+        }
+        const items = this.items;
+        const id = item.id;
+        const scope = this.scope + '.' + id;
+        if (!id) {
+            throw new Error('class does not have id: ' + item);
+        }
+        if (id in items) {
+            return scope;
+        }
+        items[id] = item;
+        registerDefaults(item, scope, parentScope);
+        if (this.override) {
+            defaults.override(item.id, item.overrides);
+        }
+        return scope;
+    }
+ get(id) {
+        return this.items[id];
+    }
+ unregister(item) {
+        const items = this.items;
+        const id = item.id;
+        const scope = this.scope;
+        if (id in items) {
+            delete items[id];
+        }
+        if (scope && id in defaults[scope]) {
+            delete defaults[scope][id];
+            if (this.override) {
+                delete overrides[id];
+            }
+        }
+    }
+}
+function registerDefaults(item, scope, parentScope) {
+    const itemDefaults = merge(Object.create(null), [
+        parentScope ? defaults.get(parentScope) : {},
+        defaults.get(scope),
+        item.defaults
+    ]);
+    defaults.set(scope, itemDefaults);
+    if (item.defaultRoutes) {
+        routeDefaults(scope, item.defaultRoutes);
+    }
+    if (item.descriptors) {
+        defaults.describe(scope, item.descriptors);
+    }
+}
+function routeDefaults(scope, routes) {
+    Object.keys(routes).forEach((property)=>{
+        const propertyParts = property.split('.');
+        const sourceName = propertyParts.pop();
+        const sourceScope = [
+            scope
+        ].concat(propertyParts).join('.');
+        const parts = routes[property].split('.');
+        const targetName = parts.pop();
+        const targetScope = parts.join('.');
+        defaults.route(sourceScope, sourceName, targetScope, targetName);
+    });
+}
+function isIChartComponent(proto) {
+    return 'id' in proto && 'defaults' in proto;
+}
+
+class Registry {
+    constructor(){
+        this.controllers = new TypedRegistry(DatasetController, 'datasets', true);
+        this.elements = new TypedRegistry(Element, 'elements');
+        this.plugins = new TypedRegistry(Object, 'plugins');
+        this.scales = new TypedRegistry(Scale, 'scales');
+        this._typedRegistries = [
+            this.controllers,
+            this.scales,
+            this.elements
+        ];
+    }
+ add(...args) {
+        this._each('register', args);
+    }
+    remove(...args) {
+        this._each('unregister', args);
+    }
+ addControllers(...args) {
+        this._each('register', args, this.controllers);
+    }
+ addElements(...args) {
+        this._each('register', args, this.elements);
+    }
+ addPlugins(...args) {
+        this._each('register', args, this.plugins);
+    }
+ addScales(...args) {
+        this._each('register', args, this.scales);
+    }
+ getController(id) {
+        return this._get(id, this.controllers, 'controller');
+    }
+ getElement(id) {
+        return this._get(id, this.elements, 'element');
+    }
+ getPlugin(id) {
+        return this._get(id, this.plugins, 'plugin');
+    }
+ getScale(id) {
+        return this._get(id, this.scales, 'scale');
+    }
+ removeControllers(...args) {
+        this._each('unregister', args, this.controllers);
+    }
+ removeElements(...args) {
+        this._each('unregister', args, this.elements);
+    }
+ removePlugins(...args) {
+        this._each('unregister', args, this.plugins);
+    }
+ removeScales(...args) {
+        this._each('unregister', args, this.scales);
+    }
+ _each(method, args, typedRegistry) {
+        [
+            ...args
+        ].forEach((arg)=>{
+            const reg = typedRegistry || this._getRegistryForType(arg);
+            if (typedRegistry || reg.isForType(arg) || reg === this.plugins && arg.id) {
+                this._exec(method, reg, arg);
+            } else {
+                each(arg, (item)=>{
+                    const itemReg = typedRegistry || this._getRegistryForType(item);
+                    this._exec(method, itemReg, item);
+                });
+            }
+        });
+    }
+ _exec(method, registry, component) {
+        const camelMethod = _capitalize(method);
+        callback(component['before' + camelMethod], [], component);
+        registry[method](component);
+        callback(component['after' + camelMethod], [], component);
+    }
+ _getRegistryForType(type) {
+        for(let i = 0; i < this._typedRegistries.length; i++){
+            const reg = this._typedRegistries[i];
+            if (reg.isForType(type)) {
+                return reg;
+            }
+        }
+        return this.plugins;
+    }
+ _get(id, typedRegistry, type) {
+        const item = typedRegistry.get(id);
+        if (item === undefined) {
+            throw new Error('"' + id + '" is not a registered ' + type + '.');
+        }
+        return item;
+    }
+}
+var registry = /* #__PURE__ */ new Registry();
+
+class PluginService {
+    constructor(){
+        this._init = [];
+    }
+ notify(chart, hook, args, filter) {
+        if (hook === 'beforeInit') {
+            this._init = this._createDescriptors(chart, true);
+            this._notify(this._init, chart, 'install');
+        }
+        const descriptors = filter ? this._descriptors(chart).filter(filter) : this._descriptors(chart);
+        const result = this._notify(descriptors, chart, hook, args);
+        if (hook === 'afterDestroy') {
+            this._notify(descriptors, chart, 'stop');
+            this._notify(this._init, chart, 'uninstall');
+        }
+        return result;
+    }
+ _notify(descriptors, chart, hook, args) {
+        args = args || {};
+        for (const descriptor of descriptors){
+            const plugin = descriptor.plugin;
+            const method = plugin[hook];
+            const params = [
+                chart,
+                args,
+                descriptor.options
+            ];
+            if (callback(method, params, plugin) === false && args.cancelable) {
+                return false;
+            }
+        }
+        return true;
+    }
+    invalidate() {
+        if (!isNullOrUndef(this._cache)) {
+            this._oldCache = this._cache;
+            this._cache = undefined;
+        }
+    }
+ _descriptors(chart) {
+        if (this._cache) {
+            return this._cache;
+        }
+        const descriptors = this._cache = this._createDescriptors(chart);
+        this._notifyStateChanges(chart);
+        return descriptors;
+    }
+    _createDescriptors(chart, all) {
+        const config = chart && chart.config;
+        const options = valueOrDefault(config.options && config.options.plugins, {});
+        const plugins = allPlugins(config);
+        return options === false && !all ? [] : createDescriptors(chart, plugins, options, all);
+    }
+ _notifyStateChanges(chart) {
+        const previousDescriptors = this._oldCache || [];
+        const descriptors = this._cache;
+        const diff = (a, b)=>a.filter((x)=>!b.some((y)=>x.plugin.id === y.plugin.id));
+        this._notify(diff(previousDescriptors, descriptors), chart, 'stop');
+        this._notify(diff(descriptors, previousDescriptors), chart, 'start');
+    }
+}
+ function allPlugins(config) {
+    const localIds = {};
+    const plugins = [];
+    const keys = Object.keys(registry.plugins.items);
+    for(let i = 0; i < keys.length; i++){
+        plugins.push(registry.getPlugin(keys[i]));
+    }
+    const local = config.plugins || [];
+    for(let i = 0; i < local.length; i++){
+        const plugin = local[i];
+        if (plugins.indexOf(plugin) === -1) {
+            plugins.push(plugin);
+            localIds[plugin.id] = true;
+        }
+    }
+    return {
+        plugins,
+        localIds
+    };
+}
+function getOpts(options, all) {
+    if (!all && options === false) {
+        return null;
+    }
+    if (options === true) {
+        return {};
+    }
+    return options;
+}
+function createDescriptors(chart, { plugins , localIds  }, options, all) {
+    const result = [];
+    const context = chart.getContext();
+    for (const plugin of plugins){
+        const id = plugin.id;
+        const opts = getOpts(options[id], all);
+        if (opts === null) {
+            continue;
+        }
+        result.push({
+            plugin,
+            options: pluginOpts(chart.config, {
+                plugin,
+                local: localIds[id]
+            }, opts, context)
+        });
+    }
+    return result;
+}
+function pluginOpts(config, { plugin , local  }, opts, context) {
+    const keys = config.pluginScopeKeys(plugin);
+    const scopes = config.getOptionScopes(opts, keys);
+    if (local && plugin.defaults) {
+        scopes.push(plugin.defaults);
+    }
+    return config.createResolver(scopes, context, [
+        ''
+    ], {
+        scriptable: false,
+        indexable: false,
+        allKeys: true
+    });
+}
+
+function getIndexAxis(type, options) {
+    const datasetDefaults = defaults.datasets[type] || {};
+    const datasetOptions = (options.datasets || {})[type] || {};
+    return datasetOptions.indexAxis || options.indexAxis || datasetDefaults.indexAxis || 'x';
+}
+function getAxisFromDefaultScaleID(id, indexAxis) {
+    let axis = id;
+    if (id === '_index_') {
+        axis = indexAxis;
+    } else if (id === '_value_') {
+        axis = indexAxis === 'x' ? 'y' : 'x';
+    }
+    return axis;
+}
+function getDefaultScaleIDFromAxis(axis, indexAxis) {
+    return axis === indexAxis ? '_index_' : '_value_';
+}
+function idMatchesAxis(id) {
+    if (id === 'x' || id === 'y' || id === 'r') {
+        return id;
+    }
+}
+function axisFromPosition(position) {
+    if (position === 'top' || position === 'bottom') {
+        return 'x';
+    }
+    if (position === 'left' || position === 'right') {
+        return 'y';
+    }
+}
+function determineAxis(id, ...scaleOptions) {
+    if (idMatchesAxis(id)) {
+        return id;
+    }
+    for (const opts of scaleOptions){
+        const axis = opts.axis || axisFromPosition(opts.position) || id.length > 1 && idMatchesAxis(id[0].toLowerCase());
+        if (axis) {
+            return axis;
+        }
+    }
+    throw new Error(`Cannot determine type of '${id}' axis. Please provide 'axis' or 'position' option.`);
+}
+function getAxisFromDataset(id, axis, dataset) {
+    if (dataset[axis + 'AxisID'] === id) {
+        return {
+            axis
+        };
+    }
+}
+function retrieveAxisFromDatasets(id, config) {
+    if (config.data && config.data.datasets) {
+        const boundDs = config.data.datasets.filter((d)=>d.xAxisID === id || d.yAxisID === id);
+        if (boundDs.length) {
+            return getAxisFromDataset(id, 'x', boundDs[0]) || getAxisFromDataset(id, 'y', boundDs[0]);
+        }
+    }
+    return {};
+}
+function mergeScaleConfig(config, options) {
+    const chartDefaults = overrides[config.type] || {
+        scales: {}
+    };
+    const configScales = options.scales || {};
+    const chartIndexAxis = getIndexAxis(config.type, options);
+    const scales = Object.create(null);
+    Object.keys(configScales).forEach((id)=>{
+        const scaleConf = configScales[id];
+        if (!isObject(scaleConf)) {
+            return console.error(`Invalid scale configuration for scale: ${id}`);
+        }
+        if (scaleConf._proxy) {
+            return console.warn(`Ignoring resolver passed as options for scale: ${id}`);
+        }
+        const axis = determineAxis(id, scaleConf, retrieveAxisFromDatasets(id, config), defaults.scales[scaleConf.type]);
+        const defaultId = getDefaultScaleIDFromAxis(axis, chartIndexAxis);
+        const defaultScaleOptions = chartDefaults.scales || {};
+        scales[id] = mergeIf(Object.create(null), [
+            {
+                axis
+            },
+            scaleConf,
+            defaultScaleOptions[axis],
+            defaultScaleOptions[defaultId]
+        ]);
+    });
+    config.data.datasets.forEach((dataset)=>{
+        const type = dataset.type || config.type;
+        const indexAxis = dataset.indexAxis || getIndexAxis(type, options);
+        const datasetDefaults = overrides[type] || {};
+        const defaultScaleOptions = datasetDefaults.scales || {};
+        Object.keys(defaultScaleOptions).forEach((defaultID)=>{
+            const axis = getAxisFromDefaultScaleID(defaultID, indexAxis);
+            const id = dataset[axis + 'AxisID'] || axis;
+            scales[id] = scales[id] || Object.create(null);
+            mergeIf(scales[id], [
+                {
+                    axis
+                },
+                configScales[id],
+                defaultScaleOptions[defaultID]
+            ]);
+        });
+    });
+    Object.keys(scales).forEach((key)=>{
+        const scale = scales[key];
+        mergeIf(scale, [
+            defaults.scales[scale.type],
+            defaults.scale
+        ]);
+    });
+    return scales;
+}
+function initOptions(config) {
+    const options = config.options || (config.options = {});
+    options.plugins = valueOrDefault(options.plugins, {});
+    options.scales = mergeScaleConfig(config, options);
+}
+function initData(data) {
+    data = data || {};
+    data.datasets = data.datasets || [];
+    data.labels = data.labels || [];
+    return data;
+}
+function initConfig(config) {
+    config = config || {};
+    config.data = initData(config.data);
+    initOptions(config);
+    return config;
+}
+const keyCache = new Map();
+const keysCached = new Set();
+function cachedKeys(cacheKey, generate) {
+    let keys = keyCache.get(cacheKey);
+    if (!keys) {
+        keys = generate();
+        keyCache.set(cacheKey, keys);
+        keysCached.add(keys);
+    }
+    return keys;
+}
+const addIfFound = (set, obj, key)=>{
+    const opts = resolveObjectKey(obj, key);
+    if (opts !== undefined) {
+        set.add(opts);
+    }
+};
+class Config {
+    constructor(config){
+        this._config = initConfig(config);
+        this._scopeCache = new Map();
+        this._resolverCache = new Map();
+    }
+    get platform() {
+        return this._config.platform;
+    }
+    get type() {
+        return this._config.type;
+    }
+    set type(type) {
+        this._config.type = type;
+    }
+    get data() {
+        return this._config.data;
+    }
+    set data(data) {
+        this._config.data = initData(data);
+    }
+    get options() {
+        return this._config.options;
+    }
+    set options(options) {
+        this._config.options = options;
+    }
+    get plugins() {
+        return this._config.plugins;
+    }
+    update() {
+        const config = this._config;
+        this.clearCache();
+        initOptions(config);
+    }
+    clearCache() {
+        this._scopeCache.clear();
+        this._resolverCache.clear();
+    }
+ datasetScopeKeys(datasetType) {
+        return cachedKeys(datasetType, ()=>[
+                [
+                    `datasets.${datasetType}`,
+                    ''
+                ]
+            ]);
+    }
+ datasetAnimationScopeKeys(datasetType, transition) {
+        return cachedKeys(`${datasetType}.transition.${transition}`, ()=>[
+                [
+                    `datasets.${datasetType}.transitions.${transition}`,
+                    `transitions.${transition}`
+                ],
+                [
+                    `datasets.${datasetType}`,
+                    ''
+                ]
+            ]);
+    }
+ datasetElementScopeKeys(datasetType, elementType) {
+        return cachedKeys(`${datasetType}-${elementType}`, ()=>[
+                [
+                    `datasets.${datasetType}.elements.${elementType}`,
+                    `datasets.${datasetType}`,
+                    `elements.${elementType}`,
+                    ''
+                ]
+            ]);
+    }
+ pluginScopeKeys(plugin) {
+        const id = plugin.id;
+        const type = this.type;
+        return cachedKeys(`${type}-plugin-${id}`, ()=>[
+                [
+                    `plugins.${id}`,
+                    ...plugin.additionalOptionScopes || []
+                ]
+            ]);
+    }
+ _cachedScopes(mainScope, resetCache) {
+        const _scopeCache = this._scopeCache;
+        let cache = _scopeCache.get(mainScope);
+        if (!cache || resetCache) {
+            cache = new Map();
+            _scopeCache.set(mainScope, cache);
+        }
+        return cache;
+    }
+ getOptionScopes(mainScope, keyLists, resetCache) {
+        const { options , type  } = this;
+        const cache = this._cachedScopes(mainScope, resetCache);
+        const cached = cache.get(keyLists);
+        if (cached) {
+            return cached;
+        }
+        const scopes = new Set();
+        keyLists.forEach((keys)=>{
+            if (mainScope) {
+                scopes.add(mainScope);
+                keys.forEach((key)=>addIfFound(scopes, mainScope, key));
+            }
+            keys.forEach((key)=>addIfFound(scopes, options, key));
+            keys.forEach((key)=>addIfFound(scopes, overrides[type] || {}, key));
+            keys.forEach((key)=>addIfFound(scopes, defaults, key));
+            keys.forEach((key)=>addIfFound(scopes, descriptors, key));
+        });
+        const array = Array.from(scopes);
+        if (array.length === 0) {
+            array.push(Object.create(null));
+        }
+        if (keysCached.has(keyLists)) {
+            cache.set(keyLists, array);
+        }
+        return array;
+    }
+ chartOptionScopes() {
+        const { options , type  } = this;
+        return [
+            options,
+            overrides[type] || {},
+            defaults.datasets[type] || {},
+            {
+                type
+            },
+            defaults,
+            descriptors
+        ];
+    }
+ resolveNamedOptions(scopes, names, context, prefixes = [
+        ''
+    ]) {
+        const result = {
+            $shared: true
+        };
+        const { resolver , subPrefixes  } = getResolver(this._resolverCache, scopes, prefixes);
+        let options = resolver;
+        if (needContext(resolver, names)) {
+            result.$shared = false;
+            context = isFunction(context) ? context() : context;
+            const subResolver = this.createResolver(scopes, context, subPrefixes);
+            options = _attachContext(resolver, context, subResolver);
+        }
+        for (const prop of names){
+            result[prop] = options[prop];
+        }
+        return result;
+    }
+ createResolver(scopes, context, prefixes = [
+        ''
+    ], descriptorDefaults) {
+        const { resolver  } = getResolver(this._resolverCache, scopes, prefixes);
+        return isObject(context) ? _attachContext(resolver, context, undefined, descriptorDefaults) : resolver;
+    }
+}
+function getResolver(resolverCache, scopes, prefixes) {
+    let cache = resolverCache.get(scopes);
+    if (!cache) {
+        cache = new Map();
+        resolverCache.set(scopes, cache);
+    }
+    const cacheKey = prefixes.join();
+    let cached = cache.get(cacheKey);
+    if (!cached) {
+        const resolver = _createResolver(scopes, prefixes);
+        cached = {
+            resolver,
+            subPrefixes: prefixes.filter((p)=>!p.toLowerCase().includes('hover'))
+        };
+        cache.set(cacheKey, cached);
+    }
+    return cached;
+}
+const hasFunction = (value)=>isObject(value) && Object.getOwnPropertyNames(value).some((key)=>isFunction(value[key]));
+function needContext(proxy, names) {
+    const { isScriptable , isIndexable  } = _descriptors(proxy);
+    for (const prop of names){
+        const scriptable = isScriptable(prop);
+        const indexable = isIndexable(prop);
+        const value = (indexable || scriptable) && proxy[prop];
+        if (scriptable && (isFunction(value) || hasFunction(value)) || indexable && isArray(value)) {
+            return true;
+        }
+    }
+    return false;
+}
+
+var version = "4.5.0";
+
+const KNOWN_POSITIONS = [
+    'top',
+    'bottom',
+    'left',
+    'right',
+    'chartArea'
+];
+function positionIsHorizontal(position, axis) {
+    return position === 'top' || position === 'bottom' || KNOWN_POSITIONS.indexOf(position) === -1 && axis === 'x';
+}
+function compare2Level(l1, l2) {
+    return function(a, b) {
+        return a[l1] === b[l1] ? a[l2] - b[l2] : a[l1] - b[l1];
+    };
+}
+function onAnimationsComplete(context) {
+    const chart = context.chart;
+    const animationOptions = chart.options.animation;
+    chart.notifyPlugins('afterRender');
+    callback(animationOptions && animationOptions.onComplete, [
+        context
+    ], chart);
+}
+function onAnimationProgress(context) {
+    const chart = context.chart;
+    const animationOptions = chart.options.animation;
+    callback(animationOptions && animationOptions.onProgress, [
+        context
+    ], chart);
+}
+ function getCanvas(item) {
+    if (_isDomSupported() && typeof item === 'string') {
+        item = document.getElementById(item);
+    } else if (item && item.length) {
+        item = item[0];
+    }
+    if (item && item.canvas) {
+        item = item.canvas;
+    }
+    return item;
+}
+const instances = {};
+const getChart = (key)=>{
+    const canvas = getCanvas(key);
+    return Object.values(instances).filter((c)=>c.canvas === canvas).pop();
+};
+function moveNumericKeys(obj, start, move) {
+    const keys = Object.keys(obj);
+    for (const key of keys){
+        const intKey = +key;
+        if (intKey >= start) {
+            const value = obj[key];
+            delete obj[key];
+            if (move > 0 || intKey > start) {
+                obj[intKey + move] = value;
+            }
+        }
+    }
+}
+ function determineLastEvent(e, lastEvent, inChartArea, isClick) {
+    if (!inChartArea || e.type === 'mouseout') {
+        return null;
+    }
+    if (isClick) {
+        return lastEvent;
+    }
+    return e;
+}
+class Chart {
+    static defaults = defaults;
+    static instances = instances;
+    static overrides = overrides;
+    static registry = registry;
+    static version = version;
+    static getChart = getChart;
+    static register(...items) {
+        registry.add(...items);
+        invalidatePlugins();
+    }
+    static unregister(...items) {
+        registry.remove(...items);
+        invalidatePlugins();
+    }
+    constructor(item, userConfig){
+        const config = this.config = new Config(userConfig);
+        const initialCanvas = getCanvas(item);
+        const existingChart = getChart(initialCanvas);
+        if (existingChart) {
+            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.');
+        }
+        const options = config.createResolver(config.chartOptionScopes(), this.getContext());
+        this.platform = new (config.platform || _detectPlatform(initialCanvas))();
+        this.platform.updateConfig(config);
+        const context = this.platform.acquireContext(initialCanvas, options.aspectRatio);
+        const canvas = context && context.canvas;
+        const height = canvas && canvas.height;
+        const width = canvas && canvas.width;
+        this.id = uid();
+        this.ctx = context;
+        this.canvas = canvas;
+        this.width = width;
+        this.height = height;
+        this._options = options;
+        this._aspectRatio = this.aspectRatio;
+        this._layers = [];
+        this._metasets = [];
+        this._stacks = undefined;
+        this.boxes = [];
+        this.currentDevicePixelRatio = undefined;
+        this.chartArea = undefined;
+        this._active = [];
+        this._lastEvent = undefined;
+        this._listeners = {};
+         this._responsiveListeners = undefined;
+        this._sortedMetasets = [];
+        this.scales = {};
+        this._plugins = new PluginService();
+        this.$proxies = {};
+        this._hiddenIndices = {};
+        this.attached = false;
+        this._animationsDisabled = undefined;
+        this.$context = undefined;
+        this._doResize = debounce((mode)=>this.update(mode), options.resizeDelay || 0);
+        this._dataChanges = [];
+        instances[this.id] = this;
+        if (!context || !canvas) {
+            console.error("Failed to create chart: can't acquire context from the given item");
+            return;
+        }
+        animator.listen(this, 'complete', onAnimationsComplete);
+        animator.listen(this, 'progress', onAnimationProgress);
+        this._initialize();
+        if (this.attached) {
+            this.update();
+        }
+    }
+    get aspectRatio() {
+        const { options: { aspectRatio , maintainAspectRatio  } , width , height , _aspectRatio  } = this;
+        if (!isNullOrUndef(aspectRatio)) {
+            return aspectRatio;
+        }
+        if (maintainAspectRatio && _aspectRatio) {
+            return _aspectRatio;
+        }
+        return height ? width / height : null;
+    }
+    get data() {
+        return this.config.data;
+    }
+    set data(data) {
+        this.config.data = data;
+    }
+    get options() {
+        return this._options;
+    }
+    set options(options) {
+        this.config.options = options;
+    }
+    get registry() {
+        return registry;
+    }
+ _initialize() {
+        this.notifyPlugins('beforeInit');
+        if (this.options.responsive) {
+            this.resize();
+        } else {
+            retinaScale(this, this.options.devicePixelRatio);
+        }
+        this.bindEvents();
+        this.notifyPlugins('afterInit');
+        return this;
+    }
+    clear() {
+        clearCanvas(this.canvas, this.ctx);
+        return this;
+    }
+    stop() {
+        animator.stop(this);
+        return this;
+    }
+ resize(width, height) {
+        if (!animator.running(this)) {
+            this._resize(width, height);
+        } else {
+            this._resizeBeforeDraw = {
+                width,
+                height
+            };
+        }
+    }
+    _resize(width, height) {
+        const options = this.options;
+        const canvas = this.canvas;
+        const aspectRatio = options.maintainAspectRatio && this.aspectRatio;
+        const newSize = this.platform.getMaximumSize(canvas, width, height, aspectRatio);
+        const newRatio = options.devicePixelRatio || this.platform.getDevicePixelRatio();
+        const mode = this.width ? 'resize' : 'attach';
+        this.width = newSize.width;
+        this.height = newSize.height;
+        this._aspectRatio = this.aspectRatio;
+        if (!retinaScale(this, newRatio, true)) {
+            return;
+        }
+        this.notifyPlugins('resize', {
+            size: newSize
+        });
+        callback(options.onResize, [
+            this,
+            newSize
+        ], this);
+        if (this.attached) {
+            if (this._doResize(mode)) {
+                this.render();
+            }
+        }
+    }
+    ensureScalesHaveIDs() {
+        const options = this.options;
+        const scalesOptions = options.scales || {};
+        each(scalesOptions, (axisOptions, axisID)=>{
+            axisOptions.id = axisID;
+        });
+    }
+ buildOrUpdateScales() {
+        const options = this.options;
+        const scaleOpts = options.scales;
+        const scales = this.scales;
+        const updated = Object.keys(scales).reduce((obj, id)=>{
+            obj[id] = false;
+            return obj;
+        }, {});
+        let items = [];
+        if (scaleOpts) {
+            items = items.concat(Object.keys(scaleOpts).map((id)=>{
+                const scaleOptions = scaleOpts[id];
+                const axis = determineAxis(id, scaleOptions);
+                const isRadial = axis === 'r';
+                const isHorizontal = axis === 'x';
+                return {
+                    options: scaleOptions,
+                    dposition: isRadial ? 'chartArea' : isHorizontal ? 'bottom' : 'left',
+                    dtype: isRadial ? 'radialLinear' : isHorizontal ? 'category' : 'linear'
+                };
+            }));
+        }
+        each(items, (item)=>{
+            const scaleOptions = item.options;
+            const id = scaleOptions.id;
+            const axis = determineAxis(id, scaleOptions);
+            const scaleType = valueOrDefault(scaleOptions.type, item.dtype);
+            if (scaleOptions.position === undefined || positionIsHorizontal(scaleOptions.position, axis) !== positionIsHorizontal(item.dposition)) {
+                scaleOptions.position = item.dposition;
+            }
+            updated[id] = true;
+            let scale = null;
+            if (id in scales && scales[id].type === scaleType) {
+                scale = scales[id];
+            } else {
+                const scaleClass = registry.getScale(scaleType);
+                scale = new scaleClass({
+                    id,
+                    type: scaleType,
+                    ctx: this.ctx,
+                    chart: this
+                });
+                scales[scale.id] = scale;
+            }
+            scale.init(scaleOptions, options);
+        });
+        each(updated, (hasUpdated, id)=>{
+            if (!hasUpdated) {
+                delete scales[id];
+            }
+        });
+        each(scales, (scale)=>{
+            layouts.configure(this, scale, scale.options);
+            layouts.addBox(this, scale);
+        });
+    }
+ _updateMetasets() {
+        const metasets = this._metasets;
+        const numData = this.data.datasets.length;
+        const numMeta = metasets.length;
+        metasets.sort((a, b)=>a.index - b.index);
+        if (numMeta > numData) {
+            for(let i = numData; i < numMeta; ++i){
+                this._destroyDatasetMeta(i);
+            }
+            metasets.splice(numData, numMeta - numData);
+        }
+        this._sortedMetasets = metasets.slice(0).sort(compare2Level('order', 'index'));
+    }
+ _removeUnreferencedMetasets() {
+        const { _metasets: metasets , data: { datasets  }  } = this;
+        if (metasets.length > datasets.length) {
+            delete this._stacks;
+        }
+        metasets.forEach((meta, index)=>{
+            if (datasets.filter((x)=>x === meta._dataset).length === 0) {
+                this._destroyDatasetMeta(index);
+            }
+        });
+    }
+    buildOrUpdateControllers() {
+        const newControllers = [];
+        const datasets = this.data.datasets;
+        let i, ilen;
+        this._removeUnreferencedMetasets();
+        for(i = 0, ilen = datasets.length; i < ilen; i++){
+            const dataset = datasets[i];
+            let meta = this.getDatasetMeta(i);
+            const type = dataset.type || this.config.type;
+            if (meta.type && meta.type !== type) {
+                this._destroyDatasetMeta(i);
+                meta = this.getDatasetMeta(i);
+            }
+            meta.type = type;
+            meta.indexAxis = dataset.indexAxis || getIndexAxis(type, this.options);
+            meta.order = dataset.order || 0;
+            meta.index = i;
+            meta.label = '' + dataset.label;
+            meta.visible = this.isDatasetVisible(i);
+            if (meta.controller) {
+                meta.controller.updateIndex(i);
+                meta.controller.linkScales();
+            } else {
+                const ControllerClass = registry.getController(type);
+                const { datasetElementType , dataElementType  } = defaults.datasets[type];
+                Object.assign(ControllerClass, {
+                    dataElementType: registry.getElement(dataElementType),
+                    datasetElementType: datasetElementType && registry.getElement(datasetElementType)
+                });
+                meta.controller = new ControllerClass(this, i);
+                newControllers.push(meta.controller);
+            }
+        }
+        this._updateMetasets();
+        return newControllers;
+    }
+ _resetElements() {
+        each(this.data.datasets, (dataset, datasetIndex)=>{
+            this.getDatasetMeta(datasetIndex).controller.reset();
+        }, this);
+    }
+ reset() {
+        this._resetElements();
+        this.notifyPlugins('reset');
+    }
+    update(mode) {
+        const config = this.config;
+        config.update();
+        const options = this._options = config.createResolver(config.chartOptionScopes(), this.getContext());
+        const animsDisabled = this._animationsDisabled = !options.animation;
+        this._updateScales();
+        this._checkEventBindings();
+        this._updateHiddenIndices();
+        this._plugins.invalidate();
+        if (this.notifyPlugins('beforeUpdate', {
+            mode,
+            cancelable: true
+        }) === false) {
+            return;
+        }
+        const newControllers = this.buildOrUpdateControllers();
+        this.notifyPlugins('beforeElementsUpdate');
+        let minPadding = 0;
+        for(let i = 0, ilen = this.data.datasets.length; i < ilen; i++){
+            const { controller  } = this.getDatasetMeta(i);
+            const reset = !animsDisabled && newControllers.indexOf(controller) === -1;
+            controller.buildOrUpdateElements(reset);
+            minPadding = Math.max(+controller.getMaxOverflow(), minPadding);
+        }
+        minPadding = this._minPadding = options.layout.autoPadding ? minPadding : 0;
+        this._updateLayout(minPadding);
+        if (!animsDisabled) {
+            each(newControllers, (controller)=>{
+                controller.reset();
+            });
+        }
+        this._updateDatasets(mode);
+        this.notifyPlugins('afterUpdate', {
+            mode
+        });
+        this._layers.sort(compare2Level('z', '_idx'));
+        const { _active , _lastEvent  } = this;
+        if (_lastEvent) {
+            this._eventHandler(_lastEvent, true);
+        } else if (_active.length) {
+            this._updateHoverStyles(_active, _active, true);
+        }
+        this.render();
+    }
+ _updateScales() {
+        each(this.scales, (scale)=>{
+            layouts.removeBox(this, scale);
+        });
+        this.ensureScalesHaveIDs();
+        this.buildOrUpdateScales();
+    }
+ _checkEventBindings() {
+        const options = this.options;
+        const existingEvents = new Set(Object.keys(this._listeners));
+        const newEvents = new Set(options.events);
+        if (!setsEqual(existingEvents, newEvents) || !!this._responsiveListeners !== options.responsive) {
+            this.unbindEvents();
+            this.bindEvents();
+        }
+    }
+ _updateHiddenIndices() {
+        const { _hiddenIndices  } = this;
+        const changes = this._getUniformDataChanges() || [];
+        for (const { method , start , count  } of changes){
+            const move = method === '_removeElements' ? -count : count;
+            moveNumericKeys(_hiddenIndices, start, move);
+        }
+    }
+ _getUniformDataChanges() {
+        const _dataChanges = this._dataChanges;
+        if (!_dataChanges || !_dataChanges.length) {
+            return;
+        }
+        this._dataChanges = [];
+        const datasetCount = this.data.datasets.length;
+        const makeSet = (idx)=>new Set(_dataChanges.filter((c)=>c[0] === idx).map((c, i)=>i + ',' + c.splice(1).join(',')));
+        const changeSet = makeSet(0);
+        for(let i = 1; i < datasetCount; i++){
+            if (!setsEqual(changeSet, makeSet(i))) {
+                return;
+            }
+        }
+        return Array.from(changeSet).map((c)=>c.split(',')).map((a)=>({
+                method: a[1],
+                start: +a[2],
+                count: +a[3]
+            }));
+    }
+ _updateLayout(minPadding) {
+        if (this.notifyPlugins('beforeLayout', {
+            cancelable: true
+        }) === false) {
+            return;
+        }
+        layouts.update(this, this.width, this.height, minPadding);
+        const area = this.chartArea;
+        const noArea = area.width <= 0 || area.height <= 0;
+        this._layers = [];
+        each(this.boxes, (box)=>{
+            if (noArea && box.position === 'chartArea') {
+                return;
+            }
+            if (box.configure) {
+                box.configure();
+            }
+            this._layers.push(...box._layers());
+        }, this);
+        this._layers.forEach((item, index)=>{
+            item._idx = index;
+        });
+        this.notifyPlugins('afterLayout');
+    }
+ _updateDatasets(mode) {
+        if (this.notifyPlugins('beforeDatasetsUpdate', {
+            mode,
+            cancelable: true
+        }) === false) {
+            return;
+        }
+        for(let i = 0, ilen = this.data.datasets.length; i < ilen; ++i){
+            this.getDatasetMeta(i).controller.configure();
+        }
+        for(let i = 0, ilen = this.data.datasets.length; i < ilen; ++i){
+            this._updateDataset(i, isFunction(mode) ? mode({
+                datasetIndex: i
+            }) : mode);
+        }
+        this.notifyPlugins('afterDatasetsUpdate', {
+            mode
+        });
+    }
+ _updateDataset(index, mode) {
+        const meta = this.getDatasetMeta(index);
+        const args = {
+            meta,
+            index,
+            mode,
+            cancelable: true
+        };
+        if (this.notifyPlugins('beforeDatasetUpdate', args) === false) {
+            return;
+        }
+        meta.controller._update(mode);
+        args.cancelable = false;
+        this.notifyPlugins('afterDatasetUpdate', args);
+    }
+    render() {
+        if (this.notifyPlugins('beforeRender', {
+            cancelable: true
+        }) === false) {
+            return;
+        }
+        if (animator.has(this)) {
+            if (this.attached && !animator.running(this)) {
+                animator.start(this);
+            }
+        } else {
+            this.draw();
+            onAnimationsComplete({
+                chart: this
+            });
+        }
+    }
+    draw() {
+        let i;
+        if (this._resizeBeforeDraw) {
+            const { width , height  } = this._resizeBeforeDraw;
+            this._resizeBeforeDraw = null;
+            this._resize(width, height);
+        }
+        this.clear();
+        if (this.width <= 0 || this.height <= 0) {
+            return;
+        }
+        if (this.notifyPlugins('beforeDraw', {
+            cancelable: true
+        }) === false) {
+            return;
+        }
+        const layers = this._layers;
+        for(i = 0; i < layers.length && layers[i].z <= 0; ++i){
+            layers[i].draw(this.chartArea);
+        }
+        this._drawDatasets();
+        for(; i < layers.length; ++i){
+            layers[i].draw(this.chartArea);
+        }
+        this.notifyPlugins('afterDraw');
+    }
+ _getSortedDatasetMetas(filterVisible) {
+        const metasets = this._sortedMetasets;
+        const result = [];
+        let i, ilen;
+        for(i = 0, ilen = metasets.length; i < ilen; ++i){
+            const meta = metasets[i];
+            if (!filterVisible || meta.visible) {
+                result.push(meta);
+            }
+        }
+        return result;
+    }
+ getSortedVisibleDatasetMetas() {
+        return this._getSortedDatasetMetas(true);
+    }
+ _drawDatasets() {
+        if (this.notifyPlugins('beforeDatasetsDraw', {
+            cancelable: true
+        }) === false) {
+            return;
+        }
+        const metasets = this.getSortedVisibleDatasetMetas();
+        for(let i = metasets.length - 1; i >= 0; --i){
+            this._drawDataset(metasets[i]);
+        }
+        this.notifyPlugins('afterDatasetsDraw');
+    }
+ _drawDataset(meta) {
+        const ctx = this.ctx;
+        const args = {
+            meta,
+            index: meta.index,
+            cancelable: true
+        };
+        const clip = getDatasetClipArea(this, meta);
+        if (this.notifyPlugins('beforeDatasetDraw', args) === false) {
+            return;
+        }
+        if (clip) {
+            clipArea(ctx, clip);
+        }
+        meta.controller.draw();
+        if (clip) {
+            unclipArea(ctx);
+        }
+        args.cancelable = false;
+        this.notifyPlugins('afterDatasetDraw', args);
+    }
+ isPointInArea(point) {
+        return _isPointInArea(point, this.chartArea, this._minPadding);
+    }
+    getElementsAtEventForMode(e, mode, options, useFinalPosition) {
+        const method = Interaction.modes[mode];
+        if (typeof method === 'function') {
+            return method(this, e, options, useFinalPosition);
+        }
+        return [];
+    }
+    getDatasetMeta(datasetIndex) {
+        const dataset = this.data.datasets[datasetIndex];
+        const metasets = this._metasets;
+        let meta = metasets.filter((x)=>x && x._dataset === dataset).pop();
+        if (!meta) {
+            meta = {
+                type: null,
+                data: [],
+                dataset: null,
+                controller: null,
+                hidden: null,
+                xAxisID: null,
+                yAxisID: null,
+                order: dataset && dataset.order || 0,
+                index: datasetIndex,
+                _dataset: dataset,
+                _parsed: [],
+                _sorted: false
+            };
+            metasets.push(meta);
+        }
+        return meta;
+    }
+    getContext() {
+        return this.$context || (this.$context = createContext(null, {
+            chart: this,
+            type: 'chart'
+        }));
+    }
+    getVisibleDatasetCount() {
+        return this.getSortedVisibleDatasetMetas().length;
+    }
+    isDatasetVisible(datasetIndex) {
+        const dataset = this.data.datasets[datasetIndex];
+        if (!dataset) {
+            return false;
+        }
+        const meta = this.getDatasetMeta(datasetIndex);
+        return typeof meta.hidden === 'boolean' ? !meta.hidden : !dataset.hidden;
+    }
+    setDatasetVisibility(datasetIndex, visible) {
+        const meta = this.getDatasetMeta(datasetIndex);
+        meta.hidden = !visible;
+    }
+    toggleDataVisibility(index) {
+        this._hiddenIndices[index] = !this._hiddenIndices[index];
+    }
+    getDataVisibility(index) {
+        return !this._hiddenIndices[index];
+    }
+ _updateVisibility(datasetIndex, dataIndex, visible) {
+        const mode = visible ? 'show' : 'hide';
+        const meta = this.getDatasetMeta(datasetIndex);
+        const anims = meta.controller._resolveAnimations(undefined, mode);
+        if (defined(dataIndex)) {
+            meta.data[dataIndex].hidden = !visible;
+            this.update();
+        } else {
+            this.setDatasetVisibility(datasetIndex, visible);
+            anims.update(meta, {
+                visible
+            });
+            this.update((ctx)=>ctx.datasetIndex === datasetIndex ? mode : undefined);
+        }
+    }
+    hide(datasetIndex, dataIndex) {
+        this._updateVisibility(datasetIndex, dataIndex, false);
+    }
+    show(datasetIndex, dataIndex) {
+        this._updateVisibility(datasetIndex, dataIndex, true);
+    }
+ _destroyDatasetMeta(datasetIndex) {
+        const meta = this._metasets[datasetIndex];
+        if (meta && meta.controller) {
+            meta.controller._destroy();
+        }
+        delete this._metasets[datasetIndex];
+    }
+    _stop() {
+        let i, ilen;
+        this.stop();
+        animator.remove(this);
+        for(i = 0, ilen = this.data.datasets.length; i < ilen; ++i){
+            this._destroyDatasetMeta(i);
+        }
+    }
+    destroy() {
+        this.notifyPlugins('beforeDestroy');
+        const { canvas , ctx  } = this;
+        this._stop();
+        this.config.clearCache();
+        if (canvas) {
+            this.unbindEvents();
+            clearCanvas(canvas, ctx);
+            this.platform.releaseContext(ctx);
+            this.canvas = null;
+            this.ctx = null;
+        }
+        delete instances[this.id];
+        this.notifyPlugins('afterDestroy');
+    }
+    toBase64Image(...args) {
+        return this.canvas.toDataURL(...args);
+    }
+ bindEvents() {
+        this.bindUserEvents();
+        if (this.options.responsive) {
+            this.bindResponsiveEvents();
+        } else {
+            this.attached = true;
+        }
+    }
+ bindUserEvents() {
+        const listeners = this._listeners;
+        const platform = this.platform;
+        const _add = (type, listener)=>{
+            platform.addEventListener(this, type, listener);
+            listeners[type] = listener;
+        };
+        const listener = (e, x, y)=>{
+            e.offsetX = x;
+            e.offsetY = y;
+            this._eventHandler(e);
+        };
+        each(this.options.events, (type)=>_add(type, listener));
+    }
+ bindResponsiveEvents() {
+        if (!this._responsiveListeners) {
+            this._responsiveListeners = {};
+        }
+        const listeners = this._responsiveListeners;
+        const platform = this.platform;
+        const _add = (type, listener)=>{
+            platform.addEventListener(this, type, listener);
+            listeners[type] = listener;
+        };
+        const _remove = (type, listener)=>{
+            if (listeners[type]) {
+                platform.removeEventListener(this, type, listener);
+                delete listeners[type];
+            }
+        };
+        const listener = (width, height)=>{
+            if (this.canvas) {
+                this.resize(width, height);
+            }
+        };
+        let detached;
+        const attached = ()=>{
+            _remove('attach', attached);
+            this.attached = true;
+            this.resize();
+            _add('resize', listener);
+            _add('detach', detached);
+        };
+        detached = ()=>{
+            this.attached = false;
+            _remove('resize', listener);
+            this._stop();
+            this._resize(0, 0);
+            _add('attach', attached);
+        };
+        if (platform.isAttached(this.canvas)) {
+            attached();
+        } else {
+            detached();
+        }
+    }
+ unbindEvents() {
+        each(this._listeners, (listener, type)=>{
+            this.platform.removeEventListener(this, type, listener);
+        });
+        this._listeners = {};
+        each(this._responsiveListeners, (listener, type)=>{
+            this.platform.removeEventListener(this, type, listener);
+        });
+        this._responsiveListeners = undefined;
+    }
+    updateHoverStyle(items, mode, enabled) {
+        const prefix = enabled ? 'set' : 'remove';
+        let meta, item, i, ilen;
+        if (mode === 'dataset') {
+            meta = this.getDatasetMeta(items[0].datasetIndex);
+            meta.controller['_' + prefix + 'DatasetHoverStyle']();
+        }
+        for(i = 0, ilen = items.length; i < ilen; ++i){
+            item = items[i];
+            const controller = item && this.getDatasetMeta(item.datasetIndex).controller;
+            if (controller) {
+                controller[prefix + 'HoverStyle'](item.element, item.datasetIndex, item.index);
+            }
+        }
+    }
+ getActiveElements() {
+        return this._active || [];
+    }
+ setActiveElements(activeElements) {
+        const lastActive = this._active || [];
+        const active = activeElements.map(({ datasetIndex , index  })=>{
+            const meta = this.getDatasetMeta(datasetIndex);
+            if (!meta) {
+                throw new Error('No dataset found at index ' + datasetIndex);
+            }
+            return {
+                datasetIndex,
+                element: meta.data[index],
+                index
+            };
+        });
+        const changed = !_elementsEqual(active, lastActive);
+        if (changed) {
+            this._active = active;
+            this._lastEvent = null;
+            this._updateHoverStyles(active, lastActive);
+        }
+    }
+ notifyPlugins(hook, args, filter) {
+        return this._plugins.notify(this, hook, args, filter);
+    }
+ isPluginEnabled(pluginId) {
+        return this._plugins._cache.filter((p)=>p.plugin.id === pluginId).length === 1;
+    }
+ _updateHoverStyles(active, lastActive, replay) {
+        const hoverOptions = this.options.hover;
+        const diff = (a, b)=>a.filter((x)=>!b.some((y)=>x.datasetIndex === y.datasetIndex && x.index === y.index));
+        const deactivated = diff(lastActive, active);
+        const activated = replay ? active : diff(active, lastActive);
+        if (deactivated.length) {
+            this.updateHoverStyle(deactivated, hoverOptions.mode, false);
+        }
+        if (activated.length && hoverOptions.mode) {
+            this.updateHoverStyle(activated, hoverOptions.mode, true);
+        }
+    }
+ _eventHandler(e, replay) {
+        const args = {
+            event: e,
+            replay,
+            cancelable: true,
+            inChartArea: this.isPointInArea(e)
+        };
+        const eventFilter = (plugin)=>(plugin.options.events || this.options.events).includes(e.native.type);
+        if (this.notifyPlugins('beforeEvent', args, eventFilter) === false) {
+            return;
+        }
+        const changed = this._handleEvent(e, replay, args.inChartArea);
+        args.cancelable = false;
+        this.notifyPlugins('afterEvent', args, eventFilter);
+        if (changed || args.changed) {
+            this.render();
+        }
+        return this;
+    }
+ _handleEvent(e, replay, inChartArea) {
+        const { _active: lastActive = [] , options  } = this;
+        const useFinalPosition = replay;
+        const active = this._getActiveElements(e, lastActive, inChartArea, useFinalPosition);
+        const isClick = _isClickEvent(e);
+        const lastEvent = determineLastEvent(e, this._lastEvent, inChartArea, isClick);
+        if (inChartArea) {
+            this._lastEvent = null;
+            callback(options.onHover, [
+                e,
+                active,
+                this
+            ], this);
+            if (isClick) {
+                callback(options.onClick, [
+                    e,
+                    active,
+                    this
+                ], this);
+            }
+        }
+        const changed = !_elementsEqual(active, lastActive);
+        if (changed || replay) {
+            this._active = active;
+            this._updateHoverStyles(active, lastActive, replay);
+        }
+        this._lastEvent = lastEvent;
+        return changed;
+    }
+ _getActiveElements(e, lastActive, inChartArea, useFinalPosition) {
+        if (e.type === 'mouseout') {
+            return [];
+        }
+        if (!inChartArea) {
+            return lastActive;
+        }
+        const hoverOptions = this.options.hover;
+        return this.getElementsAtEventForMode(e, hoverOptions.mode, hoverOptions, useFinalPosition);
+    }
+}
+function invalidatePlugins() {
+    return each(Chart.instances, (chart)=>chart._plugins.invalidate());
+}
+
+function clipSelf(ctx, element, endAngle) {
+    const { startAngle , x , y , outerRadius , innerRadius , options  } = element;
+    const { borderWidth , borderJoinStyle  } = options;
+    const outerAngleClip = Math.min(borderWidth / outerRadius, _normalizeAngle(startAngle - endAngle));
+    ctx.beginPath();
+    ctx.arc(x, y, outerRadius - borderWidth / 2, startAngle + outerAngleClip / 2, endAngle - outerAngleClip / 2);
+    if (innerRadius > 0) {
+        const innerAngleClip = Math.min(borderWidth / innerRadius, _normalizeAngle(startAngle - endAngle));
+        ctx.arc(x, y, innerRadius + borderWidth / 2, endAngle - innerAngleClip / 2, startAngle + innerAngleClip / 2, true);
+    } else {
+        const clipWidth = Math.min(borderWidth / 2, outerRadius * _normalizeAngle(startAngle - endAngle));
+        if (borderJoinStyle === 'round') {
+            ctx.arc(x, y, clipWidth, endAngle - PI / 2, startAngle + PI / 2, true);
+        } else if (borderJoinStyle === 'bevel') {
+            const r = 2 * clipWidth * clipWidth;
+            const endX = -r * Math.cos(endAngle + PI / 2) + x;
+            const endY = -r * Math.sin(endAngle + PI / 2) + y;
+            const startX = r * Math.cos(startAngle + PI / 2) + x;
+            const startY = r * Math.sin(startAngle + PI / 2) + y;
+            ctx.lineTo(endX, endY);
+            ctx.lineTo(startX, startY);
+        }
+    }
+    ctx.closePath();
+    ctx.moveTo(0, 0);
+    ctx.rect(0, 0, ctx.canvas.width, ctx.canvas.height);
+    ctx.clip('evenodd');
+}
+function clipArc(ctx, element, endAngle) {
+    const { startAngle , pixelMargin , x , y , outerRadius , innerRadius  } = element;
+    let angleMargin = pixelMargin / outerRadius;
+    // Draw an inner border by clipping the arc and drawing a double-width border
+    // Enlarge the clipping arc by 0.33 pixels to eliminate glitches between borders
+    ctx.beginPath();
+    ctx.arc(x, y, outerRadius, startAngle - angleMargin, endAngle + angleMargin);
+    if (innerRadius > pixelMargin) {
+        angleMargin = pixelMargin / innerRadius;
+        ctx.arc(x, y, innerRadius, endAngle + angleMargin, startAngle - angleMargin, true);
+    } else {
+        ctx.arc(x, y, pixelMargin, endAngle + HALF_PI, startAngle - HALF_PI);
+    }
+    ctx.closePath();
+    ctx.clip();
+}
+function toRadiusCorners(value) {
+    return _readValueToProps(value, [
+        'outerStart',
+        'outerEnd',
+        'innerStart',
+        'innerEnd'
+    ]);
+}
+/**
+ * Parse border radius from the provided options
+ */ function parseBorderRadius$1(arc, innerRadius, outerRadius, angleDelta) {
+    const o = toRadiusCorners(arc.options.borderRadius);
+    const halfThickness = (outerRadius - innerRadius) / 2;
+    const innerLimit = Math.min(halfThickness, angleDelta * innerRadius / 2);
+    // Outer limits are complicated. We want to compute the available angular distance at
+    // a radius of outerRadius - borderRadius because for small angular distances, this term limits.
+    // We compute at r = outerRadius - borderRadius because this circle defines the center of the border corners.
+    //
+    // If the borderRadius is large, that value can become negative.
+    // This causes the outer borders to lose their radius entirely, which is rather unexpected. To solve that, if borderRadius > outerRadius
+    // we know that the thickness term will dominate and compute the limits at that point
+    const computeOuterLimit = (val)=>{
+        const outerArcLimit = (outerRadius - Math.min(halfThickness, val)) * angleDelta / 2;
+        return _limitValue(val, 0, Math.min(halfThickness, outerArcLimit));
+    };
+    return {
+        outerStart: computeOuterLimit(o.outerStart),
+        outerEnd: computeOuterLimit(o.outerEnd),
+        innerStart: _limitValue(o.innerStart, 0, innerLimit),
+        innerEnd: _limitValue(o.innerEnd, 0, innerLimit)
+    };
+}
+/**
+ * Convert (r, 𝜃) to (x, y)
+ */ function rThetaToXY(r, theta, x, y) {
+    return {
+        x: x + r * Math.cos(theta),
+        y: y + r * Math.sin(theta)
+    };
+}
+/**
+ * Path the arc, respecting border radius by separating into left and right halves.
+ *
+ *   Start      End
+ *
+ *    1--->a--->2    Outer
+ *   /           \
+ *   8           3
+ *   |           |
+ *   |           |
+ *   7           4
+ *   \           /
+ *    6<---b<---5    Inner
+ */ function pathArc(ctx, element, offset, spacing, end, circular) {
+    const { x , y , startAngle: start , pixelMargin , innerRadius: innerR  } = element;
+    const outerRadius = Math.max(element.outerRadius + spacing + offset - pixelMargin, 0);
+    const innerRadius = innerR > 0 ? innerR + spacing + offset + pixelMargin : 0;
+    let spacingOffset = 0;
+    const alpha = end - start;
+    if (spacing) {
+        // When spacing is present, it is the same for all items
+        // So we adjust the start and end angle of the arc such that
+        // the distance is the same as it would be without the spacing
+        const noSpacingInnerRadius = innerR > 0 ? innerR - spacing : 0;
+        const noSpacingOuterRadius = outerRadius > 0 ? outerRadius - spacing : 0;
+        const avNogSpacingRadius = (noSpacingInnerRadius + noSpacingOuterRadius) / 2;
+        const adjustedAngle = avNogSpacingRadius !== 0 ? alpha * avNogSpacingRadius / (avNogSpacingRadius + spacing) : alpha;
+        spacingOffset = (alpha - adjustedAngle) / 2;
+    }
+    const beta = Math.max(0.001, alpha * outerRadius - offset / PI) / outerRadius;
+    const angleOffset = (alpha - beta) / 2;
+    const startAngle = start + angleOffset + spacingOffset;
+    const endAngle = end - angleOffset - spacingOffset;
+    const { outerStart , outerEnd , innerStart , innerEnd  } = parseBorderRadius$1(element, innerRadius, outerRadius, endAngle - startAngle);
+    const outerStartAdjustedRadius = outerRadius - outerStart;
+    const outerEndAdjustedRadius = outerRadius - outerEnd;
+    const outerStartAdjustedAngle = startAngle + outerStart / outerStartAdjustedRadius;
+    const outerEndAdjustedAngle = endAngle - outerEnd / outerEndAdjustedRadius;
+    const innerStartAdjustedRadius = innerRadius + innerStart;
+    const innerEndAdjustedRadius = innerRadius + innerEnd;
+    const innerStartAdjustedAngle = startAngle + innerStart / innerStartAdjustedRadius;
+    const innerEndAdjustedAngle = endAngle - innerEnd / innerEndAdjustedRadius;
+    ctx.beginPath();
+    if (circular) {
+        // The first arc segments from point 1 to point a to point 2
+        const outerMidAdjustedAngle = (outerStartAdjustedAngle + outerEndAdjustedAngle) / 2;
+        ctx.arc(x, y, outerRadius, outerStartAdjustedAngle, outerMidAdjustedAngle);
+        ctx.arc(x, y, outerRadius, outerMidAdjustedAngle, outerEndAdjustedAngle);
+        // The corner segment from point 2 to point 3
+        if (outerEnd > 0) {
+            const pCenter = rThetaToXY(outerEndAdjustedRadius, outerEndAdjustedAngle, x, y);
+            ctx.arc(pCenter.x, pCenter.y, outerEnd, outerEndAdjustedAngle, endAngle + HALF_PI);
+        }
+        // The line from point 3 to point 4
+        const p4 = rThetaToXY(innerEndAdjustedRadius, endAngle, x, y);
+        ctx.lineTo(p4.x, p4.y);
+        // The corner segment from point 4 to point 5
+        if (innerEnd > 0) {
+            const pCenter = rThetaToXY(innerEndAdjustedRadius, innerEndAdjustedAngle, x, y);
+            ctx.arc(pCenter.x, pCenter.y, innerEnd, endAngle + HALF_PI, innerEndAdjustedAngle + Math.PI);
+        }
+        // The inner arc from point 5 to point b to point 6
+        const innerMidAdjustedAngle = (endAngle - innerEnd / innerRadius + (startAngle + innerStart / innerRadius)) / 2;
+        ctx.arc(x, y, innerRadius, endAngle - innerEnd / innerRadius, innerMidAdjustedAngle, true);
+        ctx.arc(x, y, innerRadius, innerMidAdjustedAngle, startAngle + innerStart / innerRadius, true);
+        // The corner segment from point 6 to point 7
+        if (innerStart > 0) {
+            const pCenter = rThetaToXY(innerStartAdjustedRadius, innerStartAdjustedAngle, x, y);
+            ctx.arc(pCenter.x, pCenter.y, innerStart, innerStartAdjustedAngle + Math.PI, startAngle - HALF_PI);
+        }
+        // The line from point 7 to point 8
+        const p8 = rThetaToXY(outerStartAdjustedRadius, startAngle, x, y);
+        ctx.lineTo(p8.x, p8.y);
+        // The corner segment from point 8 to point 1
+        if (outerStart > 0) {
+            const pCenter = rThetaToXY(outerStartAdjustedRadius, outerStartAdjustedAngle, x, y);
+            ctx.arc(pCenter.x, pCenter.y, outerStart, startAngle - HALF_PI, outerStartAdjustedAngle);
+        }
+    } else {
+        ctx.moveTo(x, y);
+        const outerStartX = Math.cos(outerStartAdjustedAngle) * outerRadius + x;
+        const outerStartY = Math.sin(outerStartAdjustedAngle) * outerRadius + y;
+        ctx.lineTo(outerStartX, outerStartY);
+        const outerEndX = Math.cos(outerEndAdjustedAngle) * outerRadius + x;
+        const outerEndY = Math.sin(outerEndAdjustedAngle) * outerRadius + y;
+        ctx.lineTo(outerEndX, outerEndY);
+    }
+    ctx.closePath();
+}
+function drawArc(ctx, element, offset, spacing, circular) {
+    const { fullCircles , startAngle , circumference  } = element;
+    let endAngle = element.endAngle;
+    if (fullCircles) {
+        pathArc(ctx, element, offset, spacing, endAngle, circular);
+        for(let i = 0; i < fullCircles; ++i){
+            ctx.fill();
+        }
+        if (!isNaN(circumference)) {
+            endAngle = startAngle + (circumference % TAU || TAU);
+        }
+    }
+    pathArc(ctx, element, offset, spacing, endAngle, circular);
+    ctx.fill();
+    return endAngle;
+}
+function drawBorder(ctx, element, offset, spacing, circular) {
+    const { fullCircles , startAngle , circumference , options  } = element;
+    const { borderWidth , borderJoinStyle , borderDash , borderDashOffset , borderRadius  } = options;
+    const inner = options.borderAlign === 'inner';
+    if (!borderWidth) {
+        return;
+    }
+    ctx.setLineDash(borderDash || []);
+    ctx.lineDashOffset = borderDashOffset;
+    if (inner) {
+        ctx.lineWidth = borderWidth * 2;
+        ctx.lineJoin = borderJoinStyle || 'round';
+    } else {
+        ctx.lineWidth = borderWidth;
+        ctx.lineJoin = borderJoinStyle || 'bevel';
+    }
+    let endAngle = element.endAngle;
+    if (fullCircles) {
+        pathArc(ctx, element, offset, spacing, endAngle, circular);
+        for(let i = 0; i < fullCircles; ++i){
+            ctx.stroke();
+        }
+        if (!isNaN(circumference)) {
+            endAngle = startAngle + (circumference % TAU || TAU);
+        }
+    }
+    if (inner) {
+        clipArc(ctx, element, endAngle);
+    }
+    if (options.selfJoin && endAngle - startAngle >= PI && borderRadius === 0 && borderJoinStyle !== 'miter') {
+        clipSelf(ctx, element, endAngle);
+    }
+    if (!fullCircles) {
+        pathArc(ctx, element, offset, spacing, endAngle, circular);
+        ctx.stroke();
+    }
+}
+class ArcElement extends Element {
+    static id = 'arc';
+    static defaults = {
+        borderAlign: 'center',
+        borderColor: '#fff',
+        borderDash: [],
+        borderDashOffset: 0,
+        borderJoinStyle: undefined,
+        borderRadius: 0,
+        borderWidth: 2,
+        offset: 0,
+        spacing: 0,
+        angle: undefined,
+        circular: true,
+        selfJoin: false
+    };
+    static defaultRoutes = {
+        backgroundColor: 'backgroundColor'
+    };
+    static descriptors = {
+        _scriptable: true,
+        _indexable: (name)=>name !== 'borderDash'
+    };
+    circumference;
+    endAngle;
+    fullCircles;
+    innerRadius;
+    outerRadius;
+    pixelMargin;
+    startAngle;
+    constructor(cfg){
+        super();
+        this.options = undefined;
+        this.circumference = undefined;
+        this.startAngle = undefined;
+        this.endAngle = undefined;
+        this.innerRadius = undefined;
+        this.outerRadius = undefined;
+        this.pixelMargin = 0;
+        this.fullCircles = 0;
+        if (cfg) {
+            Object.assign(this, cfg);
+        }
+    }
+    inRange(chartX, chartY, useFinalPosition) {
+        const point = this.getProps([
+            'x',
+            'y'
+        ], useFinalPosition);
+        const { angle , distance  } = getAngleFromPoint(point, {
+            x: chartX,
+            y: chartY
+        });
+        const { startAngle , endAngle , innerRadius , outerRadius , circumference  } = this.getProps([
+            'startAngle',
+            'endAngle',
+            'innerRadius',
+            'outerRadius',
+            'circumference'
+        ], useFinalPosition);
+        const rAdjust = (this.options.spacing + this.options.borderWidth) / 2;
+        const _circumference = valueOrDefault(circumference, endAngle - startAngle);
+        const nonZeroBetween = _angleBetween(angle, startAngle, endAngle) && startAngle !== endAngle;
+        const betweenAngles = _circumference >= TAU || nonZeroBetween;
+        const withinRadius = _isBetween(distance, innerRadius + rAdjust, outerRadius + rAdjust);
+        return betweenAngles && withinRadius;
+    }
+    getCenterPoint(useFinalPosition) {
+        const { x , y , startAngle , endAngle , innerRadius , outerRadius  } = this.getProps([
+            'x',
+            'y',
+            'startAngle',
+            'endAngle',
+            'innerRadius',
+            'outerRadius'
+        ], useFinalPosition);
+        const { offset , spacing  } = this.options;
+        const halfAngle = (startAngle + endAngle) / 2;
+        const halfRadius = (innerRadius + outerRadius + spacing + offset) / 2;
+        return {
+            x: x + Math.cos(halfAngle) * halfRadius,
+            y: y + Math.sin(halfAngle) * halfRadius
+        };
+    }
+    tooltipPosition(useFinalPosition) {
+        return this.getCenterPoint(useFinalPosition);
+    }
+    draw(ctx) {
+        const { options , circumference  } = this;
+        const offset = (options.offset || 0) / 4;
+        const spacing = (options.spacing || 0) / 2;
+        const circular = options.circular;
+        this.pixelMargin = options.borderAlign === 'inner' ? 0.33 : 0;
+        this.fullCircles = circumference > TAU ? Math.floor(circumference / TAU) : 0;
+        if (circumference === 0 || this.innerRadius < 0 || this.outerRadius < 0) {
+            return;
+        }
+        ctx.save();
+        const halfAngle = (this.startAngle + this.endAngle) / 2;
+        ctx.translate(Math.cos(halfAngle) * offset, Math.sin(halfAngle) * offset);
+        const fix = 1 - Math.sin(Math.min(PI, circumference || 0));
+        const radiusOffset = offset * fix;
+        ctx.fillStyle = options.backgroundColor;
+        ctx.strokeStyle = options.borderColor;
+        drawArc(ctx, this, radiusOffset, spacing, circular);
+        drawBorder(ctx, this, radiusOffset, spacing, circular);
+        ctx.restore();
+    }
+}
+
+function setStyle(ctx, options, style = options) {
+    ctx.lineCap = valueOrDefault(style.borderCapStyle, options.borderCapStyle);
+    ctx.setLineDash(valueOrDefault(style.borderDash, options.borderDash));
+    ctx.lineDashOffset = valueOrDefault(style.borderDashOffset, options.borderDashOffset);
+    ctx.lineJoin = valueOrDefault(style.borderJoinStyle, options.borderJoinStyle);
+    ctx.lineWidth = valueOrDefault(style.borderWidth, options.borderWidth);
+    ctx.strokeStyle = valueOrDefault(style.borderColor, options.borderColor);
+}
+function lineTo(ctx, previous, target) {
+    ctx.lineTo(target.x, target.y);
+}
+ function getLineMethod(options) {
+    if (options.stepped) {
+        return _steppedLineTo;
+    }
+    if (options.tension || options.cubicInterpolationMode === 'monotone') {
+        return _bezierCurveTo;
+    }
+    return lineTo;
+}
+function pathVars(points, segment, params = {}) {
+    const count = points.length;
+    const { start: paramsStart = 0 , end: paramsEnd = count - 1  } = params;
+    const { start: segmentStart , end: segmentEnd  } = segment;
+    const start = Math.max(paramsStart, segmentStart);
+    const end = Math.min(paramsEnd, segmentEnd);
+    const outside = paramsStart < segmentStart && paramsEnd < segmentStart || paramsStart > segmentEnd && paramsEnd > segmentEnd;
+    return {
+        count,
+        start,
+        loop: segment.loop,
+        ilen: end < start && !outside ? count + end - start : end - start
+    };
+}
+ function pathSegment(ctx, line, segment, params) {
+    const { points , options  } = line;
+    const { count , start , loop , ilen  } = pathVars(points, segment, params);
+    const lineMethod = getLineMethod(options);
+    let { move =true , reverse  } = params || {};
+    let i, point, prev;
+    for(i = 0; i <= ilen; ++i){
+        point = points[(start + (reverse ? ilen - i : i)) % count];
+        if (point.skip) {
+            continue;
+        } else if (move) {
+            ctx.moveTo(point.x, point.y);
+            move = false;
+        } else {
+            lineMethod(ctx, prev, point, reverse, options.stepped);
+        }
+        prev = point;
+    }
+    if (loop) {
+        point = points[(start + (reverse ? ilen : 0)) % count];
+        lineMethod(ctx, prev, point, reverse, options.stepped);
+    }
+    return !!loop;
+}
+ function fastPathSegment(ctx, line, segment, params) {
+    const points = line.points;
+    const { count , start , ilen  } = pathVars(points, segment, params);
+    const { move =true , reverse  } = params || {};
+    let avgX = 0;
+    let countX = 0;
+    let i, point, prevX, minY, maxY, lastY;
+    const pointIndex = (index)=>(start + (reverse ? ilen - index : index)) % count;
+    const drawX = ()=>{
+        if (minY !== maxY) {
+            ctx.lineTo(avgX, maxY);
+            ctx.lineTo(avgX, minY);
+            ctx.lineTo(avgX, lastY);
+        }
+    };
+    if (move) {
+        point = points[pointIndex(0)];
+        ctx.moveTo(point.x, point.y);
+    }
+    for(i = 0; i <= ilen; ++i){
+        point = points[pointIndex(i)];
+        if (point.skip) {
+            continue;
+        }
+        const x = point.x;
+        const y = point.y;
+        const truncX = x | 0;
+        if (truncX === prevX) {
+            if (y < minY) {
+                minY = y;
+            } else if (y > maxY) {
+                maxY = y;
+            }
+            avgX = (countX * avgX + x) / ++countX;
+        } else {
+            drawX();
+            ctx.lineTo(x, y);
+            prevX = truncX;
+            countX = 0;
+            minY = maxY = y;
+        }
+        lastY = y;
+    }
+    drawX();
+}
+ function _getSegmentMethod(line) {
+    const opts = line.options;
+    const borderDash = opts.borderDash && opts.borderDash.length;
+    const useFastPath = !line._decimated && !line._loop && !opts.tension && opts.cubicInterpolationMode !== 'monotone' && !opts.stepped && !borderDash;
+    return useFastPath ? fastPathSegment : pathSegment;
+}
+ function _getInterpolationMethod(options) {
+    if (options.stepped) {
+        return _steppedInterpolation;
+    }
+    if (options.tension || options.cubicInterpolationMode === 'monotone') {
+        return _bezierInterpolation;
+    }
+    return _pointInLine;
+}
+function strokePathWithCache(ctx, line, start, count) {
+    let path = line._path;
+    if (!path) {
+        path = line._path = new Path2D();
+        if (line.path(path, start, count)) {
+            path.closePath();
+        }
+    }
+    setStyle(ctx, line.options);
+    ctx.stroke(path);
+}
+function strokePathDirect(ctx, line, start, count) {
+    const { segments , options  } = line;
+    const segmentMethod = _getSegmentMethod(line);
+    for (const segment of segments){
+        setStyle(ctx, options, segment.style);
+        ctx.beginPath();
+        if (segmentMethod(ctx, line, segment, {
+            start,
+            end: start + count - 1
+        })) {
+            ctx.closePath();
+        }
+        ctx.stroke();
+    }
+}
+const usePath2D = typeof Path2D === 'function';
+function draw(ctx, line, start, count) {
+    if (usePath2D && !line.options.segment) {
+        strokePathWithCache(ctx, line, start, count);
+    } else {
+        strokePathDirect(ctx, line, start, count);
+    }
+}
+class LineElement extends Element {
+    static id = 'line';
+ static defaults = {
+        borderCapStyle: 'butt',
+        borderDash: [],
+        borderDashOffset: 0,
+        borderJoinStyle: 'miter',
+        borderWidth: 3,
+        capBezierPoints: true,
+        cubicInterpolationMode: 'default',
+        fill: false,
+        spanGaps: false,
+        stepped: false,
+        tension: 0
+    };
+ static defaultRoutes = {
+        backgroundColor: 'backgroundColor',
+        borderColor: 'borderColor'
+    };
+    static descriptors = {
+        _scriptable: true,
+        _indexable: (name)=>name !== 'borderDash' && name !== 'fill'
+    };
+    constructor(cfg){
+        super();
+        this.animated = true;
+        this.options = undefined;
+        this._chart = undefined;
+        this._loop = undefined;
+        this._fullLoop = undefined;
+        this._path = undefined;
+        this._points = undefined;
+        this._segments = undefined;
+        this._decimated = false;
+        this._pointsUpdated = false;
+        this._datasetIndex = undefined;
+        if (cfg) {
+            Object.assign(this, cfg);
+        }
+    }
+    updateControlPoints(chartArea, indexAxis) {
+        const options = this.options;
+        if ((options.tension || options.cubicInterpolationMode === 'monotone') && !options.stepped && !this._pointsUpdated) {
+            const loop = options.spanGaps ? this._loop : this._fullLoop;
+            _updateBezierControlPoints(this._points, options, chartArea, loop, indexAxis);
+            this._pointsUpdated = true;
+        }
+    }
+    set points(points) {
+        this._points = points;
+        delete this._segments;
+        delete this._path;
+        this._pointsUpdated = false;
+    }
+    get points() {
+        return this._points;
+    }
+    get segments() {
+        return this._segments || (this._segments = _computeSegments(this, this.options.segment));
+    }
+ first() {
+        const segments = this.segments;
+        const points = this.points;
+        return segments.length && points[segments[0].start];
+    }
+ last() {
+        const segments = this.segments;
+        const points = this.points;
+        const count = segments.length;
+        return count && points[segments[count - 1].end];
+    }
+ interpolate(point, property) {
+        const options = this.options;
+        const value = point[property];
+        const points = this.points;
+        const segments = _boundSegments(this, {
+            property,
+            start: value,
+            end: value
+        });
+        if (!segments.length) {
+            return;
+        }
+        const result = [];
+        const _interpolate = _getInterpolationMethod(options);
+        let i, ilen;
+        for(i = 0, ilen = segments.length; i < ilen; ++i){
+            const { start , end  } = segments[i];
+            const p1 = points[start];
+            const p2 = points[end];
+            if (p1 === p2) {
+                result.push(p1);
+                continue;
+            }
+            const t = Math.abs((value - p1[property]) / (p2[property] - p1[property]));
+            const interpolated = _interpolate(p1, p2, t, options.stepped);
+            interpolated[property] = point[property];
+            result.push(interpolated);
+        }
+        return result.length === 1 ? result[0] : result;
+    }
+ pathSegment(ctx, segment, params) {
+        const segmentMethod = _getSegmentMethod(this);
+        return segmentMethod(ctx, this, segment, params);
+    }
+ path(ctx, start, count) {
+        const segments = this.segments;
+        const segmentMethod = _getSegmentMethod(this);
+        let loop = this._loop;
+        start = start || 0;
+        count = count || this.points.length - start;
+        for (const segment of segments){
+            loop &= segmentMethod(ctx, this, segment, {
+                start,
+                end: start + count - 1
+            });
+        }
+        return !!loop;
+    }
+ draw(ctx, chartArea, start, count) {
+        const options = this.options || {};
+        const points = this.points || [];
+        if (points.length && options.borderWidth) {
+            ctx.save();
+            draw(ctx, this, start, count);
+            ctx.restore();
+        }
+        if (this.animated) {
+            this._pointsUpdated = false;
+            this._path = undefined;
+        }
+    }
+}
+
+function inRange$1(el, pos, axis, useFinalPosition) {
+    const options = el.options;
+    const { [axis]: value  } = el.getProps([
+        axis
+    ], useFinalPosition);
+    return Math.abs(pos - value) < options.radius + options.hitRadius;
+}
+class PointElement extends Element {
+    static id = 'point';
+    parsed;
+    skip;
+    stop;
+    /**
+   * @type {any}
+   */ static defaults = {
+        borderWidth: 1,
+        hitRadius: 1,
+        hoverBorderWidth: 1,
+        hoverRadius: 4,
+        pointStyle: 'circle',
+        radius: 3,
+        rotation: 0
+    };
+    /**
+   * @type {any}
+   */ static defaultRoutes = {
+        backgroundColor: 'backgroundColor',
+        borderColor: 'borderColor'
+    };
+    constructor(cfg){
+        super();
+        this.options = undefined;
+        this.parsed = undefined;
+        this.skip = undefined;
+        this.stop = undefined;
+        if (cfg) {
+            Object.assign(this, cfg);
+        }
+    }
+    inRange(mouseX, mouseY, useFinalPosition) {
+        const options = this.options;
+        const { x , y  } = this.getProps([
+            'x',
+            'y'
+        ], useFinalPosition);
+        return Math.pow(mouseX - x, 2) + Math.pow(mouseY - y, 2) < Math.pow(options.hitRadius + options.radius, 2);
+    }
+    inXRange(mouseX, useFinalPosition) {
+        return inRange$1(this, mouseX, 'x', useFinalPosition);
+    }
+    inYRange(mouseY, useFinalPosition) {
+        return inRange$1(this, mouseY, 'y', useFinalPosition);
+    }
+    getCenterPoint(useFinalPosition) {
+        const { x , y  } = this.getProps([
+            'x',
+            'y'
+        ], useFinalPosition);
+        return {
+            x,
+            y
+        };
+    }
+    size(options) {
+        options = options || this.options || {};
+        let radius = options.radius || 0;
+        radius = Math.max(radius, radius && options.hoverRadius || 0);
+        const borderWidth = radius && options.borderWidth || 0;
+        return (radius + borderWidth) * 2;
+    }
+    draw(ctx, area) {
+        const options = this.options;
+        if (this.skip || options.radius < 0.1 || !_isPointInArea(this, area, this.size(options) / 2)) {
+            return;
+        }
+        ctx.strokeStyle = options.borderColor;
+        ctx.lineWidth = options.borderWidth;
+        ctx.fillStyle = options.backgroundColor;
+        drawPoint(ctx, options, this.x, this.y);
+    }
+    getRange() {
+        const options = this.options || {};
+        // @ts-expect-error Fallbacks should never be hit in practice
+        return options.radius + options.hitRadius;
+    }
+}
+
+function getBarBounds(bar, useFinalPosition) {
+    const { x , y , base , width , height  } =  bar.getProps([
+        'x',
+        'y',
+        'base',
+        'width',
+        'height'
+    ], useFinalPosition);
+    let left, right, top, bottom, half;
+    if (bar.horizontal) {
+        half = height / 2;
+        left = Math.min(x, base);
+        right = Math.max(x, base);
+        top = y - half;
+        bottom = y + half;
+    } else {
+        half = width / 2;
+        left = x - half;
+        right = x + half;
+        top = Math.min(y, base);
+        bottom = Math.max(y, base);
+    }
+    return {
+        left,
+        top,
+        right,
+        bottom
+    };
+}
+function skipOrLimit(skip, value, min, max) {
+    return skip ? 0 : _limitValue(value, min, max);
+}
+function parseBorderWidth(bar, maxW, maxH) {
+    const value = bar.options.borderWidth;
+    const skip = bar.borderSkipped;
+    const o = toTRBL(value);
+    return {
+        t: skipOrLimit(skip.top, o.top, 0, maxH),
+        r: skipOrLimit(skip.right, o.right, 0, maxW),
+        b: skipOrLimit(skip.bottom, o.bottom, 0, maxH),
+        l: skipOrLimit(skip.left, o.left, 0, maxW)
+    };
+}
+function parseBorderRadius(bar, maxW, maxH) {
+    const { enableBorderRadius  } = bar.getProps([
+        'enableBorderRadius'
+    ]);
+    const value = bar.options.borderRadius;
+    const o = toTRBLCorners(value);
+    const maxR = Math.min(maxW, maxH);
+    const skip = bar.borderSkipped;
+    const enableBorder = enableBorderRadius || isObject(value);
+    return {
+        topLeft: skipOrLimit(!enableBorder || skip.top || skip.left, o.topLeft, 0, maxR),
+        topRight: skipOrLimit(!enableBorder || skip.top || skip.right, o.topRight, 0, maxR),
+        bottomLeft: skipOrLimit(!enableBorder || skip.bottom || skip.left, o.bottomLeft, 0, maxR),
+        bottomRight: skipOrLimit(!enableBorder || skip.bottom || skip.right, o.bottomRight, 0, maxR)
+    };
+}
+function boundingRects(bar) {
+    const bounds = getBarBounds(bar);
+    const width = bounds.right - bounds.left;
+    const height = bounds.bottom - bounds.top;
+    const border = parseBorderWidth(bar, width / 2, height / 2);
+    const radius = parseBorderRadius(bar, width / 2, height / 2);
+    return {
+        outer: {
+            x: bounds.left,
+            y: bounds.top,
+            w: width,
+            h: height,
+            radius
+        },
+        inner: {
+            x: bounds.left + border.l,
+            y: bounds.top + border.t,
+            w: width - border.l - border.r,
+            h: height - border.t - border.b,
+            radius: {
+                topLeft: Math.max(0, radius.topLeft - Math.max(border.t, border.l)),
+                topRight: Math.max(0, radius.topRight - Math.max(border.t, border.r)),
+                bottomLeft: Math.max(0, radius.bottomLeft - Math.max(border.b, border.l)),
+                bottomRight: Math.max(0, radius.bottomRight - Math.max(border.b, border.r))
+            }
+        }
+    };
+}
+function inRange(bar, x, y, useFinalPosition) {
+    const skipX = x === null;
+    const skipY = y === null;
+    const skipBoth = skipX && skipY;
+    const bounds = bar && !skipBoth && getBarBounds(bar, useFinalPosition);
+    return bounds && (skipX || _isBetween(x, bounds.left, bounds.right)) && (skipY || _isBetween(y, bounds.top, bounds.bottom));
+}
+function hasRadius(radius) {
+    return radius.topLeft || radius.topRight || radius.bottomLeft || radius.bottomRight;
+}
+ function addNormalRectPath(ctx, rect) {
+    ctx.rect(rect.x, rect.y, rect.w, rect.h);
+}
+function inflateRect(rect, amount, refRect = {}) {
+    const x = rect.x !== refRect.x ? -amount : 0;
+    const y = rect.y !== refRect.y ? -amount : 0;
+    const w = (rect.x + rect.w !== refRect.x + refRect.w ? amount : 0) - x;
+    const h = (rect.y + rect.h !== refRect.y + refRect.h ? amount : 0) - y;
+    return {
+        x: rect.x + x,
+        y: rect.y + y,
+        w: rect.w + w,
+        h: rect.h + h,
+        radius: rect.radius
+    };
+}
+class BarElement extends Element {
+    static id = 'bar';
+ static defaults = {
+        borderSkipped: 'start',
+        borderWidth: 0,
+        borderRadius: 0,
+        inflateAmount: 'auto',
+        pointStyle: undefined
+    };
+ static defaultRoutes = {
+        backgroundColor: 'backgroundColor',
+        borderColor: 'borderColor'
+    };
+    constructor(cfg){
+        super();
+        this.options = undefined;
+        this.horizontal = undefined;
+        this.base = undefined;
+        this.width = undefined;
+        this.height = undefined;
+        this.inflateAmount = undefined;
+        if (cfg) {
+            Object.assign(this, cfg);
+        }
+    }
+    draw(ctx) {
+        const { inflateAmount , options: { borderColor , backgroundColor  }  } = this;
+        const { inner , outer  } = boundingRects(this);
+        const addRectPath = hasRadius(outer.radius) ? addRoundedRectPath : addNormalRectPath;
+        ctx.save();
+        if (outer.w !== inner.w || outer.h !== inner.h) {
+            ctx.beginPath();
+            addRectPath(ctx, inflateRect(outer, inflateAmount, inner));
+            ctx.clip();
+            addRectPath(ctx, inflateRect(inner, -inflateAmount, outer));
+            ctx.fillStyle = borderColor;
+            ctx.fill('evenodd');
+        }
+        ctx.beginPath();
+        addRectPath(ctx, inflateRect(inner, inflateAmount));
+        ctx.fillStyle = backgroundColor;
+        ctx.fill();
+        ctx.restore();
+    }
+    inRange(mouseX, mouseY, useFinalPosition) {
+        return inRange(this, mouseX, mouseY, useFinalPosition);
+    }
+    inXRange(mouseX, useFinalPosition) {
+        return inRange(this, mouseX, null, useFinalPosition);
+    }
+    inYRange(mouseY, useFinalPosition) {
+        return inRange(this, null, mouseY, useFinalPosition);
+    }
+    getCenterPoint(useFinalPosition) {
+        const { x , y , base , horizontal  } =  this.getProps([
+            'x',
+            'y',
+            'base',
+            'horizontal'
+        ], useFinalPosition);
+        return {
+            x: horizontal ? (x + base) / 2 : x,
+            y: horizontal ? y : (y + base) / 2
+        };
+    }
+    getRange(axis) {
+        return axis === 'x' ? this.width / 2 : this.height / 2;
+    }
+}
+
+var elements = /*#__PURE__*/Object.freeze({
+__proto__: null,
+ArcElement: ArcElement,
+BarElement: BarElement,
+LineElement: LineElement,
+PointElement: PointElement
+});
+
+const BORDER_COLORS = [
+    'rgb(54, 162, 235)',
+    'rgb(255, 99, 132)',
+    'rgb(255, 159, 64)',
+    'rgb(255, 205, 86)',
+    'rgb(75, 192, 192)',
+    'rgb(153, 102, 255)',
+    'rgb(201, 203, 207)' // grey
+];
+// Border colors with 50% transparency
+const BACKGROUND_COLORS = /* #__PURE__ */ BORDER_COLORS.map((color)=>color.replace('rgb(', 'rgba(').replace(')', ', 0.5)'));
+function getBorderColor(i) {
+    return BORDER_COLORS[i % BORDER_COLORS.length];
+}
+function getBackgroundColor(i) {
+    return BACKGROUND_COLORS[i % BACKGROUND_COLORS.length];
+}
+function colorizeDefaultDataset(dataset, i) {
+    dataset.borderColor = getBorderColor(i);
+    dataset.backgroundColor = getBackgroundColor(i);
+    return ++i;
+}
+function colorizeDoughnutDataset(dataset, i) {
+    dataset.backgroundColor = dataset.data.map(()=>getBorderColor(i++));
+    return i;
+}
+function colorizePolarAreaDataset(dataset, i) {
+    dataset.backgroundColor = dataset.data.map(()=>getBackgroundColor(i++));
+    return i;
+}
+function getColorizer(chart) {
+    let i = 0;
+    return (dataset, datasetIndex)=>{
+        const controller = chart.getDatasetMeta(datasetIndex).controller;
+        if (controller instanceof DoughnutController) {
+            i = colorizeDoughnutDataset(dataset, i);
+        } else if (controller instanceof PolarAreaController) {
+            i = colorizePolarAreaDataset(dataset, i);
+        } else if (controller) {
+            i = colorizeDefaultDataset(dataset, i);
+        }
+    };
+}
+function containsColorsDefinitions(descriptors) {
+    let k;
+    for(k in descriptors){
+        if (descriptors[k].borderColor || descriptors[k].backgroundColor) {
+            return true;
+        }
+    }
+    return false;
+}
+function containsColorsDefinition(descriptor) {
+    return descriptor && (descriptor.borderColor || descriptor.backgroundColor);
+}
+function containsDefaultColorsDefenitions() {
+    return defaults.borderColor !== 'rgba(0,0,0,0.1)' || defaults.backgroundColor !== 'rgba(0,0,0,0.1)';
+}
+var plugin_colors = {
+    id: 'colors',
+    defaults: {
+        enabled: true,
+        forceOverride: false
+    },
+    beforeLayout (chart, _args, options) {
+        if (!options.enabled) {
+            return;
+        }
+        const { data: { datasets  } , options: chartOptions  } = chart.config;
+        const { elements  } = chartOptions;
+        const containsColorDefenition = containsColorsDefinitions(datasets) || containsColorsDefinition(chartOptions) || elements && containsColorsDefinitions(elements) || containsDefaultColorsDefenitions();
+        if (!options.forceOverride && containsColorDefenition) {
+            return;
+        }
+        const colorizer = getColorizer(chart);
+        datasets.forEach(colorizer);
+    }
+};
+
+function lttbDecimation(data, start, count, availableWidth, options) {
+ const samples = options.samples || availableWidth;
+    if (samples >= count) {
+        return data.slice(start, start + count);
+    }
+    const decimated = [];
+    const bucketWidth = (count - 2) / (samples - 2);
+    let sampledIndex = 0;
+    const endIndex = start + count - 1;
+    let a = start;
+    let i, maxAreaPoint, maxArea, area, nextA;
+    decimated[sampledIndex++] = data[a];
+    for(i = 0; i < samples - 2; i++){
+        let avgX = 0;
+        let avgY = 0;
+        let j;
+        const avgRangeStart = Math.floor((i + 1) * bucketWidth) + 1 + start;
+        const avgRangeEnd = Math.min(Math.floor((i + 2) * bucketWidth) + 1, count) + start;
+        const avgRangeLength = avgRangeEnd - avgRangeStart;
+        for(j = avgRangeStart; j < avgRangeEnd; j++){
+            avgX += data[j].x;
+            avgY += data[j].y;
+        }
+        avgX /= avgRangeLength;
+        avgY /= avgRangeLength;
+        const rangeOffs = Math.floor(i * bucketWidth) + 1 + start;
+        const rangeTo = Math.min(Math.floor((i + 1) * bucketWidth) + 1, count) + start;
+        const { x: pointAx , y: pointAy  } = data[a];
+        maxArea = area = -1;
+        for(j = rangeOffs; j < rangeTo; j++){
+            area = 0.5 * Math.abs((pointAx - avgX) * (data[j].y - pointAy) - (pointAx - data[j].x) * (avgY - pointAy));
+            if (area > maxArea) {
+                maxArea = area;
+                maxAreaPoint = data[j];
+                nextA = j;
+            }
+        }
+        decimated[sampledIndex++] = maxAreaPoint;
+        a = nextA;
+    }
+    decimated[sampledIndex++] = data[endIndex];
+    return decimated;
+}
+function minMaxDecimation(data, start, count, availableWidth) {
+    let avgX = 0;
+    let countX = 0;
+    let i, point, x, y, prevX, minIndex, maxIndex, startIndex, minY, maxY;
+    const decimated = [];
+    const endIndex = start + count - 1;
+    const xMin = data[start].x;
+    const xMax = data[endIndex].x;
+    const dx = xMax - xMin;
+    for(i = start; i < start + count; ++i){
+        point = data[i];
+        x = (point.x - xMin) / dx * availableWidth;
+        y = point.y;
+        const truncX = x | 0;
+        if (truncX === prevX) {
+            if (y < minY) {
+                minY = y;
+                minIndex = i;
+            } else if (y > maxY) {
+                maxY = y;
+                maxIndex = i;
+            }
+            avgX = (countX * avgX + point.x) / ++countX;
+        } else {
+            const lastIndex = i - 1;
+            if (!isNullOrUndef(minIndex) && !isNullOrUndef(maxIndex)) {
+                const intermediateIndex1 = Math.min(minIndex, maxIndex);
+                const intermediateIndex2 = Math.max(minIndex, maxIndex);
+                if (intermediateIndex1 !== startIndex && intermediateIndex1 !== lastIndex) {
+                    decimated.push({
+                        ...data[intermediateIndex1],
+                        x: avgX
+                    });
+                }
+                if (intermediateIndex2 !== startIndex && intermediateIndex2 !== lastIndex) {
+                    decimated.push({
+                        ...data[intermediateIndex2],
+                        x: avgX
+                    });
+                }
+            }
+            if (i > 0 && lastIndex !== startIndex) {
+                decimated.push(data[lastIndex]);
+            }
+            decimated.push(point);
+            prevX = truncX;
+            countX = 0;
+            minY = maxY = y;
+            minIndex = maxIndex = startIndex = i;
+        }
+    }
+    return decimated;
+}
+function cleanDecimatedDataset(dataset) {
+    if (dataset._decimated) {
+        const data = dataset._data;
+        delete dataset._decimated;
+        delete dataset._data;
+        Object.defineProperty(dataset, 'data', {
+            configurable: true,
+            enumerable: true,
+            writable: true,
+            value: data
+        });
+    }
+}
+function cleanDecimatedData(chart) {
+    chart.data.datasets.forEach((dataset)=>{
+        cleanDecimatedDataset(dataset);
+    });
+}
+function getStartAndCountOfVisiblePointsSimplified(meta, points) {
+    const pointCount = points.length;
+    let start = 0;
+    let count;
+    const { iScale  } = meta;
+    const { min , max , minDefined , maxDefined  } = iScale.getUserBounds();
+    if (minDefined) {
+        start = _limitValue(_lookupByKey(points, iScale.axis, min).lo, 0, pointCount - 1);
+    }
+    if (maxDefined) {
+        count = _limitValue(_lookupByKey(points, iScale.axis, max).hi + 1, start, pointCount) - start;
+    } else {
+        count = pointCount - start;
+    }
+    return {
+        start,
+        count
+    };
+}
+var plugin_decimation = {
+    id: 'decimation',
+    defaults: {
+        algorithm: 'min-max',
+        enabled: false
+    },
+    beforeElementsUpdate: (chart, args, options)=>{
+        if (!options.enabled) {
+            cleanDecimatedData(chart);
+            return;
+        }
+        const availableWidth = chart.width;
+        chart.data.datasets.forEach((dataset, datasetIndex)=>{
+            const { _data , indexAxis  } = dataset;
+            const meta = chart.getDatasetMeta(datasetIndex);
+            const data = _data || dataset.data;
+            if (resolve([
+                indexAxis,
+                chart.options.indexAxis
+            ]) === 'y') {
+                return;
+            }
+            if (!meta.controller.supportsDecimation) {
+                return;
+            }
+            const xAxis = chart.scales[meta.xAxisID];
+            if (xAxis.type !== 'linear' && xAxis.type !== 'time') {
+                return;
+            }
+            if (chart.options.parsing) {
+                return;
+            }
+            let { start , count  } = getStartAndCountOfVisiblePointsSimplified(meta, data);
+            const threshold = options.threshold || 4 * availableWidth;
+            if (count <= threshold) {
+                cleanDecimatedDataset(dataset);
+                return;
+            }
+            if (isNullOrUndef(_data)) {
+                dataset._data = data;
+                delete dataset.data;
+                Object.defineProperty(dataset, 'data', {
+                    configurable: true,
+                    enumerable: true,
+                    get: function() {
+                        return this._decimated;
+                    },
+                    set: function(d) {
+                        this._data = d;
+                    }
+                });
+            }
+            let decimated;
+            switch(options.algorithm){
+                case 'lttb':
+                    decimated = lttbDecimation(data, start, count, availableWidth, options);
+                    break;
+                case 'min-max':
+                    decimated = minMaxDecimation(data, start, count, availableWidth);
+                    break;
+                default:
+                    throw new Error(`Unsupported decimation algorithm '${options.algorithm}'`);
+            }
+            dataset._decimated = decimated;
+        });
+    },
+    destroy (chart) {
+        cleanDecimatedData(chart);
+    }
+};
+
+function _segments(line, target, property) {
+    const segments = line.segments;
+    const points = line.points;
+    const tpoints = target.points;
+    const parts = [];
+    for (const segment of segments){
+        let { start , end  } = segment;
+        end = _findSegmentEnd(start, end, points);
+        const bounds = _getBounds(property, points[start], points[end], segment.loop);
+        if (!target.segments) {
+            parts.push({
+                source: segment,
+                target: bounds,
+                start: points[start],
+                end: points[end]
+            });
+            continue;
+        }
+        const targetSegments = _boundSegments(target, bounds);
+        for (const tgt of targetSegments){
+            const subBounds = _getBounds(property, tpoints[tgt.start], tpoints[tgt.end], tgt.loop);
+            const fillSources = _boundSegment(segment, points, subBounds);
+            for (const fillSource of fillSources){
+                parts.push({
+                    source: fillSource,
+                    target: tgt,
+                    start: {
+                        [property]: _getEdge(bounds, subBounds, 'start', Math.max)
+                    },
+                    end: {
+                        [property]: _getEdge(bounds, subBounds, 'end', Math.min)
+                    }
+                });
+            }
+        }
+    }
+    return parts;
+}
+function _getBounds(property, first, last, loop) {
+    if (loop) {
+        return;
+    }
+    let start = first[property];
+    let end = last[property];
+    if (property === 'angle') {
+        start = _normalizeAngle(start);
+        end = _normalizeAngle(end);
+    }
+    return {
+        property,
+        start,
+        end
+    };
+}
+function _pointsFromSegments(boundary, line) {
+    const { x =null , y =null  } = boundary || {};
+    const linePoints = line.points;
+    const points = [];
+    line.segments.forEach(({ start , end  })=>{
+        end = _findSegmentEnd(start, end, linePoints);
+        const first = linePoints[start];
+        const last = linePoints[end];
+        if (y !== null) {
+            points.push({
+                x: first.x,
+                y
+            });
+            points.push({
+                x: last.x,
+                y
+            });
+        } else if (x !== null) {
+            points.push({
+                x,
+                y: first.y
+            });
+            points.push({
+                x,
+                y: last.y
+            });
+        }
+    });
+    return points;
+}
+function _findSegmentEnd(start, end, points) {
+    for(; end > start; end--){
+        const point = points[end];
+        if (!isNaN(point.x) && !isNaN(point.y)) {
+            break;
+        }
+    }
+    return end;
+}
+function _getEdge(a, b, prop, fn) {
+    if (a && b) {
+        return fn(a[prop], b[prop]);
+    }
+    return a ? a[prop] : b ? b[prop] : 0;
+}
+
+function _createBoundaryLine(boundary, line) {
+    let points = [];
+    let _loop = false;
+    if (isArray(boundary)) {
+        _loop = true;
+        points = boundary;
+    } else {
+        points = _pointsFromSegments(boundary, line);
+    }
+    return points.length ? new LineElement({
+        points,
+        options: {
+            tension: 0
+        },
+        _loop,
+        _fullLoop: _loop
+    }) : null;
+}
+function _shouldApplyFill(source) {
+    return source && source.fill !== false;
+}
+
+function _resolveTarget(sources, index, propagate) {
+    const source = sources[index];
+    let fill = source.fill;
+    const visited = [
+        index
+    ];
+    let target;
+    if (!propagate) {
+        return fill;
+    }
+    while(fill !== false && visited.indexOf(fill) === -1){
+        if (!isNumberFinite(fill)) {
+            return fill;
+        }
+        target = sources[fill];
+        if (!target) {
+            return false;
+        }
+        if (target.visible) {
+            return fill;
+        }
+        visited.push(fill);
+        fill = target.fill;
+    }
+    return false;
+}
+ function _decodeFill(line, index, count) {
+     const fill = parseFillOption(line);
+    if (isObject(fill)) {
+        return isNaN(fill.value) ? false : fill;
+    }
+    let target = parseFloat(fill);
+    if (isNumberFinite(target) && Math.floor(target) === target) {
+        return decodeTargetIndex(fill[0], index, target, count);
+    }
+    return [
+        'origin',
+        'start',
+        'end',
+        'stack',
+        'shape'
+    ].indexOf(fill) >= 0 && fill;
+}
+function decodeTargetIndex(firstCh, index, target, count) {
+    if (firstCh === '-' || firstCh === '+') {
+        target = index + target;
+    }
+    if (target === index || target < 0 || target >= count) {
+        return false;
+    }
+    return target;
+}
+ function _getTargetPixel(fill, scale) {
+    let pixel = null;
+    if (fill === 'start') {
+        pixel = scale.bottom;
+    } else if (fill === 'end') {
+        pixel = scale.top;
+    } else if (isObject(fill)) {
+        pixel = scale.getPixelForValue(fill.value);
+    } else if (scale.getBasePixel) {
+        pixel = scale.getBasePixel();
+    }
+    return pixel;
+}
+ function _getTargetValue(fill, scale, startValue) {
+    let value;
+    if (fill === 'start') {
+        value = startValue;
+    } else if (fill === 'end') {
+        value = scale.options.reverse ? scale.min : scale.max;
+    } else if (isObject(fill)) {
+        value = fill.value;
+    } else {
+        value = scale.getBaseValue();
+    }
+    return value;
+}
+ function parseFillOption(line) {
+    const options = line.options;
+    const fillOption = options.fill;
+    let fill = valueOrDefault(fillOption && fillOption.target, fillOption);
+    if (fill === undefined) {
+        fill = !!options.backgroundColor;
+    }
+    if (fill === false || fill === null) {
+        return false;
+    }
+    if (fill === true) {
+        return 'origin';
+    }
+    return fill;
+}
+
+function _buildStackLine(source) {
+    const { scale , index , line  } = source;
+    const points = [];
+    const segments = line.segments;
+    const sourcePoints = line.points;
+    const linesBelow = getLinesBelow(scale, index);
+    linesBelow.push(_createBoundaryLine({
+        x: null,
+        y: scale.bottom
+    }, line));
+    for(let i = 0; i < segments.length; i++){
+        const segment = segments[i];
+        for(let j = segment.start; j <= segment.end; j++){
+            addPointsBelow(points, sourcePoints[j], linesBelow);
+        }
+    }
+    return new LineElement({
+        points,
+        options: {}
+    });
+}
+ function getLinesBelow(scale, index) {
+    const below = [];
+    const metas = scale.getMatchingVisibleMetas('line');
+    for(let i = 0; i < metas.length; i++){
+        const meta = metas[i];
+        if (meta.index === index) {
+            break;
+        }
+        if (!meta.hidden) {
+            below.unshift(meta.dataset);
+        }
+    }
+    return below;
+}
+ function addPointsBelow(points, sourcePoint, linesBelow) {
+    const postponed = [];
+    for(let j = 0; j < linesBelow.length; j++){
+        const line = linesBelow[j];
+        const { first , last , point  } = findPoint(line, sourcePoint, 'x');
+        if (!point || first && last) {
+            continue;
+        }
+        if (first) {
+            postponed.unshift(point);
+        } else {
+            points.push(point);
+            if (!last) {
+                break;
+            }
+        }
+    }
+    points.push(...postponed);
+}
+ function findPoint(line, sourcePoint, property) {
+    const point = line.interpolate(sourcePoint, property);
+    if (!point) {
+        return {};
+    }
+    const pointValue = point[property];
+    const segments = line.segments;
+    const linePoints = line.points;
+    let first = false;
+    let last = false;
+    for(let i = 0; i < segments.length; i++){
+        const segment = segments[i];
+        const firstValue = linePoints[segment.start][property];
+        const lastValue = linePoints[segment.end][property];
+        if (_isBetween(pointValue, firstValue, lastValue)) {
+            first = pointValue === firstValue;
+            last = pointValue === lastValue;
+            break;
+        }
+    }
+    return {
+        first,
+        last,
+        point
+    };
+}
+
+class simpleArc {
+    constructor(opts){
+        this.x = opts.x;
+        this.y = opts.y;
+        this.radius = opts.radius;
+    }
+    pathSegment(ctx, bounds, opts) {
+        const { x , y , radius  } = this;
+        bounds = bounds || {
+            start: 0,
+            end: TAU
+        };
+        ctx.arc(x, y, radius, bounds.end, bounds.start, true);
+        return !opts.bounds;
+    }
+    interpolate(point) {
+        const { x , y , radius  } = this;
+        const angle = point.angle;
+        return {
+            x: x + Math.cos(angle) * radius,
+            y: y + Math.sin(angle) * radius,
+            angle
+        };
+    }
+}
+
+function _getTarget(source) {
+    const { chart , fill , line  } = source;
+    if (isNumberFinite(fill)) {
+        return getLineByIndex(chart, fill);
+    }
+    if (fill === 'stack') {
+        return _buildStackLine(source);
+    }
+    if (fill === 'shape') {
+        return true;
+    }
+    const boundary = computeBoundary(source);
+    if (boundary instanceof simpleArc) {
+        return boundary;
+    }
+    return _createBoundaryLine(boundary, line);
+}
+ function getLineByIndex(chart, index) {
+    const meta = chart.getDatasetMeta(index);
+    const visible = meta && chart.isDatasetVisible(index);
+    return visible ? meta.dataset : null;
+}
+function computeBoundary(source) {
+    const scale = source.scale || {};
+    if (scale.getPointPositionForValue) {
+        return computeCircularBoundary(source);
+    }
+    return computeLinearBoundary(source);
+}
+function computeLinearBoundary(source) {
+    const { scale ={} , fill  } = source;
+    const pixel = _getTargetPixel(fill, scale);
+    if (isNumberFinite(pixel)) {
+        const horizontal = scale.isHorizontal();
+        return {
+            x: horizontal ? pixel : null,
+            y: horizontal ? null : pixel
+        };
+    }
+    return null;
+}
+function computeCircularBoundary(source) {
+    const { scale , fill  } = source;
+    const options = scale.options;
+    const length = scale.getLabels().length;
+    const start = options.reverse ? scale.max : scale.min;
+    const value = _getTargetValue(fill, scale, start);
+    const target = [];
+    if (options.grid.circular) {
+        const center = scale.getPointPositionForValue(0, start);
+        return new simpleArc({
+            x: center.x,
+            y: center.y,
+            radius: scale.getDistanceFromCenterForValue(value)
+        });
+    }
+    for(let i = 0; i < length; ++i){
+        target.push(scale.getPointPositionForValue(i, value));
+    }
+    return target;
+}
+
+function _drawfill(ctx, source, area) {
+    const target = _getTarget(source);
+    const { chart , index , line , scale , axis  } = source;
+    const lineOpts = line.options;
+    const fillOption = lineOpts.fill;
+    const color = lineOpts.backgroundColor;
+    const { above =color , below =color  } = fillOption || {};
+    const meta = chart.getDatasetMeta(index);
+    const clip = getDatasetClipArea(chart, meta);
+    if (target && line.points.length) {
+        clipArea(ctx, area);
+        doFill(ctx, {
+            line,
+            target,
+            above,
+            below,
+            area,
+            scale,
+            axis,
+            clip
+        });
+        unclipArea(ctx);
+    }
+}
+function doFill(ctx, cfg) {
+    const { line , target , above , below , area , scale , clip  } = cfg;
+    const property = line._loop ? 'angle' : cfg.axis;
+    ctx.save();
+    let fillColor = below;
+    if (below !== above) {
+        if (property === 'x') {
+            clipVertical(ctx, target, area.top);
+            fill(ctx, {
+                line,
+                target,
+                color: above,
+                scale,
+                property,
+                clip
+            });
+            ctx.restore();
+            ctx.save();
+            clipVertical(ctx, target, area.bottom);
+        } else if (property === 'y') {
+            clipHorizontal(ctx, target, area.left);
+            fill(ctx, {
+                line,
+                target,
+                color: below,
+                scale,
+                property,
+                clip
+            });
+            ctx.restore();
+            ctx.save();
+            clipHorizontal(ctx, target, area.right);
+            fillColor = above;
+        }
+    }
+    fill(ctx, {
+        line,
+        target,
+        color: fillColor,
+        scale,
+        property,
+        clip
+    });
+    ctx.restore();
+}
+function clipVertical(ctx, target, clipY) {
+    const { segments , points  } = target;
+    let first = true;
+    let lineLoop = false;
+    ctx.beginPath();
+    for (const segment of segments){
+        const { start , end  } = segment;
+        const firstPoint = points[start];
+        const lastPoint = points[_findSegmentEnd(start, end, points)];
+        if (first) {
+            ctx.moveTo(firstPoint.x, firstPoint.y);
+            first = false;
+        } else {
+            ctx.lineTo(firstPoint.x, clipY);
+            ctx.lineTo(firstPoint.x, firstPoint.y);
+        }
+        lineLoop = !!target.pathSegment(ctx, segment, {
+            move: lineLoop
+        });
+        if (lineLoop) {
+            ctx.closePath();
+        } else {
+            ctx.lineTo(lastPoint.x, clipY);
+        }
+    }
+    ctx.lineTo(target.first().x, clipY);
+    ctx.closePath();
+    ctx.clip();
+}
+function clipHorizontal(ctx, target, clipX) {
+    const { segments , points  } = target;
+    let first = true;
+    let lineLoop = false;
+    ctx.beginPath();
+    for (const segment of segments){
+        const { start , end  } = segment;
+        const firstPoint = points[start];
+        const lastPoint = points[_findSegmentEnd(start, end, points)];
+        if (first) {
+            ctx.moveTo(firstPoint.x, firstPoint.y);
+            first = false;
+        } else {
+            ctx.lineTo(clipX, firstPoint.y);
+            ctx.lineTo(firstPoint.x, firstPoint.y);
+        }
+        lineLoop = !!target.pathSegment(ctx, segment, {
+            move: lineLoop
+        });
+        if (lineLoop) {
+            ctx.closePath();
+        } else {
+            ctx.lineTo(clipX, lastPoint.y);
+        }
+    }
+    ctx.lineTo(clipX, target.first().y);
+    ctx.closePath();
+    ctx.clip();
+}
+function fill(ctx, cfg) {
+    const { line , target , property , color , scale , clip  } = cfg;
+    const segments = _segments(line, target, property);
+    for (const { source: src , target: tgt , start , end  } of segments){
+        const { style: { backgroundColor =color  } = {}  } = src;
+        const notShape = target !== true;
+        ctx.save();
+        ctx.fillStyle = backgroundColor;
+        clipBounds(ctx, scale, clip, notShape && _getBounds(property, start, end));
+        ctx.beginPath();
+        const lineLoop = !!line.pathSegment(ctx, src);
+        let loop;
+        if (notShape) {
+            if (lineLoop) {
+                ctx.closePath();
+            } else {
+                interpolatedLineTo(ctx, target, end, property);
+            }
+            const targetLoop = !!target.pathSegment(ctx, tgt, {
+                move: lineLoop,
+                reverse: true
+            });
+            loop = lineLoop && targetLoop;
+            if (!loop) {
+                interpolatedLineTo(ctx, target, start, property);
+            }
+        }
+        ctx.closePath();
+        ctx.fill(loop ? 'evenodd' : 'nonzero');
+        ctx.restore();
+    }
+}
+function clipBounds(ctx, scale, clip, bounds) {
+    const chartArea = scale.chart.chartArea;
+    const { property , start , end  } = bounds || {};
+    if (property === 'x' || property === 'y') {
+        let left, top, right, bottom;
+        if (property === 'x') {
+            left = start;
+            top = chartArea.top;
+            right = end;
+            bottom = chartArea.bottom;
+        } else {
+            left = chartArea.left;
+            top = start;
+            right = chartArea.right;
+            bottom = end;
+        }
+        ctx.beginPath();
+        if (clip) {
+            left = Math.max(left, clip.left);
+            right = Math.min(right, clip.right);
+            top = Math.max(top, clip.top);
+            bottom = Math.min(bottom, clip.bottom);
+        }
+        ctx.rect(left, top, right - left, bottom - top);
+        ctx.clip();
+    }
+}
+function interpolatedLineTo(ctx, target, point, property) {
+    const interpolatedPoint = target.interpolate(point, property);
+    if (interpolatedPoint) {
+        ctx.lineTo(interpolatedPoint.x, interpolatedPoint.y);
+    }
+}
+
+var index = {
+    id: 'filler',
+    afterDatasetsUpdate (chart, _args, options) {
+        const count = (chart.data.datasets || []).length;
+        const sources = [];
+        let meta, i, line, source;
+        for(i = 0; i < count; ++i){
+            meta = chart.getDatasetMeta(i);
+            line = meta.dataset;
+            source = null;
+            if (line && line.options && line instanceof LineElement) {
+                source = {
+                    visible: chart.isDatasetVisible(i),
+                    index: i,
+                    fill: _decodeFill(line, i, count),
+                    chart,
+                    axis: meta.controller.options.indexAxis,
+                    scale: meta.vScale,
+                    line
+                };
+            }
+            meta.$filler = source;
+            sources.push(source);
+        }
+        for(i = 0; i < count; ++i){
+            source = sources[i];
+            if (!source || source.fill === false) {
+                continue;
+            }
+            source.fill = _resolveTarget(sources, i, options.propagate);
+        }
+    },
+    beforeDraw (chart, _args, options) {
+        const draw = options.drawTime === 'beforeDraw';
+        const metasets = chart.getSortedVisibleDatasetMetas();
+        const area = chart.chartArea;
+        for(let i = metasets.length - 1; i >= 0; --i){
+            const source = metasets[i].$filler;
+            if (!source) {
+                continue;
+            }
+            source.line.updateControlPoints(area, source.axis);
+            if (draw && source.fill) {
+                _drawfill(chart.ctx, source, area);
+            }
+        }
+    },
+    beforeDatasetsDraw (chart, _args, options) {
+        if (options.drawTime !== 'beforeDatasetsDraw') {
+            return;
+        }
+        const metasets = chart.getSortedVisibleDatasetMetas();
+        for(let i = metasets.length - 1; i >= 0; --i){
+            const source = metasets[i].$filler;
+            if (_shouldApplyFill(source)) {
+                _drawfill(chart.ctx, source, chart.chartArea);
+            }
+        }
+    },
+    beforeDatasetDraw (chart, args, options) {
+        const source = args.meta.$filler;
+        if (!_shouldApplyFill(source) || options.drawTime !== 'beforeDatasetDraw') {
+            return;
+        }
+        _drawfill(chart.ctx, source, chart.chartArea);
+    },
+    defaults: {
+        propagate: true,
+        drawTime: 'beforeDatasetDraw'
+    }
+};
+
+const getBoxSize = (labelOpts, fontSize)=>{
+    let { boxHeight =fontSize , boxWidth =fontSize  } = labelOpts;
+    if (labelOpts.usePointStyle) {
+        boxHeight = Math.min(boxHeight, fontSize);
+        boxWidth = labelOpts.pointStyleWidth || Math.min(boxWidth, fontSize);
+    }
+    return {
+        boxWidth,
+        boxHeight,
+        itemHeight: Math.max(fontSize, boxHeight)
+    };
+};
+const itemsEqual = (a, b)=>a !== null && b !== null && a.datasetIndex === b.datasetIndex && a.index === b.index;
+class Legend extends Element {
+ constructor(config){
+        super();
+        this._added = false;
+        this.legendHitBoxes = [];
+ this._hoveredItem = null;
+        this.doughnutMode = false;
+        this.chart = config.chart;
+        this.options = config.options;
+        this.ctx = config.ctx;
+        this.legendItems = undefined;
+        this.columnSizes = undefined;
+        this.lineWidths = undefined;
+        this.maxHeight = undefined;
+        this.maxWidth = undefined;
+        this.top = undefined;
+        this.bottom = undefined;
+        this.left = undefined;
+        this.right = undefined;
+        this.height = undefined;
+        this.width = undefined;
+        this._margins = undefined;
+        this.position = undefined;
+        this.weight = undefined;
+        this.fullSize = undefined;
+    }
+    update(maxWidth, maxHeight, margins) {
+        this.maxWidth = maxWidth;
+        this.maxHeight = maxHeight;
+        this._margins = margins;
+        this.setDimensions();
+        this.buildLabels();
+        this.fit();
+    }
+    setDimensions() {
+        if (this.isHorizontal()) {
+            this.width = this.maxWidth;
+            this.left = this._margins.left;
+            this.right = this.width;
+        } else {
+            this.height = this.maxHeight;
+            this.top = this._margins.top;
+            this.bottom = this.height;
+        }
+    }
+    buildLabels() {
+        const labelOpts = this.options.labels || {};
+        let legendItems = callback(labelOpts.generateLabels, [
+            this.chart
+        ], this) || [];
+        if (labelOpts.filter) {
+            legendItems = legendItems.filter((item)=>labelOpts.filter(item, this.chart.data));
+        }
+        if (labelOpts.sort) {
+            legendItems = legendItems.sort((a, b)=>labelOpts.sort(a, b, this.chart.data));
+        }
+        if (this.options.reverse) {
+            legendItems.reverse();
+        }
+        this.legendItems = legendItems;
+    }
+    fit() {
+        const { options , ctx  } = this;
+        if (!options.display) {
+            this.width = this.height = 0;
+            return;
+        }
+        const labelOpts = options.labels;
+        const labelFont = toFont(labelOpts.font);
+        const fontSize = labelFont.size;
+        const titleHeight = this._computeTitleHeight();
+        const { boxWidth , itemHeight  } = getBoxSize(labelOpts, fontSize);
+        let width, height;
+        ctx.font = labelFont.string;
+        if (this.isHorizontal()) {
+            width = this.maxWidth;
+            height = this._fitRows(titleHeight, fontSize, boxWidth, itemHeight) + 10;
+        } else {
+            height = this.maxHeight;
+            width = this._fitCols(titleHeight, labelFont, boxWidth, itemHeight) + 10;
+        }
+        this.width = Math.min(width, options.maxWidth || this.maxWidth);
+        this.height = Math.min(height, options.maxHeight || this.maxHeight);
+    }
+ _fitRows(titleHeight, fontSize, boxWidth, itemHeight) {
+        const { ctx , maxWidth , options: { labels: { padding  }  }  } = this;
+        const hitboxes = this.legendHitBoxes = [];
+        const lineWidths = this.lineWidths = [
+            0
+        ];
+        const lineHeight = itemHeight + padding;
+        let totalHeight = titleHeight;
+        ctx.textAlign = 'left';
+        ctx.textBaseline = 'middle';
+        let row = -1;
+        let top = -lineHeight;
+        this.legendItems.forEach((legendItem, i)=>{
+            const itemWidth = boxWidth + fontSize / 2 + ctx.measureText(legendItem.text).width;
+            if (i === 0 || lineWidths[lineWidths.length - 1] + itemWidth + 2 * padding > maxWidth) {
+                totalHeight += lineHeight;
+                lineWidths[lineWidths.length - (i > 0 ? 0 : 1)] = 0;
+                top += lineHeight;
+                row++;
+            }
+            hitboxes[i] = {
+                left: 0,
+                top,
+                row,
+                width: itemWidth,
+                height: itemHeight
+            };
+            lineWidths[lineWidths.length - 1] += itemWidth + padding;
+        });
+        return totalHeight;
+    }
+    _fitCols(titleHeight, labelFont, boxWidth, _itemHeight) {
+        const { ctx , maxHeight , options: { labels: { padding  }  }  } = this;
+        const hitboxes = this.legendHitBoxes = [];
+        const columnSizes = this.columnSizes = [];
+        const heightLimit = maxHeight - titleHeight;
+        let totalWidth = padding;
+        let currentColWidth = 0;
+        let currentColHeight = 0;
+        let left = 0;
+        let col = 0;
+        this.legendItems.forEach((legendItem, i)=>{
+            const { itemWidth , itemHeight  } = calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight);
+            if (i > 0 && currentColHeight + itemHeight + 2 * padding > heightLimit) {
+                totalWidth += currentColWidth + padding;
+                columnSizes.push({
+                    width: currentColWidth,
+                    height: currentColHeight
+                });
+                left += currentColWidth + padding;
+                col++;
+                currentColWidth = currentColHeight = 0;
+            }
+            hitboxes[i] = {
+                left,
+                top: currentColHeight,
+                col,
+                width: itemWidth,
+                height: itemHeight
+            };
+            currentColWidth = Math.max(currentColWidth, itemWidth);
+            currentColHeight += itemHeight + padding;
+        });
+        totalWidth += currentColWidth;
+        columnSizes.push({
+            width: currentColWidth,
+            height: currentColHeight
+        });
+        return totalWidth;
+    }
+    adjustHitBoxes() {
+        if (!this.options.display) {
+            return;
+        }
+        const titleHeight = this._computeTitleHeight();
+        const { legendHitBoxes: hitboxes , options: { align , labels: { padding  } , rtl  }  } = this;
+        const rtlHelper = getRtlAdapter(rtl, this.left, this.width);
+        if (this.isHorizontal()) {
+            let row = 0;
+            let left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);
+            for (const hitbox of hitboxes){
+                if (row !== hitbox.row) {
+                    row = hitbox.row;
+                    left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);
+                }
+                hitbox.top += this.top + titleHeight + padding;
+                hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(left), hitbox.width);
+                left += hitbox.width + padding;
+            }
+        } else {
+            let col = 0;
+            let top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);
+            for (const hitbox of hitboxes){
+                if (hitbox.col !== col) {
+                    col = hitbox.col;
+                    top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);
+                }
+                hitbox.top = top;
+                hitbox.left += this.left + padding;
+                hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(hitbox.left), hitbox.width);
+                top += hitbox.height + padding;
+            }
+        }
+    }
+    isHorizontal() {
+        return this.options.position === 'top' || this.options.position === 'bottom';
+    }
+    draw() {
+        if (this.options.display) {
+            const ctx = this.ctx;
+            clipArea(ctx, this);
+            this._draw();
+            unclipArea(ctx);
+        }
+    }
+ _draw() {
+        const { options: opts , columnSizes , lineWidths , ctx  } = this;
+        const { align , labels: labelOpts  } = opts;
+        const defaultColor = defaults.color;
+        const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);
+        const labelFont = toFont(labelOpts.font);
+        const { padding  } = labelOpts;
+        const fontSize = labelFont.size;
+        const halfFontSize = fontSize / 2;
+        let cursor;
+        this.drawTitle();
+        ctx.textAlign = rtlHelper.textAlign('left');
+        ctx.textBaseline = 'middle';
+        ctx.lineWidth = 0.5;
+        ctx.font = labelFont.string;
+        const { boxWidth , boxHeight , itemHeight  } = getBoxSize(labelOpts, fontSize);
+        const drawLegendBox = function(x, y, legendItem) {
+            if (isNaN(boxWidth) || boxWidth <= 0 || isNaN(boxHeight) || boxHeight < 0) {
+                return;
+            }
+            ctx.save();
+            const lineWidth = valueOrDefault(legendItem.lineWidth, 1);
+            ctx.fillStyle = valueOrDefault(legendItem.fillStyle, defaultColor);
+            ctx.lineCap = valueOrDefault(legendItem.lineCap, 'butt');
+            ctx.lineDashOffset = valueOrDefault(legendItem.lineDashOffset, 0);
+            ctx.lineJoin = valueOrDefault(legendItem.lineJoin, 'miter');
+            ctx.lineWidth = lineWidth;
+            ctx.strokeStyle = valueOrDefault(legendItem.strokeStyle, defaultColor);
+            ctx.setLineDash(valueOrDefault(legendItem.lineDash, []));
+            if (labelOpts.usePointStyle) {
+                const drawOptions = {
+                    radius: boxHeight * Math.SQRT2 / 2,
+                    pointStyle: legendItem.pointStyle,
+                    rotation: legendItem.rotation,
+                    borderWidth: lineWidth
+                };
+                const centerX = rtlHelper.xPlus(x, boxWidth / 2);
+                const centerY = y + halfFontSize;
+                drawPointLegend(ctx, drawOptions, centerX, centerY, labelOpts.pointStyleWidth && boxWidth);
+            } else {
+                const yBoxTop = y + Math.max((fontSize - boxHeight) / 2, 0);
+                const xBoxLeft = rtlHelper.leftForLtr(x, boxWidth);
+                const borderRadius = toTRBLCorners(legendItem.borderRadius);
+                ctx.beginPath();
+                if (Object.values(borderRadius).some((v)=>v !== 0)) {
+                    addRoundedRectPath(ctx, {
+                        x: xBoxLeft,
+                        y: yBoxTop,
+                        w: boxWidth,
+                        h: boxHeight,
+                        radius: borderRadius
+                    });
+                } else {
+                    ctx.rect(xBoxLeft, yBoxTop, boxWidth, boxHeight);
+                }
+                ctx.fill();
+                if (lineWidth !== 0) {
+                    ctx.stroke();
+                }
+            }
+            ctx.restore();
+        };
+        const fillText = function(x, y, legendItem) {
+            renderText(ctx, legendItem.text, x, y + itemHeight / 2, labelFont, {
+                strikethrough: legendItem.hidden,
+                textAlign: rtlHelper.textAlign(legendItem.textAlign)
+            });
+        };
+        const isHorizontal = this.isHorizontal();
+        const titleHeight = this._computeTitleHeight();
+        if (isHorizontal) {
+            cursor = {
+                x: _alignStartEnd(align, this.left + padding, this.right - lineWidths[0]),
+                y: this.top + padding + titleHeight,
+                line: 0
+            };
+        } else {
+            cursor = {
+                x: this.left + padding,
+                y: _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[0].height),
+                line: 0
+            };
+        }
+        overrideTextDirection(this.ctx, opts.textDirection);
+        const lineHeight = itemHeight + padding;
+        this.legendItems.forEach((legendItem, i)=>{
+            ctx.strokeStyle = legendItem.fontColor;
+            ctx.fillStyle = legendItem.fontColor;
+            const textWidth = ctx.measureText(legendItem.text).width;
+            const textAlign = rtlHelper.textAlign(legendItem.textAlign || (legendItem.textAlign = labelOpts.textAlign));
+            const width = boxWidth + halfFontSize + textWidth;
+            let x = cursor.x;
+            let y = cursor.y;
+            rtlHelper.setWidth(this.width);
+            if (isHorizontal) {
+                if (i > 0 && x + width + padding > this.right) {
+                    y = cursor.y += lineHeight;
+                    cursor.line++;
+                    x = cursor.x = _alignStartEnd(align, this.left + padding, this.right - lineWidths[cursor.line]);
+                }
+            } else if (i > 0 && y + lineHeight > this.bottom) {
+                x = cursor.x = x + columnSizes[cursor.line].width + padding;
+                cursor.line++;
+                y = cursor.y = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[cursor.line].height);
+            }
+            const realX = rtlHelper.x(x);
+            drawLegendBox(realX, y, legendItem);
+            x = _textX(textAlign, x + boxWidth + halfFontSize, isHorizontal ? x + width : this.right, opts.rtl);
+            fillText(rtlHelper.x(x), y, legendItem);
+            if (isHorizontal) {
+                cursor.x += width + padding;
+            } else if (typeof legendItem.text !== 'string') {
+                const fontLineHeight = labelFont.lineHeight;
+                cursor.y += calculateLegendItemHeight(legendItem, fontLineHeight) + padding;
+            } else {
+                cursor.y += lineHeight;
+            }
+        });
+        restoreTextDirection(this.ctx, opts.textDirection);
+    }
+ drawTitle() {
+        const opts = this.options;
+        const titleOpts = opts.title;
+        const titleFont = toFont(titleOpts.font);
+        const titlePadding = toPadding(titleOpts.padding);
+        if (!titleOpts.display) {
+            return;
+        }
+        const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);
+        const ctx = this.ctx;
+        const position = titleOpts.position;
+        const halfFontSize = titleFont.size / 2;
+        const topPaddingPlusHalfFontSize = titlePadding.top + halfFontSize;
+        let y;
+        let left = this.left;
+        let maxWidth = this.width;
+        if (this.isHorizontal()) {
+            maxWidth = Math.max(...this.lineWidths);
+            y = this.top + topPaddingPlusHalfFontSize;
+            left = _alignStartEnd(opts.align, left, this.right - maxWidth);
+        } else {
+            const maxHeight = this.columnSizes.reduce((acc, size)=>Math.max(acc, size.height), 0);
+            y = topPaddingPlusHalfFontSize + _alignStartEnd(opts.align, this.top, this.bottom - maxHeight - opts.labels.padding - this._computeTitleHeight());
+        }
+        const x = _alignStartEnd(position, left, left + maxWidth);
+        ctx.textAlign = rtlHelper.textAlign(_toLeftRightCenter(position));
+        ctx.textBaseline = 'middle';
+        ctx.strokeStyle = titleOpts.color;
+        ctx.fillStyle = titleOpts.color;
+        ctx.font = titleFont.string;
+        renderText(ctx, titleOpts.text, x, y, titleFont);
+    }
+ _computeTitleHeight() {
+        const titleOpts = this.options.title;
+        const titleFont = toFont(titleOpts.font);
+        const titlePadding = toPadding(titleOpts.padding);
+        return titleOpts.display ? titleFont.lineHeight + titlePadding.height : 0;
+    }
+ _getLegendItemAt(x, y) {
+        let i, hitBox, lh;
+        if (_isBetween(x, this.left, this.right) && _isBetween(y, this.top, this.bottom)) {
+            lh = this.legendHitBoxes;
+            for(i = 0; i < lh.length; ++i){
+                hitBox = lh[i];
+                if (_isBetween(x, hitBox.left, hitBox.left + hitBox.width) && _isBetween(y, hitBox.top, hitBox.top + hitBox.height)) {
+                    return this.legendItems[i];
+                }
+            }
+        }
+        return null;
+    }
+ handleEvent(e) {
+        const opts = this.options;
+        if (!isListened(e.type, opts)) {
+            return;
+        }
+        const hoveredItem = this._getLegendItemAt(e.x, e.y);
+        if (e.type === 'mousemove' || e.type === 'mouseout') {
+            const previous = this._hoveredItem;
+            const sameItem = itemsEqual(previous, hoveredItem);
+            if (previous && !sameItem) {
+                callback(opts.onLeave, [
+                    e,
+                    previous,
+                    this
+                ], this);
+            }
+            this._hoveredItem = hoveredItem;
+            if (hoveredItem && !sameItem) {
+                callback(opts.onHover, [
+                    e,
+                    hoveredItem,
+                    this
+                ], this);
+            }
+        } else if (hoveredItem) {
+            callback(opts.onClick, [
+                e,
+                hoveredItem,
+                this
+            ], this);
+        }
+    }
+}
+function calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight) {
+    const itemWidth = calculateItemWidth(legendItem, boxWidth, labelFont, ctx);
+    const itemHeight = calculateItemHeight(_itemHeight, legendItem, labelFont.lineHeight);
+    return {
+        itemWidth,
+        itemHeight
+    };
+}
+function calculateItemWidth(legendItem, boxWidth, labelFont, ctx) {
+    let legendItemText = legendItem.text;
+    if (legendItemText && typeof legendItemText !== 'string') {
+        legendItemText = legendItemText.reduce((a, b)=>a.length > b.length ? a : b);
+    }
+    return boxWidth + labelFont.size / 2 + ctx.measureText(legendItemText).width;
+}
+function calculateItemHeight(_itemHeight, legendItem, fontLineHeight) {
+    let itemHeight = _itemHeight;
+    if (typeof legendItem.text !== 'string') {
+        itemHeight = calculateLegendItemHeight(legendItem, fontLineHeight);
+    }
+    return itemHeight;
+}
+function calculateLegendItemHeight(legendItem, fontLineHeight) {
+    const labelHeight = legendItem.text ? legendItem.text.length : 0;
+    return fontLineHeight * labelHeight;
+}
+function isListened(type, opts) {
+    if ((type === 'mousemove' || type === 'mouseout') && (opts.onHover || opts.onLeave)) {
+        return true;
+    }
+    if (opts.onClick && (type === 'click' || type === 'mouseup')) {
+        return true;
+    }
+    return false;
+}
+var plugin_legend = {
+    id: 'legend',
+ _element: Legend,
+    start (chart, _args, options) {
+        const legend = chart.legend = new Legend({
+            ctx: chart.ctx,
+            options,
+            chart
+        });
+        layouts.configure(chart, legend, options);
+        layouts.addBox(chart, legend);
+    },
+    stop (chart) {
+        layouts.removeBox(chart, chart.legend);
+        delete chart.legend;
+    },
+    beforeUpdate (chart, _args, options) {
+        const legend = chart.legend;
+        layouts.configure(chart, legend, options);
+        legend.options = options;
+    },
+    afterUpdate (chart) {
+        const legend = chart.legend;
+        legend.buildLabels();
+        legend.adjustHitBoxes();
+    },
+    afterEvent (chart, args) {
+        if (!args.replay) {
+            chart.legend.handleEvent(args.event);
+        }
+    },
+    defaults: {
+        display: true,
+        position: 'top',
+        align: 'center',
+        fullSize: true,
+        reverse: false,
+        weight: 1000,
+        onClick (e, legendItem, legend) {
+            const index = legendItem.datasetIndex;
+            const ci = legend.chart;
+            if (ci.isDatasetVisible(index)) {
+                ci.hide(index);
+                legendItem.hidden = true;
+            } else {
+                ci.show(index);
+                legendItem.hidden = false;
+            }
+        },
+        onHover: null,
+        onLeave: null,
+        labels: {
+            color: (ctx)=>ctx.chart.options.color,
+            boxWidth: 40,
+            padding: 10,
+            generateLabels (chart) {
+                const datasets = chart.data.datasets;
+                const { labels: { usePointStyle , pointStyle , textAlign , color , useBorderRadius , borderRadius  }  } = chart.legend.options;
+                return chart._getSortedDatasetMetas().map((meta)=>{
+                    const style = meta.controller.getStyle(usePointStyle ? 0 : undefined);
+                    const borderWidth = toPadding(style.borderWidth);
+                    return {
+                        text: datasets[meta.index].label,
+                        fillStyle: style.backgroundColor,
+                        fontColor: color,
+                        hidden: !meta.visible,
+                        lineCap: style.borderCapStyle,
+                        lineDash: style.borderDash,
+                        lineDashOffset: style.borderDashOffset,
+                        lineJoin: style.borderJoinStyle,
+                        lineWidth: (borderWidth.width + borderWidth.height) / 4,
+                        strokeStyle: style.borderColor,
+                        pointStyle: pointStyle || style.pointStyle,
+                        rotation: style.rotation,
+                        textAlign: textAlign || style.textAlign,
+                        borderRadius: useBorderRadius && (borderRadius || style.borderRadius),
+                        datasetIndex: meta.index
+                    };
+                }, this);
+            }
+        },
+        title: {
+            color: (ctx)=>ctx.chart.options.color,
+            display: false,
+            position: 'center',
+            text: ''
+        }
+    },
+    descriptors: {
+        _scriptable: (name)=>!name.startsWith('on'),
+        labels: {
+            _scriptable: (name)=>![
+                    'generateLabels',
+                    'filter',
+                    'sort'
+                ].includes(name)
+        }
+    }
+};
+
+class Title extends Element {
+ constructor(config){
+        super();
+        this.chart = config.chart;
+        this.options = config.options;
+        this.ctx = config.ctx;
+        this._padding = undefined;
+        this.top = undefined;
+        this.bottom = undefined;
+        this.left = undefined;
+        this.right = undefined;
+        this.width = undefined;
+        this.height = undefined;
+        this.position = undefined;
+        this.weight = undefined;
+        this.fullSize = undefined;
+    }
+    update(maxWidth, maxHeight) {
+        const opts = this.options;
+        this.left = 0;
+        this.top = 0;
+        if (!opts.display) {
+            this.width = this.height = this.right = this.bottom = 0;
+            return;
+        }
+        this.width = this.right = maxWidth;
+        this.height = this.bottom = maxHeight;
+        const lineCount = isArray(opts.text) ? opts.text.length : 1;
+        this._padding = toPadding(opts.padding);
+        const textSize = lineCount * toFont(opts.font).lineHeight + this._padding.height;
+        if (this.isHorizontal()) {
+            this.height = textSize;
+        } else {
+            this.width = textSize;
+        }
+    }
+    isHorizontal() {
+        const pos = this.options.position;
+        return pos === 'top' || pos === 'bottom';
+    }
+    _drawArgs(offset) {
+        const { top , left , bottom , right , options  } = this;
+        const align = options.align;
+        let rotation = 0;
+        let maxWidth, titleX, titleY;
+        if (this.isHorizontal()) {
+            titleX = _alignStartEnd(align, left, right);
+            titleY = top + offset;
+            maxWidth = right - left;
+        } else {
+            if (options.position === 'left') {
+                titleX = left + offset;
+                titleY = _alignStartEnd(align, bottom, top);
+                rotation = PI * -0.5;
+            } else {
+                titleX = right - offset;
+                titleY = _alignStartEnd(align, top, bottom);
+                rotation = PI * 0.5;
+            }
+            maxWidth = bottom - top;
+        }
+        return {
+            titleX,
+            titleY,
+            maxWidth,
+            rotation
+        };
+    }
+    draw() {
+        const ctx = this.ctx;
+        const opts = this.options;
+        if (!opts.display) {
+            return;
+        }
+        const fontOpts = toFont(opts.font);
+        const lineHeight = fontOpts.lineHeight;
+        const offset = lineHeight / 2 + this._padding.top;
+        const { titleX , titleY , maxWidth , rotation  } = this._drawArgs(offset);
+        renderText(ctx, opts.text, 0, 0, fontOpts, {
+            color: opts.color,
+            maxWidth,
+            rotation,
+            textAlign: _toLeftRightCenter(opts.align),
+            textBaseline: 'middle',
+            translation: [
+                titleX,
+                titleY
+            ]
+        });
+    }
+}
+function createTitle(chart, titleOpts) {
+    const title = new Title({
+        ctx: chart.ctx,
+        options: titleOpts,
+        chart
+    });
+    layouts.configure(chart, title, titleOpts);
+    layouts.addBox(chart, title);
+    chart.titleBlock = title;
+}
+var plugin_title = {
+    id: 'title',
+ _element: Title,
+    start (chart, _args, options) {
+        createTitle(chart, options);
+    },
+    stop (chart) {
+        const titleBlock = chart.titleBlock;
+        layouts.removeBox(chart, titleBlock);
+        delete chart.titleBlock;
+    },
+    beforeUpdate (chart, _args, options) {
+        const title = chart.titleBlock;
+        layouts.configure(chart, title, options);
+        title.options = options;
+    },
+    defaults: {
+        align: 'center',
+        display: false,
+        font: {
+            weight: 'bold'
+        },
+        fullSize: true,
+        padding: 10,
+        position: 'top',
+        text: '',
+        weight: 2000
+    },
+    defaultRoutes: {
+        color: 'color'
+    },
+    descriptors: {
+        _scriptable: true,
+        _indexable: false
+    }
+};
+
+const map = new WeakMap();
+var plugin_subtitle = {
+    id: 'subtitle',
+    start (chart, _args, options) {
+        const title = new Title({
+            ctx: chart.ctx,
+            options,
+            chart
+        });
+        layouts.configure(chart, title, options);
+        layouts.addBox(chart, title);
+        map.set(chart, title);
+    },
+    stop (chart) {
+        layouts.removeBox(chart, map.get(chart));
+        map.delete(chart);
+    },
+    beforeUpdate (chart, _args, options) {
+        const title = map.get(chart);
+        layouts.configure(chart, title, options);
+        title.options = options;
+    },
+    defaults: {
+        align: 'center',
+        display: false,
+        font: {
+            weight: 'normal'
+        },
+        fullSize: true,
+        padding: 0,
+        position: 'top',
+        text: '',
+        weight: 1500
+    },
+    defaultRoutes: {
+        color: 'color'
+    },
+    descriptors: {
+        _scriptable: true,
+        _indexable: false
+    }
+};
+
+const positioners = {
+ average (items) {
+        if (!items.length) {
+            return false;
+        }
+        let i, len;
+        let xSet = new Set();
+        let y = 0;
+        let count = 0;
+        for(i = 0, len = items.length; i < len; ++i){
+            const el = items[i].element;
+            if (el && el.hasValue()) {
+                const pos = el.tooltipPosition();
+                xSet.add(pos.x);
+                y += pos.y;
+                ++count;
+            }
+        }
+        if (count === 0 || xSet.size === 0) {
+            return false;
+        }
+        const xAverage = [
+            ...xSet
+        ].reduce((a, b)=>a + b) / xSet.size;
+        return {
+            x: xAverage,
+            y: y / count
+        };
+    },
+ nearest (items, eventPosition) {
+        if (!items.length) {
+            return false;
+        }
+        let x = eventPosition.x;
+        let y = eventPosition.y;
+        let minDistance = Number.POSITIVE_INFINITY;
+        let i, len, nearestElement;
+        for(i = 0, len = items.length; i < len; ++i){
+            const el = items[i].element;
+            if (el && el.hasValue()) {
+                const center = el.getCenterPoint();
+                const d = distanceBetweenPoints(eventPosition, center);
+                if (d < minDistance) {
+                    minDistance = d;
+                    nearestElement = el;
+                }
+            }
+        }
+        if (nearestElement) {
+            const tp = nearestElement.tooltipPosition();
+            x = tp.x;
+            y = tp.y;
+        }
+        return {
+            x,
+            y
+        };
+    }
+};
+function pushOrConcat(base, toPush) {
+    if (toPush) {
+        if (isArray(toPush)) {
+            Array.prototype.push.apply(base, toPush);
+        } else {
+            base.push(toPush);
+        }
+    }
+    return base;
+}
+ function splitNewlines(str) {
+    if ((typeof str === 'string' || str instanceof String) && str.indexOf('\n') > -1) {
+        return str.split('\n');
+    }
+    return str;
+}
+ function createTooltipItem(chart, item) {
+    const { element , datasetIndex , index  } = item;
+    const controller = chart.getDatasetMeta(datasetIndex).controller;
+    const { label , value  } = controller.getLabelAndValue(index);
+    return {
+        chart,
+        label,
+        parsed: controller.getParsed(index),
+        raw: chart.data.datasets[datasetIndex].data[index],
+        formattedValue: value,
+        dataset: controller.getDataset(),
+        dataIndex: index,
+        datasetIndex,
+        element
+    };
+}
+ function getTooltipSize(tooltip, options) {
+    const ctx = tooltip.chart.ctx;
+    const { body , footer , title  } = tooltip;
+    const { boxWidth , boxHeight  } = options;
+    const bodyFont = toFont(options.bodyFont);
+    const titleFont = toFont(options.titleFont);
+    const footerFont = toFont(options.footerFont);
+    const titleLineCount = title.length;
+    const footerLineCount = footer.length;
+    const bodyLineItemCount = body.length;
+    const padding = toPadding(options.padding);
+    let height = padding.height;
+    let width = 0;
+    let combinedBodyLength = body.reduce((count, bodyItem)=>count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length, 0);
+    combinedBodyLength += tooltip.beforeBody.length + tooltip.afterBody.length;
+    if (titleLineCount) {
+        height += titleLineCount * titleFont.lineHeight + (titleLineCount - 1) * options.titleSpacing + options.titleMarginBottom;
+    }
+    if (combinedBodyLength) {
+        const bodyLineHeight = options.displayColors ? Math.max(boxHeight, bodyFont.lineHeight) : bodyFont.lineHeight;
+        height += bodyLineItemCount * bodyLineHeight + (combinedBodyLength - bodyLineItemCount) * bodyFont.lineHeight + (combinedBodyLength - 1) * options.bodySpacing;
+    }
+    if (footerLineCount) {
+        height += options.footerMarginTop + footerLineCount * footerFont.lineHeight + (footerLineCount - 1) * options.footerSpacing;
+    }
+    let widthPadding = 0;
+    const maxLineWidth = function(line) {
+        width = Math.max(width, ctx.measureText(line).width + widthPadding);
+    };
+    ctx.save();
+    ctx.font = titleFont.string;
+    each(tooltip.title, maxLineWidth);
+    ctx.font = bodyFont.string;
+    each(tooltip.beforeBody.concat(tooltip.afterBody), maxLineWidth);
+    widthPadding = options.displayColors ? boxWidth + 2 + options.boxPadding : 0;
+    each(body, (bodyItem)=>{
+        each(bodyItem.before, maxLineWidth);
+        each(bodyItem.lines, maxLineWidth);
+        each(bodyItem.after, maxLineWidth);
+    });
+    widthPadding = 0;
+    ctx.font = footerFont.string;
+    each(tooltip.footer, maxLineWidth);
+    ctx.restore();
+    width += padding.width;
+    return {
+        width,
+        height
+    };
+}
+function determineYAlign(chart, size) {
+    const { y , height  } = size;
+    if (y < height / 2) {
+        return 'top';
+    } else if (y > chart.height - height / 2) {
+        return 'bottom';
+    }
+    return 'center';
+}
+function doesNotFitWithAlign(xAlign, chart, options, size) {
+    const { x , width  } = size;
+    const caret = options.caretSize + options.caretPadding;
+    if (xAlign === 'left' && x + width + caret > chart.width) {
+        return true;
+    }
+    if (xAlign === 'right' && x - width - caret < 0) {
+        return true;
+    }
+}
+function determineXAlign(chart, options, size, yAlign) {
+    const { x , width  } = size;
+    const { width: chartWidth , chartArea: { left , right  }  } = chart;
+    let xAlign = 'center';
+    if (yAlign === 'center') {
+        xAlign = x <= (left + right) / 2 ? 'left' : 'right';
+    } else if (x <= width / 2) {
+        xAlign = 'left';
+    } else if (x >= chartWidth - width / 2) {
+        xAlign = 'right';
+    }
+    if (doesNotFitWithAlign(xAlign, chart, options, size)) {
+        xAlign = 'center';
+    }
+    return xAlign;
+}
+ function determineAlignment(chart, options, size) {
+    const yAlign = size.yAlign || options.yAlign || determineYAlign(chart, size);
+    return {
+        xAlign: size.xAlign || options.xAlign || determineXAlign(chart, options, size, yAlign),
+        yAlign
+    };
+}
+function alignX(size, xAlign) {
+    let { x , width  } = size;
+    if (xAlign === 'right') {
+        x -= width;
+    } else if (xAlign === 'center') {
+        x -= width / 2;
+    }
+    return x;
+}
+function alignY(size, yAlign, paddingAndSize) {
+    let { y , height  } = size;
+    if (yAlign === 'top') {
+        y += paddingAndSize;
+    } else if (yAlign === 'bottom') {
+        y -= height + paddingAndSize;
+    } else {
+        y -= height / 2;
+    }
+    return y;
+}
+ function getBackgroundPoint(options, size, alignment, chart) {
+    const { caretSize , caretPadding , cornerRadius  } = options;
+    const { xAlign , yAlign  } = alignment;
+    const paddingAndSize = caretSize + caretPadding;
+    const { topLeft , topRight , bottomLeft , bottomRight  } = toTRBLCorners(cornerRadius);
+    let x = alignX(size, xAlign);
+    const y = alignY(size, yAlign, paddingAndSize);
+    if (yAlign === 'center') {
+        if (xAlign === 'left') {
+            x += paddingAndSize;
+        } else if (xAlign === 'right') {
+            x -= paddingAndSize;
+        }
+    } else if (xAlign === 'left') {
+        x -= Math.max(topLeft, bottomLeft) + caretSize;
+    } else if (xAlign === 'right') {
+        x += Math.max(topRight, bottomRight) + caretSize;
+    }
+    return {
+        x: _limitValue(x, 0, chart.width - size.width),
+        y: _limitValue(y, 0, chart.height - size.height)
+    };
+}
+function getAlignedX(tooltip, align, options) {
+    const padding = toPadding(options.padding);
+    return align === 'center' ? tooltip.x + tooltip.width / 2 : align === 'right' ? tooltip.x + tooltip.width - padding.right : tooltip.x + padding.left;
+}
+ function getBeforeAfterBodyLines(callback) {
+    return pushOrConcat([], splitNewlines(callback));
+}
+function createTooltipContext(parent, tooltip, tooltipItems) {
+    return createContext(parent, {
+        tooltip,
+        tooltipItems,
+        type: 'tooltip'
+    });
+}
+function overrideCallbacks(callbacks, context) {
+    const override = context && context.dataset && context.dataset.tooltip && context.dataset.tooltip.callbacks;
+    return override ? callbacks.override(override) : callbacks;
+}
+const defaultCallbacks = {
+    beforeTitle: noop,
+    title (tooltipItems) {
+        if (tooltipItems.length > 0) {
+            const item = tooltipItems[0];
+            const labels = item.chart.data.labels;
+            const labelCount = labels ? labels.length : 0;
+            if (this && this.options && this.options.mode === 'dataset') {
+                return item.dataset.label || '';
+            } else if (item.label) {
+                return item.label;
+            } else if (labelCount > 0 && item.dataIndex < labelCount) {
+                return labels[item.dataIndex];
+            }
+        }
+        return '';
+    },
+    afterTitle: noop,
+    beforeBody: noop,
+    beforeLabel: noop,
+    label (tooltipItem) {
+        if (this && this.options && this.options.mode === 'dataset') {
+            return tooltipItem.label + ': ' + tooltipItem.formattedValue || tooltipItem.formattedValue;
+        }
+        let label = tooltipItem.dataset.label || '';
+        if (label) {
+            label += ': ';
+        }
+        const value = tooltipItem.formattedValue;
+        if (!isNullOrUndef(value)) {
+            label += value;
+        }
+        return label;
+    },
+    labelColor (tooltipItem) {
+        const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);
+        const options = meta.controller.getStyle(tooltipItem.dataIndex);
+        return {
+            borderColor: options.borderColor,
+            backgroundColor: options.backgroundColor,
+            borderWidth: options.borderWidth,
+            borderDash: options.borderDash,
+            borderDashOffset: options.borderDashOffset,
+            borderRadius: 0
+        };
+    },
+    labelTextColor () {
+        return this.options.bodyColor;
+    },
+    labelPointStyle (tooltipItem) {
+        const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);
+        const options = meta.controller.getStyle(tooltipItem.dataIndex);
+        return {
+            pointStyle: options.pointStyle,
+            rotation: options.rotation
+        };
+    },
+    afterLabel: noop,
+    afterBody: noop,
+    beforeFooter: noop,
+    footer: noop,
+    afterFooter: noop
+};
+ function invokeCallbackWithFallback(callbacks, name, ctx, arg) {
+    const result = callbacks[name].call(ctx, arg);
+    if (typeof result === 'undefined') {
+        return defaultCallbacks[name].call(ctx, arg);
+    }
+    return result;
+}
+class Tooltip extends Element {
+ static positioners = positioners;
+    constructor(config){
+        super();
+        this.opacity = 0;
+        this._active = [];
+        this._eventPosition = undefined;
+        this._size = undefined;
+        this._cachedAnimations = undefined;
+        this._tooltipItems = [];
+        this.$animations = undefined;
+        this.$context = undefined;
+        this.chart = config.chart;
+        this.options = config.options;
+        this.dataPoints = undefined;
+        this.title = undefined;
+        this.beforeBody = undefined;
+        this.body = undefined;
+        this.afterBody = undefined;
+        this.footer = undefined;
+        this.xAlign = undefined;
+        this.yAlign = undefined;
+        this.x = undefined;
+        this.y = undefined;
+        this.height = undefined;
+        this.width = undefined;
+        this.caretX = undefined;
+        this.caretY = undefined;
+        this.labelColors = undefined;
+        this.labelPointStyles = undefined;
+        this.labelTextColors = undefined;
+    }
+    initialize(options) {
+        this.options = options;
+        this._cachedAnimations = undefined;
+        this.$context = undefined;
+    }
+ _resolveAnimations() {
+        const cached = this._cachedAnimations;
+        if (cached) {
+            return cached;
+        }
+        const chart = this.chart;
+        const options = this.options.setContext(this.getContext());
+        const opts = options.enabled && chart.options.animation && options.animations;
+        const animations = new Animations(this.chart, opts);
+        if (opts._cacheable) {
+            this._cachedAnimations = Object.freeze(animations);
+        }
+        return animations;
+    }
+ getContext() {
+        return this.$context || (this.$context = createTooltipContext(this.chart.getContext(), this, this._tooltipItems));
+    }
+    getTitle(context, options) {
+        const { callbacks  } = options;
+        const beforeTitle = invokeCallbackWithFallback(callbacks, 'beforeTitle', this, context);
+        const title = invokeCallbackWithFallback(callbacks, 'title', this, context);
+        const afterTitle = invokeCallbackWithFallback(callbacks, 'afterTitle', this, context);
+        let lines = [];
+        lines = pushOrConcat(lines, splitNewlines(beforeTitle));
+        lines = pushOrConcat(lines, splitNewlines(title));
+        lines = pushOrConcat(lines, splitNewlines(afterTitle));
+        return lines;
+    }
+    getBeforeBody(tooltipItems, options) {
+        return getBeforeAfterBodyLines(invokeCallbackWithFallback(options.callbacks, 'beforeBody', this, tooltipItems));
+    }
+    getBody(tooltipItems, options) {
+        const { callbacks  } = options;
+        const bodyItems = [];
+        each(tooltipItems, (context)=>{
+            const bodyItem = {
+                before: [],
+                lines: [],
+                after: []
+            };
+            const scoped = overrideCallbacks(callbacks, context);
+            pushOrConcat(bodyItem.before, splitNewlines(invokeCallbackWithFallback(scoped, 'beforeLabel', this, context)));
+            pushOrConcat(bodyItem.lines, invokeCallbackWithFallback(scoped, 'label', this, context));
+            pushOrConcat(bodyItem.after, splitNewlines(invokeCallbackWithFallback(scoped, 'afterLabel', this, context)));
+            bodyItems.push(bodyItem);
+        });
+        return bodyItems;
+    }
+    getAfterBody(tooltipItems, options) {
+        return getBeforeAfterBodyLines(invokeCallbackWithFallback(options.callbacks, 'afterBody', this, tooltipItems));
+    }
+    getFooter(tooltipItems, options) {
+        const { callbacks  } = options;
+        const beforeFooter = invokeCallbackWithFallback(callbacks, 'beforeFooter', this, tooltipItems);
+        const footer = invokeCallbackWithFallback(callbacks, 'footer', this, tooltipItems);
+        const afterFooter = invokeCallbackWithFallback(callbacks, 'afterFooter', this, tooltipItems);
+        let lines = [];
+        lines = pushOrConcat(lines, splitNewlines(beforeFooter));
+        lines = pushOrConcat(lines, splitNewlines(footer));
+        lines = pushOrConcat(lines, splitNewlines(afterFooter));
+        return lines;
+    }
+ _createItems(options) {
+        const active = this._active;
+        const data = this.chart.data;
+        const labelColors = [];
+        const labelPointStyles = [];
+        const labelTextColors = [];
+        let tooltipItems = [];
+        let i, len;
+        for(i = 0, len = active.length; i < len; ++i){
+            tooltipItems.push(createTooltipItem(this.chart, active[i]));
+        }
+        if (options.filter) {
+            tooltipItems = tooltipItems.filter((element, index, array)=>options.filter(element, index, array, data));
+        }
+        if (options.itemSort) {
+            tooltipItems = tooltipItems.sort((a, b)=>options.itemSort(a, b, data));
+        }
+        each(tooltipItems, (context)=>{
+            const scoped = overrideCallbacks(options.callbacks, context);
+            labelColors.push(invokeCallbackWithFallback(scoped, 'labelColor', this, context));
+            labelPointStyles.push(invokeCallbackWithFallback(scoped, 'labelPointStyle', this, context));
+            labelTextColors.push(invokeCallbackWithFallback(scoped, 'labelTextColor', this, context));
+        });
+        this.labelColors = labelColors;
+        this.labelPointStyles = labelPointStyles;
+        this.labelTextColors = labelTextColors;
+        this.dataPoints = tooltipItems;
+        return tooltipItems;
+    }
+    update(changed, replay) {
+        const options = this.options.setContext(this.getContext());
+        const active = this._active;
+        let properties;
+        let tooltipItems = [];
+        if (!active.length) {
+            if (this.opacity !== 0) {
+                properties = {
+                    opacity: 0
+                };
+            }
+        } else {
+            const position = positioners[options.position].call(this, active, this._eventPosition);
+            tooltipItems = this._createItems(options);
+            this.title = this.getTitle(tooltipItems, options);
+            this.beforeBody = this.getBeforeBody(tooltipItems, options);
+            this.body = this.getBody(tooltipItems, options);
+            this.afterBody = this.getAfterBody(tooltipItems, options);
+            this.footer = this.getFooter(tooltipItems, options);
+            const size = this._size = getTooltipSize(this, options);
+            const positionAndSize = Object.assign({}, position, size);
+            const alignment = determineAlignment(this.chart, options, positionAndSize);
+            const backgroundPoint = getBackgroundPoint(options, positionAndSize, alignment, this.chart);
+            this.xAlign = alignment.xAlign;
+            this.yAlign = alignment.yAlign;
+            properties = {
+                opacity: 1,
+                x: backgroundPoint.x,
+                y: backgroundPoint.y,
+                width: size.width,
+                height: size.height,
+                caretX: position.x,
+                caretY: position.y
+            };
+        }
+        this._tooltipItems = tooltipItems;
+        this.$context = undefined;
+        if (properties) {
+            this._resolveAnimations().update(this, properties);
+        }
+        if (changed && options.external) {
+            options.external.call(this, {
+                chart: this.chart,
+                tooltip: this,
+                replay
+            });
+        }
+    }
+    drawCaret(tooltipPoint, ctx, size, options) {
+        const caretPosition = this.getCaretPosition(tooltipPoint, size, options);
+        ctx.lineTo(caretPosition.x1, caretPosition.y1);
+        ctx.lineTo(caretPosition.x2, caretPosition.y2);
+        ctx.lineTo(caretPosition.x3, caretPosition.y3);
+    }
+    getCaretPosition(tooltipPoint, size, options) {
+        const { xAlign , yAlign  } = this;
+        const { caretSize , cornerRadius  } = options;
+        const { topLeft , topRight , bottomLeft , bottomRight  } = toTRBLCorners(cornerRadius);
+        const { x: ptX , y: ptY  } = tooltipPoint;
+        const { width , height  } = size;
+        let x1, x2, x3, y1, y2, y3;
+        if (yAlign === 'center') {
+            y2 = ptY + height / 2;
+            if (xAlign === 'left') {
+                x1 = ptX;
+                x2 = x1 - caretSize;
+                y1 = y2 + caretSize;
+                y3 = y2 - caretSize;
+            } else {
+                x1 = ptX + width;
+                x2 = x1 + caretSize;
+                y1 = y2 - caretSize;
+                y3 = y2 + caretSize;
+            }
+            x3 = x1;
+        } else {
+            if (xAlign === 'left') {
+                x2 = ptX + Math.max(topLeft, bottomLeft) + caretSize;
+            } else if (xAlign === 'right') {
+                x2 = ptX + width - Math.max(topRight, bottomRight) - caretSize;
+            } else {
+                x2 = this.caretX;
+            }
+            if (yAlign === 'top') {
+                y1 = ptY;
+                y2 = y1 - caretSize;
+                x1 = x2 - caretSize;
+                x3 = x2 + caretSize;
+            } else {
+                y1 = ptY + height;
+                y2 = y1 + caretSize;
+                x1 = x2 + caretSize;
+                x3 = x2 - caretSize;
+            }
+            y3 = y1;
+        }
+        return {
+            x1,
+            x2,
+            x3,
+            y1,
+            y2,
+            y3
+        };
+    }
+    drawTitle(pt, ctx, options) {
+        const title = this.title;
+        const length = title.length;
+        let titleFont, titleSpacing, i;
+        if (length) {
+            const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
+            pt.x = getAlignedX(this, options.titleAlign, options);
+            ctx.textAlign = rtlHelper.textAlign(options.titleAlign);
+            ctx.textBaseline = 'middle';
+            titleFont = toFont(options.titleFont);
+            titleSpacing = options.titleSpacing;
+            ctx.fillStyle = options.titleColor;
+            ctx.font = titleFont.string;
+            for(i = 0; i < length; ++i){
+                ctx.fillText(title[i], rtlHelper.x(pt.x), pt.y + titleFont.lineHeight / 2);
+                pt.y += titleFont.lineHeight + titleSpacing;
+                if (i + 1 === length) {
+                    pt.y += options.titleMarginBottom - titleSpacing;
+                }
+            }
+        }
+    }
+ _drawColorBox(ctx, pt, i, rtlHelper, options) {
+        const labelColor = this.labelColors[i];
+        const labelPointStyle = this.labelPointStyles[i];
+        const { boxHeight , boxWidth  } = options;
+        const bodyFont = toFont(options.bodyFont);
+        const colorX = getAlignedX(this, 'left', options);
+        const rtlColorX = rtlHelper.x(colorX);
+        const yOffSet = boxHeight < bodyFont.lineHeight ? (bodyFont.lineHeight - boxHeight) / 2 : 0;
+        const colorY = pt.y + yOffSet;
+        if (options.usePointStyle) {
+            const drawOptions = {
+                radius: Math.min(boxWidth, boxHeight) / 2,
+                pointStyle: labelPointStyle.pointStyle,
+                rotation: labelPointStyle.rotation,
+                borderWidth: 1
+            };
+            const centerX = rtlHelper.leftForLtr(rtlColorX, boxWidth) + boxWidth / 2;
+            const centerY = colorY + boxHeight / 2;
+            ctx.strokeStyle = options.multiKeyBackground;
+            ctx.fillStyle = options.multiKeyBackground;
+            drawPoint(ctx, drawOptions, centerX, centerY);
+            ctx.strokeStyle = labelColor.borderColor;
+            ctx.fillStyle = labelColor.backgroundColor;
+            drawPoint(ctx, drawOptions, centerX, centerY);
+        } else {
+            ctx.lineWidth = isObject(labelColor.borderWidth) ? Math.max(...Object.values(labelColor.borderWidth)) : labelColor.borderWidth || 1;
+            ctx.strokeStyle = labelColor.borderColor;
+            ctx.setLineDash(labelColor.borderDash || []);
+            ctx.lineDashOffset = labelColor.borderDashOffset || 0;
+            const outerX = rtlHelper.leftForLtr(rtlColorX, boxWidth);
+            const innerX = rtlHelper.leftForLtr(rtlHelper.xPlus(rtlColorX, 1), boxWidth - 2);
+            const borderRadius = toTRBLCorners(labelColor.borderRadius);
+            if (Object.values(borderRadius).some((v)=>v !== 0)) {
+                ctx.beginPath();
+                ctx.fillStyle = options.multiKeyBackground;
+                addRoundedRectPath(ctx, {
+                    x: outerX,
+                    y: colorY,
+                    w: boxWidth,
+                    h: boxHeight,
+                    radius: borderRadius
+                });
+                ctx.fill();
+                ctx.stroke();
+                ctx.fillStyle = labelColor.backgroundColor;
+                ctx.beginPath();
+                addRoundedRectPath(ctx, {
+                    x: innerX,
+                    y: colorY + 1,
+                    w: boxWidth - 2,
+                    h: boxHeight - 2,
+                    radius: borderRadius
+                });
+                ctx.fill();
+            } else {
+                ctx.fillStyle = options.multiKeyBackground;
+                ctx.fillRect(outerX, colorY, boxWidth, boxHeight);
+                ctx.strokeRect(outerX, colorY, boxWidth, boxHeight);
+                ctx.fillStyle = labelColor.backgroundColor;
+                ctx.fillRect(innerX, colorY + 1, boxWidth - 2, boxHeight - 2);
+            }
+        }
+        ctx.fillStyle = this.labelTextColors[i];
+    }
+    drawBody(pt, ctx, options) {
+        const { body  } = this;
+        const { bodySpacing , bodyAlign , displayColors , boxHeight , boxWidth , boxPadding  } = options;
+        const bodyFont = toFont(options.bodyFont);
+        let bodyLineHeight = bodyFont.lineHeight;
+        let xLinePadding = 0;
+        const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
+        const fillLineOfText = function(line) {
+            ctx.fillText(line, rtlHelper.x(pt.x + xLinePadding), pt.y + bodyLineHeight / 2);
+            pt.y += bodyLineHeight + bodySpacing;
+        };
+        const bodyAlignForCalculation = rtlHelper.textAlign(bodyAlign);
+        let bodyItem, textColor, lines, i, j, ilen, jlen;
+        ctx.textAlign = bodyAlign;
+        ctx.textBaseline = 'middle';
+        ctx.font = bodyFont.string;
+        pt.x = getAlignedX(this, bodyAlignForCalculation, options);
+        ctx.fillStyle = options.bodyColor;
+        each(this.beforeBody, fillLineOfText);
+        xLinePadding = displayColors && bodyAlignForCalculation !== 'right' ? bodyAlign === 'center' ? boxWidth / 2 + boxPadding : boxWidth + 2 + boxPadding : 0;
+        for(i = 0, ilen = body.length; i < ilen; ++i){
+            bodyItem = body[i];
+            textColor = this.labelTextColors[i];
+            ctx.fillStyle = textColor;
+            each(bodyItem.before, fillLineOfText);
+            lines = bodyItem.lines;
+            if (displayColors && lines.length) {
+                this._drawColorBox(ctx, pt, i, rtlHelper, options);
+                bodyLineHeight = Math.max(bodyFont.lineHeight, boxHeight);
+            }
+            for(j = 0, jlen = lines.length; j < jlen; ++j){
+                fillLineOfText(lines[j]);
+                bodyLineHeight = bodyFont.lineHeight;
+            }
+            each(bodyItem.after, fillLineOfText);
+        }
+        xLinePadding = 0;
+        bodyLineHeight = bodyFont.lineHeight;
+        each(this.afterBody, fillLineOfText);
+        pt.y -= bodySpacing;
+    }
+    drawFooter(pt, ctx, options) {
+        const footer = this.footer;
+        const length = footer.length;
+        let footerFont, i;
+        if (length) {
+            const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);
+            pt.x = getAlignedX(this, options.footerAlign, options);
+            pt.y += options.footerMarginTop;
+            ctx.textAlign = rtlHelper.textAlign(options.footerAlign);
+            ctx.textBaseline = 'middle';
+            footerFont = toFont(options.footerFont);
+            ctx.fillStyle = options.footerColor;
+            ctx.font = footerFont.string;
+            for(i = 0; i < length; ++i){
+                ctx.fillText(footer[i], rtlHelper.x(pt.x), pt.y + footerFont.lineHeight / 2);
+                pt.y += footerFont.lineHeight + options.footerSpacing;
+            }
+        }
+    }
+    drawBackground(pt, ctx, tooltipSize, options) {
+        const { xAlign , yAlign  } = this;
+        const { x , y  } = pt;
+        const { width , height  } = tooltipSize;
+        const { topLeft , topRight , bottomLeft , bottomRight  } = toTRBLCorners(options.cornerRadius);
+        ctx.fillStyle = options.backgroundColor;
+        ctx.strokeStyle = options.borderColor;
+        ctx.lineWidth = options.borderWidth;
+        ctx.beginPath();
+        ctx.moveTo(x + topLeft, y);
+        if (yAlign === 'top') {
+            this.drawCaret(pt, ctx, tooltipSize, options);
+        }
+        ctx.lineTo(x + width - topRight, y);
+        ctx.quadraticCurveTo(x + width, y, x + width, y + topRight);
+        if (yAlign === 'center' && xAlign === 'right') {
+            this.drawCaret(pt, ctx, tooltipSize, options);
+        }
+        ctx.lineTo(x + width, y + height - bottomRight);
+        ctx.quadraticCurveTo(x + width, y + height, x + width - bottomRight, y + height);
+        if (yAlign === 'bottom') {
+            this.drawCaret(pt, ctx, tooltipSize, options);
+        }
+        ctx.lineTo(x + bottomLeft, y + height);
+        ctx.quadraticCurveTo(x, y + height, x, y + height - bottomLeft);
+        if (yAlign === 'center' && xAlign === 'left') {
+            this.drawCaret(pt, ctx, tooltipSize, options);
+        }
+        ctx.lineTo(x, y + topLeft);
+        ctx.quadraticCurveTo(x, y, x + topLeft, y);
+        ctx.closePath();
+        ctx.fill();
+        if (options.borderWidth > 0) {
+            ctx.stroke();
+        }
+    }
+ _updateAnimationTarget(options) {
+        const chart = this.chart;
+        const anims = this.$animations;
+        const animX = anims && anims.x;
+        const animY = anims && anims.y;
+        if (animX || animY) {
+            const position = positioners[options.position].call(this, this._active, this._eventPosition);
+            if (!position) {
+                return;
+            }
+            const size = this._size = getTooltipSize(this, options);
+            const positionAndSize = Object.assign({}, position, this._size);
+            const alignment = determineAlignment(chart, options, positionAndSize);
+            const point = getBackgroundPoint(options, positionAndSize, alignment, chart);
+            if (animX._to !== point.x || animY._to !== point.y) {
+                this.xAlign = alignment.xAlign;
+                this.yAlign = alignment.yAlign;
+                this.width = size.width;
+                this.height = size.height;
+                this.caretX = position.x;
+                this.caretY = position.y;
+                this._resolveAnimations().update(this, point);
+            }
+        }
+    }
+ _willRender() {
+        return !!this.opacity;
+    }
+    draw(ctx) {
+        const options = this.options.setContext(this.getContext());
+        let opacity = this.opacity;
+        if (!opacity) {
+            return;
+        }
+        this._updateAnimationTarget(options);
+        const tooltipSize = {
+            width: this.width,
+            height: this.height
+        };
+        const pt = {
+            x: this.x,
+            y: this.y
+        };
+        opacity = Math.abs(opacity) < 1e-3 ? 0 : opacity;
+        const padding = toPadding(options.padding);
+        const hasTooltipContent = this.title.length || this.beforeBody.length || this.body.length || this.afterBody.length || this.footer.length;
+        if (options.enabled && hasTooltipContent) {
+            ctx.save();
+            ctx.globalAlpha = opacity;
+            this.drawBackground(pt, ctx, tooltipSize, options);
+            overrideTextDirection(ctx, options.textDirection);
+            pt.y += padding.top;
+            this.drawTitle(pt, ctx, options);
+            this.drawBody(pt, ctx, options);
+            this.drawFooter(pt, ctx, options);
+            restoreTextDirection(ctx, options.textDirection);
+            ctx.restore();
+        }
+    }
+ getActiveElements() {
+        return this._active || [];
+    }
+ setActiveElements(activeElements, eventPosition) {
+        const lastActive = this._active;
+        const active = activeElements.map(({ datasetIndex , index  })=>{
+            const meta = this.chart.getDatasetMeta(datasetIndex);
+            if (!meta) {
+                throw new Error('Cannot find a dataset at index ' + datasetIndex);
+            }
+            return {
+                datasetIndex,
+                element: meta.data[index],
+                index
+            };
+        });
+        const changed = !_elementsEqual(lastActive, active);
+        const positionChanged = this._positionChanged(active, eventPosition);
+        if (changed || positionChanged) {
+            this._active = active;
+            this._eventPosition = eventPosition;
+            this._ignoreReplayEvents = true;
+            this.update(true);
+        }
+    }
+ handleEvent(e, replay, inChartArea = true) {
+        if (replay && this._ignoreReplayEvents) {
+            return false;
+        }
+        this._ignoreReplayEvents = false;
+        const options = this.options;
+        const lastActive = this._active || [];
+        const active = this._getActiveElements(e, lastActive, replay, inChartArea);
+        const positionChanged = this._positionChanged(active, e);
+        const changed = replay || !_elementsEqual(active, lastActive) || positionChanged;
+        if (changed) {
+            this._active = active;
+            if (options.enabled || options.external) {
+                this._eventPosition = {
+                    x: e.x,
+                    y: e.y
+                };
+                this.update(true, replay);
+            }
+        }
+        return changed;
+    }
+ _getActiveElements(e, lastActive, replay, inChartArea) {
+        const options = this.options;
+        if (e.type === 'mouseout') {
+            return [];
+        }
+        if (!inChartArea) {
+            return lastActive.filter((i)=>this.chart.data.datasets[i.datasetIndex] && this.chart.getDatasetMeta(i.datasetIndex).controller.getParsed(i.index) !== undefined);
+        }
+        const active = this.chart.getElementsAtEventForMode(e, options.mode, options, replay);
+        if (options.reverse) {
+            active.reverse();
+        }
+        return active;
+    }
+ _positionChanged(active, e) {
+        const { caretX , caretY , options  } = this;
+        const position = positioners[options.position].call(this, active, e);
+        return position !== false && (caretX !== position.x || caretY !== position.y);
+    }
+}
+var plugin_tooltip = {
+    id: 'tooltip',
+    _element: Tooltip,
+    positioners,
+    afterInit (chart, _args, options) {
+        if (options) {
+            chart.tooltip = new Tooltip({
+                chart,
+                options
+            });
+        }
+    },
+    beforeUpdate (chart, _args, options) {
+        if (chart.tooltip) {
+            chart.tooltip.initialize(options);
+        }
+    },
+    reset (chart, _args, options) {
+        if (chart.tooltip) {
+            chart.tooltip.initialize(options);
+        }
+    },
+    afterDraw (chart) {
+        const tooltip = chart.tooltip;
+        if (tooltip && tooltip._willRender()) {
+            const args = {
+                tooltip
+            };
+            if (chart.notifyPlugins('beforeTooltipDraw', {
+                ...args,
+                cancelable: true
+            }) === false) {
+                return;
+            }
+            tooltip.draw(chart.ctx);
+            chart.notifyPlugins('afterTooltipDraw', args);
+        }
+    },
+    afterEvent (chart, args) {
+        if (chart.tooltip) {
+            const useFinalPosition = args.replay;
+            if (chart.tooltip.handleEvent(args.event, useFinalPosition, args.inChartArea)) {
+                args.changed = true;
+            }
+        }
+    },
+    defaults: {
+        enabled: true,
+        external: null,
+        position: 'average',
+        backgroundColor: 'rgba(0,0,0,0.8)',
+        titleColor: '#fff',
+        titleFont: {
+            weight: 'bold'
+        },
+        titleSpacing: 2,
+        titleMarginBottom: 6,
+        titleAlign: 'left',
+        bodyColor: '#fff',
+        bodySpacing: 2,
+        bodyFont: {},
+        bodyAlign: 'left',
+        footerColor: '#fff',
+        footerSpacing: 2,
+        footerMarginTop: 6,
+        footerFont: {
+            weight: 'bold'
+        },
+        footerAlign: 'left',
+        padding: 6,
+        caretPadding: 2,
+        caretSize: 5,
+        cornerRadius: 6,
+        boxHeight: (ctx, opts)=>opts.bodyFont.size,
+        boxWidth: (ctx, opts)=>opts.bodyFont.size,
+        multiKeyBackground: '#fff',
+        displayColors: true,
+        boxPadding: 0,
+        borderColor: 'rgba(0,0,0,0)',
+        borderWidth: 0,
+        animation: {
+            duration: 400,
+            easing: 'easeOutQuart'
+        },
+        animations: {
+            numbers: {
+                type: 'number',
+                properties: [
+                    'x',
+                    'y',
+                    'width',
+                    'height',
+                    'caretX',
+                    'caretY'
+                ]
+            },
+            opacity: {
+                easing: 'linear',
+                duration: 200
+            }
+        },
+        callbacks: defaultCallbacks
+    },
+    defaultRoutes: {
+        bodyFont: 'font',
+        footerFont: 'font',
+        titleFont: 'font'
+    },
+    descriptors: {
+        _scriptable: (name)=>name !== 'filter' && name !== 'itemSort' && name !== 'external',
+        _indexable: false,
+        callbacks: {
+            _scriptable: false,
+            _indexable: false
+        },
+        animation: {
+            _fallback: false
+        },
+        animations: {
+            _fallback: 'animation'
+        }
+    },
+    additionalOptionScopes: [
+        'interaction'
+    ]
+};
+
+var plugins = /*#__PURE__*/Object.freeze({
+__proto__: null,
+Colors: plugin_colors,
+Decimation: plugin_decimation,
+Filler: index,
+Legend: plugin_legend,
+SubTitle: plugin_subtitle,
+Title: plugin_title,
+Tooltip: plugin_tooltip
+});
+
+const addIfString = (labels, raw, index, addedLabels)=>{
+    if (typeof raw === 'string') {
+        index = labels.push(raw) - 1;
+        addedLabels.unshift({
+            index,
+            label: raw
+        });
+    } else if (isNaN(raw)) {
+        index = null;
+    }
+    return index;
+};
+function findOrAddLabel(labels, raw, index, addedLabels) {
+    const first = labels.indexOf(raw);
+    if (first === -1) {
+        return addIfString(labels, raw, index, addedLabels);
+    }
+    const last = labels.lastIndexOf(raw);
+    return first !== last ? index : first;
+}
+const validIndex = (index, max)=>index === null ? null : _limitValue(Math.round(index), 0, max);
+function _getLabelForValue(value) {
+    const labels = this.getLabels();
+    if (value >= 0 && value < labels.length) {
+        return labels[value];
+    }
+    return value;
+}
+class CategoryScale extends Scale {
+    static id = 'category';
+ static defaults = {
+        ticks: {
+            callback: _getLabelForValue
+        }
+    };
+    constructor(cfg){
+        super(cfg);
+         this._startValue = undefined;
+        this._valueRange = 0;
+        this._addedLabels = [];
+    }
+    init(scaleOptions) {
+        const added = this._addedLabels;
+        if (added.length) {
+            const labels = this.getLabels();
+            for (const { index , label  } of added){
+                if (labels[index] === label) {
+                    labels.splice(index, 1);
+                }
+            }
+            this._addedLabels = [];
+        }
+        super.init(scaleOptions);
+    }
+    parse(raw, index) {
+        if (isNullOrUndef(raw)) {
+            return null;
+        }
+        const labels = this.getLabels();
+        index = isFinite(index) && labels[index] === raw ? index : findOrAddLabel(labels, raw, valueOrDefault(index, raw), this._addedLabels);
+        return validIndex(index, labels.length - 1);
+    }
+    determineDataLimits() {
+        const { minDefined , maxDefined  } = this.getUserBounds();
+        let { min , max  } = this.getMinMax(true);
+        if (this.options.bounds === 'ticks') {
+            if (!minDefined) {
+                min = 0;
+            }
+            if (!maxDefined) {
+                max = this.getLabels().length - 1;
+            }
+        }
+        this.min = min;
+        this.max = max;
+    }
+    buildTicks() {
+        const min = this.min;
+        const max = this.max;
+        const offset = this.options.offset;
+        const ticks = [];
+        let labels = this.getLabels();
+        labels = min === 0 && max === labels.length - 1 ? labels : labels.slice(min, max + 1);
+        this._valueRange = Math.max(labels.length - (offset ? 0 : 1), 1);
+        this._startValue = this.min - (offset ? 0.5 : 0);
+        for(let value = min; value <= max; value++){
+            ticks.push({
+                value
+            });
+        }
+        return ticks;
+    }
+    getLabelForValue(value) {
+        return _getLabelForValue.call(this, value);
+    }
+ configure() {
+        super.configure();
+        if (!this.isHorizontal()) {
+            this._reversePixels = !this._reversePixels;
+        }
+    }
+    getPixelForValue(value) {
+        if (typeof value !== 'number') {
+            value = this.parse(value);
+        }
+        return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);
+    }
+    getPixelForTick(index) {
+        const ticks = this.ticks;
+        if (index < 0 || index > ticks.length - 1) {
+            return null;
+        }
+        return this.getPixelForValue(ticks[index].value);
+    }
+    getValueForPixel(pixel) {
+        return Math.round(this._startValue + this.getDecimalForPixel(pixel) * this._valueRange);
+    }
+    getBasePixel() {
+        return this.bottom;
+    }
+}
+
+function generateTicks$1(generationOptions, dataRange) {
+    const ticks = [];
+    const MIN_SPACING = 1e-14;
+    const { bounds , step , min , max , precision , count , maxTicks , maxDigits , includeBounds  } = generationOptions;
+    const unit = step || 1;
+    const maxSpaces = maxTicks - 1;
+    const { min: rmin , max: rmax  } = dataRange;
+    const minDefined = !isNullOrUndef(min);
+    const maxDefined = !isNullOrUndef(max);
+    const countDefined = !isNullOrUndef(count);
+    const minSpacing = (rmax - rmin) / (maxDigits + 1);
+    let spacing = niceNum((rmax - rmin) / maxSpaces / unit) * unit;
+    let factor, niceMin, niceMax, numSpaces;
+    if (spacing < MIN_SPACING && !minDefined && !maxDefined) {
+        return [
+            {
+                value: rmin
+            },
+            {
+                value: rmax
+            }
+        ];
+    }
+    numSpaces = Math.ceil(rmax / spacing) - Math.floor(rmin / spacing);
+    if (numSpaces > maxSpaces) {
+        spacing = niceNum(numSpaces * spacing / maxSpaces / unit) * unit;
+    }
+    if (!isNullOrUndef(precision)) {
+        factor = Math.pow(10, precision);
+        spacing = Math.ceil(spacing * factor) / factor;
+    }
+    if (bounds === 'ticks') {
+        niceMin = Math.floor(rmin / spacing) * spacing;
+        niceMax = Math.ceil(rmax / spacing) * spacing;
+    } else {
+        niceMin = rmin;
+        niceMax = rmax;
+    }
+    if (minDefined && maxDefined && step && almostWhole((max - min) / step, spacing / 1000)) {
+        numSpaces = Math.round(Math.min((max - min) / spacing, maxTicks));
+        spacing = (max - min) / numSpaces;
+        niceMin = min;
+        niceMax = max;
+    } else if (countDefined) {
+        niceMin = minDefined ? min : niceMin;
+        niceMax = maxDefined ? max : niceMax;
+        numSpaces = count - 1;
+        spacing = (niceMax - niceMin) / numSpaces;
+    } else {
+        numSpaces = (niceMax - niceMin) / spacing;
+        if (almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {
+            numSpaces = Math.round(numSpaces);
+        } else {
+            numSpaces = Math.ceil(numSpaces);
+        }
+    }
+    const decimalPlaces = Math.max(_decimalPlaces(spacing), _decimalPlaces(niceMin));
+    factor = Math.pow(10, isNullOrUndef(precision) ? decimalPlaces : precision);
+    niceMin = Math.round(niceMin * factor) / factor;
+    niceMax = Math.round(niceMax * factor) / factor;
+    let j = 0;
+    if (minDefined) {
+        if (includeBounds && niceMin !== min) {
+            ticks.push({
+                value: min
+            });
+            if (niceMin < min) {
+                j++;
+            }
+            if (almostEquals(Math.round((niceMin + j * spacing) * factor) / factor, min, relativeLabelSize(min, minSpacing, generationOptions))) {
+                j++;
+            }
+        } else if (niceMin < min) {
+            j++;
+        }
+    }
+    for(; j < numSpaces; ++j){
+        const tickValue = Math.round((niceMin + j * spacing) * factor) / factor;
+        if (maxDefined && tickValue > max) {
+            break;
+        }
+        ticks.push({
+            value: tickValue
+        });
+    }
+    if (maxDefined && includeBounds && niceMax !== max) {
+        if (ticks.length && almostEquals(ticks[ticks.length - 1].value, max, relativeLabelSize(max, minSpacing, generationOptions))) {
+            ticks[ticks.length - 1].value = max;
+        } else {
+            ticks.push({
+                value: max
+            });
+        }
+    } else if (!maxDefined || niceMax === max) {
+        ticks.push({
+            value: niceMax
+        });
+    }
+    return ticks;
+}
+function relativeLabelSize(value, minSpacing, { horizontal , minRotation  }) {
+    const rad = toRadians(minRotation);
+    const ratio = (horizontal ? Math.sin(rad) : Math.cos(rad)) || 0.001;
+    const length = 0.75 * minSpacing * ('' + value).length;
+    return Math.min(minSpacing / ratio, length);
+}
+class LinearScaleBase extends Scale {
+    constructor(cfg){
+        super(cfg);
+         this.start = undefined;
+         this.end = undefined;
+         this._startValue = undefined;
+         this._endValue = undefined;
+        this._valueRange = 0;
+    }
+    parse(raw, index) {
+        if (isNullOrUndef(raw)) {
+            return null;
+        }
+        if ((typeof raw === 'number' || raw instanceof Number) && !isFinite(+raw)) {
+            return null;
+        }
+        return +raw;
+    }
+    handleTickRangeOptions() {
+        const { beginAtZero  } = this.options;
+        const { minDefined , maxDefined  } = this.getUserBounds();
+        let { min , max  } = this;
+        const setMin = (v)=>min = minDefined ? min : v;
+        const setMax = (v)=>max = maxDefined ? max : v;
+        if (beginAtZero) {
+            const minSign = sign(min);
+            const maxSign = sign(max);
+            if (minSign < 0 && maxSign < 0) {
+                setMax(0);
+            } else if (minSign > 0 && maxSign > 0) {
+                setMin(0);
+            }
+        }
+        if (min === max) {
+            let offset = max === 0 ? 1 : Math.abs(max * 0.05);
+            setMax(max + offset);
+            if (!beginAtZero) {
+                setMin(min - offset);
+            }
+        }
+        this.min = min;
+        this.max = max;
+    }
+    getTickLimit() {
+        const tickOpts = this.options.ticks;
+        let { maxTicksLimit , stepSize  } = tickOpts;
+        let maxTicks;
+        if (stepSize) {
+            maxTicks = Math.ceil(this.max / stepSize) - Math.floor(this.min / stepSize) + 1;
+            if (maxTicks > 1000) {
+                console.warn(`scales.${this.id}.ticks.stepSize: ${stepSize} would result generating up to ${maxTicks} ticks. Limiting to 1000.`);
+                maxTicks = 1000;
+            }
+        } else {
+            maxTicks = this.computeTickLimit();
+            maxTicksLimit = maxTicksLimit || 11;
+        }
+        if (maxTicksLimit) {
+            maxTicks = Math.min(maxTicksLimit, maxTicks);
+        }
+        return maxTicks;
+    }
+ computeTickLimit() {
+        return Number.POSITIVE_INFINITY;
+    }
+    buildTicks() {
+        const opts = this.options;
+        const tickOpts = opts.ticks;
+        let maxTicks = this.getTickLimit();
+        maxTicks = Math.max(2, maxTicks);
+        const numericGeneratorOptions = {
+            maxTicks,
+            bounds: opts.bounds,
+            min: opts.min,
+            max: opts.max,
+            precision: tickOpts.precision,
+            step: tickOpts.stepSize,
+            count: tickOpts.count,
+            maxDigits: this._maxDigits(),
+            horizontal: this.isHorizontal(),
+            minRotation: tickOpts.minRotation || 0,
+            includeBounds: tickOpts.includeBounds !== false
+        };
+        const dataRange = this._range || this;
+        const ticks = generateTicks$1(numericGeneratorOptions, dataRange);
+        if (opts.bounds === 'ticks') {
+            _setMinAndMaxByKey(ticks, this, 'value');
+        }
+        if (opts.reverse) {
+            ticks.reverse();
+            this.start = this.max;
+            this.end = this.min;
+        } else {
+            this.start = this.min;
+            this.end = this.max;
+        }
+        return ticks;
+    }
+ configure() {
+        const ticks = this.ticks;
+        let start = this.min;
+        let end = this.max;
+        super.configure();
+        if (this.options.offset && ticks.length) {
+            const offset = (end - start) / Math.max(ticks.length - 1, 1) / 2;
+            start -= offset;
+            end += offset;
+        }
+        this._startValue = start;
+        this._endValue = end;
+        this._valueRange = end - start;
+    }
+    getLabelForValue(value) {
+        return formatNumber(value, this.chart.options.locale, this.options.ticks.format);
+    }
+}
+
+class LinearScale extends LinearScaleBase {
+    static id = 'linear';
+ static defaults = {
+        ticks: {
+            callback: Ticks.formatters.numeric
+        }
+    };
+    determineDataLimits() {
+        const { min , max  } = this.getMinMax(true);
+        this.min = isNumberFinite(min) ? min : 0;
+        this.max = isNumberFinite(max) ? max : 1;
+        this.handleTickRangeOptions();
+    }
+ computeTickLimit() {
+        const horizontal = this.isHorizontal();
+        const length = horizontal ? this.width : this.height;
+        const minRotation = toRadians(this.options.ticks.minRotation);
+        const ratio = (horizontal ? Math.sin(minRotation) : Math.cos(minRotation)) || 0.001;
+        const tickFont = this._resolveTickFontOptions(0);
+        return Math.ceil(length / Math.min(40, tickFont.lineHeight / ratio));
+    }
+    getPixelForValue(value) {
+        return value === null ? NaN : this.getPixelForDecimal((value - this._startValue) / this._valueRange);
+    }
+    getValueForPixel(pixel) {
+        return this._startValue + this.getDecimalForPixel(pixel) * this._valueRange;
+    }
+}
+
+const log10Floor = (v)=>Math.floor(log10(v));
+const changeExponent = (v, m)=>Math.pow(10, log10Floor(v) + m);
+function isMajor(tickVal) {
+    const remain = tickVal / Math.pow(10, log10Floor(tickVal));
+    return remain === 1;
+}
+function steps(min, max, rangeExp) {
+    const rangeStep = Math.pow(10, rangeExp);
+    const start = Math.floor(min / rangeStep);
+    const end = Math.ceil(max / rangeStep);
+    return end - start;
+}
+function startExp(min, max) {
+    const range = max - min;
+    let rangeExp = log10Floor(range);
+    while(steps(min, max, rangeExp) > 10){
+        rangeExp++;
+    }
+    while(steps(min, max, rangeExp) < 10){
+        rangeExp--;
+    }
+    return Math.min(rangeExp, log10Floor(min));
+}
+ function generateTicks(generationOptions, { min , max  }) {
+    min = finiteOrDefault(generationOptions.min, min);
+    const ticks = [];
+    const minExp = log10Floor(min);
+    let exp = startExp(min, max);
+    let precision = exp < 0 ? Math.pow(10, Math.abs(exp)) : 1;
+    const stepSize = Math.pow(10, exp);
+    const base = minExp > exp ? Math.pow(10, minExp) : 0;
+    const start = Math.round((min - base) * precision) / precision;
+    const offset = Math.floor((min - base) / stepSize / 10) * stepSize * 10;
+    let significand = Math.floor((start - offset) / Math.pow(10, exp));
+    let value = finiteOrDefault(generationOptions.min, Math.round((base + offset + significand * Math.pow(10, exp)) * precision) / precision);
+    while(value < max){
+        ticks.push({
+            value,
+            major: isMajor(value),
+            significand
+        });
+        if (significand >= 10) {
+            significand = significand < 15 ? 15 : 20;
+        } else {
+            significand++;
+        }
+        if (significand >= 20) {
+            exp++;
+            significand = 2;
+            precision = exp >= 0 ? 1 : precision;
+        }
+        value = Math.round((base + offset + significand * Math.pow(10, exp)) * precision) / precision;
+    }
+    const lastTick = finiteOrDefault(generationOptions.max, value);
+    ticks.push({
+        value: lastTick,
+        major: isMajor(lastTick),
+        significand
+    });
+    return ticks;
+}
+class LogarithmicScale extends Scale {
+    static id = 'logarithmic';
+ static defaults = {
+        ticks: {
+            callback: Ticks.formatters.logarithmic,
+            major: {
+                enabled: true
+            }
+        }
+    };
+    constructor(cfg){
+        super(cfg);
+         this.start = undefined;
+         this.end = undefined;
+         this._startValue = undefined;
+        this._valueRange = 0;
+    }
+    parse(raw, index) {
+        const value = LinearScaleBase.prototype.parse.apply(this, [
+            raw,
+            index
+        ]);
+        if (value === 0) {
+            this._zero = true;
+            return undefined;
+        }
+        return isNumberFinite(value) && value > 0 ? value : null;
+    }
+    determineDataLimits() {
+        const { min , max  } = this.getMinMax(true);
+        this.min = isNumberFinite(min) ? Math.max(0, min) : null;
+        this.max = isNumberFinite(max) ? Math.max(0, max) : null;
+        if (this.options.beginAtZero) {
+            this._zero = true;
+        }
+        if (this._zero && this.min !== this._suggestedMin && !isNumberFinite(this._userMin)) {
+            this.min = min === changeExponent(this.min, 0) ? changeExponent(this.min, -1) : changeExponent(this.min, 0);
+        }
+        this.handleTickRangeOptions();
+    }
+    handleTickRangeOptions() {
+        const { minDefined , maxDefined  } = this.getUserBounds();
+        let min = this.min;
+        let max = this.max;
+        const setMin = (v)=>min = minDefined ? min : v;
+        const setMax = (v)=>max = maxDefined ? max : v;
+        if (min === max) {
+            if (min <= 0) {
+                setMin(1);
+                setMax(10);
+            } else {
+                setMin(changeExponent(min, -1));
+                setMax(changeExponent(max, +1));
+            }
+        }
+        if (min <= 0) {
+            setMin(changeExponent(max, -1));
+        }
+        if (max <= 0) {
+            setMax(changeExponent(min, +1));
+        }
+        this.min = min;
+        this.max = max;
+    }
+    buildTicks() {
+        const opts = this.options;
+        const generationOptions = {
+            min: this._userMin,
+            max: this._userMax
+        };
+        const ticks = generateTicks(generationOptions, this);
+        if (opts.bounds === 'ticks') {
+            _setMinAndMaxByKey(ticks, this, 'value');
+        }
+        if (opts.reverse) {
+            ticks.reverse();
+            this.start = this.max;
+            this.end = this.min;
+        } else {
+            this.start = this.min;
+            this.end = this.max;
+        }
+        return ticks;
+    }
+ getLabelForValue(value) {
+        return value === undefined ? '0' : formatNumber(value, this.chart.options.locale, this.options.ticks.format);
+    }
+ configure() {
+        const start = this.min;
+        super.configure();
+        this._startValue = log10(start);
+        this._valueRange = log10(this.max) - log10(start);
+    }
+    getPixelForValue(value) {
+        if (value === undefined || value === 0) {
+            value = this.min;
+        }
+        if (value === null || isNaN(value)) {
+            return NaN;
+        }
+        return this.getPixelForDecimal(value === this.min ? 0 : (log10(value) - this._startValue) / this._valueRange);
+    }
+    getValueForPixel(pixel) {
+        const decimal = this.getDecimalForPixel(pixel);
+        return Math.pow(10, this._startValue + decimal * this._valueRange);
+    }
+}
+
+function getTickBackdropHeight(opts) {
+    const tickOpts = opts.ticks;
+    if (tickOpts.display && opts.display) {
+        const padding = toPadding(tickOpts.backdropPadding);
+        return valueOrDefault(tickOpts.font && tickOpts.font.size, defaults.font.size) + padding.height;
+    }
+    return 0;
+}
+function measureLabelSize(ctx, font, label) {
+    label = isArray(label) ? label : [
+        label
+    ];
+    return {
+        w: _longestText(ctx, font.string, label),
+        h: label.length * font.lineHeight
+    };
+}
+function determineLimits(angle, pos, size, min, max) {
+    if (angle === min || angle === max) {
+        return {
+            start: pos - size / 2,
+            end: pos + size / 2
+        };
+    } else if (angle < min || angle > max) {
+        return {
+            start: pos - size,
+            end: pos
+        };
+    }
+    return {
+        start: pos,
+        end: pos + size
+    };
+}
+ function fitWithPointLabels(scale) {
+    const orig = {
+        l: scale.left + scale._padding.left,
+        r: scale.right - scale._padding.right,
+        t: scale.top + scale._padding.top,
+        b: scale.bottom - scale._padding.bottom
+    };
+    const limits = Object.assign({}, orig);
+    const labelSizes = [];
+    const padding = [];
+    const valueCount = scale._pointLabels.length;
+    const pointLabelOpts = scale.options.pointLabels;
+    const additionalAngle = pointLabelOpts.centerPointLabels ? PI / valueCount : 0;
+    for(let i = 0; i < valueCount; i++){
+        const opts = pointLabelOpts.setContext(scale.getPointLabelContext(i));
+        padding[i] = opts.padding;
+        const pointPosition = scale.getPointPosition(i, scale.drawingArea + padding[i], additionalAngle);
+        const plFont = toFont(opts.font);
+        const textSize = measureLabelSize(scale.ctx, plFont, scale._pointLabels[i]);
+        labelSizes[i] = textSize;
+        const angleRadians = _normalizeAngle(scale.getIndexAngle(i) + additionalAngle);
+        const angle = Math.round(toDegrees(angleRadians));
+        const hLimits = determineLimits(angle, pointPosition.x, textSize.w, 0, 180);
+        const vLimits = determineLimits(angle, pointPosition.y, textSize.h, 90, 270);
+        updateLimits(limits, orig, angleRadians, hLimits, vLimits);
+    }
+    scale.setCenterPoint(orig.l - limits.l, limits.r - orig.r, orig.t - limits.t, limits.b - orig.b);
+    scale._pointLabelItems = buildPointLabelItems(scale, labelSizes, padding);
+}
+function updateLimits(limits, orig, angle, hLimits, vLimits) {
+    const sin = Math.abs(Math.sin(angle));
+    const cos = Math.abs(Math.cos(angle));
+    let x = 0;
+    let y = 0;
+    if (hLimits.start < orig.l) {
+        x = (orig.l - hLimits.start) / sin;
+        limits.l = Math.min(limits.l, orig.l - x);
+    } else if (hLimits.end > orig.r) {
+        x = (hLimits.end - orig.r) / sin;
+        limits.r = Math.max(limits.r, orig.r + x);
+    }
+    if (vLimits.start < orig.t) {
+        y = (orig.t - vLimits.start) / cos;
+        limits.t = Math.min(limits.t, orig.t - y);
+    } else if (vLimits.end > orig.b) {
+        y = (vLimits.end - orig.b) / cos;
+        limits.b = Math.max(limits.b, orig.b + y);
+    }
+}
+function createPointLabelItem(scale, index, itemOpts) {
+    const outerDistance = scale.drawingArea;
+    const { extra , additionalAngle , padding , size  } = itemOpts;
+    const pointLabelPosition = scale.getPointPosition(index, outerDistance + extra + padding, additionalAngle);
+    const angle = Math.round(toDegrees(_normalizeAngle(pointLabelPosition.angle + HALF_PI)));
+    const y = yForAngle(pointLabelPosition.y, size.h, angle);
+    const textAlign = getTextAlignForAngle(angle);
+    const left = leftForTextAlign(pointLabelPosition.x, size.w, textAlign);
+    return {
+        visible: true,
+        x: pointLabelPosition.x,
+        y,
+        textAlign,
+        left,
+        top: y,
+        right: left + size.w,
+        bottom: y + size.h
+    };
+}
+function isNotOverlapped(item, area) {
+    if (!area) {
+        return true;
+    }
+    const { left , top , right , bottom  } = item;
+    const apexesInArea = _isPointInArea({
+        x: left,
+        y: top
+    }, area) || _isPointInArea({
+        x: left,
+        y: bottom
+    }, area) || _isPointInArea({
+        x: right,
+        y: top
+    }, area) || _isPointInArea({
+        x: right,
+        y: bottom
+    }, area);
+    return !apexesInArea;
+}
+function buildPointLabelItems(scale, labelSizes, padding) {
+    const items = [];
+    const valueCount = scale._pointLabels.length;
+    const opts = scale.options;
+    const { centerPointLabels , display  } = opts.pointLabels;
+    const itemOpts = {
+        extra: getTickBackdropHeight(opts) / 2,
+        additionalAngle: centerPointLabels ? PI / valueCount : 0
+    };
+    let area;
+    for(let i = 0; i < valueCount; i++){
+        itemOpts.padding = padding[i];
+        itemOpts.size = labelSizes[i];
+        const item = createPointLabelItem(scale, i, itemOpts);
+        items.push(item);
+        if (display === 'auto') {
+            item.visible = isNotOverlapped(item, area);
+            if (item.visible) {
+                area = item;
+            }
+        }
+    }
+    return items;
+}
+function getTextAlignForAngle(angle) {
+    if (angle === 0 || angle === 180) {
+        return 'center';
+    } else if (angle < 180) {
+        return 'left';
+    }
+    return 'right';
+}
+function leftForTextAlign(x, w, align) {
+    if (align === 'right') {
+        x -= w;
+    } else if (align === 'center') {
+        x -= w / 2;
+    }
+    return x;
+}
+function yForAngle(y, h, angle) {
+    if (angle === 90 || angle === 270) {
+        y -= h / 2;
+    } else if (angle > 270 || angle < 90) {
+        y -= h;
+    }
+    return y;
+}
+function drawPointLabelBox(ctx, opts, item) {
+    const { left , top , right , bottom  } = item;
+    const { backdropColor  } = opts;
+    if (!isNullOrUndef(backdropColor)) {
+        const borderRadius = toTRBLCorners(opts.borderRadius);
+        const padding = toPadding(opts.backdropPadding);
+        ctx.fillStyle = backdropColor;
+        const backdropLeft = left - padding.left;
+        const backdropTop = top - padding.top;
+        const backdropWidth = right - left + padding.width;
+        const backdropHeight = bottom - top + padding.height;
+        if (Object.values(borderRadius).some((v)=>v !== 0)) {
+            ctx.beginPath();
+            addRoundedRectPath(ctx, {
+                x: backdropLeft,
+                y: backdropTop,
+                w: backdropWidth,
+                h: backdropHeight,
+                radius: borderRadius
+            });
+            ctx.fill();
+        } else {
+            ctx.fillRect(backdropLeft, backdropTop, backdropWidth, backdropHeight);
+        }
+    }
+}
+function drawPointLabels(scale, labelCount) {
+    const { ctx , options: { pointLabels  }  } = scale;
+    for(let i = labelCount - 1; i >= 0; i--){
+        const item = scale._pointLabelItems[i];
+        if (!item.visible) {
+            continue;
+        }
+        const optsAtIndex = pointLabels.setContext(scale.getPointLabelContext(i));
+        drawPointLabelBox(ctx, optsAtIndex, item);
+        const plFont = toFont(optsAtIndex.font);
+        const { x , y , textAlign  } = item;
+        renderText(ctx, scale._pointLabels[i], x, y + plFont.lineHeight / 2, plFont, {
+            color: optsAtIndex.color,
+            textAlign: textAlign,
+            textBaseline: 'middle'
+        });
+    }
+}
+function pathRadiusLine(scale, radius, circular, labelCount) {
+    const { ctx  } = scale;
+    if (circular) {
+        ctx.arc(scale.xCenter, scale.yCenter, radius, 0, TAU);
+    } else {
+        let pointPosition = scale.getPointPosition(0, radius);
+        ctx.moveTo(pointPosition.x, pointPosition.y);
+        for(let i = 1; i < labelCount; i++){
+            pointPosition = scale.getPointPosition(i, radius);
+            ctx.lineTo(pointPosition.x, pointPosition.y);
+        }
+    }
+}
+function drawRadiusLine(scale, gridLineOpts, radius, labelCount, borderOpts) {
+    const ctx = scale.ctx;
+    const circular = gridLineOpts.circular;
+    const { color , lineWidth  } = gridLineOpts;
+    if (!circular && !labelCount || !color || !lineWidth || radius < 0) {
+        return;
+    }
+    ctx.save();
+    ctx.strokeStyle = color;
+    ctx.lineWidth = lineWidth;
+    ctx.setLineDash(borderOpts.dash || []);
+    ctx.lineDashOffset = borderOpts.dashOffset;
+    ctx.beginPath();
+    pathRadiusLine(scale, radius, circular, labelCount);
+    ctx.closePath();
+    ctx.stroke();
+    ctx.restore();
+}
+function createPointLabelContext(parent, index, label) {
+    return createContext(parent, {
+        label,
+        index,
+        type: 'pointLabel'
+    });
+}
+class RadialLinearScale extends LinearScaleBase {
+    static id = 'radialLinear';
+ static defaults = {
+        display: true,
+        animate: true,
+        position: 'chartArea',
+        angleLines: {
+            display: true,
+            lineWidth: 1,
+            borderDash: [],
+            borderDashOffset: 0.0
+        },
+        grid: {
+            circular: false
+        },
+        startAngle: 0,
+        ticks: {
+            showLabelBackdrop: true,
+            callback: Ticks.formatters.numeric
+        },
+        pointLabels: {
+            backdropColor: undefined,
+            backdropPadding: 2,
+            display: true,
+            font: {
+                size: 10
+            },
+            callback (label) {
+                return label;
+            },
+            padding: 5,
+            centerPointLabels: false
+        }
+    };
+    static defaultRoutes = {
+        'angleLines.color': 'borderColor',
+        'pointLabels.color': 'color',
+        'ticks.color': 'color'
+    };
+    static descriptors = {
+        angleLines: {
+            _fallback: 'grid'
+        }
+    };
+    constructor(cfg){
+        super(cfg);
+         this.xCenter = undefined;
+         this.yCenter = undefined;
+         this.drawingArea = undefined;
+         this._pointLabels = [];
+        this._pointLabelItems = [];
+    }
+    setDimensions() {
+        const padding = this._padding = toPadding(getTickBackdropHeight(this.options) / 2);
+        const w = this.width = this.maxWidth - padding.width;
+        const h = this.height = this.maxHeight - padding.height;
+        this.xCenter = Math.floor(this.left + w / 2 + padding.left);
+        this.yCenter = Math.floor(this.top + h / 2 + padding.top);
+        this.drawingArea = Math.floor(Math.min(w, h) / 2);
+    }
+    determineDataLimits() {
+        const { min , max  } = this.getMinMax(false);
+        this.min = isNumberFinite(min) && !isNaN(min) ? min : 0;
+        this.max = isNumberFinite(max) && !isNaN(max) ? max : 0;
+        this.handleTickRangeOptions();
+    }
+ computeTickLimit() {
+        return Math.ceil(this.drawingArea / getTickBackdropHeight(this.options));
+    }
+    generateTickLabels(ticks) {
+        LinearScaleBase.prototype.generateTickLabels.call(this, ticks);
+        this._pointLabels = this.getLabels().map((value, index)=>{
+            const label = callback(this.options.pointLabels.callback, [
+                value,
+                index
+            ], this);
+            return label || label === 0 ? label : '';
+        }).filter((v, i)=>this.chart.getDataVisibility(i));
+    }
+    fit() {
+        const opts = this.options;
+        if (opts.display && opts.pointLabels.display) {
+            fitWithPointLabels(this);
+        } else {
+            this.setCenterPoint(0, 0, 0, 0);
+        }
+    }
+    setCenterPoint(leftMovement, rightMovement, topMovement, bottomMovement) {
+        this.xCenter += Math.floor((leftMovement - rightMovement) / 2);
+        this.yCenter += Math.floor((topMovement - bottomMovement) / 2);
+        this.drawingArea -= Math.min(this.drawingArea / 2, Math.max(leftMovement, rightMovement, topMovement, bottomMovement));
+    }
+    getIndexAngle(index) {
+        const angleMultiplier = TAU / (this._pointLabels.length || 1);
+        const startAngle = this.options.startAngle || 0;
+        return _normalizeAngle(index * angleMultiplier + toRadians(startAngle));
+    }
+    getDistanceFromCenterForValue(value) {
+        if (isNullOrUndef(value)) {
+            return NaN;
+        }
+        const scalingFactor = this.drawingArea / (this.max - this.min);
+        if (this.options.reverse) {
+            return (this.max - value) * scalingFactor;
+        }
+        return (value - this.min) * scalingFactor;
+    }
+    getValueForDistanceFromCenter(distance) {
+        if (isNullOrUndef(distance)) {
+            return NaN;
+        }
+        const scaledDistance = distance / (this.drawingArea / (this.max - this.min));
+        return this.options.reverse ? this.max - scaledDistance : this.min + scaledDistance;
+    }
+    getPointLabelContext(index) {
+        const pointLabels = this._pointLabels || [];
+        if (index >= 0 && index < pointLabels.length) {
+            const pointLabel = pointLabels[index];
+            return createPointLabelContext(this.getContext(), index, pointLabel);
+        }
+    }
+    getPointPosition(index, distanceFromCenter, additionalAngle = 0) {
+        const angle = this.getIndexAngle(index) - HALF_PI + additionalAngle;
+        return {
+            x: Math.cos(angle) * distanceFromCenter + this.xCenter,
+            y: Math.sin(angle) * distanceFromCenter + this.yCenter,
+            angle
+        };
+    }
+    getPointPositionForValue(index, value) {
+        return this.getPointPosition(index, this.getDistanceFromCenterForValue(value));
+    }
+    getBasePosition(index) {
+        return this.getPointPositionForValue(index || 0, this.getBaseValue());
+    }
+    getPointLabelPosition(index) {
+        const { left , top , right , bottom  } = this._pointLabelItems[index];
+        return {
+            left,
+            top,
+            right,
+            bottom
+        };
+    }
+ drawBackground() {
+        const { backgroundColor , grid: { circular  }  } = this.options;
+        if (backgroundColor) {
+            const ctx = this.ctx;
+            ctx.save();
+            ctx.beginPath();
+            pathRadiusLine(this, this.getDistanceFromCenterForValue(this._endValue), circular, this._pointLabels.length);
+            ctx.closePath();
+            ctx.fillStyle = backgroundColor;
+            ctx.fill();
+            ctx.restore();
+        }
+    }
+ drawGrid() {
+        const ctx = this.ctx;
+        const opts = this.options;
+        const { angleLines , grid , border  } = opts;
+        const labelCount = this._pointLabels.length;
+        let i, offset, position;
+        if (opts.pointLabels.display) {
+            drawPointLabels(this, labelCount);
+        }
+        if (grid.display) {
+            this.ticks.forEach((tick, index)=>{
+                if (index !== 0 || index === 0 && this.min < 0) {
+                    offset = this.getDistanceFromCenterForValue(tick.value);
+                    const context = this.getContext(index);
+                    const optsAtIndex = grid.setContext(context);
+                    const optsAtIndexBorder = border.setContext(context);
+                    drawRadiusLine(this, optsAtIndex, offset, labelCount, optsAtIndexBorder);
+                }
+            });
+        }
+        if (angleLines.display) {
+            ctx.save();
+            for(i = labelCount - 1; i >= 0; i--){
+                const optsAtIndex = angleLines.setContext(this.getPointLabelContext(i));
+                const { color , lineWidth  } = optsAtIndex;
+                if (!lineWidth || !color) {
+                    continue;
+                }
+                ctx.lineWidth = lineWidth;
+                ctx.strokeStyle = color;
+                ctx.setLineDash(optsAtIndex.borderDash);
+                ctx.lineDashOffset = optsAtIndex.borderDashOffset;
+                offset = this.getDistanceFromCenterForValue(opts.reverse ? this.min : this.max);
+                position = this.getPointPosition(i, offset);
+                ctx.beginPath();
+                ctx.moveTo(this.xCenter, this.yCenter);
+                ctx.lineTo(position.x, position.y);
+                ctx.stroke();
+            }
+            ctx.restore();
+        }
+    }
+ drawBorder() {}
+ drawLabels() {
+        const ctx = this.ctx;
+        const opts = this.options;
+        const tickOpts = opts.ticks;
+        if (!tickOpts.display) {
+            return;
+        }
+        const startAngle = this.getIndexAngle(0);
+        let offset, width;
+        ctx.save();
+        ctx.translate(this.xCenter, this.yCenter);
+        ctx.rotate(startAngle);
+        ctx.textAlign = 'center';
+        ctx.textBaseline = 'middle';
+        this.ticks.forEach((tick, index)=>{
+            if (index === 0 && this.min >= 0 && !opts.reverse) {
+                return;
+            }
+            const optsAtIndex = tickOpts.setContext(this.getContext(index));
+            const tickFont = toFont(optsAtIndex.font);
+            offset = this.getDistanceFromCenterForValue(this.ticks[index].value);
+            if (optsAtIndex.showLabelBackdrop) {
+                ctx.font = tickFont.string;
+                width = ctx.measureText(tick.label).width;
+                ctx.fillStyle = optsAtIndex.backdropColor;
+                const padding = toPadding(optsAtIndex.backdropPadding);
+                ctx.fillRect(-width / 2 - padding.left, -offset - tickFont.size / 2 - padding.top, width + padding.width, tickFont.size + padding.height);
+            }
+            renderText(ctx, tick.label, 0, -offset, tickFont, {
+                color: optsAtIndex.color,
+                strokeColor: optsAtIndex.textStrokeColor,
+                strokeWidth: optsAtIndex.textStrokeWidth
+            });
+        });
+        ctx.restore();
+    }
+ drawTitle() {}
+}
+
+const INTERVALS = {
+    millisecond: {
+        common: true,
+        size: 1,
+        steps: 1000
+    },
+    second: {
+        common: true,
+        size: 1000,
+        steps: 60
+    },
+    minute: {
+        common: true,
+        size: 60000,
+        steps: 60
+    },
+    hour: {
+        common: true,
+        size: 3600000,
+        steps: 24
+    },
+    day: {
+        common: true,
+        size: 86400000,
+        steps: 30
+    },
+    week: {
+        common: false,
+        size: 604800000,
+        steps: 4
+    },
+    month: {
+        common: true,
+        size: 2.628e9,
+        steps: 12
+    },
+    quarter: {
+        common: false,
+        size: 7.884e9,
+        steps: 4
+    },
+    year: {
+        common: true,
+        size: 3.154e10
+    }
+};
+ const UNITS =  /* #__PURE__ */ Object.keys(INTERVALS);
+ function sorter(a, b) {
+    return a - b;
+}
+ function parse(scale, input) {
+    if (isNullOrUndef(input)) {
+        return null;
+    }
+    const adapter = scale._adapter;
+    const { parser , round , isoWeekday  } = scale._parseOpts;
+    let value = input;
+    if (typeof parser === 'function') {
+        value = parser(value);
+    }
+    if (!isNumberFinite(value)) {
+        value = typeof parser === 'string' ? adapter.parse(value, parser) : adapter.parse(value);
+    }
+    if (value === null) {
+        return null;
+    }
+    if (round) {
+        value = round === 'week' && (isNumber(isoWeekday) || isoWeekday === true) ? adapter.startOf(value, 'isoWeek', isoWeekday) : adapter.startOf(value, round);
+    }
+    return +value;
+}
+ function determineUnitForAutoTicks(minUnit, min, max, capacity) {
+    const ilen = UNITS.length;
+    for(let i = UNITS.indexOf(minUnit); i < ilen - 1; ++i){
+        const interval = INTERVALS[UNITS[i]];
+        const factor = interval.steps ? interval.steps : Number.MAX_SAFE_INTEGER;
+        if (interval.common && Math.ceil((max - min) / (factor * interval.size)) <= capacity) {
+            return UNITS[i];
+        }
+    }
+    return UNITS[ilen - 1];
+}
+ function determineUnitForFormatting(scale, numTicks, minUnit, min, max) {
+    for(let i = UNITS.length - 1; i >= UNITS.indexOf(minUnit); i--){
+        const unit = UNITS[i];
+        if (INTERVALS[unit].common && scale._adapter.diff(max, min, unit) >= numTicks - 1) {
+            return unit;
+        }
+    }
+    return UNITS[minUnit ? UNITS.indexOf(minUnit) : 0];
+}
+ function determineMajorUnit(unit) {
+    for(let i = UNITS.indexOf(unit) + 1, ilen = UNITS.length; i < ilen; ++i){
+        if (INTERVALS[UNITS[i]].common) {
+            return UNITS[i];
+        }
+    }
+}
+ function addTick(ticks, time, timestamps) {
+    if (!timestamps) {
+        ticks[time] = true;
+    } else if (timestamps.length) {
+        const { lo , hi  } = _lookup(timestamps, time);
+        const timestamp = timestamps[lo] >= time ? timestamps[lo] : timestamps[hi];
+        ticks[timestamp] = true;
+    }
+}
+ function setMajorTicks(scale, ticks, map, majorUnit) {
+    const adapter = scale._adapter;
+    const first = +adapter.startOf(ticks[0].value, majorUnit);
+    const last = ticks[ticks.length - 1].value;
+    let major, index;
+    for(major = first; major <= last; major = +adapter.add(major, 1, majorUnit)){
+        index = map[major];
+        if (index >= 0) {
+            ticks[index].major = true;
+        }
+    }
+    return ticks;
+}
+ function ticksFromTimestamps(scale, values, majorUnit) {
+    const ticks = [];
+     const map = {};
+    const ilen = values.length;
+    let i, value;
+    for(i = 0; i < ilen; ++i){
+        value = values[i];
+        map[value] = i;
+        ticks.push({
+            value,
+            major: false
+        });
+    }
+    return ilen === 0 || !majorUnit ? ticks : setMajorTicks(scale, ticks, map, majorUnit);
+}
+class TimeScale extends Scale {
+    static id = 'time';
+ static defaults = {
+ bounds: 'data',
+        adapters: {},
+        time: {
+            parser: false,
+            unit: false,
+            round: false,
+            isoWeekday: false,
+            minUnit: 'millisecond',
+            displayFormats: {}
+        },
+        ticks: {
+ source: 'auto',
+            callback: false,
+            major: {
+                enabled: false
+            }
+        }
+    };
+ constructor(props){
+        super(props);
+         this._cache = {
+            data: [],
+            labels: [],
+            all: []
+        };
+         this._unit = 'day';
+         this._majorUnit = undefined;
+        this._offsets = {};
+        this._normalized = false;
+        this._parseOpts = undefined;
+    }
+    init(scaleOpts, opts = {}) {
+        const time = scaleOpts.time || (scaleOpts.time = {});
+         const adapter = this._adapter = new adapters._date(scaleOpts.adapters.date);
+        adapter.init(opts);
+        mergeIf(time.displayFormats, adapter.formats());
+        this._parseOpts = {
+            parser: time.parser,
+            round: time.round,
+            isoWeekday: time.isoWeekday
+        };
+        super.init(scaleOpts);
+        this._normalized = opts.normalized;
+    }
+ parse(raw, index) {
+        if (raw === undefined) {
+            return null;
+        }
+        return parse(this, raw);
+    }
+    beforeLayout() {
+        super.beforeLayout();
+        this._cache = {
+            data: [],
+            labels: [],
+            all: []
+        };
+    }
+    determineDataLimits() {
+        const options = this.options;
+        const adapter = this._adapter;
+        const unit = options.time.unit || 'day';
+        let { min , max , minDefined , maxDefined  } = this.getUserBounds();
+ function _applyBounds(bounds) {
+            if (!minDefined && !isNaN(bounds.min)) {
+                min = Math.min(min, bounds.min);
+            }
+            if (!maxDefined && !isNaN(bounds.max)) {
+                max = Math.max(max, bounds.max);
+            }
+        }
+        if (!minDefined || !maxDefined) {
+            _applyBounds(this._getLabelBounds());
+            if (options.bounds !== 'ticks' || options.ticks.source !== 'labels') {
+                _applyBounds(this.getMinMax(false));
+            }
+        }
+        min = isNumberFinite(min) && !isNaN(min) ? min : +adapter.startOf(Date.now(), unit);
+        max = isNumberFinite(max) && !isNaN(max) ? max : +adapter.endOf(Date.now(), unit) + 1;
+        this.min = Math.min(min, max - 1);
+        this.max = Math.max(min + 1, max);
+    }
+ _getLabelBounds() {
+        const arr = this.getLabelTimestamps();
+        let min = Number.POSITIVE_INFINITY;
+        let max = Number.NEGATIVE_INFINITY;
+        if (arr.length) {
+            min = arr[0];
+            max = arr[arr.length - 1];
+        }
+        return {
+            min,
+            max
+        };
+    }
+ buildTicks() {
+        const options = this.options;
+        const timeOpts = options.time;
+        const tickOpts = options.ticks;
+        const timestamps = tickOpts.source === 'labels' ? this.getLabelTimestamps() : this._generate();
+        if (options.bounds === 'ticks' && timestamps.length) {
+            this.min = this._userMin || timestamps[0];
+            this.max = this._userMax || timestamps[timestamps.length - 1];
+        }
+        const min = this.min;
+        const max = this.max;
+        const ticks = _filterBetween(timestamps, min, max);
+        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));
+        this._majorUnit = !tickOpts.major.enabled || this._unit === 'year' ? undefined : determineMajorUnit(this._unit);
+        this.initOffsets(timestamps);
+        if (options.reverse) {
+            ticks.reverse();
+        }
+        return ticksFromTimestamps(this, ticks, this._majorUnit);
+    }
+    afterAutoSkip() {
+        if (this.options.offsetAfterAutoskip) {
+            this.initOffsets(this.ticks.map((tick)=>+tick.value));
+        }
+    }
+ initOffsets(timestamps = []) {
+        let start = 0;
+        let end = 0;
+        let first, last;
+        if (this.options.offset && timestamps.length) {
+            first = this.getDecimalForValue(timestamps[0]);
+            if (timestamps.length === 1) {
+                start = 1 - first;
+            } else {
+                start = (this.getDecimalForValue(timestamps[1]) - first) / 2;
+            }
+            last = this.getDecimalForValue(timestamps[timestamps.length - 1]);
+            if (timestamps.length === 1) {
+                end = last;
+            } else {
+                end = (last - this.getDecimalForValue(timestamps[timestamps.length - 2])) / 2;
+            }
+        }
+        const limit = timestamps.length < 3 ? 0.5 : 0.25;
+        start = _limitValue(start, 0, limit);
+        end = _limitValue(end, 0, limit);
+        this._offsets = {
+            start,
+            end,
+            factor: 1 / (start + 1 + end)
+        };
+    }
+ _generate() {
+        const adapter = this._adapter;
+        const min = this.min;
+        const max = this.max;
+        const options = this.options;
+        const timeOpts = options.time;
+        const minor = timeOpts.unit || determineUnitForAutoTicks(timeOpts.minUnit, min, max, this._getLabelCapacity(min));
+        const stepSize = valueOrDefault(options.ticks.stepSize, 1);
+        const weekday = minor === 'week' ? timeOpts.isoWeekday : false;
+        const hasWeekday = isNumber(weekday) || weekday === true;
+        const ticks = {};
+        let first = min;
+        let time, count;
+        if (hasWeekday) {
+            first = +adapter.startOf(first, 'isoWeek', weekday);
+        }
+        first = +adapter.startOf(first, hasWeekday ? 'day' : minor);
+        if (adapter.diff(max, min, minor) > 100000 * stepSize) {
+            throw new Error(min + ' and ' + max + ' are too far apart with stepSize of ' + stepSize + ' ' + minor);
+        }
+        const timestamps = options.ticks.source === 'data' && this.getDataTimestamps();
+        for(time = first, count = 0; time < max; time = +adapter.add(time, stepSize, minor), count++){
+            addTick(ticks, time, timestamps);
+        }
+        if (time === max || options.bounds === 'ticks' || count === 1) {
+            addTick(ticks, time, timestamps);
+        }
+        return Object.keys(ticks).sort(sorter).map((x)=>+x);
+    }
+ getLabelForValue(value) {
+        const adapter = this._adapter;
+        const timeOpts = this.options.time;
+        if (timeOpts.tooltipFormat) {
+            return adapter.format(value, timeOpts.tooltipFormat);
+        }
+        return adapter.format(value, timeOpts.displayFormats.datetime);
+    }
+ format(value, format) {
+        const options = this.options;
+        const formats = options.time.displayFormats;
+        const unit = this._unit;
+        const fmt = format || formats[unit];
+        return this._adapter.format(value, fmt);
+    }
+ _tickFormatFunction(time, index, ticks, format) {
+        const options = this.options;
+        const formatter = options.ticks.callback;
+        if (formatter) {
+            return callback(formatter, [
+                time,
+                index,
+                ticks
+            ], this);
+        }
+        const formats = options.time.displayFormats;
+        const unit = this._unit;
+        const majorUnit = this._majorUnit;
+        const minorFormat = unit && formats[unit];
+        const majorFormat = majorUnit && formats[majorUnit];
+        const tick = ticks[index];
+        const major = majorUnit && majorFormat && tick && tick.major;
+        return this._adapter.format(time, format || (major ? majorFormat : minorFormat));
+    }
+ generateTickLabels(ticks) {
+        let i, ilen, tick;
+        for(i = 0, ilen = ticks.length; i < ilen; ++i){
+            tick = ticks[i];
+            tick.label = this._tickFormatFunction(tick.value, i, ticks);
+        }
+    }
+ getDecimalForValue(value) {
+        return value === null ? NaN : (value - this.min) / (this.max - this.min);
+    }
+ getPixelForValue(value) {
+        const offsets = this._offsets;
+        const pos = this.getDecimalForValue(value);
+        return this.getPixelForDecimal((offsets.start + pos) * offsets.factor);
+    }
+ getValueForPixel(pixel) {
+        const offsets = this._offsets;
+        const pos = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;
+        return this.min + pos * (this.max - this.min);
+    }
+ _getLabelSize(label) {
+        const ticksOpts = this.options.ticks;
+        const tickLabelWidth = this.ctx.measureText(label).width;
+        const angle = toRadians(this.isHorizontal() ? ticksOpts.maxRotation : ticksOpts.minRotation);
+        const cosRotation = Math.cos(angle);
+        const sinRotation = Math.sin(angle);
+        const tickFontSize = this._resolveTickFontOptions(0).size;
+        return {
+            w: tickLabelWidth * cosRotation + tickFontSize * sinRotation,
+            h: tickLabelWidth * sinRotation + tickFontSize * cosRotation
+        };
+    }
+ _getLabelCapacity(exampleTime) {
+        const timeOpts = this.options.time;
+        const displayFormats = timeOpts.displayFormats;
+        const format = displayFormats[timeOpts.unit] || displayFormats.millisecond;
+        const exampleLabel = this._tickFormatFunction(exampleTime, 0, ticksFromTimestamps(this, [
+            exampleTime
+        ], this._majorUnit), format);
+        const size = this._getLabelSize(exampleLabel);
+        const capacity = Math.floor(this.isHorizontal() ? this.width / size.w : this.height / size.h) - 1;
+        return capacity > 0 ? capacity : 1;
+    }
+ getDataTimestamps() {
+        let timestamps = this._cache.data || [];
+        let i, ilen;
+        if (timestamps.length) {
+            return timestamps;
+        }
+        const metas = this.getMatchingVisibleMetas();
+        if (this._normalized && metas.length) {
+            return this._cache.data = metas[0].controller.getAllParsedValues(this);
+        }
+        for(i = 0, ilen = metas.length; i < ilen; ++i){
+            timestamps = timestamps.concat(metas[i].controller.getAllParsedValues(this));
+        }
+        return this._cache.data = this.normalize(timestamps);
+    }
+ getLabelTimestamps() {
+        const timestamps = this._cache.labels || [];
+        let i, ilen;
+        if (timestamps.length) {
+            return timestamps;
+        }
+        const labels = this.getLabels();
+        for(i = 0, ilen = labels.length; i < ilen; ++i){
+            timestamps.push(parse(this, labels[i]));
+        }
+        return this._cache.labels = this._normalized ? timestamps : this.normalize(timestamps);
+    }
+ normalize(values) {
+        return _arrayUnique(values.sort(sorter));
+    }
+}
+
+function interpolate(table, val, reverse) {
+    let lo = 0;
+    let hi = table.length - 1;
+    let prevSource, nextSource, prevTarget, nextTarget;
+    if (reverse) {
+        if (val >= table[lo].pos && val <= table[hi].pos) {
+            ({ lo , hi  } = _lookupByKey(table, 'pos', val));
+        }
+        ({ pos: prevSource , time: prevTarget  } = table[lo]);
+        ({ pos: nextSource , time: nextTarget  } = table[hi]);
+    } else {
+        if (val >= table[lo].time && val <= table[hi].time) {
+            ({ lo , hi  } = _lookupByKey(table, 'time', val));
+        }
+        ({ time: prevSource , pos: prevTarget  } = table[lo]);
+        ({ time: nextSource , pos: nextTarget  } = table[hi]);
+    }
+    const span = nextSource - prevSource;
+    return span ? prevTarget + (nextTarget - prevTarget) * (val - prevSource) / span : prevTarget;
+}
+class TimeSeriesScale extends TimeScale {
+    static id = 'timeseries';
+ static defaults = TimeScale.defaults;
+ constructor(props){
+        super(props);
+         this._table = [];
+         this._minPos = undefined;
+         this._tableRange = undefined;
+    }
+ initOffsets() {
+        const timestamps = this._getTimestampsForTable();
+        const table = this._table = this.buildLookupTable(timestamps);
+        this._minPos = interpolate(table, this.min);
+        this._tableRange = interpolate(table, this.max) - this._minPos;
+        super.initOffsets(timestamps);
+    }
+ buildLookupTable(timestamps) {
+        const { min , max  } = this;
+        const items = [];
+        const table = [];
+        let i, ilen, prev, curr, next;
+        for(i = 0, ilen = timestamps.length; i < ilen; ++i){
+            curr = timestamps[i];
+            if (curr >= min && curr <= max) {
+                items.push(curr);
+            }
+        }
+        if (items.length < 2) {
+            return [
+                {
+                    time: min,
+                    pos: 0
+                },
+                {
+                    time: max,
+                    pos: 1
+                }
+            ];
+        }
+        for(i = 0, ilen = items.length; i < ilen; ++i){
+            next = items[i + 1];
+            prev = items[i - 1];
+            curr = items[i];
+            if (Math.round((next + prev) / 2) !== curr) {
+                table.push({
+                    time: curr,
+                    pos: i / (ilen - 1)
+                });
+            }
+        }
+        return table;
+    }
+ _generate() {
+        const min = this.min;
+        const max = this.max;
+        let timestamps = super.getDataTimestamps();
+        if (!timestamps.includes(min) || !timestamps.length) {
+            timestamps.splice(0, 0, min);
+        }
+        if (!timestamps.includes(max) || timestamps.length === 1) {
+            timestamps.push(max);
+        }
+        return timestamps.sort((a, b)=>a - b);
+    }
+ _getTimestampsForTable() {
+        let timestamps = this._cache.all || [];
+        if (timestamps.length) {
+            return timestamps;
+        }
+        const data = this.getDataTimestamps();
+        const label = this.getLabelTimestamps();
+        if (data.length && label.length) {
+            timestamps = this.normalize(data.concat(label));
+        } else {
+            timestamps = data.length ? data : label;
+        }
+        timestamps = this._cache.all = timestamps;
+        return timestamps;
+    }
+ getDecimalForValue(value) {
+        return (interpolate(this._table, value) - this._minPos) / this._tableRange;
+    }
+ getValueForPixel(pixel) {
+        const offsets = this._offsets;
+        const decimal = this.getDecimalForPixel(pixel) / offsets.factor - offsets.end;
+        return interpolate(this._table, decimal * this._tableRange + this._minPos, true);
+    }
+}
+
+var scales = /*#__PURE__*/Object.freeze({
+__proto__: null,
+CategoryScale: CategoryScale,
+LinearScale: LinearScale,
+LogarithmicScale: LogarithmicScale,
+RadialLinearScale: RadialLinearScale,
+TimeScale: TimeScale,
+TimeSeriesScale: TimeSeriesScale
+});
+
+const registerables = [
+    controllers,
+    elements,
+    plugins,
+    scales
+];
+
+export { 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 };
+//# sourceMappingURL=chart.js.map