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Keep Instances intact when cloning datasets on update #135

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Keep Instances intact when cloning datasets on update #135

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11 changes: 9 additions & 2 deletions src/core/component.builder.ts
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
import type { Chart, ChartData, ChartDataset, ChartOptions, ChartType, Plugin } from 'chart.js';
import * as Chartjs from 'chart.js';
import { cloneDeep, isEmpty, isEqual, isObject } from 'lodash-es';
import { cloneDeep, cloneDeepWith, isEmpty, isEqual, isObject, isArray } from 'lodash-es';
import { pascalCase } from '../utils';
import {
ComponentOptionsMixin,
@@ -121,7 +121,14 @@ export const defineChartComponent = <TType extends ChartType = ChartType>(

// Update attributes individually to avoid re-rendering the entire chart
for (const attribute in dataset) {
const attrValue = cloneDeep(dataset[attribute as keyof ChartDataset]);
function keepInstancesIntactCloneCustomizer<T extends unknown>(value: T): T|undefined {
if(!isObject(value)) return;
if(value.constructor.name === 'Object') return;
if(isArray(value)) return;
return value;
}

const attrValue = cloneDeepWith(dataset[attribute as keyof ChartDataset], keepInstancesIntactCloneCustomizer);
let datasetItem = chart.data.datasets[index] as any;
if (!datasetItem) {
chart.data.datasets[index] = {} as any;