Merge pull request #3701 from NoelDeMartin/MOBILE-4273

[4.3] MOBILE-4273 core: Lazy-load ChartJS

src/core/components/chart/chart.lazy.ts

@@ -0,0 +1,15 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+export { Chart } from 'chart.js';

src/core/components/chart/chart.ts

@@ -16,7 +16,7 @@ import { Component, Input, OnDestroy, OnInit, ElementRef, OnChanges, ViewChild,
 import { CoreFilter } from '@features/filter/services/filter';
 import { CoreFilterHelper } from '@features/filter/services/filter-helper';
 import { CoreUtils } from '@services/utils/utils';
-import { Chart, ChartLegendLabelItem, ChartLegendOptions } from 'chart.js';
+import { ChartLegendLabelItem, ChartLegendOptions } from 'chart.js';
 
 /**
  * This component shows a chart using chart.js.
@@ -99,6 +99,8 @@ export class CoreChartComponent implements OnDestroy, OnInit, OnChanges {
             return;
         }
 
+        const { Chart } = await import('./chart.lazy');
+
         this.chart = new Chart(context, {
             type: this.type,
             data: {