Issue
I want to display a chart using chart.js in angular. In first time I try to implement a example took on the net and I have no problem during the compilation. This is the code in my .ts :
import { Component, OnInit } from '@angular/core';
import { Chart } from "chart.js";
@Component({
...
})
export class MyChartComponent implements OnInit {
constructor(){
}
ngOnInit(): void {
new Chart("myChart", {
type: 'bar',
data: {
labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)',
'rgba(75, 192, 192, 0.2)',
'rgba(153, 102, 255, 0.2)',
'rgba(255, 159, 64, 0.2)'
],
borderColor: [
'rgba(255, 99, 132, 1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)',
'rgba(153, 102, 255, 1)',
'rgba(255, 159, 64, 1)'
],
borderWidth: 1
}]
},
options: {
scales: {
y: {
beginAtZero: true
}
}
}
});
}
}
And in my .html I have :
<div id="divChart">
<canvas id="myChart"></canvas>
</div>
But when i start the serve, I have this error :
ERROR Error: "linear" is not a registered scale.
_get chart.esm.js:4622
getScale chart.esm.js:4576
buildOrUpdateScales chart.esm.js:5224
each helpers.segment.js:102
buildOrUpdateScales chart.esm.js:5211
update chart.esm.js:5336
Chart chart.esm.js:5096
ngOnInit my-chart.component.ts:32
Angular 37
zUnb main.ts:11
Webpack 6
ERROR TypeError: area is undefined
_isPointInArea helpers.segment.js:1266
getNearestItems chart.esm.js:2465
nearest chart.esm.js:2548
getElementsAtEventForMode chart.esm.js:5503
_handleEvent chart.esm.js:5737
_eventHandler chart.esm.js:5720
listener chart.esm.js:5617
proxy chart.esm.js:3022
throttled helpers.segment.js:28
Angular 17
throttled helpers.segment.js:26
Angular 14
addListener chart.esm.js:2905
createProxyAndListen chart.esm.js:3028
addEventListener chart.esm.js:3071
_add chart.esm.js:5605
bindEvents chart.esm.js:5619
each helpers.segment.js:102
bindEvents chart.esm.js:5619
_initialize chart.esm.js:5129
Chart chart.esm.js:5094
ngOnInit my-chart.component.ts:32
Angular 13
and many other errors. Can you help me please ?
Solution
Chart.js 3 is tree-shakeable, so it is necessary to import and register the controllers, elements, scales and plugins you are going to use.
Please take a look at Bundlers (Webpack, Rollup, etc.) from the Chart.js documentation.
In your case, this could be done as follows ():
import { Chart, BarElement, BarController, CategoryScale, Decimation, Filler, Legend, Title, Tooltip} from 'chart.js';
export class MyChartComponent implements OnInit {
constructor() {
Chart.register(BarElement, BarController, CategoryScale, Decimation, Filler, Legend, Title, Tooltip);
}
...
}
Answered By - uminder
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