[Chartjs]-How to implement chart.js in Angular2

by

32👍

I had a similar issue, it turned out I was referencing an old example.

First, as you’ve already correctly done, install the library using NPM:

npm install chart.js --save

Then, in your component, import the library:

import Chart from 'chart.js';

To get up and running with a quick example, have a look at the example code in the Chart.js documentation or see my example below.

dashboard.component.ts

import Chart from 'chart.js';
import { ViewChild, Component, ElementRef, OnInit } from '@angular/core';

@Component({
    selector: 'app-dashboard',
    template: '<canvas #donut></canvas>'
})

export class DashboardComponent implements OnInit {
    @ViewChild('donut') donut: ElementRef;

    constructor(
    ) { }

    ngOnInit() {
        let donutCtx = this.donut.nativeElement.getContext('2d');

        var data = {
            labels: [
                "Value A",
                "Value B"
            ],
            datasets: [
                {
                    "data": [101342, 55342],   // Example data
                    "backgroundColor": [
                        "#1fc8f8",
                        "#76a346"
                    ]
                }]
        };

        var chart = new Chart(
            donutCtx,
            {
                "type": 'doughnut',
                "data": data,
                "options": {
                    "cutoutPercentage": 50,
                    "animation": {
                        "animateScale": true,
                        "animateRotate": false
                    }
                }
            }
        );
    }
}

22👍

In the template don’t forget to enclose canvas in a div.
If canvas is a direct child of custom directive in dom, then chart might not load.

<div><canvas id="myChart"></canvas></div>

I have wasted lot of time in finding this issue.

5👍

Here is the best module out of few on npmjs:

angular2-chartjs

Then you can use it like this in your module: 

import { ChartModule } from 'angular2-chartjs';

@NgModule({
  imports: [ ChartModule ]
  // ...
})
export class AppModule {
}

And in html template: 

<chart [type]="type" [data]="data" [options]="options"></chart>

Don’t forget to fill it with data 😉

2👍

If you are using webpack you may try adding the chart.js file (or the minified version) to the entry property as follows:

...
entry: {
      'chartJS': './node_modules/chart.js/dist/Chart.bundle.min.js',
      // Other mappings
}
...

1👍

I had this problem using <p-chart> primeNG.

Just add this in your index.html:

<script src= "https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.bundle.min.js" charset="utf-8"></script>

And that´s it, you don´t have to import in your typescript.

I found that in chart documentation

-then use a Chart.js CDN.

https://cdnjs.com/libraries/Chart.js

1👍

I tried. this works for me easy to implements
https://valor-software.com/ng2-charts/

Leave a comment