How do I use plugins in ng2-charts?

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I'm not sure how exactly to import a plugin into ng2-charts, specifically the annotation plugin. I'm using Angular2 / Ionic2. There doesn't seem to be any documentation or answers on this.

I would avoid to declare Chart like this. Instead you can do import {Chart} from 'chart.js' since it is a subdependency of ng2-charts anyway.

By this approach your IDE can still do autocompletion and you are not telling angular to just believe that there is something called Chart.

To be consistent you should also add it to your package.json.

How to use Chart.plugins with Ng2-chart? � Issue #496 � valor , exemple: Chart.pluginService.register({ beforeDraw: function(chart) { var width = chart.chart.width, height = chart.chart.height,� Dismiss Join GitHub today. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Maybe follow this thread (https://github.com/valor-software/ng2-charts/issues/496) in case there becomes a more "official" way, but here is what I did:

At the top of your component:

declare var Chart: any;

That will stop TypeScript from complaining and give you access to the Chart object.

Then you can use:

Chart.pluginService.register

Here's an example of code for a plugin that I was using: https://github.com/chartjs/Chart.js/issues/78#issuecomment-220829079

Update (May 2018): This answer is likely not valid or the best way to do this anymore.

Ng2-Charts does not provide a mechanism to add plugins to , Why not add support for passing in plugins to use as part of the chart creation? I see an open PR for adding global plugins, but nothing for just� Is there any clean ‘angular-way’ to add this plugin in ng2-charts? EDIT: Judging from the documentation, I could define what the plugin can do in the following ways… var plugin = { /* plugin implementation */ }; And then calling this plugin in the options of the chart or globally… Chart.plugins.register({ // plugin implementation });

for example drawing in center of doughnut chart i find workaround using it in options animation, so no need to refister a plugin

    animation: {
      onProgress: function(chart) {
        let width = chart.chart.width,
          height = chart.chart.height,
          ctx = chart.chart.ctx;

        ctx.restore();
        let fontSize = (height / 114).toFixed(2);
        ctx.font = fontSize + "em sans-serif";
        ctx.textBaseline = "middle";
        ctx.fillStyle = '#dddddd';

        let text = "75%",
          textX = Math.round((width - ctx.measureText(text).width) / 2),
          textY = height / 2;

        ctx.fillText(text, textX, textY);
        ctx.save();
      },
      onComplete: function(chart) {
        let width = chart.chart.width,
          height = chart.chart.height,
          ctx = chart.chart.ctx;

        ctx.restore();
        let fontSize = (height / 114).toFixed(2);
        ctx.font = fontSize + "em sans-serif";
        ctx.textBaseline = "middle";
        ctx.fillStyle = '#dddddd';

        let text = "75%",
          textX = Math.round((width - ctx.measureText(text).width) / 2),
          textY = height / 2;

        ctx.fillText(text, textX, textY);
        ctx.save();
      },
    },

Ng2-Charts, Installation. Installation. Install ng2-charts using npm. npm install --save ng2- charts. Install Chart.js library. npm install --save chart.js� It takes data in the JSON form, so it is merely simple to use it with any programming language. Introduction to ng2-charts. The ng2-charts module is an open-source JavaScript library, and it is exclusively built for Angular 2+ and available via npm. It helps to create eye-catching charts in Angular with the help of Chart.js.

ng2-charts-bar-labels, import { Label } from 'ng2-charts';. @Component({ responsive: true,. // We use these empty structures as public barChartPlugins = [pluginDataLabels];. Schematics in Angular 9 are code generators that can create components and patterns in projects using predetermined templates and layouts. In this article, Zara Cooper explains how to take advantage of schematics in Angular Material and ng2-charts to substantially reduce the time and work that goes into building a dashboard.

Popular Extensions � Chart.js documentation, In addition, many plugins can be found on the npm registry. Integrations. Angular (v2+). emn178/angular2-chartjs � valor-software/ng2-charts. Angular (v1). Ng2-Charts does not provide a mechanism to add plugins to underlying chart.js instance. #752 grahammutter opened this issue Apr 20, 2017 · 13 comments grahammutter commented Apr 20, 2017 Some of the beauty of chart.js is how extensible it's behaviors are with feature plugins, which currently cannot be set via ng2-charts.

Angular 8|9 Chart.js Tutorial with ng2-charts Examples, We will use ng2-charts along with the Chart js library in our Angular application to show the various charts. npm install ng2-charts chart.js --save. 'chartjs-plugin-labels' is the most popular display plugin. I just tried it. It works! npm install chartjs-plugin-labels --save In the desired angular 2+ component, add the following:

Comments
  • Would be nice if you mark this answer as the accepted answer
  • I can confirm this works on angular2+, just added the Chart.pluginService.register({}) definition at the bottom of my component that imports ng2-charts
  • How can i register plugin for just this one chart using this approach?
  • This isn't working. import {Chart} from 'chart.js' works