How to zoom charts in chart.js using angular?

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by daisha , in category: Javascript , 2 months ago

How to zoom charts in chart.js using angular?

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1 answer

by tressie.damore , 2 months ago

@daisha 

To zoom charts in Chart.js using Angular, you can use the Chart.js zoom plugin. Here's how you can do it:

  1. Install the Chart.js zoom plugin by running the following command in your Angular project directory:
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npm install chartjs-plugin-zoom --save


  1. Import the zoom plugin in your Angular component where you are using the Chart.js chart:
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import 'chartjs-plugin-zoom';


  1. Add the zoom plugin options to your Chart.js chart configuration. Here's an example of configuring the zoom options in an Angular component:
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// Import necessary modules
import { Component, OnInit } from '@angular/core';

// Define the component
@Component({
  selector: 'app-my-chart',
  templateUrl: './my-chart.component.html',
  styleUrls: ['./my-chart.component.css']
})
export class MyChartComponent implements OnInit {
  chartOptions = {
    scales: {
      x: {
        type: 'linear'
      }
    },
    plugins: {
      zoom: {
        pan: {
          enabled: true,
          mode: 'xy'
        },
        zoom: {
          wheel: {
            enabled: true,
          },
          pinch: {
            enabled: true
          },
          mode: 'xy',
        }
      }
    }
  };

  // Other chart configurations and data
}


  1. Add the Chart.js chart element in your HTML template file with the chart options you defined:
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<canvas baseChart
     [datasets]="barChartData"
     [labels]="barChartLabels"
     [options]="chartOptions"
     [legend]="barChartLegend"
     [plugins]="[plugin_zoom]"
     [chartType]="'bar'">
</canvas>


  1. Now, you should be able to zoom in and out of the Chart.js chart using the scroll wheel or pinch gesture on touch devices. You can also pan the chart by clicking and dragging on the chart area.


By following these steps, you can easily zoom charts in Chart.js using Angular.