How to Change Series Data on Chart Legend Click in Angular Chart?

This article explains how to dynamically update the data source of a specific series in one chart when a legend item is clicked in another chart in Angular Chart.

When a legend item is clicked, the legendClick event provides the legend text and the corresponding data points. You can use this information to update the data source of a series in another chart instance.

Code Example

app.component.html

<ejs-chart #chart  (legendClick)='legendClick($event)'>
           <e-series-collection>
               <e-series [dataSource]='data' type='Column' xName='x' yName='y' name='Gold' width=2 [marker]='marker'> </e-series>
               <e-series [dataSource]='data1' type='Column' xName='x' yName='y' name='Silver' width=2 [marker]='marker'> </e-series>
               <e-series [dataSource]='data2' type='Column' xName='x' yName='y' name='Bronze' width=2 [marker]='marker'> </e-series>
           </e-series-collection>
       </ejs-chart>
       <ejs-chart #chart1>
       <e-series-collection>
           <e-series [dataSource]='data2' type='Column' xName='x' yName='y' name='Gold' width=2 [marker]='marker'> </e-series>
           <e-series [dataSource]='data' type='Column' xName='x' yName='y' name='Silver' width=2 [marker]='marker'> </e-series>
           <e-series [dataSource]='data1' type='Column' xName='x' yName='y' name='Bronze' width=2 [marker]='marker'> </e-series>
       </e-series-collection>
   </ejs-chart> 

app.component.ts

public legendClick(args: ILegendClickEventArgs): void {
   if (args.legendText == 'Gold')
     this.chart1.series[0].dataSource = args.points;
 } 

Screenshot

Before Legend Click

After Legend Click

Sample

StackBlitz Sample

Conclusion

I hope you enjoyed learning about how to change series data on Chart legend click in Angular Chart.

You can refer to our Angular Chart’s feature tour page to learn about its other groundbreaking feature representations. You can also explore our Angular Chart Documentation to understand how to present and manipulate data.

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