How to Use LegendClick to Toggle Legend Items in Angular Charts?

Description

This article demonstrates how to enable and disable legend items across multiple Angular charts using the legendClick event. It allows you to toggle the visibility of corresponding series across charts for synchronized interactivity.

Solution

In Angular charts, you can handle the legendClick event to toggle the visibility of a series by updating its visible property. When a legend item is clicked, the legendClick event is triggered, and you can access the clicked series via args.series.

To synchronize this behavior across multiple charts, you can apply the same visibility change to the corresponding series in the other chart(s).

Code Snippet

app.component.html

<ejs-chart #chart1 (legendClick)="legendClick($event)"></ejs-chart>
<ejs-chart #chart2 (legendClick)="legendClick1($event)"></ejs-chart>

app.component.ts

public legendClick(args: ILegendClickEventArgs): void {
   this.index = args.series.index;
   this.chart2.series[this.index].visible = args.series.visible ? false : true;
   this.chart2.refresh();
 }
 public legendClick1(args: ILegendClickEventArgs): void {
   this.index = args.series.index;
   this.chart1.series[this.index].visible = args.series.visible ? false : true;
   this.chart1.refresh();
 }

The following image illustrates the output of the above code.

View Sample in Stackblitz

Conclusion

We hope you enjoyed learning about How to use LegendClick to Toggle Legend Items in Angular Charts.

You can refer to our Angular Chart feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our Angular Chart example to understand how to create and manipulate data.

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