How to Highlight a Marker in Multicolored Line Series in React Chart?

This article demonstrates how to selectively display a single marker in a multicolored line chart using React Charts. You can use the pointRender event to cancel rendering for all points except the one you want to highlight. In the sample below, the specific point is highlighted when args.point.index equals 20, and a fill color is applied. All other points are hidden by cancelling the point render event.

Code Example

const pointRender = (args) => {
   if (args.point.index === 20) {
     args.fill = 'red';
   } else {
     args.cancel = true;
   }
 };
 return (
   <div className="control-pane">
       <ChartComponent
         id="charts"
         pointRender={pointRender}
       >
         <SeriesCollectionDirective>
           <SeriesDirective
             dataSource={chartValues}
             xName="XValue"
             width={2}
             yName="YValue"
             name="Risks"
             type="MultiColoredLine"
             segmentAxis="Y"
             marker={{ visible: true, width: 15, height: 15 }}
           >
             <SegmentsDirective>
               <SegmentDirective value={35} color="green"></SegmentDirective>
               <SegmentDirective value={45} color="orange"></SegmentDirective>
               <SegmentDirective color="red"></SegmentDirective>
             </SegmentsDirective>
           </SeriesDirective>
         </SeriesCollectionDirective>
       </ChartComponent>
   </div>
 ); 

Output

Live Sample

StackBlitz Sample

Conclusion

I hope you enjoyed learning about how to highlight a marker in multicolored line series in React Chart.

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

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