borderWidth property

double borderWidth
final

Customizes the border width of the marker.

Defaults to 2.

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: Center(
       child: SfSparkAreaChart(
      marker: SparkChartMarker(
         borderWidth: 3),
        )
     ),
  );
}

Implementation

final double borderWidth;