on<T> method
Implementation
Future<void> on<T>(
String javaScriptEvent, HighchartsCallbackDart<T> callback) async {
if (_events[javaScriptEvent] == null) {
_events[javaScriptEvent] = [];
}
_events[javaScriptEvent]!.add(callback);
await webViewController
.runJavaScript('highcharts_flutter.on($javaScriptEvent);');
}