getProgress method
Gets the progress for the current page. The progress value is between 0 and 100.
Official Android API: https://developer.android.com/reference/android/webkit/WebView#getProgress()
Official iOS API: https://developer.apple.com/documentation/webkit/wkwebview/1415007-estimatedprogress
Implementation
Future<int?> getProgress() async {
Map<String, dynamic> args = <String, dynamic>{};
return await _channel.invokeMethod('getProgress', args);
}