canGoBack method
Returns a boolean value indicating whether the WebView can move backward.
Official Android API: https://developer.android.com/reference/android/webkit/WebView#canGoBack()
Official iOS API: https://developer.apple.com/documentation/webkit/wkwebview/1414966-cangoback
Implementation
Future<bool> canGoBack() async {
Map<String, dynamic> args = <String, dynamic>{};
return await _channel.invokeMethod('canGoBack', args);
}