postWebMessage method

  1. @override
Future<void> postWebMessage({
  1. required WebMessage message,
  2. WebUri? targetOrigin,
})

Post a message to main frame. The embedded application can restrict the messages to a certain target origin. See HTML5 spec for how target origin can be used.

A target origin can be set as a wildcard ("*"). However this is not recommended.

NOTE for Android native WebView: This method should only be called if WebViewFeature.isFeatureSupported returns true for WebViewFeature.POST_WEB_MESSAGE.

NOTE for iOS: it is implemented using JavaScript.

NOTE for MacOS: it is implemented using JavaScript.

Officially Supported Platforms/Implementations:

Implementation

@override
Future<void> postWebMessage(
    {required WebMessage message, WebUri? targetOrigin}) async {
  if (targetOrigin == null) {
    targetOrigin = WebUri('');
  }
  Map<String, dynamic> args = <String, dynamic>{};
  args.putIfAbsent('message', () => message.toMap());
  args.putIfAbsent('targetOrigin', () => targetOrigin.toString());
  await channel?.invokeMethod('postWebMessage', args);
}