postMessage method
Sends a postMessage request using the origin communicated via requestPostMessageChannel. Fails when called before PlatformChromeSafariBrowserEvents.onMessageChannelReady event.
message
– The message that is being sent.
Returns an integer constant about the postMessage request result. Will return CustomTabsService.RESULT_SUCCESS if successful.
Officially Supported Platforms/Implementations:
Implementation
Future<CustomTabsPostMessageResultType> postMessage(String message) {
throw UnimplementedError(
'postMessage is not implemented on the current platform');
}