OptionalMethodChannel hangs on the web #66380
Description
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() {
runApp(TestApp());
}
class TestApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Center(
child: RaisedButton(
onPressed: () {
print('calling method');
OptionalMethodChannel('foo').invokeMethod('bar').then((_) {
print('Done');
});
},
child: Text('push'),
),
),
),
);
}
}When calling a method channel, that's not implemented on the native side, OptionalMethodChannels are documented to return null. This works as expected on mobile. However, on the web, the code above just hangs.
This is a problem for apps that use state restoration, which relies on the fact that if the platform is not implementing the state restoration channel, state restoration is turned off.
/cc @yjbanov