小编jan*_*nik的帖子

颤振测试小部件：

// ignore: avoid_web_libraries_in_flutter
import 'dart:html' as html;
import 'package:simple_cookies/simple_cookies.dart';


 class MessageListener extends StatefulWidget {
      @override
      _MessageListenerState createState() => _MessageListenerState();
  }

class _MessageListenerState extends State<MessageListener> {
  String last;

  @override
  void initState() {
    html.window.addEventListener('message', listen, true);
    super.initState();
  }

  @override
  void dispose() {
    html.window.removeEventListener('message', listen, true);
    super.dispose();
  }

  void listen(html.Event event) {
    last = Cookies.get('iframe_message') ?? 'Error';
    setState(() {});
  }

  @override
  Widget build(BuildContext …