b1

main.dart

import 'package:flutter_web/material.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web_ui/ui.dart' as ui;

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHome(),
      );
  }
}

class MyHome extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
   return Scaffold(
      appBar: AppBar(title: Text("Hello")),
    ); 
  }
}