snapshot of https://github.com/flutter/samples.git (main, 2026-09-16; blobs > 131072B omitted)

web_embedding/ng-flutter/flutter/lib/main.dart

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+import 'dart:js_interop' show createJSInteropWrapper;
+
+import 'package:flutter/material.dart';
+
+import 'pages/counter.dart';
+import 'pages/dash.dart';
+import 'pages/text.dart';
+
+import 'src/js_interop.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatefulWidget {
+  const MyApp({super.key});
+
+  @override
+  State<MyApp> createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
+  final ValueNotifier<DemoScreen> _screen = ValueNotifier<DemoScreen>(
+    DemoScreen.counter,
+  );
+  final ValueNotifier<int> _counter = ValueNotifier<int>(0);
+  final ValueNotifier<String> _text = ValueNotifier<String>('');
+
+  late final DemoAppStateManager _state = DemoAppStateManager(
+    screen: _screen,
+    counter: _counter,
+    text: _text,
+  );
+
+  @override
+  void initState() {
+    super.initState();
+    final export = createJSInteropWrapper(_state);
+
+    // Emit this through the root object of the flutter app :)
+    broadcastAppEvent('flutter-initialized', export);
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Element embedding',
+      theme: ThemeData(
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
+      ),
+      home: ValueListenableBuilder<DemoScreen>(
+        valueListenable: _screen,
+        builder: (context, value, child) => demoScreenRouter(value),
+      ),
+    );
+  }
+
+  Widget demoScreenRouter(DemoScreen which) => switch (which) {
+    DemoScreen.counter => CounterDemo(counter: _counter),
+    DemoScreen.text => TextFieldDemo(text: _text),
+    DemoScreen.dash => DashDemo(text: _text),
+  };
+}