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

web_embedding/ng-flutter/flutter/lib/pages/counter.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/material.dart';
+
+class CounterDemo extends StatefulWidget {
+  const CounterDemo({super.key, required this.counter});
+
+  final ValueNotifier<int> counter;
+
+  @override
+  State<CounterDemo> createState() => _CounterDemoState();
+}
+
+class _CounterDemoState extends State<CounterDemo> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+        title: const Text('Counter'),
+      ),
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            const Text('You have pushed the button this many times:'),
+            ValueListenableBuilder(
+              valueListenable: widget.counter,
+              builder: (context, value, child) => Text(
+                '$value',
+                style: Theme.of(context).textTheme.headlineMedium,
+              ),
+            ),
+          ],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: () {
+          widget.counter.value++;
+        },
+        tooltip: 'Increment',
+        child: const Icon(Icons.add),
+      ),
+    );
+  }
+}