dependencies:
  flutter_hooks: ^0.20.5
  hooks_riverpod: ^2.5.1

import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';

class HomePage extends HookConsumerWidget {
  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final counter = useState(0);

    return Scaffold(
      body: Center(
        child: Column(
          children: [
            Text('นับ: \${counter.value}'),
            ElevatedButton(
              onPressed: () => counter.value++,
              child: Text('เพิ่ม'),
            )
          ],
        ),
      ),
    );
  }
}

import 'package:flutter_hooks/flutter_hooks.dart';

ValueNotifier<T> useDebounce<T>(T initialValue, Duration delay) {
  final state = useState<T>(initialValue);
  final debounced = useState<T>(initialValue);

  useEffect(() {
    final timer = Timer.periodic(delay, (_) {
      debounced.value = state.value;
    });
    return timer.cancel;
  }, [state.value]);

  return state;
}

final keyword = useDebounce<String>('', Duration(milliseconds: 300));