FASQ (Flutter Async State Query) #

Caching-first async data management for Flutter.

Fasq is a powerful library for managing asynchronous state in Flutter applications. It handles caching, synchronization, background updates, and error recovery with a simple, declarative API.

Current Version: 0.3.7

📚 Documentation #

For full documentation, guides, and API reference, visit:
https://fasq.shafi.dev

✨ Features #

• 🚀 Simple API: Works with any Future-returning function.
• 💾 Intelligent Caching: Automatic caching with configurable staleness and eviction policies (LRU, LFU, FIFO).
• 🔄 Auto Refetching: Background updates keep your UI fresh without blocking the user.
• ⚡ Request Deduplication: Multiple widgets requesting the same data trigger only one network call.
• 🛠️ Mutations: Integrated mutation management with optimistic updates and offline queuing.
• 📱 Type Safe: Built with strict typing for compile-time safety.
• 🔌 Adapter Ecosystem: Official adapters for Bloc, Riverpod, and Hooks (or use standalone!).

📦 Installation #

Add fasq to your pubspec.yaml:

dependencies:
  fasq: ^0.3.7

🚀 Quick Start #

1. Wrap your App #

Wrap your application with QueryClientProvider:

void main() {
  runApp(
    QueryClientProvider(
      client: QueryClient(),
      child: MyApp(),
    ),
  );
}

2. Fetch Data with QueryBuilder #

Use QueryBuilder to handle loading, error, and success states automatically.

QueryBuilder<List<User>>(
  queryKey: 'users',
  queryFn: () => api.fetchUsers(),
  builder: (context, state) {
    if (state.isLoading) return CircularProgressIndicator();
    if (state.hasError) return Text('Error: ${state.error}');
    
    return ListView.builder(
      itemCount: state.data!.length,
      itemBuilder: (context, index) => Text(state.data![index].name),
    );
  },
)

🧩 Ecosystem #

Fasq is designed to work with your favorite state management solution:

📄 License #

MIT