flutter-dev

A practical guide for building cross-platform applications with Flutter 3 and Dart. Focuses on proven patterns, state management, and performance optimization. Flutter, Dart, Material Design, and Cupertino are trademarks of Google LLC and Apple Inc. respectively. Riverpod, Bloc, and GoRouter are open-source packages by their respective maintainers. - Use const constructors wherever possible - Extract static widgets to separate const classes - Use Key for list items (ValueKey, ObjectKey) - Prefer ConsumerWidget over StatefulWidget for state - Riverpod for dependency injection and simple state - Bloc/Cubit for event-driven workflows and complex logic - Never mutate state directly (create new instances) - Use select() to minimize rebuilds - 8pt spacing increments (8, 16, 24, 32, 48) - Responsive breakpoints: mobile ( 1100) - Support all screen sizes with flexible layouts - Follow Material 3 / Cupertino design guidelines - Profile with DevTools before optimizing - Target <16ms frame time for 60fps - Use RepaintBoundary for complex animations - Offload heavy work with compute()