flutter-expert

Riverpod state management uses providers like StateProvider for simple state, FutureProvider for async calls, and NotifierProvider for complex logic. Consume state with ConsumerWidget and ref.watch, using select() to limit rebuilds to specific fields.

Use Riverpod for simple mutable state and dependency injection; use Bloc or Cubit for event-driven workflows like forms, auth, and wizards needing explicit event-to-state transitions. Bloc offers more predictable, testable flows for complex business logic.

GoRouter setup defines a GoRouter instance with routes, path parameters like :id, and an optional redirect for auth guards. Pass it to MaterialApp.router via routerConfig, then navigate with context.go, context.push, or context.pop.

Jank usually comes from expensive build() methods, missing const constructors, or heavy work on the UI thread. Profile with flutter run --profile and DevTools, then apply const widgets, RepaintBoundary, and compute() for heavy computation.

Avoid setState for app-wide state because it rebuilds the entire widget subtree. Use it only for local ephemeral state; for shared state, use Riverpod consumers or Bloc with scoped rebuilds instead.