State Management Unidirectional Flow Single Source Immutability Flux Dispatcher Redux Redux Principles Redux Data Flow Store Action Reducer Middleware Middleware Pipeline Middleware Use Cases Thunk Async Thunk Flow Redux Toolkit Why RTK createAsyncThunk Immer in RTK Reactive State MobX

State Management

Middleware Use Cases

Middleware handles concerns that reducers must not handle.

Typical uses

Async flows (requests, retries, queues)
Side effects (timers, storage, auth)
Logging and analytics
Action validation and transformation

Key constraint

Middleware can change or stop actions, but it never changes state directly

Middleware Pipeline

Thunk

On this page

Typical uses Key constraint