Persisting Redux State with RTK Query
RTK Query manages server cache automatically in memory, but this cache is lost when the page reloads. To persist specific parts of your Redux state across reloads, including RTK Query data if needed, you can integrate persistence middleware such as redux-persist. However, RTK Query cache persistence is typically avoided because it can lead to stale data unless refetched on app start.
1. Persist Only Critical State: Use
redux-persistfor slices like authentication, user preferences, or local UI state.2. Avoid Persisting RTK Query Cache: Let RTK Query refetch data automatically when components mount to ensure freshness.
3. Trigger Refetch on Rehydration: If persistence is necessary, use
api.util.invalidateTags()or manual refetching after rehydration.4. Combine with createAsyncThunk (if needed): You can persist results from thunks while letting RTK Query handle real-time API synchronization.
In this setup, redux-persist stores the authentication state in localStorage while RTK Query refetches server data automatically. This ensures critical state is retained across reloads without risking outdated cached responses.