State Persistence
State persistence ensures that important application data remains available even after the app is closed and reopened, improving user experience by avoiding the need to reload or re-enter information.
Why Persist State?
Without persistence, all in-memory state is lost when the app is closed, forcing users to log in again, lose their cart contents, or lose unsaved preferences every time they restart the app.
Persisting with AsyncStorage Directly
Persisting Redux State with Redux Persist
Redux Persist automatically saves specified slices of your Redux store to AsyncStorage and rehydrates them when the app restarts, as covered in the dedicated Redux Persist tutorial.
Persisting Zustand State
Choosing What to Persist
Not all state should be persisted. Sensitive data may require secure storage instead of plain AsyncStorage, and temporary UI state like modal visibility typically should not be persisted at all.
Secure Storage for Sensitive Data
For sensitive information like authentication tokens, libraries such as react-native-keychain or react-native-encrypted-storage provide encrypted storage instead of plain AsyncStorage.
Handling Rehydration Loading States
Since reading from storage is asynchronous, apps should display a loading screen while persisted state is being rehydrated, preventing a flash of incorrect default state on startup.
Conclusion
Implementing thoughtful state persistence, choosing the right storage mechanism based on data sensitivity, ensures your React Native application provides a seamless, uninterrupted experience across app restarts.
