Optimistic updates show changes instantly before server confirmation. Here's how to implement them.
Why Optimistic Updates?
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Basic Implementation
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Custom Hook
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With React Query
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With Zustand
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Handling Race Conditions
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Visual Feedback
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Error Recovery UI
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Best Practices
Implementation:
✓ Use unique temporary IDs
✓ Track pending state visually
✓ Handle race conditions
✓ Provide rollback mechanism
UX:
✓ Show visual feedback for pending items
✓ Disable interactions during pending
✓ Offer retry on failure
✓ Consider undo functionality
Error Handling:
✓ Rollback on failure
✓ Show clear error messages
✓ Allow manual retry
✓ Log failures for debugging
Performance:
✓ Batch related updates
✓ Debounce rapid changes
✓ Cancel pending requests on new updates
✓ Invalidate and refetch after mutations
Conclusion
Optimistic updates provide instant feedback while syncing with the server. Implement proper rollback for failures, show visual feedback for pending states, and handle race conditions. Use libraries like React Query for built-in support and consistent patterns.