The useTransition hook lets you mark state updates as non-urgent, keeping your UI responsive during expensive renders. Here's how to use it.
Basic Usage
Loading code block...
Tab Switching
Loading code block...
List Filtering
Loading code block...
Navigation with Pending UI
Loading code block...
Form with Expensive Validation
Loading code block...
Search with Debounce Alternative
Loading code block...
Multiple Transitions
Loading code block...
With Suspense
Loading code block...
Best Practices
When to Use:
✓ Tab switching with heavy content
✓ Search/filter with large lists
✓ Form validation feedback
✓ Navigation between views
✓ Any non-urgent state update
Patterns:
✓ Pair urgent and non-urgent updates
✓ Show isPending feedback
✓ Use with Suspense for data fetching
✓ Consider useDeferredValue alternative
Performance:
✓ Wrap only the slow update
✓ Keep transitions granular
✓ Don't nest startTransition calls
✓ Use memo for expensive children
Avoid:
✗ Wrapping all state updates
✗ Using for urgent UI feedback
✗ Controlled input value in transition
✗ Ignoring isPending state
Conclusion
The useTransition hook keeps your UI responsive by marking state updates as non-urgent. Use it for tab switching, list filtering, and navigation where the update can be deferred. The isPending flag lets you show loading states while transitions process. Pair it with useMemo for expensive computations and Suspense for data fetching. Remember: urgent updates like text input should stay outside startTransition.