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#
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Tab Switching#
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List Filtering#
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Navigation with Pending UI#
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Form with Expensive Validation#
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Search with Debounce Alternative#
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Multiple Transitions#
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With Suspense#
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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.