React 19 useTransition & useDeferredValue: When to Use Which (2026)
📰 Dev.to · Carlos Oliva Pascual
Learn when to use React 19's useTransition and useDeferredValue hooks for managing urgent and non-urgent renders
Action Steps
- Identify urgent and non-urgent renders in your React application
- Use useTransition for urgent renders that require immediate attention
- Apply useDeferredValue for non-urgent renders that can be delayed
- Configure useTransition with the appropriate timeout value
- Test the performance difference between useTransition and useDeferredValue in your application
Who Needs to Know This
Frontend developers and engineers working with React 19 can benefit from understanding the use cases for useTransition and useDeferredValue to optimize their application's performance
Key Insight
💡 Use useTransition for urgent renders and useDeferredValue for non-urgent renders to improve your application's responsiveness
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Optimize your #React19 app's performance with useTransition and useDeferredValue!
Key Takeaways
Learn when to use React 19's useTransition and useDeferredValue hooks for managing urgent and non-urgent renders
Full Article
Both useTransition and useDeferredValue exist because React 19 cares about which renders are urgent...
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