React 19.2 Explained: 5 Game-Changing Updates + 16 useEffect Mistakes to Avoid

I reviewed 50+ React codebases and here's the mistakes you are making with useEffects plus the biggest React 19.2 features announced at React Conf 2025.

Oct 16, 2025

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Here are the 5 biggest updates in React 19.2 including Activity & View Transitions, useEffectEvent, Prewarming, Performance Tracks, and the React Compiler going stable, plus 16 common useEffect mistakes developers make every day.

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