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Abundance of New Unfamiliar React APIs (Profiler, ViewTransition, cache, etc.)

4/10 Low

React 19 introduced numerous new APIs with low familiarity among developers: Profiler (57% unfamiliar), ViewTransition (41%), Activity (41%), cache (41%), useEffectEvent (40%), useDeferredValue (39%). This creates knowledge gaps and increases the learning curve for developers trying to stay current.

ReactProfilerViewTransitionReact cacheuseEffectEventuseDeferredValue
Category
docs
Stage
onboarding
Freshness
emerging
Scope
framework
Recurring
No
Buyer Type
individual
Maintainer
active

Sources

Collection History

Query: “What are the most common pain points with React for developers in 2025?”3/28/2026

1. `<Profiler>` - 57% / 2. `<ViewTransition>` - 41% / 3. `<Activity>` - 41% / 4. `React cache` - 41% / 5. `useEffectEvent` - 40% / 6. `useDeferredValue` - 39%

Created: 3/28/2026Updated: 3/28/2026