2025 10 04 18 CHANCE STRICKLAND CONGRESO REACT ALICANTE The international React js conference in
summary
React 19.2 adds a concrete solution: the activity API lets components stay mounted but visually hidden so form and scroll state persist while React deprioritizes hidden work, avoiding manual DOM hacks. The demo wires browser view transitions via document.startViewTransition plus CSS pseudo selectors, and synchronizes React updates with flushSync (or useTransition) so snapshots animate reliably. The talk shows code that keeps state, reprioritizes rendering, and composes smooth page and shared‑element animations without fragile DOM juggling.
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chapters (10)
- 0:00Introduction
- 2:16React’s declarative model
- 8:17Demo: video player app
- 10:23State loss in components
- 14:53React 19.2 Activity API
- 18:48UI transitions with animations
- 21:41View transitions in React
- 27:00Shared element transitions
- 31:43Making transitions declarative with useTransition
- 34:37React’s composable future
