EP 4 · 21 June 2026
React 19's use() hook: the end of useEffect data fetching
React 19 shipped use() — read a promise or context right in render, with Suspense doing the waiting. The useEffect-fetch-setState dance that's haunted every React codebase since 2019 finally has an exit.
We refactor a classic loading-spinner mess into something half the size, then talk about where use() bites back: waterfalls, and why you still need a data layer.
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