React 19 use() hook and Suspense: when it replaces useEffect and when it throws you into a worse loop

React 19's use() hook promises to replace useEffect for data fetching. That promise is partially true. There are two patterns with Suspense and error boundaries where the behavior isn't what you expect and the cycle gets messier. I'll tell you exactly when to migrate and when not to.

Jun 02 2026 · 7′ · Tutorials · React · TypeScript