Juan Torchia's Technical Blog

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Tag: useeffect

2 articles

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.

7 min242

TutorialsReactTypeScript

Why I Stopped Using useEffect to Sync State — and What I Use Instead

useEffect isn't broken — the mental model we teach with it is. I audited every useEffect in a React 19 codebase and found 4 concrete categories where it was an antipattern. Here are the patterns that replaced them: derived state, event handlers, use(), and Server Actions.

7 min344