Stop Using useEffect for Everything: Smarter State Management in React

Every React developer has been there. You need to sync some state, fetch data, or react to a prop change — and almost by instinct, you reach for useEffect . It works. The tests pass. You ship it. Then six months later, someone (probably future you) opens that component and stares into a tangled web of dependencies, stale closures, and infinite loops. Sound familiar? The truth is: useEffect is one of the most misused hooks in React . Not because it is bad — it is actually brilliant when used correctly — but because developers treat it as the Swiss Army knife of state management. This post is about learning when NOT to use it, and what to reach for instead. The Core Misunderstanding useEffect exists to synchronize your component with an external system — a network request, a browser API, a third-party library. That is it. It is not a general-purpose event handler or a place to calculate derived state. The React team has been explicit about this in their updated docs: "If you're not conne