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React useTimeout Hook Fixes Common Timer Bugs in Component Lifecycle

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A technical guide published on DEV Community highlights three common bugs in React's setTimeout usage, including memory leaks from uncleaned timers and double-firing in React 18 StrictMode. The article proposes replacing manual useEffect-based timer logic with useTimeoutFn and useTimeout hooks from the @reactuses/core library. Both hooks return a three-element tuple — isPending, start, and cancel — giving developers explicit control over timer state. useTimeoutFn executes a callback at the deadline, while useTimeout simply flips a pending flag and triggers a re-render. The library handles automatic cleanup on unmount and prevents duplicate timers when actions are repeated mid-countdown.

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React useTimeout Hook Fixes Common Timer Bugs in Component Lifecycle · ShortSingh