"At its core, the useEffectEvent hook allows you to create stable event handlers within effects. These handlers always have access to the latest state and props, even without being included in the effect's dependency array. However, on a broader scope, the Hook provides a solution to a subtle but common challenge that affects how effects in React handle the stale closure problem."
"This Hook is designed to improve how React handles effects, particularly by addressing the long-standing stale closure problem, a pain point that most React developers encounter daily. The Hook allows developers to write effects that always have access to the latest props and state without triggering unwanted re-renders or manually syncing refs. It's a small but powerful improvement that simplifies code, improves performance, and eliminates a common source of bugs in modern React applications."
React 19.2 introduces a stable useEffectEvent hook that creates stable event handlers inside effects which always see the latest props and state. The hook resolves the stale closure problem that occurs when callbacks capture outdated values, such as setInterval logging an initial state. Traditional workarounds add reactive variables to dependency arrays, which can cause unnecessary effect reruns. useEffectEvent allows up-to-date access without forcing re-renders or manual ref synchronization, simplifying code, improving runtime performance, and reducing a common category of bugs in modern React applications.
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