React useEvent Hook Solves Stale Closure Bug With Stable Callback Identity

React developers have long faced a dilemma when passing event handlers to child components or effects: either accept unstable function references that break memoization, or use useCallback and risk stale closures reading outdated state. The stale closure problem — where a handler captures an old snapshot of state rather than the current value — is considered one of the most common bugs in production React code. A solution called useEvent, originally proposed in an official React RFC in 2022, is now available via the @reactuses/core package and also exists as useEffectEvent in React 19.2. The hook returns a function with a permanently stable reference across renders, while its body always reads the latest state and props at call time. Developers are cautioned against calling the returned function during the render phase, as the hook is designed strictly for event and effect callbacks.