Black BeltuseeffectlockPREMIUM

useEffectEvent Polyfill - Stable Handler Without Stale Closures

A team wants an effect's callback to always read the latest props and state without listing them as dependencies, and considers polyfilling the experimental useEffectEvent hook using a ref that stores the latest function.

REACT_MODULE // 0x42

function useEffectEvent(fn) {
const ref = useRef(fn);
useLayoutEffect(() => {
ref.current = fn;
});
return useCallback((...args) => ref.current(...args), []);
}

What tradeoff does this ref-based polyfill introduce compared to the real useEffectEvent, and why does the timing matter?

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