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singular-particular-space/skills/react-best-practices/rules/advanced-use-latest.md
JL Kruger 5422131782 Initial commit — Singular Particular Space v1
Homepage (site/index.html): integration-v14 promoted, Writings section
integrated with 33 pieces clustered by type (stories/essays/miscellany),
Writings welcome lightbox, content frame at 98% opacity.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-27 12:09:22 +02:00

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title, impact, impactDescription, tags
title impact impactDescription tags
useEffectEvent for Stable Callback Refs LOW prevents effect re-runs advanced, hooks, useEffectEvent, refs, optimization

useEffectEvent for Stable Callback Refs

Access latest values in callbacks without adding them to dependency arrays. Prevents effect re-runs while avoiding stale closures.

Incorrect (effect re-runs on every callback change):

function SearchInput({ onSearch }: { onSearch: (q: string) => void }) {
  const [query, setQuery] = useState('')

  useEffect(() => {
    const timeout = setTimeout(() => onSearch(query), 300)
    return () => clearTimeout(timeout)
  }, [query, onSearch])
}

Correct (using React's useEffectEvent):

import { useEffectEvent } from 'react';

function SearchInput({ onSearch }: { onSearch: (q: string) => void }) {
  const [query, setQuery] = useState('')
  const onSearchEvent = useEffectEvent(onSearch)

  useEffect(() => {
    const timeout = setTimeout(() => onSearchEvent(query), 300)
    return () => clearTimeout(timeout)
  }, [query])
}