Code reviewMediumcr-g184

Subject Memory leak listenersLevel Mid–Senior~18 minCommon in Code quality & review interviewsIndustries Software development

Question

Review this React TypeScript hook.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

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Talk through your review

Code to reviewtsx

1function useWindowWidth() {2  const [width, setWidth] = useState(window.innerWidth);3 4  useEffect(() => {5    const handler = () => setWidth(window.innerWidth);6    window.addEventListener('resize', handler);7  }, []);8 9  return width;10}

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