Code reviewMediumcr-p091

Subject CorrectnessLevel Mid–Senior~18 minCommon in Code quality & review interviewsIndustries Software development

Question

Review this React 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 reviewjavascript

1function Counter() {2  const [count, setCount] = useState(0);3  useEffect(() => {4    const id = setInterval(() => setCount(count + 1), 1000);5    return () => clearInterval(id);6  }, []);7}

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