Code reviewHardcr-g406

Subject Frontend bugsLevel Senior–Staff~20 minCommon in Code quality & review interviewsIndustries Software development

Question

Review this React TypeScript filtered-summary component.

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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Code to reviewtsx

1function Summary({ rows, threshold }: { rows: Row[]; threshold: number }) {2  const total = useMemo(() => {3    return rows.filter((r) => r.value > threshold).reduce((s, r) => s + r.value, 0);4  }, [rows]);5 6  return <strong>{total}</strong>;7}

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