dan
2 years ago
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1 changed files with
2 additions and
2 deletions
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beta/src/content/apis/react/useMemo.md
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@ -1365,7 +1365,7 @@ function ReportList({ items }) { |
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<article> |
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{items.map(item => { |
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// 🔴 You can't call useMemo in a loop like this: |
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const data = calculateReport(item); |
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const data = useMemo(() => calculateReport(item), [item]); |
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return ( |
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<figure key={data.id}> |
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<Chart data={data} /> |
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@ -1392,7 +1392,7 @@ function ReportList({ items }) { |
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function Report({ item }) { |
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// ✅ Call useMemo at the top level: |
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const data = calculateReport(item); |
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const data = useMemo(() => calculateReport(item), [item]); |
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return ( |
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<figure> |
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<Chart data={data} /> |
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