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Tommaso CasaburiandGitHub
a92b185a66
* chore(ai-workflow): track repo-managed review tooling * fix(ai-workflow): remove repo-specific path assumptions Make shared workflow hooks and APK testing guidance resolve paths from the repo and contributor environment so the tooling works for all contributors, not just one machine.
39 lines
815 B
Markdown
39 lines
815 B
Markdown
---
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title: CSS content-visibility for Long Lists
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impact: HIGH
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impactDescription: faster initial render
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tags: rendering, css, content-visibility, long-lists
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---
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## CSS content-visibility for Long Lists
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Apply `content-visibility: auto` to defer off-screen rendering.
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**CSS:**
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```css
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.message-item {
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content-visibility: auto;
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contain-intrinsic-size: 0 80px;
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}
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```
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**Example:**
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```tsx
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function MessageList({ messages }: { messages: Message[] }) {
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return (
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<div className="overflow-y-auto h-screen">
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{messages.map(msg => (
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<div key={msg.id} className="message-item">
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<Avatar user={msg.author} />
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<div>{msg.content}</div>
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</div>
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))}
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</div>
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)
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}
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```
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For 1000 messages, browser skips layout/paint for ~990 off-screen items (10× faster initial render).
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