mirror of
https://github.com/kjanat/livedash-node.git
synced 2026-02-13 22:35:47 +01:00
Kaj Kowalski
cd05fc8648
- Fix syntax errors in skills markdown files (.github/skills, .opencode/skills) - Change typescript to tsx for code blocks with JSX - Replace ellipsis (...) in array examples with valid syntax - Separate CSS from TypeScript into distinct code blocks - Convert JavaScript object examples to valid JSON in docs - Fix enum definitions with proper comma separation
39 lines
818 B
Markdown
39 lines
818 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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