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Tommaso CasaburiandClaude Opus 4.6
189d1c2165
Mirrors .cursor and .codex structure with Claude model assignments: - haiku for lighter tasks (translator, browser-check, profiler) - sonnet for standard tasks (code-quality, plan-implementer, etc.) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
27 lines
564 B
Markdown
27 lines
564 B
Markdown
---
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title: Use Activity Component for Show/Hide
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impact: MEDIUM
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impactDescription: preserves state/DOM
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tags: rendering, activity, visibility, state-preservation
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---
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## Use Activity Component for Show/Hide
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Use React's `<Activity>` to preserve state/DOM for expensive components that frequently toggle visibility.
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**Usage:**
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```tsx
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import { Activity } from 'react'
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function Dropdown({ isOpen }: Props) {
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return (
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<Activity mode={isOpen ? 'visible' : 'hidden'}>
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<ExpensiveMenu />
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</Activity>
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)
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}
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```
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Avoids expensive re-renders and state loss.
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