WFDASH-WEBAPP/.kilo/skills/vercel-react-best-practices/rules/bundle-conditional.md
Dave 426bcb188a feat(duplicate-orders): refine duplicate order detection logic and UI enhancements
- Improved the `DuplicateOrdersDialog` component with better tab navigation for order number and line aggregate views.
- Enhanced the data structure for duplicate records to include `totalQuantity` and `totalSellingPrice` for more accurate detection.
- Implemented auto-flipping logic to ensure users see relevant content without encountering empty views.
- Expanded test coverage for the `findDuplicateOrders` function to validate new matching logic.
- Updated documentation to clarify duplicate identification criteria.
2026-08-16 16:27:45 +02:00

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Markdown

---
title: Conditional Module Loading
impact: HIGH
impactDescription: loads large data only when needed
tags: bundle, conditional-loading, lazy-loading
---
## Conditional Module Loading
Load large data or modules only when a feature is activated.
**Example (lazy-load animation frames):**
```tsx
function AnimationPlayer({ enabled, setEnabled }: { enabled: boolean; setEnabled: React.Dispatch<React.SetStateAction<boolean>> }) {
const [frames, setFrames] = useState<Frame[] | null>(null)
useEffect(() => {
if (enabled && !frames && typeof window !== 'undefined') {
import('./animation-frames.js')
.then(mod => setFrames(mod.frames))
.catch(() => setEnabled(false))
}
}, [enabled, frames, setEnabled])
if (!frames) return <Skeleton />
return <Canvas frames={frames} />
}
```
The `typeof window !== 'undefined'` check prevents bundling this module for SSR, optimizing server bundle size and build speed.