ginnoir
3d825fba20
Adds the Vercel skill under .agents with famapp path patterns. Includes skills-lock.json pin.
27 lines
566 B
Markdown
27 lines
566 B
Markdown
---
|
|
title: Use Activity Component for Show/Hide
|
|
impact: MEDIUM
|
|
impactDescription: preserves state/DOM
|
|
tags: rendering, activity, visibility, state-preservation
|
|
---
|
|
|
|
## Use Activity Component for Show/Hide
|
|
|
|
Use React's `<Activity>` to preserve state/DOM for expensive components that frequently toggle visibility.
|
|
|
|
**Usage:**
|
|
|
|
```tsx
|
|
import { Activity } from "react";
|
|
|
|
function Dropdown({ isOpen }: Props) {
|
|
return (
|
|
<Activity mode={isOpen ? "visible" : "hidden"}>
|
|
<ExpensiveMenu />
|
|
</Activity>
|
|
);
|
|
}
|
|
```
|
|
|
|
Avoids expensive re-renders and state loss.
|