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User Interface Wiki

Living wiki of UI design patterns and best practices built with Fumadocs, Next.js, and Base UI components.

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rules/presence-hook-in-child.md

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rules/presence-hook-in-child.md

1---
2title: useIsPresent in Child Component
3impact: HIGH
4tags: presence, hook, component-hierarchy
5---
6 
7## useIsPresent in Child Component
8 
9useIsPresent must be called from child of AnimatePresence, not parent.
10 
11**Incorrect (hook in parent):**
12 
13```tsx
14function Parent() {
15  const isPresent = useIsPresent();
16  return (
17    <AnimatePresence>
18      {show && <Child />}
19    </AnimatePresence>
20  );
21}
22```
23 
24**Correct (hook in child):**
25 
26```tsx
27function Child() {
28  const isPresent = useIsPresent();
29  return <motion.div data-exiting={!isPresent} />;
30}
31```
32

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rules/presence-hook-in-child.md