mastering-animate-presence

SKILL.md

When elements leave the DOM, they're gone—no way to animate something that doesn't exist. Motion's AnimatePresence solves this by keeping departing elements mounted long enough to animate out.

| AnimatePresence | Wrapper that enables exit animations | | useIsPresent | Hook to read if component is exiting | | usePresence | Hook for manual exit control with safeToRemove | | propagate | Prop to enable nested exit animations | | mode | Controls timing between enter/exit (sync, wait, popLayout) |

Use useIsPresent when a component needs to know it's exiting:

使用 Motion 的 AnimatePresence 組件實現退出動畫的指南。當對離開 DOM 的元素進行動畫處理、協調嵌套退出或管理存在狀態時使用。觸發涉及 React 退出動畫、卸載轉換或運動庫模式的任務。 來源：raphaelsalaja/userinterface-wiki。

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