Exit Prop Required Inside AnimatePresence

Elements inside AnimatePresence should have exit prop defined.

Incorrect (missing exit):

<AnimatePresence>
  {isOpen && (
    <motion.div initial={{ opacity: 0 }} animate={{ opacity: 1 }} />
  )}
</AnimatePresence>

Correct (exit defined):

<AnimatePresence>
  {isOpen && (
    <motion.div
      initial={{ opacity: 0 }}
      animate={{ opacity: 1 }}
      exit={{ opacity: 0 }}
    />
  )}
</AnimatePresence>