Resetting all state when a prop changes

reset-all-state-when-prop-changes.ts

export default function ProfilePage({ userId }) {
  return (
    <Profile
      userId={userId}
      key={userId}
    />
  );
}

function Profile({ userId }) {
  // ✅ This and any other state below will reset on key change automatically
  const [comment, setComment] = useState('');
  // ...
}