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useUnmount.md

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useUnmount

React lifecycle hook that calls a function when the component will unmount. Use useEffectOnce if you need both a mount and unmount function.

Usage

import {useUnmount} from 'react-use';

const Demo = () => {
  useUnmount(() => alert('UNMOUNTED'));
  return null;
};

Reference

useUnmount(fn: () => void | undefined);