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usePrevious.js
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Created: Mon, Feb 3, 05:53

usePrevious.js
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	import { useEffect, useRef } from 'react';
	/**
	* Store the last of some value. Tracked via a `Ref` only updating it
	* after the component renders.
	*
	* Helpful if you need to compare a prop value to it's previous value during render.
	*
	* ```ts
	* function Component(props) {
	* const lastProps = usePrevious(props)
	*
	* if (lastProps.foo !== props.foo)
	* resetValueFromProps(props.foo)
	* }
	* ```
	*
	* @param value the value to track
	*/

	export default function usePrevious(value) {
	var ref = useRef(null);
	useEffect(function () {
	ref.current = value;
	});
	return ref.current;
	}

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