Edit File: use-previous.js
/** * External dependencies */ import { useRef, useEffect } from 'react'; /** * Use Previous based on https://usehooks.com/usePrevious/. * * @param {*} value * @param {Function} [validation] Function that needs to validate for the value * to be updated. */ export const usePrevious = ( value, validation ) => { const ref = useRef(); useEffect( () => { if ( ref.current !== value && ( ! validation || validation( value, ref.current ) ) ) { ref.current = value; } }, [ value, validation ] ); return ref.current; };