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Edit File: use-shallow-equal.js

/** * External dependencies */ import { useRef } from '@wordpress/element'; import isShallowEqual from '@wordpress/is-shallow-equal'; /** * A custom hook that compares the provided value across renders and returns the * previous instance if shallow equality with previous instance exists. * * This is particularly useful when non-primitive types are used as * dependencies for react hooks. * * @param {*} value Value to keep the same if satisfies shallow equality. * * @return {*} The previous cached instance of the value if the current has * shallow equality with it. */ export const useShallowEqual = ( value ) => { const ref = useRef(); if ( ! isShallowEqual( value, ref.current ) ) { ref.current = value; } return ref.current; };