use-effect-with-previous/dist/index.es.js

A layer over useEffect that provides previous values of dependencies.

import { useRef, useEffect } from 'react';

function useEffectWithPrevious(callback, dependencies) {
    var refs = useRef(Array(dependencies.length).fill(null));
    useEffect(function () {
        var cleanup = callback(refs.current);
        dependencies.forEach(function (dependency, i) {
            refs.current[i] = dependency;
        });
        return cleanup;
    }, dependencies);
    return null;
}

export default useEffectWithPrevious;
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