react-use-previous/dist/index.js

React hook for remembering a previous value.

/* IMPORT */
import { useEffect, useRef } from 'react';
/* MAIN */
const usePrevious = (value) => {
    const ref = useRef();
    useEffect(() => {
        ref.current = value;
    }, [value]);
    return ref;
};
/* EXPORT */
export default usePrevious;