ahooks/es/usePrevious/index.js

react hooks library

import { useRef } from 'react';
const defaultShouldUpdate = (a, b) => !Object.is(a, b);
function usePrevious(state, shouldUpdate = defaultShouldUpdate) {
    const prevRef = useRef(undefined);
    const curRef = useRef(undefined);
    if (shouldUpdate(curRef.current, state)) {
        prevRef.current = curRef.current;
        curRef.current = state;
    }
    return prevRef.current;
}
export default usePrevious;