@binaryoperations/json-schema-form/hooks/usePrevious.ts

import { useLayoutEffect } from 'react';
import { useRef } from "./useRef";


export const usePrevious = <T>(value: T) => {
    const ref = useRef<T>(value);

    // this hook runs before any use effect, so set the previous value.
    useLayoutEffect(() => {
        ref.current = value;
    }, [value]);


    return ref;
};

export default usePrevious;