react-use/src/usePrevious.ts
2020-07-02 14:19:03 -05:00

12 lines
214 B
TypeScript

import { useEffect, useRef } from 'react';
export default function usePrevious<T>(state: T): T | undefined {
const ref = useRef<T>();
useEffect(() => {
ref.current = state;
});
return ref.current;
}