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btoo / usePrevious.ts
Last active September 11, 2022 15:30
typescript type-safe version of usePrevious taken directly from the react docs https://reactjs.org/docs/hooks-faq.html#how-to-get-the-previous-props-or-state
import { useRef, useEffect } from 'react';
/**
* a type-safe version of the `usePrevious` hook described here:
* @see {@link https://reactjs.org/docs/hooks-faq.html#how-to-get-the-previous-props-or-state}
*/
export function usePrevious<T>(
value: T,
): ReturnType<typeof useRef<T>>['current'] {
const ref = useRef<T>();