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joplin/packages/app-desktop/gui/hooks/usePrevious.ts
2020-11-05 16:58:23 +00:00

10 lines
229 B
TypeScript

import { useEffect, useRef } from 'react';
export default function usePrevious(value: any, initialValue:any = null): any {
const ref = useRef(initialValue);
useEffect(() => {
ref.current = value;
});
return ref.current;
}