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danakt/usePrev.ts

Created December 3, 2018 13:09
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React hook to use previous data
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usePrev.ts
/**
* React hook to use previous data
*/
const usePrevious = function<T>(value: T): undefined | T {
const ref = React.useRef<T | undefined>(undefined);
React.useEffect(() => {
ref.current = value;
});
return ref.current;
};
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