Skip to main content

usePrevious

  • easy to use previous state

Features​

  • require pass state value in usePrevious

Types​

const usePrevious: <T>(value: T) => T | null;

Example​

const App = () => {
  const [state, setState] = useState(50);
  const previousState = usePrevious(state);

  return (
    <div>{state}</div>
    <div>{previousState}</div>
    <button onClick={() => setState(prev => prev + 1)}>increment</button>
  )
};