useGetSet.md

useGetSet

React state hook that returns state getter function instead of raw state itself, this prevents subtle bugs when state is used in nested functions.

Usage

Below example uses useGetSet to increment a number after 1 second on each click.

import {useGetSet} from 'react-use';

const Demo = () => {
  const [get, set] = useGetSet(0);
  const onClick = () => {
    setTimeout(() => {
      set(get() + 1)
    }, 1_000);
  };

  return (
    <button onClick={onClick}>Clicked: {get()}</button>
  );
};

If you would do this example in a naive way using regular useState hook, the counter would not increment correctly if you click fast multiple times.

const DemoWrong = () => {
  const [cnt, set] = useState(0);
  const onClick = () => {
    setTimeout(() => {
      set(cnt + 1)
    }, 1_000);
  };

  return (
    <button onClick={onClick}>Clicked: {cnt}</button>
  );
};