lbry-desktop/ui/effects/use-interval.js

import { useRef, useEffect } from 'react';

export default function useInterval(callback, delay) {
  const savedCallback = useRef();

  useEffect(() => {
    savedCallback.current = callback;
  }, [callback]);

  useEffect(() => {
    const tick = () => {
      savedCallback.current();
    };
    if (delay !== null) {
      const id = setInterval(tick, delay);
      return () => clearInterval(id);
    }
  }, [delay]);
}