MyEMS / myems

import React, { useState, useEffect, useRef } from 'react';

const useInterval = (callback, delay) => {

  const savedCallback = useRef();

  // Remember the latest callback.

  useEffect(() => {

    savedCallback.current = callback;

  });

  // Set up the interval.

  useEffect(() => {

    function tick() {

      savedCallback.current();

    }

    if (delay !== null) {

      let id = setInterval(tick, delay);

      return () => clearInterval(id);

    }

  }, [delay]);

};

export default useInterval;