@boomerang-io/utils/es/hooks/useCountdown/useCountdown.js

A library of reusable utilities and hooks for React webapps on the Boomerang platform.

import { useState, useEffect, useRef } from "react";
function useCountdown(_ref) {
  let {
    countdown,
    onCountdownEnd,
    reset
  } = _ref;
  const [ct, setCountdown] = useState(countdown);
  const timer = useRef(null);
  useEffect(() => {
    if (reset) setCountdown(countdown);
    if (ct < 1) {
      setCountdown(countdown);
      onCountdownEnd();
    }
    clearInterval(timer.current);
    const countdownCounter = () => {
      setCountdown(ct - 1);
    };
    timer.current = setInterval(countdownCounter, 1000);
    return function cleanup() {
      clearInterval(timer);
    };
  }, [reset, ct, countdown, onCountdownEnd]);
  return ct;
}
export default useCountdown;