重置倒数计时

Question

我发现了一个适合我的Web项目的倒计时。我希望倒计时在每个星期五的上午9点重新开始。有人可以给我一个提示吗？这是代码：

(function(){
   const days = document.getElementById("days");
   const hours = document.getElementById("hours");
   const minutes = document.getElementById("minutes");
   const seconds = document.getElementById("seconds");
   const currentDate = new Date().getFullYear();

  const concertDate = new Date(`June 19 ${currentDate} 09:00:00`);

  function updateCountdown() {
     const currentTime = new Date();
     const diff = concertDate - currentTime;

     const d = Math.floor(diff / 1000 / 60 / 60 / 24);
     const h = Math.floor(diff / 1000 / 60 / 60) % 24;
     const m = Math.floor(diff / 1000 / 60) % 60;
     const s = Math.floor(diff / 1000) % 60;

     days.innerHTML = d;
     hours.innerHTML = h < 10 ? "0" + h : h;
     minutes.innerHTML = m < 10 ? "0" + m : m;
     seconds.innerHTML = s < 10 ? "0" + s : s;
}

setInterval(updateCountdown, 1000);

})();

Answer 1

您可以使用[cron]：https://www.npmjs.com/package/cron;

您的计划时间应为0 9 * * 5