【九月打卡第一天】倒计时

<div class="countdown">

    <span class="time hour">03</span>

    <span class="division">:</span>

    <span class="time minute">05</span>

    <span class="division">:</span>

    <span class="time second">25</span>

  </div>

var currentDate = new Date()

    var nextDate = new Date(currentDate.getFullYear(), currentDate.getMonth(), currentDate.getDate() + 1)

    setInterval(function() {

      var currentDate = new Date()

      var intervalTime = (nextDate - currentDate) / 1000

      var hour = Math.floor(intervalTime / 3600)

      var minute = Math.floor(intervalTime / 60 % 60)

      var second = Math.floor(intervalTime % 60)

      var hourEl = document.querySelector(".hour")

      var minuteEl = document.querySelector(".minute")

      var secondEl = document.querySelector(".second")

      hourEl.textContent = String(hour).padStart(2, "0")

      minuteEl.textContent = String(minute).padStart(2, "0")

      secondEl.textContent = String(second).padStart(2, "0")

    }, 1000);