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JS-模拟京东倒计时效果

2021-10-09 19:32:16 作者：互联网

计算到下课还有多少时间

在这里插入图片描述

事件戳
全部代码

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Document</title>
  <style>
    .countdown {
      width: 240px;
      height: 305px;
      text-align: center;
      line-height: 1;
      color: #fff;
      background-color: brown;
      /* background-size: 240px; */
      /* float: left; */
      overflow: hidden;
      position: relative;
    }

    .countdown .next {
      font-size: 16px;
      margin: 25px 0 14px;
    }

    .countdown .title {
      font-size: 33px;
    }

    .countdown .tips {
      margin-top: 80px;
      font-size: 23px;
    }

    .countdown small {
      font-size: 17px;
    }

    .countdown .clock {
      width: 142px;
      margin: 18px auto 0;
      overflow: hidden;
    }

    .countdown .clock span,
    .countdown .clock i {
      display: block;
      text-align: center;
      line-height: 34px;
      font-size: 23px;
      float: left;
    }

    .countdown .clock span {
      width: 34px;
      height: 34px;
      border-radius: 2px;
      background-color: #303430;
    }

    .countdown .clock i {
      width: 20px;
      font-style: normal;
    }

    .countdown .newElement {
      position: absolute;
      bottom: 50px;
      text-align: center;
      width: 240px;
    }
  </style>
</head>

<body>
  <div class="countdown">
    <p class="next">今天是2222年2月22日</p>
    <p class="title">下班倒计时</p>
    <p class="clock">
      <span id="hour">00</span>
      <i>:</i>
      <span id="minutes">25</span>
      <i>:</i>
      <span id="scond">20</span>
    </p>
    <p class="tips">
      现在是18:30:00
    </p>
  </div>
  <script>
    //  获取标签
    let hour = document.querySelector('#hour');
    let mintes = document.querySelector('#minutes');
    let scond = document.querySelector('#scond');
    // 开启定时器
    getTime()
    let timer = setInterval(getTime, 1000);
    function getTime() {
      // 获取15:30到现在的时间戳差值
      let now = +new Date();
      let happy = +new Date('2021-10-9 15:54:00');
      // 换算成秒
      let time = (happy - now) / 1000;
      console.log(time);
      if (time < 0) {
        clearInterval(timer);
        let newElemen = document.createElement('p');
        newElemen.innerHTML = '可以去干饭了!';
        newElemen.className = 'newElement';
        document.querySelector('div').insertBefore(newElemen, document.querySelector('.tips'));

      } else {
        let h = parseInt(time / 60 / 60 % 24)
        let m = parseInt(time / 60 % 60)
        let s = parseInt(time % 60)

        hour.innerHTML = h;
        mintes.innerHTML = m;
        scond.innerHTML = s;
      }

    }

  </script>
</body>

</html>

标签：countdown,document,JS,倒计时,let,time,京东,font,size
来源： https://blog.csdn.net/m0_47559177/article/details/120677664