2023-10-08 js计算指定时间1天后的剩余时间-526互联

<!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>
  </head>
  <body></body>
</html>
<script>
  function countTime(st) {
      const date = new Date(st); // 指定时间
    date.setDate(date.getDate() + 1); // 将日期增加一天

    var date1 = new Date(); //开始时间
    var date2 = date; //结束时间
    var date3 = date2.getTime() - date1.getTime(); //时间差的毫秒数

    //计算出相差天数
    var days = Math.floor(date3 / (24 * 3600 * 1000));

    //计算时差
    var hours = Math.floor(date3 % (24 * 3600 * 1000) / (3600 * 1000));
    //计算分差
    var minutes = Math.floor(date3 % (24 * 3600 * 1000) % (3600 * 1000) / (60 * 1000));
    //计算秒差
    var seconds = Math.round( date3 % (24 * 3600 * 1000) % (3600 * 1000) % (60 * 1000) / 1000);
    return `${days}天${hours}时${minutes}分${seconds}秒`;
  }
  document.write(countTime("2023-10-08 16:05:06"));
</script>