javascript 中的倒数计时器，只有天数、小时数、分钟数 - 去掉秒数

Question

说到 javascript 我才刚刚开始学习，我是菜鸟。我一直在尝试为我的网站编写一个计时器，我发现了一些有助于这样做的代码，但我想摆脱秒数的显示。

这是我正在使用的 javascript 代码：

  const total = Date.parse(endtime) - Date.parse(new Date());
  const seconds = Math.floor((total / 1000) % 60);
  const minutes = Math.floor((total / 1000 / 60) % 60);
  const hours = Math.floor((total / (1000 * 60 * 60)) % 24);
  const days = Math.floor(total / (1000 * 60 * 60 * 24));

  return {
    total,
    days,
    hours,
    minutes,
    seconds
  };
}

function initializeClock(id, endtime) {
  const clock = document.getElementById(id);
  const daysSpan = clock.querySelector('.days');
  const hoursSpan = clock.querySelector('.hours');
  const minutesSpan = clock.querySelector('.minutes');
  const secondsSpan = clock.querySelector('.seconds');

  function updateClock() {
    const t = getTimeRemaining(endtime);

    daysSpan.innerHTML = t.days;
    hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
    minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);
    secondsSpan.innerHTML = ('0' + t.seconds).slice(-2);

    if (t.total <= 0) {
      clearInterval(timeinterval);
    }
  }

  updateClock();
  const timeinterval = setInterval(updateClock, 1000);
}

const deadline = new Date(Date.parse(new Date()) + 30 * 24 * 60 * 60 * 1000);
initializeClock('clockdiv', deadline);

这是与之关联的 html 代码：

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Timer</title>
  <link rel = "stylesheet"
   type = "text/css"
   href = "style.css" />
  <script src="javascript.js" defer></script>
</head>
<body>
<h1>Preorders end in:</h1>
<div id="clockdiv">
  <div>
    <span class="days"></span>
    <div class="smalltext">Days</div>
  </div>
  <div>
    <span class="hours"></span>
    <div class="smalltext">Hours</div>
  </div>
  <div>
    <span class="minutes"></span>
    <div class="smalltext">Minutes</div>
  </div>
  <div>
    <span class="seconds"></span>
    <div class="smalltext">Seconds</div>
  </div>
</div>
</body>
</html>

有没有办法快速解决这个问题？

如有任何帮助，我们将不胜感激！

非常感谢，

G

Answer 1

在 Javascript 中，删除所有涉及 seconds 和 secondsSpan 的行。在 HTML 中删除 <div id="clockdiv"> 中的最后一个 <div>。

那会让你：

JS

function getTimeRemaining(endtime) {
  const total = Date.parse(endtime) - Date.parse(new Date());
  const minutes = Math.floor((total / 1000 / 60) % 60);
  const hours = Math.floor((total / (1000 * 60 * 60)) % 24);
  const days = Math.floor(total / (1000 * 60 * 60 * 24));

  return {
    total,
    days,
    hours,
    minutes
  };
}

function initializeClock(id, endtime) {
  const clock = document.getElementById(id);
  const daysSpan = clock.querySelector('.days');
  const hoursSpan = clock.querySelector('.hours');
  const minutesSpan = clock.querySelector('.minutes');

  function updateClock() {
    const t = getTimeRemaining(endtime);

    daysSpan.innerHTML = t.days;
    hoursSpan.innerHTML = ('0' + t.hours).slice(-2);
    minutesSpan.innerHTML = ('0' + t.minutes).slice(-2);

    if (t.total <= 0) {
      clearInterval(timeinterval);
    }
  }

  updateClock();
  const timeinterval = setInterval(updateClock, 1000);
}

const deadline = new Date(Date.parse(new Date()) + 30 * 24 * 60 * 60 * 1000);
initializeClock('clockdiv', deadline);

HTML

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Timer</title>
  <link rel="stylesheet" type="text/css" href="style.css" />
  <script src="javascript.js" defer></script>
</head>

<body>
  <h1>Preorders end in:</h1>
  <div id="clockdiv">
    <div>
      <span class="days"></span>
      <div class="smalltext">Days</div>
    </div>
    <div>
      <span class="hours"></span>
      <div class="smalltext">Hours</div>
    </div>
    <div>
      <span class="minutes"></span>
      <div class="smalltext">Minutes</div>
    </div>
  </div>
</body>

</html>

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