Question

我有这个倒数计时器JavaScript代码，但每次刷新浏览器时它都会重新启动我想让它倒计时到某个特定的日期我怎样才能做到这一点？

function getTimeRemaining(endtime) {
  var t = Date.parse(endtime) - Date.parse(new Date());
  var seconds = Math.floor((t / 1000) % 60);
  var minutes = Math.floor((t / 1000 / 60) % 60);
  var hours = Math.floor((t / (1000 * 60 * 60)) % 24);
  var days = Math.floor(t / (1000 * 60 * 60 * 24));
  return {
    'total': t,
    'days': days,
    'hours': hours,
    'minutes': minutes,
    'seconds': seconds
  };
}

function initializeClock(id, endtime) {
  var clock = document.getElementById(id);
  var daysSpan = clock.querySelector('.days');
  var hoursSpan = clock.querySelector('.hours');
  var minutesSpan = clock.querySelector('.minutes');
  var secondsSpan = clock.querySelector('.seconds');

  function updateClock() {
    var 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();
  var timeinterval = setInterval(updateClock, 1000);
}

var deadline = new Date(Date.parse(new Date()) + 21 * 24 * 60 * 60 * 1000);
initializeClock('clockdiv', deadline);

<div id="clockdiv">
  <span class="days"></span>
  <span class="hours"></span>
  <span class="minutes"></span>
  <span class="seconds"></span>
</div>

Answer 1

也许是因为每次刷新浏览器时结束时间都是相同的，以防您在当前时间添加21天。所以每次你有21天的间隔。要解决此问题，请设置固定时间，如Date.parse('2018-01-11 20:00:00')。

Answer 2

正确更新@ChrisG

 function getTimeRemaining(endtime) {
        var t = Date.parse(endtime) - Date.parse(new Date());
        var seconds = Math.floor((t / 1000) % 60);
        var minutes = Math.floor((t / 1000 / 60) % 60);
        var hours = Math.floor((t / (1000 * 60 * 60)) % 24);
        var days = Math.floor(t / (1000 * 60 * 60 * 24));
        return {
            'total': t,
            'days': days,
            'hours': hours,
            'minutes': minutes,
            'seconds': seconds
        };
    }

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

        function updateClock() {
            var 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();
        var timeinterval = setInterval(updateClock, 1000);
    }

    var deadline = "2018-01-30T12:00:00-0500";
    initializeClock('clockdiv', deadline);

倒计时到具体日期

2 个答案: