Javascript - 更改countDown計時器countUp時間

Question

我有和html計算了我的活動的日子，現在事件結束，計數器顯示的天數爲負數。我如何使現有的JS代碼計數。我對學習html和js相當陌生，並且非常感謝您的知識。

下面是從外部鏈路JS文件的代碼：

/*-----Countdown timer created by webnesters.com-------*/ 
 
jQuery.fn.CountingDown = function(options) { 
 
\t var settings = jQuery.extend({ 
 
\t \t 'date': null 
 
\t }, 
 
\t options); 
 
\t myp=jQuery(this); 
 
\t function calculate_time(){ 
 
\t \t var future = Date.parse(settings[ 
 
\t \t \t 'date' 
 
\t \t ]); 
 
    var now = new Date(); 
 
\t 
 
    var difference = Math.floor((future - now)/1000); 
 
    var seconds = chkinteger(difference % 60); 
 
\t 
 
    difference = Math.floor(difference/60); 
 
    var minutes = chkinteger(difference % 60); 
 
\t 
 
    difference = Math.floor(difference/60); 
 
    var hours = chkinteger(difference % 24); 
 
\t 
 
    difference = Math.floor(difference/24); 
 
    var days = difference; 
 

 
\t if(days.toString().length==1){ 
 
\t \t days='0'+days; 
 
\t } 
 
    myp.find("#seconds").text(seconds); 
 
    myp.find("#minutes").text(minutes); 
 
    \t myp.find("#hours").text(hours); 
 
    \t myp.find("#days").text(days); 
 
\t } 
 
\t 
 
\t function chkinteger(integer) 
 
\t { 
 
\t \t if (integer < 0) 
 
     integer = 0; 
 
    if (integer < 10) 
 
     return "0" + integer; 
 
    return "" + integer; 
 
\t } 
 
\t calculate_time(); 
 
\t interval = setInterval(calculate_time,1000); 
 
};

下面是從HTML的代碼：

<h4>12 november 2016</h4> 

      <div class="countdown-container" id="countdown"> 
       <div class="countdown-box-wrap-year"> 
        <div class="countdown-box"> 
         <div class="countdown-box-border-year"> 
         </div> 
              <div class="countdown-box-border-year2"> 
         </div> 

         <span id="days">00</span> 
        </div> 
        <strong>Days</strong> 
       </div> 
       <div class="countdown-box-wrap"> 
        <div class="countdown-box"> 
         <div class="countdown-box-border"> 
         </div> 
         <span id="hours">00</span> 
        </div> 
        <strong>Hours</strong> 
       </div> 
       <div class="countdown-box-wrap"> 
        <div class="countdown-box"> 
         <div class="countdown-box-border"> 
         </div> 
         <span id="minutes">00</span> 
        </div> 
        <strong>Minutes</strong> 
       </div> 
       <div class="countdown-box-wrap"> 
        <div class="countdown-box"> 
         <div class="countdown-box-border"> 
         </div> 
         <span id="seconds">00</span> 
        </div> 
        <strong>Seconds</strong> 
       </div> 
      </div> 
      <script type="text/javascript"> 
      jQuery(document).ready(function(){ 
       jQuery("#countdown").CountingDown({ 
        date: "12 november 2016 14:00:00" // Enter your countdown date and time 
       }); 
      }); 
</script> 

Answer 1

這條線：

var difference = Math.floor((future - now)/1000); 

變爲：

var difference = Math.floor((now - future)/1000); 

發生了什麼事？我們爲需要時間直到未來日期（將來減去現在=剩餘時間）。

我們現在想因爲時間該日期（現減去未來[順便說一句，現在過去] =時間流逝）。