Examples to explain the effect of multiple js millisecond countdowns at the same time

Examples to explain the effect of multiple js millisecond countdowns at the same time_javascript skills

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Release： 2016-05-16 15:21:59

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The example in this article explains the code of js millisecond countdown and simultaneous effect, and shares it with everyone for your reference. The specific content is as follows

Rendering:

Implementation function: call a function, pass in the id of the html element, and a deadline (unix timestamp), and print out the countdown to the current deadline in the html element, accurate to milliseconds;

The rendering is as follows:

<!DOCTYPE html>
<html>

  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title></title>
    <style>
      div{
        width: 100%;
        height: 50px;
        margin-bottom: 5px;
        background: yellowgreen;
      }
    </style>
  </head>

  <body>
    
    <h2>毫秒的倒计时</h2>
    <div id="timer1"></div>
    <div id="timer2"></div>
    <div id="timer3"></div>
    <div id="timer4"></div>
    <script>
      var addTimer = function(){
        var list = [],
          interval;
          
        return function(id,timeStamp){
          if(!interval){
            interval = setInterval(go,1);
          }
          list.push({ele:document.getElementById(id),time:timeStamp});
        }
        
        function go() { 
          for (var i = 0; i < list.length; i++) { 
            list[i].ele.innerHTML = changeTimeStamp(list[i].time); 
            if (!list[i].time) 
              list.splice(i--, 1); 
          } 
        }

        //传入unix时间戳，得到倒计时
        function changeTimeStamp(timeStamp){
          var distancetime = new Date(timeStamp*1000).getTime() - new Date().getTime();
          if(distancetime > 0){ 
　　　　　　　　　　　　　　//如果大于0.说明尚未到达截止时间       
            var ms = Math.floor(distancetime%1000);
            var sec = Math.floor(distancetime/1000%60);
            var min = Math.floor(distancetime/1000/60%60);
            var hour =Math.floor(distancetime/1000/60/60%24);
            
            if(ms<100){
              ms = "0"+ ms;
            }
            if(sec<10){
              sec = "0"+ sec;
            }
            if(min<10){
              min = "0"+ min;
            }
            if(hour<10){
              hour = "0"+ hour;
            }
            
            return hour + ":" +min + ":" +sec + ":" +ms;
          }else{
　　　　　　　　　　　　　　//若否，就是已经到截止时间了
            return "已截止！"
          }  
        }        
      }();
      
      addTimer("timer1",1451923200);//1月5日00点，unix时间戳自己去百度一下，就有的
      addTimer("timer2",1451926800);//1月5日01点
      addTimer("timer3",1451930400);//1月5日02点
      addTimer("timer4",1452020400);//1月6日03点

    </script>
    
  </body>

</html>

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How to use this function?

addTimer("#id", timestamp int);

PS:

Actually, this function has a small problem: it does not display the deadline; because the boss said that our countdown time is only a few hours at most, so I am too lazy to judge the hours and days of the countdown. So many. So if the incoming timestamp is more than 1 day ago. Then you will see the result like this: 02:11:32:874~~Only 2 hours left! It's obviously wrong, isn't it?

so, there are 2 options here:

Method 1: Change var hour =Math.floor(distancetime/1000/60/60%24); to var hour =Math.floor(distancetime/1000/ 60/60);

If the deadline is more than one day ago, the hour position will display a number greater than 24; for example: 36:45:22:888

Method 2: Write another variable to calculate the number of days;

The above is the entire content of this article, I hope it will be helpful to everyone’s study.