js模仿微信朋友圈计算时间显示几天/几小时/几分钟/几秒之前

效果图：

代码如下：

<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title></title>
 </head>
 <body>
   <ul>
   <li class="one-comment">
     <a class="c-user-photo" href=""><img src=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img/user_photo.png" alt="" /></a>
     <div class="comment-info">
      <h3 class="userinfo clearfix"><a href="" class=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" name">大黄蜂</a><span class="fl-right tags"><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-reply">回复</a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-support">点赞</a></span></h3>
      <p class="time">2017-04-25 09:26:02</p>
      <p class="content">的确很漂亮啊，拍照技术越来越好了</p>
     </div>
    </li>
<li class="one-comment">
     <a class="c-user-photo" href=""><img src=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img/user_photo.png" alt="" /></a>
     <div class="comment-info">
      <h3 class="userinfo clearfix"><a href="" class=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" name">大黄蜂</a><span class="fl-right tags"><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-reply">回复</a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-support">点赞</a></span></h3>
      <p class="time">2017-04-22 09:26:02</p>
      <p class="content">的确很漂亮啊，拍照技术越来越好了</p>
     </div>
    </li>
 </li>
<li class="one-comment">
     <a class="c-user-photo" href=""><img src=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img/user_photo.png" alt="" /></a>
     <div class="comment-info">
      <h3 class="userinfo clearfix"><a href="" class=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" name">大黄蜂</a><span class="fl-right tags"><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-reply">回复</a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-support">点赞</a></span></h3>
      <p class="time">2017-04-26 17:50:02</p>
      <p class="content">的确很漂亮啊，拍照技术越来越好了</p>
     </div>
    </li>
 </li>
<li class="one-comment">
     <a class="c-user-photo" href=""><img src=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" img/user_photo.png" alt="" /></a>
     <div class="comment-info">
      <h3 class="userinfo clearfix"><a href="" class=" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" name">大黄蜂</a><span class="fl-right tags"><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-reply">回复</a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="f-support">点赞</a></span></h3>
      <p class="time">2017-04-26 09:26:02</p>
      <p class="content">的确很漂亮啊，拍照技术越来越好了</p>
     </div>
    </li>
   </ul>

  <script src="http://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script>
  <script type="text/javascript">
   //开发中我们需要计算一条动态的发布时间，一般我们得到的是一条日期字符串，我们需要计算当前时间和动态的发布时间，计算它们的差值来判断发布在什么时候
    //Date.parse() 解析一个日期时间字符串，并返回1970/1/1 午夜距离该日期时间的毫秒数
    //var nDays = Math.abs(parseInt((time2 - time1)/1000/3600/24));
    // 获取当前时间戳(以s为单位)
   function setTime(time,timeSelector){
   var currentTime = Date.parse(new Date());
   var dateTime = time;//后台传递来的时间
   var ts = timeSelector;//选择器
   var d_day = Date.parse(new Date(dateTime));
   var day = Math.abs(parseInt((d_day - currentTime)/1000/3600/24));//计算日期
   var hour = Math.abs(parseInt((d_day - currentTime)/1000/3600));//计算小时
   var minutes = Math.abs(parseInt((d_day - currentTime)/1000/60));//计算分钟
   var seconds = Math.abs(parseInt((d_day - currentTime)/1000));//计算秒
   console.log(day);
   if(day >= 2){
    ts.text(parseInt(day)+"天前").toString();
   }else if(day > 0 && day < 2){
    ts.text("昨天").toString();
   }else if(hour > 0 && hour < 24){
    ts.text(parseInt(hour)+"小时前").toString();
   }else if(minutes > 0 && minutes < 60){
    ts.text(parseInt(minutes)+"分钟前").toString();
   }else if(seconds > 0 && seconds < 60){
    ts.text(parseInt(seconds)+"秒前").toString();
   }
  }
   //列表里面调用方法，传递两个参数 数据库时间和选择器
  $(".one-comment").each(function(){
   var t_time = $(this).find(".time").text();
   var timeSelector = $(this).find(".time");
   setTime(t_time,timeSelector);
  })

  </script>
 </body>
</html>

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