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jQuery simulation explosion countdown function technology sharing

小云云Original: 2017-12-30 15:08:561803browse

This article mainly introduces you to the jQuery simulated explosion countdown function example code. It is very good. The code is simple and easy to understand. Friends who need it can refer to it. I hope it can help everyone better implement the jQuery simulated explosion countdown function.

HTML part

<!DOCTYPE html> 
<html lang="en"> 
<head> 
  <meta charset="UTF-8"> 
  <title>*倒计时</title> 
  <style type="text/css"> 
    .content { 
      width: 200px; 
      margin:0 auto; 
    } 
    .content .img1 { 
      /*添加*动画 第一值是动画名称 第二个值是动画的时间 第三个值时循环的次数，infinite为循环次数表示无限循环，用数值时则是循环次数*/ 
      animation: bounce 1s infinite; 
    } 
    .content .img2 { 
      animation: magnify 1s 1; 
    } 
    .btn { 
      font-size: 30px; 
      margin-left: 650px; 
    } 
    /*让*跳动*/ 
    @keyframes bounce{ 
      from{ 
        transform: scale(0.9); /*scale缩放*/ 
      }to{ 
        transform: scale(1.1); 
      } 
    } 
    /*让火花图片从小到大放大*/ 
    @keyframes magnify{ 
      from{ 
        transform: scale(0);/*为0时不显示*/ 
      }to{ 
        transform: scale(1); 
      } 
    } 
  </style> 
  <script type="text/javascript" src="js/jquery.min.js"></script> 
  <script type="text/javascript" src="js/index.js"></script> 
</head> 
<body> 
  <input type="button" class="btn" value="倒计时开始了，准备好了吗" /> 
  <p class="content"> 
    <!-- 用于显示倒计时秒数 --> 
    <p class="min"></p> 
    <!-- 存放爆炸前图片 --> 
    <img src="img/2007614223430291.png" class="img1" /> 
    <!-- 显示倒计时结束后的爆炸火花 --> 
    <img src="img/9d74c66b4d77c5aa5f61649a1383a31c9d9362b7a13f-wKrhDv_fw658.jpg" class="img2" /> 
  </p> 
</body> 
</html>

js code snippet

$(function(){ 
  //让图片内容先隐藏 
  $(".content").hide(); 
  //添加input点击事件 
  $(".btn").click(function(){ 
    //设置一个值用来表示从多少秒开始倒计时 
    var time=3; 
    //setInterval(function(){},1000)方法可按照指定的周期（以毫秒计）来调用函数或计算表达式,也就是会根据你给的时间执行事件 1000是毫秒=1秒 
    var set=setInterval(function(){ 
      //判断上面的time倒计时时间是否为0 
      if(time>0){ 
        //不为0时每过一秒就减一秒 
        $(".min").text(time-- +"(s)"); 
        //同时当倒计时不为0时，让content显示出来但火花图片隐藏 
        $(".content").show(); 
        $(".content .img2").hide(); 
      }else{//否则当倒计时=0时，倒计时结束，将数字与*隐藏，显示火花图片 .img1,p中 “,”是选择两个同级标签元素 
        $(".content .img1,p").hide(); 
        $(".content .img2").show(); 
      } 
    }, 1000); 
  }) 
})

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