javascript实现移动端红包雨页面

时间：2021-08-08 08:25:11|栏目：JavaScript代码|点击：次

本文实例为大家分享了js实现移动端红包雨页面的具体代码，供大家参考，具体内容如下

实习的效果如下：

具体代码如下

html部分：

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <meta http-equiv="X-UA-Compatible" content="ie=edge">
 <title>红包雨</title>
 <link rel="stylesheet" href="./css/demo.css" >
 <link rel="stylesheet" href="./css/index.css" >
</head>
<body>
 <!-- 红包 -->
 <ul class="redPaper">
  <!-- <li>
   <a href="#" rel="external nofollow" ><img src="./images/hb_1.png" alt=""></a>
  </li> -->
 </ul>
 <div class="backward">
  <span></span>
 </div>
 <script src="./js/jquery.min.js"></script>
 <script src="./js/index.js"></script>
 <script>
  
 </script>
</body>
</html>

demo.css为初始化css,可以不加
index.css部分

body{
 width: 100%;
 height: 100%;
 background-image: url(../images/bj.jpg);
 background-repeat: no-repeat;
 background-size: cover;
 position: relative;
}
.redPaper{
 width: 100%;
 height: 100%;
 /* border: 1px solid black; */
 overflow: hidden;
}
.redPaper li {
 position: absolute;
 animation: all 3s linear;
 top:-100px;
 -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
.redPaper li a{
 display: block;
}
.backward{
 width: 100%;
 background:#ccc;
 opacity: 0.5;
 position: absolute;
 top: 0;
 
}
.backward span{
 display: inline-block;
 width: 100px;
 height: 100px;
 color: #000;
 font-weight: bold;
 position: absolute;
 top: 0;
 left: 0;
 right: 0;
 bottom: 0;
 margin: auto;
 text-align: center;
 line-height: 100px;
 font-size: 1000%;
}

index.js部分：

$(document).ready(function () {
 var win = (parseInt($('.redPaper').css('width'))) - 60;
 console.log(win)
 $(".redPaper").css("height", $(document).height());
 $(".backward").css("height", $(document).height());
 $("li").css({});
 // 点击确认的时候关闭模态层
 // $(".sen a").click(function(){
 // $(".mo").css("display", "none")
 // });

 var del = function () {
  nums++;
  //  console.info(nums);
  //  console.log($(".li" + nums).css("left"));
  $(".li" + nums).remove();
  setTimeout(del, 200)
 }

 var addRedPaper = function () {
  var hb = parseInt(Math.random() * (3 - 1) + 1);
  var randomW = parseInt(Math.random() * (70 - 30) + 20);
  var randomLeft = parseInt(Math.random() * win);
  var randomRotate = (parseInt(Math.random() * 45)) + 'deg';
  // console.log(rot)
  num++;
  $(".redPaper").append("<li class='li" + num + "' ><a href='javascript:;'><img src='images/hb_" + hb + ".png' data-num ='" + num + "'></a></li>");
  $(".li" + num).css({
   "left": randomLeft,
  });
  $(".li" + num + " a img").css({
   "width": randomW,
   "transform": "rotate(" + randomRotate + ")",
   "-webkit-transform": "rotate(" + randomRotate + ")",
   "-ms-transform": "rotate(" + randomRotate + ")", /* Internet Explorer */
   "-moz-transform": "rotate(" + randomRotate + ")", /* Firefox */
   "-webkit-transform": "rotate(" + randomRotate + ")",/* Safari 和 Chrome */
   "-o-transform": "rotate(" + randomRotate + ")" /* Opera */
  });
  $(".li" + num).animate({ 'top': $(window).height() + 20 }, 5000, function () {
   //删掉已经显示的红包
   this.remove()
  });
  //点击红包的时候弹出模态层
  $(".li" + num).click(function (e) {
   if (e.target.tagName == 'IMG') {
    console.log(e.target.dataset.num)
   }

  });
  setTimeout(addRedPaper, 200)
 }

 //增加红包
 var num = 0;
 setTimeout(addRedPaper, 3000);

 //倒数计时
 var backward = function () {
  numz--;
  if (numz > 0) {
   $(".backward span").html(numz);
  } else {
   $(".backward").remove();
  }
  setTimeout(backward, 1000)

 }

 var numz = 4;
 backward();

})

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