JavaScript 使用类封装 Pop 弹窗组件的实现方法

<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="UTF-8">
  <title></title>
  <style>
    /*基本的样式*/
    button{width: 1.6rem;height: 0.5rem;font-size: 0.3rem;line-height: 0.5rem;background: red;color: white;font-weight: bold}
    .hide{display: none;}
    .js-pop{
      width: 100%;
      height: 100%;
      z-index: 100;
      position: absolute;
      top:0;
      left: 0;
      font-size: 0.24rem;
    }
    .js-pop .mask{
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: #000;
      opacity: 0.2;
    }
    .js-pop .content{
      position: fixed;
      top: 50%;
      left: 50%;
      width: 5.80rem;
      height: 4.81rem;
      margin: -2.405rem 0 0 -2.9rem;
      background: url("pop-bg.png") no-repeat;
      background-size: contain;
      color: #262626;
      text-align: center;
    }
    .js-pop .content .close{
      position: absolute;
      top: .25rem;
      right: .08rem;
      width: .54rem;
      height: .48rem;
      z-index: 4;
      cursor:pointer;
    }
    .js-pop .content .prize-title {
      height: .39rem;
      min-width: 1.77rem;
      margin: .28rem auto;
      line-height: 0.39rem;
      color: white;
      text-align: left;
      text-indent: 1rem;
    }
    .js-pop .content .prize-content {
      color: #a40000;
      font-size: .24rem;
      margin:0 0.1rem 0 0.49rem;
      line-height: 0.4rem;
      width: 5.2rem;
    }
  </style>
</head>
<body>
<button id="bb">显示弹窗</button>
<div class="js-pop js-prize-pop hide" id="popLogin">
  <div class="mask"></div>
  <div class="content">
    <div class="close"></div>
    <div class="prize-title">温馨提示</div>
    <div class="prize-content" style="margin-top: 1rem">
      登录后才能参与活动哦！
      <br/>
      自动登录跳转中......
    </div>
  </div>
</div>
<!--引入jquery-->
<script type="text/javascript" src="http://image.37wan.cn/common/js/jquery-1.9.1.min.js"></script>
<!--引入Pop组件-->
<script src="pop.js"></script>
<script>
//  rem代码
  var windowW = $(window).width();
  var ratio = windowW/640;
  $("html").css("fontSize",100*ratio+"px");
  $(window).on("resize",function(){
    var windowW = $(window).width();
    var ratio = windowW/640;
    $("html").css("fontSize",100*ratio+"px");
  });
//new一个Pop实例
  var popLogin=new Pop($("#popLogin"));
  $("#bb").on("click",function(){
    popLogin.open();
  });

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

//Pop的构造函数
  var Pop=function(wrap,option){
    var $this=this;
    var opt={
      closeCall:null
    };
    $.extend(opt,option);
    var mask=wrap.find(".mask");
    //特权方法：1、open()；2、close()；3、setPrize（）；4、setContent（）控制弹窗内显示的内容
    this.open=function(){
      wrap.show();
      mask.show();
    };
    this.close=function(callbalck){
      wrap.hide();
      mask.hide();
      opt.closeCall&&callbalck();
    };
    this.setPrize=function(text){
      wrap.find(".js-prize").text(text);
    };
    this.setContent = function (text) {
      wrap.find(".js-content").text(text);
    };
    function events(){
      wrap.on("click",".close",function(e){
        e.stopPropagation();
        $this.close(opt.closeCall);
      });
    }
    events();
  };