JS实现仿微信支付弹窗功能

 
 
   
     
     
     
     
   
   
     
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body { 
        margin: 0; 
        padding: 0; 
        font-size: 0.3rem; 
        font-family: "微软雅黑", arial; 
      } 
      ul, 
      li { 
        margin: 0; 
        padding: 0; 
        list-style: none; 
      } 
      img { 
        display: block; 
      } 
      #myBtn { 
        display: block; 
        width: 80%; 
        height: auto; 
        margin: 5rem auto; 
        padding: 0.2rem; 
        border-radius: 5px; 
        border: 0; 
        outline: none; 
        font-family: "微软雅黑"; 
        color: #fff; 
        background-color: #5CB85C; 
      } 
      /* 弹窗 */ 
      .modal { 
        display: none; 
        /* 默认隐藏 */ 
        position: fixed; 
        z-index: 1; 
        left: 0; 
        top: 0; 
        width: 100%; 
        height: 100%; 
        overflow: auto; 
        background-color: rgb(0, 0, 0); 
        background-color: rgba(0, 0, 0, 0.4); 
        -webkit-animation-name: fadeIn; 
        -webkit-animation-duration: 0.4s; 
        animation-name: fadeIn; 
        animation-duration: 0.4s 
      } 
      /* 弹窗内容 */ 
      .modal-content { 
        position: fixed; 
        bottom: 0; 
        /*background-color: #fefefe;*/ 
        width: 100%; 
        -webkit-animation-name: slideIn; 
        -webkit-animation-duration: 0.4s; 
        animation-name: slideIn; 
        animation-duration: 0.4s 
      } 
      /** 
       * 支付弹窗样式 
       * **/ 
      .paymentArea-Entry { 
        width: 90%; 
        margin: 0 auto; 
        padding-bottom: 0.3rem; 
        background-color: #fff; 
      } 
      .paymentArea-Entry-Head { 
        display: flex; 
        display: -webkit-flex; 
        height: 0.8rem; 
        line-height: 0.8rem; 
        padding: 0.2rem; 
        border-bottom: 1px solid #5CB85C; 
      } 
      /* 关闭按钮 */ 
      .paymentArea-Entry-Head .close { 
        width: 0.5rem; 
        height: 0.5rem; 
        padding: 0.15rem 0.15rem 0.15rem 0; 
      } 
      .paymentArea-Entry-Head .close:hover, 
      .paymentArea-Entry-Head .close:focus { 
        color: #000; 
        text-decoration: none; 
        cursor: pointer; 
      } 
      .paymentArea-Entry-Head .useImg { 
        width: 0.8rem; 
        height: 0.8rem; 
        margin-right: 0.15rem; 
      } 
      .paymentArea-Entry-Head .tips-txt { 
        font-size: 0.4rem; 
      } 
      .paymentArea-Entry-Content { 
        position: relative; 
        padding: 0.2rem 0; 
        text-align: center; 
      } 
      .paymentArea-Entry-Content:after { 
        content: ""; 
        position: absolute; 
        bottom: 0; 
        left: 0.3rem; 
        right: 0.3rem; 
        height: 1px; 
        background-color: #ddd; 
      } 
      .paymentArea-Entry-Content .pay-name { 
        font-size: 0.3rem; 
      } 
      .paymentArea-Entry-Content .pay-price { 
        font-size: 0.4rem; 
        font-weight: bold; 
      } 
      ul.paymentArea-Entry-Row { 
        display: flex; 
        display: -webkit-flex; 
        justify-content: space-between; 
        margin: 0.2rem 0.3rem 0 0.3rem; 
        padding: 0; 
        border: 1px solid #a2a2a2; 
      } 
      ul.paymentArea-Entry-Row li { 
        position: relative; 
        flex-grow: 1; 
        min-width: 1rem; 
        height: 0.8rem; 
        line-height: 0.8rem; 
        text-align: center; 
        border-right: 1px solid #ddd; 
      } 
      ul.paymentArea-Entry-Row li:last-child { 
        border-right: 0; 
      } 
      ul.paymentArea-Entry-Row li img { 
        position: absolute; 
        top: 50%; 
        left: 50%; 
        width: 0.5rem; 
        height: 0.5rem; 
        margin: -0.25rem 0 0 -0.25rem; 
      } 
      .paymentArea-Keyboard { 
        margin-top: 1.2rem; 
        background-color: #fff; 
      } 
      .paymentArea-Keyboard h4 { 
        height: 0.5rem; 
        line-height: 0.5rem; 
        margin: 0; 
        text-align: center; 
      } 
      .paymentArea-Keyboard h4 img { 
        width: 0.93rem; 
        height: 0.32rem; 
        margin: 0 auto; 
      } 
      .paymentArea-Keyboard h4:active { 
        background-color: #e3e3e3; 
      } 
      .paymentArea-Keyboard ul { 
        border-top: 1px solid #ddd; 
      } 
      .paymentArea-Keyboard li { 
        display: flex; 
        display: -webkit-flex; 
        justify-content: space-between; 
        border-bottom: 1px solid #ddd; 
      } 
      .paymentArea-Keyboard li a { 
        flex-grow: 1; 
        display: block; 
        min-width: 1rem; 
        line-height: 1rem; 
        border-right: 1px solid #ddd; 
        font-size: 0.3rem; 
        text-align: center; 
        text-decoration: none; 
        color: #000; 
      } 
      .paymentArea-Keyboard li:last-child, 
      .paymentArea-Keyboard li a:last-child { 
        border: 0; 
      } 
      .paymentArea-Keyboard li a:active { 
        outline: none; 
        background-color: #ddd; 
      } 
      /* 添加动画 */ 
      @-webkit-keyframes slideIn { 
        from { 
          bottom: -300px; 
          opacity: 0 
        } 
        to { 
          bottom: 0; 
          opacity: 1 
        } 
      } 
      @keyframes slideIn { 
        from { 
          bottom: -300px; 
          opacity: 0 
        } 
        to { 
          bottom: 0; 
          opacity: 1 
        } 
      } 
      @-webkit-keyframes fadeIn { 
        from { 
          opacity: 0 
        } 
        to { 
          opacity: 1 
        } 
      } 
      @keyframes fadeIn { 
        from { 
          opacity: 0 
        } 
        to { 
          opacity: 1 
        } 
      } 

//定义根目录字体大小，通过rem实现适配 
      document.addEventListener("DOMContentLoaded", function() { 
        var html = document.documentElement; 
        var windowWidth = html.clientWidth; 
        //console.log(windowWidth) 
        html.style.fOntSize= windowWidth / 7.5 + "px"; 
      }, false); 
      // 获取弹窗 
      var modal = document.getElementById('myModal'); 
      // 打开弹窗的按钮对象 
      var btn = document.getElementById("myBtn"); 
      // 获取  元素，用于关闭弹窗 that closes the modal 
      var span = document.getElementsByClassName("close")[0]; 
      /*创建密码输入框*/ 
      var entryArea = document.querySelector(".paymentArea-Entry-Row"); 
      for(var i = 0; i <6; i++) { 
        var li = document.createElement("li"); 
        entryArea.appendChild(li); 
      } 
      /*键盘操作*/ 
      var doms = document.querySelectorAll('ul li a'); 
      var entryLis = document.querySelectorAll(".paymentArea-Entry-Row li"); 
      var pwds = ""; //存储密码 
      var count = 0; //记录点击次数 
      for(var i = 0; i  (x), 关闭弹窗 
      span.Onclick= function() { 
        modal.style.display = "none"; 
        if(count != 0) { 
          for(var i = 0; i