JQ模拟六位密码支付效果

内容简介

利用JQ模拟六位密码支付效果，效果如下图：

实现过程

功能比较简单，代码如下，主要功能都有注释：

body {
  margin: 0;
  padding: 0;
  background-color: #c7c8ca;
}

.pop-box {
  display: none;
}

.pop-box .mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1;
}

.pwd-wrapper {
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  width: 280px;
  height: 160px;
  margin-left: -140px;
  margin-top: -80px;
  border-radius: 7px;
}

.pwd-top {
  padding: 25px 0 35px;
}

.pwd-top .title {
  text-align: center;
  color: #333;
  font-size: 16px;
}

.pwd-top img {
  width: 15px;
  height: 15px;
  position: absolute;
  top: 14px;
  right: 14px;
}

.pwd-box {
  width: 224px;
  position: relative;
  border: 1px solid #E5E5E5;
  overflow: hidden;
  margin: 0 auto;
}

.pwd-box input[type="number"] {
  width: 100%;
  height: 36.5px;
  position: absolute;
  top: 0;
  left: 0;
  border: 0;
  font-size: 18px;
  opacity: 0;
  z-index: 1;
  letter-spacing: 30px;
  padding: 0;
}

.fake-box input {
  padding: 0;
  width: 36.5px;
  height: 36.5px;
  border: 0;
  border-right: 1px solid #E5E5E5;
  text-align: center;
  font-size: 30px;
  background-color: transparent;
  float: left;
}

.fake-box input:nth-last-child(1) {
  border: 0;
}

.button {
  width: 224px;
  height: 42px;
  line-height: 42px;
  color: #fff;
  background-color: #2B86E3;
  border-radius: 5px;
  text-align: center;
  margin: 20px auto 0;
}

<!DOCTYPE html>
<html>

<head>
  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <meta name="renderer" content="webkit">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,Chrome=1" />
  <title>6位密码弹窗</title>
  <link rel="shortcut icon" href="#" />
  <link rel="stylesheet" href="./css/style.css" />
</head>

<body>
  <div class="button showPop">点击显示弹窗</div>
  <div class="pop-box">
    <div class="mask"></div>
    <div class="pwd-wrapper">
      <div class="pwd-top">
        <div class="title">请输入支付密码</div>
        <img class="close" src="images/close.png" alt="" />
      </div>
      <div class="pwd-box">
        <input type="number" maxlength="6" class="pwd-input" id="pwd-input" oninput="if(value.length>6) value=value.slice(0,6)" />
        <div class="fake-box">
          <input type="password" readonly="" />
          <input type="password" readonly="" />
          <input type="password" readonly="" />
          <input type="password" readonly="" />
          <input type="password" readonly="" />
          <input type="password" readonly="" />
        </div>
      </div>
    </div>
  </div>
  <script src="./js/jquery-1.11.0.min.js"></script>
  <script>
  $(function() {
    var $inputs = $(".fake-box input");

    // 点击显示弹窗
    $('.showPop').click(function(event) {
      $('.pop-box').fadeIn('slow');
      $("#pwd-input").focus();
    });
    // 点击关闭弹窗
    $('.mask, .close').click(function(event) {
      $('.pop-box').fadeOut('fast');
      clearPwd($inputs);
    });
    
    // 加载显示密码函数
    showPwd($inputs);

    // 点击弹窗
    $('.pwd-wrapper').click(function(event) {
      $("#pwd-input").focus();
    });
  });
  // 显示六位密码
  function showPwd($inputs) {    
    $("#pwd-input").on("input", function() {
      var pwd = $(this).val().trim();
      // 渲染到密码框
      for (var i = 0, len = pwd.length; i < len; i++) {
        $inputs.eq(i).val(pwd[i]);
      }
      // 用于处理回退的问题
      $inputs.each(function() {
        var index = $(this).index();
        if (index >= len) {
          $(this).val("");
        }
      });
      // 输入6位执行其他操作
      if (len == 6) {
        // console.log(pwd);
        $('.mask, .close').trigger('click');
      }
    });
  }
  // 清除输入数据
  function clearPwd($inputs) {
    $("#pwd-input").val("");
    $inputs.each(function() {
      $(this).val("");
    });
  }
</script>
</body>

</html>