CodePen Embed - 模态框拖拽

Live

 
<div class="login-header"><a id="link" href="javascript:;">点击，弹出登录框</a></div>
<div id="login" class="login">
  <div id="title" class="login-title">登录会员
    <span><a id="closeBtn" href="javascript:void(0);" class="close-login">关闭</a></span>
  </div>
  <div class="login-input-content">
    <div class="login-input">
      <label>用户名：</label>
      <input type="text" placeholder="请输入用户名" name="info[username]" id="username" class="list-input">
    </div>
    <div class="login-input">
      <label>登录密码：</label>
      <input type="password" placeholder="请输入登录密码" name="info[password]" id="password" class="list-input">
    </div>
  </div>
  <div id="loginBtn" class="login-button"><a href="javascript:void(0);" id="login-button-submit">登录会员</a></div>
</div>
<!-- 遮盖层 -->
<div id="bg" class="login-bg"></div>

Live

​x
 
* {
  padding: 0px;
  margin: 0px;
}
.login-header {
  width: 100%;
  text-align: center;
  height: 30px;
  font-size: 24px;
  line-height: 30px;
}
​
.login {
  display: none;
  width: 512px;
  height: 280px;
  position: fixed;
  border: #ebebeb solid 1px;
  left: 50%;
  top: 50%;
  background: #ffffff;
  box-shadow: 0px 0px 20px #ddd;
  z-index: 9999;
  transform: translate(-50%, -50%);
}
​
.login-title {
  width: 100%;
  margin: 10px 0px 0px 0px;
  text-align: center;
  line-height: 40px;
  height: 40px;
  font-size: 18px;
  position: relative;
  cursor: move;
}
​
.login-input-content {
  margin-top: 20px;
}
​
.login-button {
  width: 50%;
  margin: 30px auto 0px auto;
  line-height: 40px;
  font-size: 14px;
  border: #ebebeb 1px solid;
  text-align: center;
}
​
.login-bg {
  display: none;
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0px;
  left: 0px;
  background: rgba(0, 0, 0, 0.3);
}
​
a {
  text-decoration: none;
  color: #000000;
}
​
.login-button a {
  display: block;
}
​
.login-input input.list-input {
  float: left;
  line-height: 35px;
  height: 35px;
  width: 350px;
  border: #ebebeb 1px solid;
  text-indent: 5px;
}
​
.login-input {
  overflow: hidden;
  margin: 0px 0px 20px 0px;
}
​
.login-input label {
  float: left;
  width: 90px;
  padding-right: 10px;
  text-align: right;
  line-height: 35px;
  height: 35px;
  font-size: 14px;
}
​
.login-title span {
  position: absolute;
  font-size: 12px;
  right: -20px;
  top: -30px;
  background: #ffffff;
  border: #ebebeb solid 1px;
  width: 40px;
  height: 40px;
  border-radius: 20px;
}
​

Live

xxxxxxxxxx
 
// 1. 获取元素
var login = document.querySelector(".login");
var mask = document.querySelector(".login-bg");
var link = document.querySelector("#link");
var closeBtn = document.querySelector("#closeBtn");
var title = document.querySelector("#title");
// 2. 点击弹出层这个链接 link  让mask 和login 显示出来
link.addEventListener("click", function () {
  mask.style.display = "block";
  login.style.display = "block";
});
// 3. 点击 closeBtn 就隐藏 mask 和 login
closeBtn.addEventListener("click", function () {
  mask.style.display = "none";
  login.style.display = "none";
});
// 4. 开始拖拽
// (1) 当我们鼠标按下， 就获得鼠标在盒子内的坐标
title.addEventListener("mousedown", function (e) {
  var x = e.pageX - login.offsetLeft;
  var y = e.pageY - login.offsetTop;
  // (2) 鼠标移动的时候，把鼠标在页面中的坐标，减去 鼠标在盒子内的坐标就是模态框的left和top值
  document.addEventListener("mousemove", move);
​
  function move(e) {
    login.style.left = e.pageX - x + "px";
    login.style.top = e.pageY - y + "px";
  }
  // (3) 鼠标弹起，就让鼠标移动事件移除
  document.addEventListener("mouseup", function () {
    document.removeEventListener("mousemove", move);
  });
});
​

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