- 技术
- 让我们用原生JS来搞定元素的自由拖拽
JS原生实现元素的拖拽
页面样式
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
.login-header {
width: 100%;
text-align: center;
height: 30px;
font-size: 24px;
line-height: 30px;
}
ul,
li,
ol,
dl,
dt,
dd,
div,
p,
span,
h1,
h2,
h3,
h4,
h5,
h6,
a {
padding: 0px;
margin: 0px;
}
.login {
width: 512px;
position: absolute;
border: #ebebeb solid 1px;
height: 280px;
left: 50%;
right: 50%;
background: #ffffff;
box-shadow: 0px 0px 20px #ddd;
z-index: 9999;
margin-left: -250px;
margin-top: 140px;
display: none;
}
.login-title {
width: 100%;
margin: 10px 0px 0px 0px;
text-align: center;
line-height: 40px;
height: 40px;
font-size: 18px;
position: relative;
cursor: move;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
-khtml-user-select: none;
user-select: none;
}
.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 {
width: 100%;
height: 100%;
position: fixed;
top: 0px;
left: 0px;
background: #000000;
filter: alpha(opacity=30);
-moz-opacity: 0.3;
-khtml-opacity: 0.3;
opacity: 0.3;
display: none;
}
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;
}
</style>
</head>
<body>
<div class="login-header"><a id="link" href="javascript:void(0);">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>
<div id="bg" class="login-bg"></div>
</body>
</html>
脚本文件
function my$(id
) {
return document
.getElementById(id
);
}
my$("link").onclick = function (e
) {
my$("login").style
.display
= "block";
my$("bg").style
.display
= "block";
e
.stopPropagation();
console
.log('出现');
};
my$("closeBtn").onclick = function () {
my$("login").style
.display
= "none";
my$("bg").style
.display
= "none";
};
my$("title").onmousedown = function (e
) {
var spaceX
= e
.clientX
- my$("login").offsetLeft
;
var spaceY
= e
.clientY
- my$("login").offsetTop
;
document
.onmousemove = function (e
) {
var bodyW
= document
.documentElement
.clientWidth
var bodyH
= document
.documentElement
.clientHeight
var loginH
= my$('login').offsetHeight
var loginW
= my$('login').offsetWidth
var btnH
= my$('closeBtn').parentNode
.offsetHeight
/ 2
var btnW
= my$('closeBtn').parentNode
.offsetWidth
/ 2
var loginX
, loginY
if (e
.clientX
- spaceX
<= 0) {
loginX
= 0
} else if (e
.clientX
- spaceX
> 0 && e
.clientX
- spaceX
<= bodyW
- loginW
- btnW
) {
loginX
= e
.clientX
- spaceX
} else {
loginX
= bodyW
- loginW
- btnW
}
if (e
.clientY
- spaceY
<= btnH
) {
loginY
= btnH
} else if (e
.clientY
- spaceY
> 0 && e
.clientY
- spaceY
<= bodyH
- loginH
) {
loginY
= e
.clientY
- spaceY
} else {
loginY
= bodyH
- loginH
}
var x
= loginX
+ 250
var y
= loginY
- 140
my$('login').style
.left
= x
+ 'px'
my$('login').style
.top
= y
+ 'px'
}
}
document
.onmouseup = function () {
document
.onmousemove
= null;
};
示例演示
Processed:
0.030, SQL:
9
