<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<style>
.login {
position: fixed;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
z-index: 1;
display: none;
background-color: blue;
width: 300px;
height: 200px;
}
.login_bg {
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, .3);
position: fixed;
top: 0;
left: 0;
display: none;
}
.title {
width: 100%;
height: 50px;
cursor: move;
background-color: #333;
}
</style>
<title>Document</title>
</head>
<body>
<button>点我</button>
<div class="login">
<div class="title">
<span>关闭</span>
</div>
</div>
<div class="login_bg"></div>
<script>
$(function () {
var login = $('.login');
var loginBg = $('.login_bg')
var btn = $('button')
var close = $('span')
var title = $('.title')
btn.click(function () {
login.css('display', 'block')
loginBg.css('display', 'block')
})
close.click(function () {
login.css('display', 'none')
loginBg.css('display', 'none')
})
title.mousedown(function (e) {
let x = e.pageX - title.offset().left
let y = e.pageY - title.offset().top
$(document).mousemove(function (e) {
login.css({ 'transform': 'translate(0)' })
login.css({ 'left': e.pageX - x + 'px', 'top': e.pageY - y + 'px' })
$(document).mouseup(function (e) {
$(document).unbind()
})
})
})
})
</script>
</body>
</html>
