弹窗案例
1.首页代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>综合案例</title>
<style>
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,body{
width: 100%;
height: 100%;
}
.container{
width: 100%;
height: 100%;
background-color: #f2f1f2;
}
header{
width: 1200px;
height: 50px;
background-color: #fff;
margin: 0 auto;
display: flex;
justify-content: space-between;
align-items: center;
}
header div:nth-of-type(2){
display: flex;
gap: 20px;
cursor: pointer;
}
header div:nth-of-type(2) span:hover{
font-weight: bolder;
color: red;
}
.login-box{
display: none;
overflow: hidden;
width: 300px;
height: 200px;
background-color: #fff;
border: solid 1px orangered;
border-radius: 8px;
box-shadow: rgba(255,0,0,0.5) 5px 5px 5px;
position: absolute;
left: 1150px;
top: 50px;
}
.login-box .header{
height: 40px;
background-color: orangered;
display: flex;
justify-content: space-between;
align-items: center;
color: white;
cursor: pointer;
padding: 0 10px;
}
</style>
</head>
<body>
<div class="container">
<header>
<div>
<span>欢迎访问OPENLAB EDU</span>
</div>
<div>
<span id="login">登录</span>
<span id="register">注册</span>
</div>
<div class="login-box" id="login-box">
<div class="header" id="header">
<span>会员登录</span>
<span id="close">[关闭]</span>
</div>
</div>
</header>
</div>
<script>
let _login=document.getElementById("login");
let _login_box=document.getElementById("login-box");
_login.onclick=function(){
_login_box.style.display="block";
}
let _close=document.getElementById("close");
_close.onclick=function(){
_login_box.style.display="none";
}
let _header=document.getElementById("header");
document.onmousedown=function(event){
let offsetX=event.offsetX;
let offsetY=event.offsetY;
_header.onmousemove=function(event2){
let mouseX=event2.clientX;
let mouseY=event2.clientY;
let loginX=mouseX-offsetX;
let loginY=mouseY-offsetY;
if(loginX<=0){
loginX=0;
}
if(loginY<=0){
loginY=0;
}
let iw=window.innerWidth;
let lw=getComputedStyle(_login_box).width;
lw=parseInt(lw);
if(loginX>=(iw-lw)){
loginX=iw-lw;
}
let ih=window.innerHeight;
let lh=getComputedStyle(_login_box).height;
lh=parseInt(lh);
if(loginY>=(ih-lh)){
loginY=ih-lh;
}
_login_box.style.left=loginX+"px";
_login_box.style.top=loginY+"px";
}
}
document.onmouseup=function(){
_header.onmousemove=null;
}
</script>
</body>
</html>2.展示效果
