1、思路分析
- 鼠标移入菜单出现并翻转
- 鼠标移出收回菜单
2、完整代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>翻转菜单-综合练习</title>
<style>
*{
margin: 0;
padding: 0;
}
.nav{
width: 400px;
height: 40px;
background-color: #3c3c3c;
color: white;
margin: 0 auto;
line-height: 50px;
margin-top: 100px;
}
div{
width: 400px;
height: 300px;
box-sizing: border-box;
border: 1px solid #000;
background-color: pink;
margin: 0 auto;
}
.nav>li{
width: 120px;
line-height: 40px;
text-align: center;
box-sizing: border-box;
background-color: grey;
float: left;
margin-left: 10px;
position: relative;
}
ul li{
width: 80px;
height: 40px;
display: inline-block;
}
/*.sub{*/
/*display: none;*/
/*}*/
.sub{
left: 0;
top: 40px;
}
.sub li{
width: 120px;
height: 40px;
display: inline-block;
list-style: none;
background-color: rgba(0,0,0,0.7);
transform: rotateY(180deg);
transition: all 1s;
opacity: 0;
}
.nav>li:hover .sub li{
/*透明度*/
opacity: 1;
}
.nav>li:hover .sub li{
transform: none;
}
.nav>li:hover .sub li:nth-child(1) {
transition-delay: 0s;
}
.nav>li:hover .sub li:nth-child(2){
transition-delay: 0.2s;
}
.nav>li:hover .sub li:nth-child(3){
transition-delay: 0.4s;
}
.nav>li:hover .sub li:nth-child(4){
transition-delay: 0.6s;
}
.nav>li:hover .sub li:nth-child(5){
transition-delay: 0.8s;
}
.nav>li .sub li:nth-child(1) {
transition-delay: 0.8s;
}
.nav>li .sub li:nth-child(2){
transition-delay: 0.6s;
}
.nav>li .sub li:nth-child(3){
transition-delay: 0.4s;
}
.nav>li .sub li:nth-child(4){
transition-delay: 0.2s;
}
.nav>li .sub li:nth-child(5){
transition-delay: 0s;
}
</style>
</head>
<body>
<ul class="nav">
<li>一级菜单
<ul class="sub">
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
</ul>
</li>
<li>一级菜单
<ul class="sub">
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
</ul>
</li>
<li>一级菜单
<ul class="sub">
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
<li>二级菜单</li>
</ul></li>
</ul>
<div>我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字我是文字</div>
</body>
</html>3、效果图
