<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>折叠菜单</title>
<style>
*{
margin: 0;
padding: 0;
}
.nav{
list-style: none;
width: 300px;
margin: 100px auto;
/*border: 1px solid #000;*/
}
.nav>li{
border: 1px solid #000;
line-height: 35px;
border-bottom: none;
text-indent: 2em;
position: relative;
}
.nav>li:last-child{
border-bottom: 1px solid #000;
border-bottom-right-radius: 10px;
border-bottom-left-radius: 10px;
}
.nav>li:first-child{
border-top-right-radius: 10px;
border-top-left-radius: 10px;
}
.nav>li>span{
background: url("images/arrow_right.png") no-repeat center center;
display: inline-block;
width: 32px;
height: 32px;
position: absolute;
right: 10px;
top: 5px;
}
.sub{
display: none;
}
.sub>li{
list-style: none;
background: mediumpurple;
border-bottom: 1px solid white;
}
.sub>li:hover{
background: red;
}
.nav>.current>span{
transform: rotate(90deg);
}
</style>
<script src="js/jquery-1.12.4.js"></script>
<script>
$(function () {
// 1.监听一级菜单的点击事件
$(".nav>li").click(function () {
// 1.1拿到二级菜单
var $sub = $(this).children(".sub");
// 1.2让二级菜单展开
$sub.slideDown(1000);
// 1.3拿到所有非当前的二级菜单
var otherSub = $(this).siblings().children(".sub");
// 1.4让所有非当前的二级菜单收起
otherSub.slideUp(1000);
// 1.5让被点击的一级菜单箭头旋转
$(this).addClass("current");
// 1.6让所有非被点击的一级菜单箭头还原
$(this).siblings().removeClass("current");
});
});
</script>
</head>
<body>
<ul class="nav">
<li>一级菜单<span></span>
<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<span></span>
<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<span></span>
<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<span></span>
<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<span></span>
<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<span></span>
<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<span></span>
<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<span></span>
<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>
</body>
</html>小白学习之路----折叠菜单
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转载自blog.csdn.net/weixin_42805130/article/details/81333267
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