纯css实现网站导航条下拉效果

news/2024/5/20 11:10:03/文章来源:https://blog.csdn.net/u011263845/article/details/45028665

不用javascript效果实现导航条的下拉效果。
纯css属性实现，主要应用到绝对定位中的left：auto和
left：-9999px；来隐藏或者鼠标经过的时候显示下拉菜单。

下面是代码：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>css导航下拉效果</title>
<style type="text/css">
body {
font-family: "微软雅黑";
font-size: 1.4em;
margin-top: 4em;
}

ul.nav, ul.nav ul {
margin: 0;
padding: 0;
list-style-type: none;
float: left;
border: 1px solid #486B02;
background-color: #8BD400;
}

ul.nav li {
float: left;
width: 8em;
text-align: center;
}

ul.nav li ul {
position: absolute;
width: 8em;
left: -999em;
margin-left: -1px;
}

.nav li:hover ul {
left: auto;
}

ul.nav a {
display: block;
color: #2B3F00;
text-decoration: none;
padding: 0.3em 1em;
border-right: 1px solid #486B02;
border-left: 1px solid #E4FFD3;*/
}

ul.nav li li a {
border-top: 1px solid #E4FFD3;
border-bottom: 1px solid #486B02;
border-left: 0;
border-right: 0;
text-align: center;
}

ul.nav li:last-child a {
border-right: 0;
border-bottom: 0;
}

ul a:hover,
ul a:focus {
color: #E4FFD3;
background-color: #6DA203;
}
</style>
</head>
<body>
<ul class="nav">
<li><a href="/">小哲</a></li>
<li><a href="/">小哲</a></li>
<li><a href="">小哲</a>
<ul>
<li><a href="">小哲</a></li>
<li><a href="">小哲</a></li>
<li><a href="">小哲</a></li>
</ul>
</li>
</ul>
</body>
</html>