css下拉菜单在CSS中定义下拉菜单的代码

编程之家2023-11-03112次浏览

大家好，css下拉菜单相信很多的网友都不是很明白，包括在CSS中定义下拉菜单的代码也是一样，不过没有关系，接下来就来为大家分享关于css下拉菜单和在CSS中定义下拉菜单的代码的一些知识点，大家可以关注收藏，免得下次来找不到哦，下面我们开始吧！

纯CSS如何实现下拉菜单

这次给大家带来纯CSS如何实现下拉菜单，纯CSS实现下拉菜单的注意事项有哪些，下面就是实战案例，一起来看一下。

本篇文章主要介绍了纯CSS实现下拉菜单的示例代码，分享给大家，具体如下：

将下拉菜单的ul高度设置为0，并且超出部分隐藏掉。

设置下拉菜单的高度添加过渡效果，高度为auto时过渡效果失效。

<style>

ul{

list-style: none;

margin: 0;

padding: 0;

}

ul li a{

display: block;

text-decoration: none;

width: 100px;

height: 50px;

text-align: center;

line-height: 50px;

color: white;

background-color:#2f3e45;

}

.drop-down{

width: 100px;

height: 50px;

}

.drop-down-content{

opacity: 0;

height: 0;

overflow: hidden;

transition: all 1s ease;

}

font-size: 20px;

margin: 0;

}

.drop-down-content li:hover a{

background-color: red;

}

.nav.drop-down:hover.drop-down-content{

opacity: 1;

height: 150px;

}

</style>

</ul>

</li>

</ul>

<p>内容</p>效果图如下：

相信看了本文案例你已经掌握了方法，更多精彩请关注Gxl网其它相关文章！

在CSS中定义下拉菜单的代码

参考一下这个

<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<<meta name="description" content="下拉菜单,CSS,布局"/>

margin:0;

padding:0;

border:0;

}

html{

background:#bfc4c7;/*背景颜色*/

}

body{

font:12px/150%'宋体';

margin:0 auto;

width:770px;

text-align:center;

}

#menu,#nav,#footer{

clear:both;

}

#nav{

padding-left:20px;

text-align:left;

background:#a60;

}

#footer{

background:#a30;

}

#logo,#banner,#mail,#left,#middle,#right{

float:left;

width:180px;

background:#f00;

}

#logo,#banner,#mail{

height:60px;

}

#banner{

width:468px;

background:#f60;

}

#mail{

width:122px;

background:#f90;

}

#left,#right{

width:200px;

}

#left{

background:#093;

}

#middle{

width:370px;

background:#063;

}

#right{

background:#033;

}

/*menu部分*/

#menu{

margin:0;

position:relative;

width:770px!important;

}

#menu ul{

list-style:none;

}

#menu li{

float:left;

position:relative;

}

#menu ul ul{

visibility:hidden;

position:absolute;

left:0px;

top:30px;

}

#menu table{

position:absolute;

left:0;

top:0;

}

#menu ul li:hover ul,#menu ul a:hover ul{

visibility:visible;

}

#menu a{

display:block;

text-align:center;

text-decoration:none;

width:77px;

height:30px;

color:#000;

line-height:30px;

background:#c9c9a7;

}

#menu a:hover{

color:#fff;

background:#b3ab79;

}

#menu ul ul li{

clear:both;

text-align:left;

}

#menu ul ul li a{

display:block;

width:77px;

height:30px;

background:#faeec7;

color:#000;

}

#menu ul ul li a:hover{

background:#dfc184;

color:#000;

}

</style>

</head>

<ul>

<li>

<table>

<tr>

<ul>

<li><a rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" href="">XHTML</a></li>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

<li>

<table>

<tr>

<ul>

</ul><!--[if lte IE 6]>

</td>

</tr>

</table>

</a><![endif]-->

</li>

</ul>

</div>

</body>

</html>

如何用css做下拉菜单

纯CSS的下拉菜单，此处理解的意思就是<li>标签套<li>标签，然后再给<li>标签设置样式。在被套的<li>标签设置平时状态为隐藏，再等鼠标移动到上一个<li>标签时，将被套的<li>标签显示（样式：overflow:hidden;）。

贴一段网上摘的纯CSS下拉菜单（二级）

<!DOCTYPE HTML>

<html>

<head>

<title>利用float制作兼容ie6纯css下来菜单</title>

*{ margin:0; padding:0;}

ul{ list-style:none;}

a:hover{color:#555;}

.nav{ float:left; overflow:hidden; text-align:center; font-size:14px;}

.nav dd{ float:left; width:300px; margin:-888px-150px 0 0;}

.nav dd a{ float:left; margin-top:888px; display:block; position:relative; background:#eee; width:150px; height:30px; line-height:30px; border-bottom:1px solid#fff;}

.nav a:hover{ margin-right:1px; background:#3cf;}

.nav dd ul{ float:left; font-size:0; z-index:888;}

.nav dd li a{ clear:left; width:150px; margin-top:0; font-size:14px;}

.nav dd li a:hover{ margin-right:1px;}

</style>

</head>

<body>

<dd>

<ul>

</ul>

</dd>

<dd>

<ul>

</ul>

</dd>

<dd>

<ul>

</ul>

</dd>

</dl>

</body>

</html>

css下拉菜单和在CSS中定义下拉菜单的代码的问题分享结束啦，以上的文章解决了您的问题吗？欢迎您下次再来哦！

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