-
所有元素必须放在同一个.dropdown内！
-
改下拉菜单宽度的话要改dropdown-menu的style
<ul class="dropdown-menu" style="min-width:150%;">
插入符：
<p>插入符实例
<span class="caret"></span>
</p>
- <div class="dropdown"></div> 包围了下拉菜单
- <span class="caret"></span> 插入符
- <button ... data-toggle="dropdown"> 声明dropdown事件实 现点击向下拓展
- <ul class="dropdown-menu"></ul>下拉菜单中被隐藏的内容
- <li></li> 内部元素
- <li role="presentation" class="divider"></li> 中间线
<div class="dropdown">
<button type="button" class="btn dropdown-toggle" id="dropdownMenu1" data-toggle="dropdown">主题
<span class="caret"></span>
</button>
<ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
<li role="presentation" class="dropdown-header">下拉菜单标题</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Java</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">数据挖掘</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">数据通信/网络</a>
</li>
<li role="presentation" class="divider"></li>
<li role="presentation" class="dropdown-header">下拉菜单标题</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">分离的链接</a>
</li>
</ul>
</div>
image.png
导航页的下拉菜单：
<p>带有下拉菜单的标签页</p>
<ul class="nav nav-tabs">
<li class="active">
<a href="#">Home</a></li>
<li>
<a href="#">SVN</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="#">Java
<span class="caret"></span></a>
<ul class="dropdown-menu">
<li>
<a href="#">Swing</a></li>
<li>
<a href="#">jMeter</a></li>
<li>
<a href="#">EJB</a></li>
<li class="divider"></li>
<li>
<a href="#">分离的链接</a></li>
</ul>
</li>
<li>
<a href="#">PHP</a></li>
</ul>
image.png
怎么实现鼠标悬浮弹出？
.nav> li:hover .dropdown-menu {display: block;}
