<div class="dropdown"> <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown"> 下拉菜单 <span class="caret"></span> </button> <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation"><a role="menuitem" tabindex="-1" href="#">下拉菜单项</a></li> <li role="presentation"><a role="menuitem" tabindex="-1" href="#">下拉菜单项</a></li> <li role="presentation"><a role="menuitem" tabindex="-1" href="#">下拉菜单项</a></li> <li role="presentation"><a role="menuitem" tabindex="-1" href="#">下拉菜单项</a></li> </ul> </div> <!--jquery一定要在bootstrap之前导入,后者是在前者的基础上面实现的--> <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
.dropdown-menu {
position: absolute;/*设置绝对定位,相对于父元素div.dropdown*/
top: 100%;/*让下拉菜单项在父菜单项底部,如果父元素不设置相对定位,该元素相对于body元素*/
left: 0;
z-index: 1000;/*让下拉菜单项不被其他元素遮盖住*/
display: none;/*默认隐藏下拉菜单项*/
float: left;
min-width: 160px;
padding: 5px 0;
margin: 2px 0 0;
font-size: 14px;
list-style: none;
background-color: #fff;
background-clip: padding-box;
border: 1px solid #ccc;
border: 1px solid rgba(0, 0, 0, .15);
border-radius: 4px;
-webkit-box-shadow: 0 6px 12px rgba(0, 0, 0, .175);
box-shadow: 0 6px 12px rgba(0, 0, 0, .175);
}
.open > .dropdown-menu {
display: block;
}
<div class="dropdown"> <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown"> 下拉菜单 <span class="caret"></span> </button> <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation" class="divider"></li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> </ul> </div>
<li role="presentation" class="divider"></li>
<div class="dropdown"> <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown"> 下拉菜单 <span class="caret"></span> </button> <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation" class="dropdown-header">第一部分菜单头部</li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation" class="divider"></li> <li role="presentation" class="dropdown-header">第二部分菜单头部</li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> </ul> </div>
<li role="presentation" class="dropdown-header">第二部分菜单头部</li>
<h4>使用pull-right类使下拉菜单与父容器右边对齐</h4> <div class="dropdown" style="float: left;"> <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown">
<span class="caret"></span> </button> <ul class="dropdown-menu pull-right" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation" class="divider"></li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> </ul> </div> <br /> <br /> <h4>使用dropdown-menu-right类使下拉菜单与父容器右边对齐</h4> <div class="dropdown" style="float: left;"> <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown">
<span class="caret"></span> </button> <ul class="dropdown-menu dropdown-menu-right" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation" class="divider"></li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> </ul> </div> <br /> <br /> <h4>下拉菜单与父容器左边对齐</h4> <div class="dropdown" style="float: left;"> <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown">
<span class="caret"></span> </button> <ul class="dropdown-menu dropdown-menu-left" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> <li role="presentation" class="divider"></li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">下拉菜单项</a> </li> </ul> </div>
.dropdown-menu.pull-right {
right: 0;
left: auto;
}
.dropdown-menu-right {
right: 0;
left: auto;
}
<div class="dropdown"> <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown"> 下拉菜单 <span class="caret"></span> </button> <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation" class="active"><a role="menuitem" tabindex="-1" href="#">下拉菜单项</a></li> <li role="presentation" class="disabled"><a role="menuitem" tabindex="-1" href="#">下拉菜单项</a></li> <li role="presentation"><a role="menuitem" tabindex="-1" href="#">下拉菜单项</a></li> <li role="presentation" class="divider"></li> <li role="presentation" class="disabled"><a role="menuitem" tabindex="-1" href="#">下拉菜单项</a></li> </ul> </div>
<div class="btn-group"> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-step-backward"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-fast-backward"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-backward"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-play"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-pause"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-stop"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-forward "></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-fast-forward"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-step-forward"></span></button> </div>
<div class="btn-toolbar"> <div class="btn-group"> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-align-left"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-align-center"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-align-right"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-align-justify"></span></button> </div> <div class="btn-group"> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-indent-left"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-indent-right"></span></button> </div> <div class="btn-group"> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-font"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-bold"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-italic"></span></button> </div> <div class="btn-group"> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-text-height"></span></button> <button type="button" class="btn btn-default"><span class="glyphicon glyphicon-text-width"></span></button> </div> </div>
<div class="btn-group"> <button type="button" class="btn btn-default">首页</button> <button type="button" class="btn btn-default">产品展示</button> <button type="button" class="btn btn-default">案例分析</button> <button type="button" class="btn btn-default">联系我们</button> <div class="btn-group"> <button class="btn btn-default dropdown-toggle" data-toggle="dropdown" type="button">关于我们<span class="caret"></span></button> <ul class="dropdown-menu dropdown-menu-left"> <li><a href="##">公司简介</a></li> <li><a href="##">企业文化</a></li> <li><a href="##">组织结构</a></li> <li><a href="##">客服服务</a></li> </ul> </div> </div>
<div class="btn-group-vertical"> <button class="btn btn-default" type="button">首页</button> <button class="btn btn-default" type="button">产品展示</button> <button class="btn btn-default" type="button">案例分析</button> <button class="btn btn-default" type="button">联系我们</button> <div class="btn-group"> <button class="btn btn-default dropdown-toggle" data-toggle="dropdown" type="button">关于我们<span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="##">公司简介</a></li> <li><a href="##">企业文化</a></li> <li><a href="##">组织结构</a></li> <li><a href="##">客服服务</a></li> </ul> </div> </div>
<div class="btn-wrap"> <div class="btn-group btn-group-justified"> <a class="btn btn-default" href="#">首页</a> <a class="btn btn-default" href="#">产品展示</a> <a class="btn btn-default" href="#">案例分析</a> <a class="btn btn-default" href="#">联系我们</a> </div> </div>
<div class="btn-group dropup"> <button class="btn btn-default dropdown-toggle" data-toggle="dropdown" type="button">按钮下拉菜单<span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="##">按钮下拉菜单项</a></li> <li><a href="##">按钮下拉菜单项</a></li> <li><a href="##">按钮下拉菜单项</a></li> <li><a href="##">按钮下拉菜单项</a></li> </ul> </div>
<ul class="nav nav-tabs"> <li><a href="##">Home</a></li> <li><a href="##">CSS3</a></li> <li><a href="##">Sass</a></li> <li><a href="##">jQuery</a></li> <li><a href="##">Responsive</a></li> </ul>
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