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Bootstrap下拉菜单样式

本文实例为大家分享了Bootstrap下拉菜单的具体代码，供大家参考，具体内容如下

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Bootstrap</title>
  <link rel="stylesheet" href="css/bootstrap.css" />
</head>
<!--第1步:添加一个dropdown父级;
第2步:给button添加一个data-toggle="dropdown"属性;
第3步:给ul添加一个class="dropdown-menu”.
 最好再给button添加一个dropdown-toggle的class属性
-->
<body>
  <div class="container" style="margin-top:5px">
    <div class="row">
      <div class="dropdown">
        <button class="btn btn-default dropdown-toggle" data-toggle="dropdown">学院课程 <span class="caret"></span></button><!--btn-default默认颜色-->
        <ul class="dropdown-menu">
          <li><a href="#">html</a></li>
          <li><a href="#">css</a></li>
          <li><a href="#">javascript</a></li>
          <li><a href="#">less</a></li>
          <li><a href="#">bootstrap</a></li>
        </ul>  
      </div>

    </div>
  </div>
  <script src="js/jquery-2.1.0.js"></script>
  <script src="js/bootstrap.js"></script>
</body>
</html>

效果图：

Bootstrap下拉菜单的样式：

<!doctype html>
<html>
<head>
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>Bootstrap</title>
 <link rel="stylesheet" href="css/bootstrap.css" rel="external nofollow" />
</head>
<body>
 <div class="container" style="margin-top:5px">
 <div class="row">
  <div class="col-lg-4">
  <div class="dropdown"> <!--在dropdown后面加上open使下拉列表默认展开;而pull-right使其右浮动并右对齐，改为dropup使箭头朝上并向上展开-->
   <button class="btn btn-default dropdown-toggle btn-block" data-toggle="dropdown">学院课程 <span class="caret"></span></button><!--btn-block使按钮撑满整个父级-->
   <ul class="dropdown-menu">
   <li><a href="#" 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" >html</a></li>
   <li><a href="#" 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" >css</a></li>
   <li><a href="#" 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" >javascript</a></li>
   <li><a href="#" 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" >less</a></li>
   <li><a href="#" 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" >bootstrap</a></li>
   </ul> 
  </div>
  </div>
  <div class="col-lg-4">
  <div class="dropdown">
   <button class="btn btn-default dropdown-toggle" data-toggle="dropdown">学院课程 <span class="caret"></span></button>
   <ul class="dropdown-menu">
   <li class="dropdown-header"><a href="#" 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" >前端</a></li><!--dropdown-header是菜单里的标题，给li添加-->
   <li><a href="#" 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" >html</a></li>
   <li><a href="#" 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" >css</a></li>
   <li><a href="#" 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" >javascript</a></li>
   <li><a href="#" 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" >less</a></li>
   <li><a href="#" 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" >bootstrap</a></li>
   <li class="divider"><a href="#" 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" >html</a></li><!--divider是分隔线，给li添加-->
   <li class="dropdown-header text-center"><a href="#" 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" >后端</a></li><!--text-center让内容居中-->
   <li><a href="#" 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" >php</a></li>
   <li><a href="#" 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" >java</a></li>
   <li class="disabled"><a href="#" 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" >.net</a></li><!--disabled使菜单不可选-->
   </ul> 
  </div>
  </div>
 </div>
 </div>
 <script src="js/jquery-2.1.0.js"></script>
 <script src="js/bootstrap.js"></script>
</body>
</html>

效果图：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。


# Bootstrap  # 下拉菜单  # Bootstrap每天必学之下拉菜单  # Bootstrap每天必学之级联下拉菜单  # Bootstrap 中下拉菜单修改成鼠标悬停直接显示  # Bootstrap实现下拉菜单效果  # Bootstrap中的Dropdown下拉菜单更改为悬停(hover)触发  # Bootstrap导航条可点击和鼠标悬停显示下拉菜单的实现代码  # 学习Bootstrap组件之下拉菜单  # JS组件Bootstrap实现下拉菜单效果代码  # BootStrap点击下拉菜单项后显示一个新的输入框实现代码  # Bootstrap按钮下拉菜单组件详解  # 使其  # 可选  # 大家分享  # 具体内容  # 大家多多  # 再给  # 朝上  # 后端  # 分隔线  # 右对齐  # initial  # link  # scale  # title  # device  # edge  # content  # width  # viewport  # 父级 


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