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bootstrap-下拉选项-下拉分隔线

1.运行效果如图所示

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2.实现代码如下

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>表单控件——下拉菜单(下拉分隔线)</title>
    <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
    <link rel="stylesheet" 
    href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" 
    integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" 
    crossorigin="anonymous">

    <!-- 可选的 Bootstrap 主题文件(一般不用引入) -->
    <link rel="stylesheet" 
    href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" 
    integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" 
    crossorigin="anonymous">
</head>
<body>
    <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="http://www.mamicode.com/#">下拉菜单项</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="http://www.mamicode.com/#">下拉菜单项</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="http://www.mamicode.com/#">下拉菜单项</a></li>
            <li role="presentation" class="divider"></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="http://www.mamicode.com/#">下拉菜单项</a></li>
          </ul>
    </div>  


    <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
    <!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
    <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js" 
    integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" 
    crossorigin="anonymous"></script>
</body>
</html>


bootstrap-下拉选项-下拉分隔线