bootstrap-dropdown

时间：2022-01-21 18:42:28

功能：实现点击时下拉框显示

插件：dropdown.js

要点：dropdown功能往往用在导航栏、导航条上，用作标题显示。dropdown与<ul><li>标签搭配用。

以data-toggle作被点击者，以ul class="dropdown-menu"作展开显示，对被点击者、展开者作一个整体li class="dropdown"包围

<!DOCTYPE html>

<html lang="">

    <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>Title Page</title>

        <!-- Bootstrap CSS -->

        <!-- jquery 与 boostrap 的先后加载也会影响其下拉菜单的显示，看来要用requireJs 解决依赖关系了 -->

        <script src="../bootstrap-3.3.5-dist/js/bootstrap.min.js"></script>

        <script src="../extlib/jquery-1.11.1.min.js" type="text/javascript" charset="utf-8"></script>

        <!-- Local bootstrap CSS & JS -->

        <script src="../bootstrap-3.3.5-dist/js/collapse.js"></script>

        <script src="../bootstrap-3.3.5-dist/js/scrollspy.js"></script>

        <script src="../bootstrap-3.3.5-dist/js/transition.js"></script>

        <script src="../bootstrap-3.3.5-dist/js/dropdown.js"></script>

        <script src="../bootstrap-3.3.5-dist/js/alert.js"></script>

        <link rel="stylesheet" media="screen" href="../bootstrap-3.3.5-dist/css/bootstrap.min.css">

        <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->

        <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->

        <!--[if lt IE 9]>

            <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>

            <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>

        <![endif]-->

    </head>

    <body>

        <h1 class="text-center">Hello World</h1>

    <!-- 显示下拉框，一般与nav navbar-nav ul li结合，关键词：dropdown dropdown-toggle data-toggle="dropdown" drop-menu  -->

    <!-- boostrap 限制了灵活性 -->

        <nav class="navbar navbar-default navbar-fixed-top" role="navigation">

            <a class="navbar-brand" href="#">Title</a>

            <ul class="nav navbar-nav">

                <li class="active">

                    <a href="#">Home</a>

                </li>

                <li>

                    <a href="#">Link</a>

                </li>

            </ul>

             <div class="collapse navbar-collapse js-navbar-scrollspy">

               <ul class="nav navbar-nav">

                       <li><a href="">kkk</a></li>

                       <li class="dropdown">

                       <a href="#" class="dropdown-toggle" data-toggle="dropdown">dropdown</a>

                        <ul class="dropdown-menu">

                            <li><a href="" tabindex="-1">aaaaaaa</a></li>

                            <li><a href="" tabindex="-1">bbbbbbbbbbb</a></li>

                        </ul>

                       </li>

                   </ul>

            </div>

        </nav>

    </body>

</html>

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