<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ --> <title>Bootstrap 101 Template</title> <!-- Bootstrap样式表 --> <link href="css/bootstrap.min.css" rel="stylesheet"> <!-- HTML5 shim and Respond.js for 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="//cdn.bootcss.com/html5shiv/3.7.2/html5shiv.min.js"></script> <script src="//cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script> <![endif]--> </head> <body> <div class="dropdown"> <button class="btn btn-default dropdown-toggle" type="button" id="Menu" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">Dropdown <span class="caret"></span> </button> <ul class="dropdown-menu" aria-labelledby="Menu"> <!-- 设置下拉菜单的标题 --> <!-- <li class="dropdown-header">Dropdown header</li> --> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <!-- 为下拉菜单添加分割线 --> <li role="separator" class="divider"></li> <!-- 禁用下拉项，添加disabled类 --> <li class="disabled"><a href="#">Disabled link</a></li> <li class="disabled"><a href="#">Something else here</a></li> <li><a href="#">Separated link</a></li> </ul> </div> <script src="../JQ/jquery-1.12.4.min.js"></script> <script src="js/bootstrap.min.js"></script> </body> </html>
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ --> <title>Bootstrap 101 Template</title> <!-- 1.加载Bootstrap层叠样式表 --> <link href="css/bootstrap.min.css" rel="stylesheet"> <!-- HTML5 shim and Respond.js for 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="//cdn.bootcss.com/html5shiv/3.7.2/html5shiv.min.js"></script> <script src="//cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script> <![endif]--> </head> <body> <!-- 分列式下拉菜单 --> <div class="btn-group"> <button type="button" class="btn btn-default btn-lg">Action</button> <button type="button" class="btn btn-success btn-lg dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> <span class="caret"></span> <!-- .sr-only隐藏元素 --> <span class="sr-only">Toggle Dropdown</span> </button> <ul class="dropdown-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li role="separator" class="divider"></li> <li><a href="#">Separated link</a></li> </ul> </div> </body> </html> <!-- 2.加载JQuery库 --> <script src="../plugins/jquery-1.12.4.min.js"></script> <!-- 3.加载Bootstrap核心js --> <script src="js/bootstrap.min.js"></script>
<!-- 添加 .dropup 类就能使触发的下拉菜单朝上方打开。 --> <div class="btn-group dropup"> <button type="button" class="btn btn-default">Dropup</button> <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> <span class="caret"></span> <span class="sr-only">Toggle Dropdown</span> </button> <ul class="dropdown-menu"> <!-- Dropdown menu links --> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li role="separator" class="divider"></li> <li><a href="#">Separated link</a></li> </ul> </div>
分列式上拉菜单：
分列式下拉菜单：
单按钮下拉菜单效果如下：
