1.dropup,2.dropdown {3position: relative;4} 1.dropdown-menu { 2position: absolute; 3top: 100%; 4left: 0; 5 } 1<divclass="dropdown">2<buttonclass="btn btn-default dropdown-toggle"type="button"id="dropdownMenu1"data-toggle="dropdown"aria-haspopup="true"aria-expanded="true">3Dro...
bootstrap下拉菜单 1.dropdown-menu{2position:absolute;3top:100%;4left:0;5z-index:1000;6display:none;7float:left;8min-width:160px;9padding:5px 0;10margin:2px 0 0;11font-size:14px;12text-align:left;13list-style:none;14background-color:#fff;15-webkit-background-clip:padding-box;16bac...
dropdown、dropdown-menu、dropdown-header、divider、dropdown-submenu 例子见下拉菜单.html //源码 .dropup, .dropdown { position: relative; } .dropdown-toggle:focus { outline: 0; } .dropdown-menu { position: absolute; top: 100%; left: 0; z-index: 1000; dKPqXnhUeydisplay: none; float: ...
因为“dropdown-menu”默认样式设置了“display:none”,其详细源码请查看bootstrap.css文件第3010行～第3029行: .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...
将下拉菜单触发器和下拉菜单都包裹在.dropdown里,或者另一个声明了 position: relative; 的元素。然后加入组成菜单的 HTML 代码。.open,使得下拉列表呈现打开的状态。 <divclass="dropdown"><buttonclass="btn btn-default dropdown-toggle"type="button"id="dropdownMenu1"data-toggle="dropdown"aria-haspopup=...
.top-main .dropdown-menu { width: calc(100% + 60px); position: absolute; left: -30px; } Even though I could get the sub-menu to almost full length, container-fluid and col-x-x both leave 15px padding on both sides, so I had to give -30px position to left and add 60px ...
下拉菜单是可切换的,是以列表格式显示链接的上下文菜单。这可以通过与 下拉菜单(Dropdown) JavaScript 插件 的互动来实现。 将下拉菜单触发器和下拉菜单都包裹在 .dropdown 里,或者另一个声明了 position: relative; 的元素。然后加入组成菜单的 HTML 代码。下面的实例演示了基本的下拉菜单: ...
dropdown-menu { position: absolute; left: 100%; top: 0; } </style> <div class="container"> <!-- Default dropright button --> <div class="btn-group dropright"> <button type="button" class="btn btn-secondary dropdown-toggle" aria-haspopup="true" aria-expanded="false"> Dropright <...
.dropdown-submenu { position: relative;}.dropdown-submenu .dropdown-menu { top: 0; left: 100%; margin-top: -1px;}</style>/* JS: */<script> $(document).ready(function(){ $('.dropdown-submenu a.test').on("click", function(e){ $(this).next('ul').toggle(); e....
制作二级导航,只需要在原有导航的基础上,将li当作父容器并赋值,li class="dropdown”,同时将li中a的属性增添上 class="dropdown-toggle" data-toggle="dropdown" ,这是为Javascript做准备的。并在li中嵌套子列表ul,ul class="dropdown-menu"。 1 <ul class="nav nav-tabs"> ...