我想有我的引导菜单自动下拉悬停，而不是必须点击菜单标题。我还想去掉菜单标题旁边的小箭头。
当前回答
为了加强Sudharshan的回答，我将其包装在一个媒体查询中，以防止在XS显示宽度上出现悬停……
@media (min-width:768px)
{
ul.nav li.dropdown:hover > ul.dropdown-menu {
display: block;
}
.nav .dropdown-menu {
margin-top: 0;
}
}
标记中的插入符号也不是必需的，只是li的下拉类。
其他回答
用这个脚本覆盖bootstrap.js。
jQuery(document).ready(function ($) {
$('.navbar .dropdown').hover(function() {
$(this).addClass('extra-nav-class').find('.dropdown-menu').first().stop(true, true).delay(250).slideDown();
}, function() {
var na = $(this)
na.find('.dropdown-menu').first().stop(true, true).delay(100).slideUp('fast', function(){ na.removeClass('extra-nav-class') })
});
$('.dropdown-submenu').hover(function() {
$(this).addClass('extra-nav-class').find('.dropdown-menu').first().stop(true, true).delay(250).slideDown();
}, function() {
var na = $(this)
na.find('.dropdown-menu').first().stop(true, true).delay(100).slideUp('fast', function(){ na.removeClass('extra-nav-class') })
});
});
为了加强Sudharshan的回答，我将其包装在一个媒体查询中，以防止在XS显示宽度上出现悬停……
@media (min-width:768px)
{
ul.nav li.dropdown:hover > ul.dropdown-menu {
display: block;
}
.nav .dropdown-menu {
margin-top: 0;
}
}
标记中的插入符号也不是必需的，只是li的下拉类。
<ul class="nav navbar-nav">
<li class="active"><a href="#">Link</a></li>
<li><a href="#">Link</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
<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 class="divider"></li>
<li><a href="#">Separated link</a></li>
<li class="divider"></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<script>
$('ul.nav li.dropdown').hover(function() {
$(this).find('.dropdown-menu').stop(true,
true).delay(200).fadeIn(500);
}, function() {
$(this).find('.dropdown-menu').stop(true,
true).delay(200).fadeOut(500);
});
</script>
我基于最新的(v2.0.2) Bootstrap框架创建了一个纯悬停下拉菜单，它支持多个子菜单，我认为我应该发布给未来的用户:
body { padding-top: 60px; padding-bottom: 40px; } .sidebar-nav { padding: 9px 0; } .dropdown-menu .sub-menu { left: 100%; position: absolute; top: 0; visibility: hidden; margin-top: -1px; } .dropdown-menu li:hover .sub-menu { visibility: visible; } .dropdown:hover .dropdown-menu { display: block; } .nav-tabs .dropdown-menu, .nav-pills .dropdown-menu, .navbar .dropdown-menu { margin-top: 0; } .navbar .sub-menu:before { border-bottom: 7px solid transparent; border-left: none; border-right: 7px solid rgba(0, 0, 0, 0.2); border-top: 7px solid transparent; left: -7px; top: 10px; } .navbar .sub-menu:after { border-top: 6px solid transparent; border-left: none; border-right: 6px solid #fff; border-bottom: 6px solid transparent; left: 10px; top: 11px; left: -6px; } <link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.3.2/css/bootstrap.min.css" rel="stylesheet" /> <div class="navbar navbar-fixed-top"> <div class="navbar-inner"> <div class="container-fluid"> <a data-target=".nav-collapse" data-toggle="collapse" class="btn btn-navbar"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </a> <a href="#" class="brand">Project name</a> <div class="nav-collapse"> <ul class="nav"> <li class="active"><a href="#">Home</a></li> <li><a href="#">Link</a></li> <li><a href="#">Link</a></li> <li><a href="#">Link</a></li> <li class="dropdown"> <a data-toggle="dropdown" class="dropdown-toggle" href="#">Dropdown <b class="caret"></b></a> <ul class="dropdown-menu"> <li> <a href="#">2-level Dropdown <i class="icon-arrow-right"></i></a> <ul class="dropdown-menu sub-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li class="divider"></li> <li class="nav-header">Nav header</li> <li><a href="#">Separated link</a></li> <li><a href="#">One more separated link</a></li> </ul> </li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li class="divider"></li> <li class="nav-header">Nav header</li> <li><a href="#">Separated link</a></li> <li><a href="#">One more separated link</a></li> </ul> </li> </ul> <form action="" class="navbar-search pull-left"> <input type="text" placeholder="Search" class="search-query span2"> </form> <ul class="nav pull-right"> <li><a href="#">Link</a></li> <li class="divider-vertical"></li> <li class="dropdown"> <a class="#" href="#">Menu</a> </li> </ul> </div> <!-- /.nav-collapse --> </div> </div> </div> <hr> <ul class="nav nav-pills"> <li class="active"><a href="#">Regular link</a></li> <li class="dropdown"> <a href="#" data-toggle="dropdown" class="dropdown-toggle">Dropdown <b class="caret"></b></a> <ul class="dropdown-menu" id="menu1"> <li> <a href="#">2-level Menu <i class="icon-arrow-right"></i></a> <ul class="dropdown-menu sub-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li class="divider"></li> <li class="nav-header">Nav header</li> <li><a href="#">Separated link</a></li> <li><a href="#">One more separated link</a></li> </ul> </li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li class="divider"></li> <li><a href="#">Separated link</a></li> </ul> </li> <li class="dropdown"> <a href="#">Menu</a> </li> <li class="dropdown"> <a href="#">Menu</a> </li> </ul>
Demo
最标准的回答:
支持aria-expanded属性 支持非触摸设备 支持触摸设备 支持所有下拉菜单
var isTouchDevice = (('ontouchstart' in window) ||
(navigator.MaxTouchPoints > 0) ||
(navigator.msMaxTouchPoints > 0));
if(!isTouchDevice){
// open dropdowns on hover on non mobile devices
$(".dropdown").hover(function(e) {
$('.dropdown-toggle', this).dropdown("toggle");
e.stopPropagation();
});
// prevent blinkling
$(".submenu-link").click(function(e) {
e.stopPropagation();
});
}
如果你需要，你可以将$(".dropdown")更改为特定的区域:
$("#top-menu .dropdown")
