twitter-bootstrap 如何在悬停和单击时制作引导程序 3 下拉菜单？（在导航中使用，而不是导航栏）
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/41732529/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
how to make bootstrap 3 dropdown on hover and click? (using in nav, not navbar)
提问by huageorg
I'm using bootstrap 3 for desktop, and only using nav, rather than navbar.
How to make a dropdown on hover and click?
我在桌面上使用 bootstrap 3，并且只使用导航，而不是导航栏。
如何在悬停和单击时制作下拉菜单？
<ul id="nav" class="nav nav-pills clearfix right" role="tablist">
<li><a href="#">menuA</a></li>
<li><a href="#">menuB</a></li>
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">menuC</a>
<ul id="products-menu" class="dropdown-menu clearfix" role="menu">
<li><a href="">A</a></li>
<li><a href="">B</a></li>
<li><a href="">C</a></li>
<li><a href="">D</a></li>
</ul>
</li>
<li><a href="#">menuD</a></li>
<li><a href="#">menuE</a></li>
</ul>回答by Michael Coker
With this simple CSS.
使用这个简单的 CSS。
.dropdown:hover .dropdown-menu {
display: block;
}<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<ul id="nav" class="nav nav-pills clearfix right" role="tablist">
<li><a href="#">menuA</a></li>
<li><a href="#">menuB</a></li>
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">menuC</a>
<ul id="products-menu" class="dropdown-menu clearfix" role="menu">
<li><a href="">A</a></li>
<li><a href="">B</a></li>
<li><a href="">C</a></li>
<li><a href="">D</a></li>
</ul>
</li>
<li><a href="#">menuD</a></li>
<li><a href="#">menuE</a></li>
</ul>回答by ab29007
Use this script, since you are using jqueryfor bootstrapanyway. Also give additional classes(preferably ids) to jquery selector so it doesn't affect other dropdowns in your page .
使用这个剧本，因为你正在使用jquery的bootstrap反正。还为 jquery 选择器提供额外的classes（最好ids），这样它就不会影响页面中的其他下拉菜单。
$(function(){
$("#nav .dropdown").hover(
function() {
$('#products-menu.dropdown-menu', this).stop( true, true ).fadeIn("fast");
$(this).toggleClass('open');
},
function() {
$('#products-menu.dropdown-menu', this).stop( true, true ).fadeOut("fast");
$(this).toggleClass('open');
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<ul id="nav" class="nav nav-pills clearfix right" role="tablist">
<li><a href="#">menuA</a></li>
<li><a href="#">menuB</a></li>
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">menuC</a>
<ul id="products-menu" class="dropdown-menu clearfix" role="menu">
<li><a href="">A</a></li>
<li><a href="">B</a></li>
<li><a href="">C</a></li>
<li><a href="">D</a></li>
</ul>
</li>
<li><a href="#">menuD</a></li>
<li><a href="#">menuE</a></li>
</ul>回答by GiorgosK
Above solutions are not mobile friendly so here is the solution I am proposing
以上解决方案不适合移动设备，因此这是我提出的解决方案
Detect if its not touch device and that the navbar-toggle(hamburger menu) is not visible and make the menu item hoverable
检测它是否不是触摸设备并且navbar-toggle（汉堡菜单）不可见并使菜单项可悬停
Also made tne margin-top 0 because the gap between the navbar and the menu in some browser will not let you hover to the subitems
也做了 tne margin-top 0 因为导航栏和某些浏览器中的菜单之间的间隙不会让你悬停到子项
As a bonusyou can make the menu parent link clickable by uncommenting the commented line
作为奖励，您可以通过取消注释注释行来使菜单父链接可点击
$(function(){
function is_touch_device() {
return 'ontouchstart' in window // works on most browsers
|| navigator.maxTouchPoints; // works on IE10/11 and Surface
};
if(!is_touch_device() && $('.navbar-toggle:hidden')){
$('.dropdown-menu', this).css('margin-top',0);
$('.dropdown').hover(function(){
$('.dropdown-toggle', this).trigger('click');
//uncomment below to make the parent item clickable
//$('.dropdown-toggle', this).toggleClass("disabled");
});
}
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<ul id="nav" class="nav nav-pills clearfix right" role="tablist">
<li><a href="#">menuA</a></li>
<li><a href="#">menuB</a></li>
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">menuC</a>
<ul id="products-menu" class="dropdown-menu clearfix" role="menu">
<li><a href="">A</a></li>
<li><a href="">B</a></li>
<li><a href="">C</a></li>
<li><a href="">D</a></li>
</ul>
</li>
<li><a href="#">menuD</a></li>
<li><a href="#">menuE</a></li>
</ul>$(function(){
$("#nav .dropdown").hover(
function() {
$('#products-menu.dropdown-menu', this).stop( true, true ).fadeIn("fast");
$(this).toggleClass('open');
},
function() {
$('#products-menu.dropdown-menu', this).stop( true, true ).fadeOut("fast");
$(this).toggleClass('open');
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<ul id="nav" class="nav nav-pills clearfix right" role="tablist">
<li><a href="#">menuA</a></li>
<li><a href="#">menuB</a></li>
<li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown">menuC</a>
<ul id="products-menu" class="dropdown-menu clearfix" role="menu">
<li><a href="">A</a></li>
<li><a href="">B</a></li>
<li><a href="">C</a></li>
<li><a href="">D</a></li>
</ul>
</li>
<li><a href="#">menuD</a></li>
<li><a href="#">menuE</a></li>
</ul>