是否有一种方法可以通过JS查找,如果切换按钮菜单折叠或隐藏。
在我知道显示或隐藏" .Collape"时称为事件:
$('.navbar-collapse').on('shown.bs.collapse', function () {
//called when dropdown menu is shown
});
此外,我知道显示或隐藏这样的崩溃的方法:
$('.navbar-collapse').collapse('hide');
但是我无法找到有关如何获得.collapse的当前状态的任何信息,告诉我是否隐藏或显示。
(我正在以更好的方式编辑此答案。)
是的,您可以使用jquery $(element).is(":可见")
检查该元素是否可见这是JSfiddle上的实时演示
这是一些HTML
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">WebSiteName</a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="#">Page 1 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Page 1-1</a></li>
<li><a href="#">Page 1-2</a></li>
<li><a href="#">Page 1-3</a></li>
</ul>
</li>
<li><a href="#">Page 2</a></li>
<li><a href="#">Page 3</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><a href="#"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li>
<li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
</ul>
</div>
</div>
</nav>
<div class="container">
<h3>Collapsible Navbar</h3>
<p>In this example, the navigation bar is hidden on small screens and replaced by a button in the top right corner (try to re-size this window).
<p>Only when the button is clicked, the navigation bar will be displayed.</p>
</div>
<input type="button" value="click me" onclick="clickedIt()" />
这是一些JavaScript
function clickedIt() {
var canSee = $("#myNavbar").is(":visible");
alert(canSee);
}