我正在尝试使用bootstrap 3 dropdown本地事件将下拉菜单中的动画css类之一添加到我的下拉菜单中，但是它不起作用。您能帮我解决这个问题吗？
非常感谢你。
这是标记
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="css/bootstrap.css" rel="stylesheet">
<link href="css/style.css" rel="stylesheet">
<link href="css/animate.css" rel="stylesheet">
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Brand</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li>
<li><a href="#">Link</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu" role="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>
<form class="navbar-form navbar-left" role="search">
<div class="form-group">
<input type="text" class="form-control" placeholder="Search">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
<ul class="nav navbar-nav navbar-right">
<li><a href="#">Link</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu" role="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>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
<script src="js/jquery.min.js"></script>
<script src="js/bootstrap.js"></script>
$('.dropdown').on('show.bs.dropdown', function () {
$(this).children('.dropdown-menu').addClass('fadeInLeft');
})
</body>
</html>
最佳答案
将您的脚本包装在script元素内，并使用jQuery的本机fadeIn更新为：
<script>
$('.dropdown').on('show.bs.dropdown', function () {
$(this).children('.dropdown-menu').fadeIn(500);
});
$('.dropdown').on('hide.bs.dropdown', function () {
$(this).children('.dropdown-menu').fadeOut(500);
});
</script>
http://jsfiddle.net/ebovbyv5/1/
关于javascript - 如何在引导下拉菜单中添加动画CSS？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28262013/