如何将动画 css 添加到引导下拉列表

How to add animate css to bootstrap dropdown?

本文关键字：下拉列表 添加 css 动画      更新时间：2023-09-26

我正在尝试将带有引导 3 下拉本机事件的动画 css 类之一添加到我的下拉列表中，但它不起作用。你能帮我解决这个问题吗？

谢谢。

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>
将

脚本包装在脚本元素中，并使用 jQuery 的本机fadeIn更新到此元素：

<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/

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