html - Bootstrap 3.3.4 中的多级下拉列表

Question

所以我正在尝试完成标题所说的多级下拉菜单。我只得到一个级别，第二个级别没有出现。我不确定我错过了什么。这是我所拥有的:

        <div class="collapse navbar-collapse" id="conference-dropdowns">
        <ul class="nav navbar-nav">
            <li class="dropdown">
                <a class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">AFC<span class="caret"></span></a>
                <ul class="dropdown-menu multi-level" role="menu">
                    <li class="dropdown-submenu">
                        <li><a href="/conference/1/division/1">AFC South</a></li>
                        <ul class="dropdown-menu">
                            <li><a href="/conference/1/division/1/team/1">Colts</a></li>
                        </ul>
                    </li>
                </ul>
            </li>
        </ul>
        <form class="navbar-form navbar-left" role="search">
            <div class="form-group">
                <input class="form-control" placeholder="Search" type="text">
            </div>
            <button type="submit" class="btn btn-default">Submit</button>
        </form>
        <ul class="nav navbar-nav navbar-right">
            <li><a href="#">Logout</a></li>
        </ul>
    </div>

我在 bootstrap 3.3.4 上，只是为 Dropdown 获取 AFC，而在里面只有 AFC South 出现。没有子菜单。任何帮助都会很棒。谢谢。我也在用 bootswatch spacelab

Answer 1

希望这就是你要找的^^

<div class="container">
 <div class="dropdown">
  <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">AFC
    <span class="caret"></span></button>
  <ul class="dropdown-menu">
   <li><a tabindex="-1" href="#">AFC South</a></li>
   <li class="dropdown-submenu">
    <a class="test" tabindex="-1" href="#">New dropdown <span class="caret"></span></a>
    <ul class="dropdown-menu">
     <li><a tabindex="-1" href="#">2nd level dropdown</a></li>
     <li><a tabindex="-1" href="#">2nd level dropdown</a></li>
     <!--<li class="dropdown-submenu">
            <a class="test" href="#">Another dropdown <span class="caret"></span></a>
            <ul class="dropdown-menu">
              <li><a href="#">3rd level dropdown</a></li>
              <li><a href="#">3rd level dropdown</a></li>-->
    </ul>
   </li>
  </ul>
 </div>
</div>

$(document).ready(function() {
 $(".dropdown-submenu a.test").on("click", function(e) {
  $(this)
   .next("ul")
   .toggle();
  e.stopPropagation();
  e.preventDefault();
 });
});

JSFiddle