悬停多级下拉菜单

Question

我正在尝试创建一个带有子菜单的下拉菜单，当我将鼠标悬停在上面时，它将打开，但子菜单总是出现在其父级底部而不是右侧。

 <li class="dropdown">
   <a href="#" class="navbar-brand" data-toggle="dropdown">News <strong class="caret"></strong></a>
     <ul class="dropdown-menu">
       <li>
         <a href="#">A & E Passer </a>
           <ul>
             <li><a href="#">Elementary</a></li>
             <li><a href="#">Secondary</a></li>
            </ul>
        </li>

- Jay Garrick

---

请提供 CSS 代码。此外，您提供的代码缺少一个闭合的 </li> 和 </ul> 标签。 - Joseph Marikle

看起来你正在使用Bootstrap。 - Chiller

a:hover {color: black;}.navbar-nav > li > .dropdown-menu { background-color:lightgray;}.navbar-nav > li > .dropdown-menu a{color:black;}你有什么需要添加的想法吗？谢谢。 - Jay Garrick

Answer 1

Bootstrap默认情况下垂直堆叠子菜单项。我认为您需要的是子菜单和下拉菜单组合自定义CSS类的组合。

.dropdown-submenu {
  position: relative;
}

.dropdown-submenu>.dropdown-menu {
  top: 0;
  left: 100%;
  margin-top: -6px;
  margin-left: -1px;
  -webkit-border-radius: 0 6px 6px 6px;
  -moz-border-radius: 0 6px 6px 6px;
  border-radius: 0 6px 6px 6px;
}

.dropdown-submenu:hover>.dropdown-menu {
  display: block;
}

.dropdown-submenu>a:after {
  display: block;
  content: " ";
  float: right;
  width: 0;
  height: 0;
  border-color: transparent;
  border-style: solid;
  border-width: 5px 0 5px 5px;
  border-left-color: #cccccc;
  margin-top: 5px;
  margin-right: -10px;
}

.dropdown-submenu:hover>a:after {
  border-left-color: #ffffff;
}

.dropdown-submenu.pull-left {
  float: none;
}

.dropdown-submenu.pull-left>.dropdown-menu {
  left: -100%;
  margin-left: 10px;
  -webkit-border-radius: 6px 0 6px 6px;
  -moz-border-radius: 6px 0 6px 6px;
  border-radius: 6px 0 6px 6px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>


<ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu" style="display: block; position: static; margin-bottom: 5px; *width: 180px;">
  <li class="dropdown-submenu ">
    <a tabindex="-1" class="dropdown-toggle topLevel" data-toggle="dropdown" href="#">
        News
        <i class="icon icon-caret-right"></i>
      </a>
    <ul class="dropdown-menu">
      <li class="dropdown-submenu">
        <a href="#">A & E Passer</a>
        <ul class="dropdown-menu">
          <li><a href="#">Elementary</a></li>
          <li><a href="#">Secondary</a></li>
        </ul>
      </li>
    </ul>
  </li>
</ul>

- jones