twitter-bootstrap - Twitter 的带有点击事件的 Bootstrap 下拉菜单

Question

我使用的是 twitter bootstrap“下拉菜单”，而不是带有 html 标记的“下拉菜单”多级菜单。

   <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu">
      <li><a tabindex="-1" href="#">Action</a></li>
      <li><a tabindex="-1" href="#">Another action</a>
          <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu">
              <li><a tabindex="-1" href="#">Action</a></li>
              <li><a tabindex="-1" href="#">Another action</a></li>
              <li><a tabindex="-1" href="#">Something else here</a>
                  <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu">
                     <li><a tabindex="-1" href="#">Action</a></li>
                     <li><a tabindex="-1" href="#">Another action</a></li>

                 </ul>
              </li>
              <li class="divider"></li>
              <li><a tabindex="-1" href="#">Separated link</a></li>
          </ul>
      </li>
      <li><a tabindex="-1" href="#">Something else here</a>
          <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu">
              <li><a tabindex="-1" href="#">Action</a></li>
              <li><a tabindex="-1" href="#">Another action</a></li>
              <li><a tabindex="-1" href="#">Something else here</a></li>
              <li class="divider"></li>
              <li><a tabindex="-1" href="#">Separated link</a></li>
          </ul>
      </li>
      <li class="divider"></li>
      <li><a tabindex="-1" href="#">Separated link</a></li>
  </ul>

我有一个问题。我可以添加点击事件来显示子菜单吗？

Answer 1

子菜单由 css 显示。因此，首先禁用 CSS(悬停)并向菜单项添加单击事件。

html 示例:

<div class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Show menu</a>
<ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu">
  <li><a tabindex="-1" href="#">Action</a></li>
  <li><a tabindex="-1" href="#">Another action</a></li>
   <li class="dropdown-submenu">
    <a tabindex="-1" href="#">More options</a>
    <ul class="dropdown-menu">
        <li><a tabindex="-1" href="#">Action</a></li>
        <li><a tabindex="-1" href="#">Another action</a></li>
    </ul>
  </li>
  <li class="divider"></li>
  <li><a tabindex="-1" href="#">Separated link</a></li>
</ul>
</div>

禁用 CSS:

.dropdown-submenu:hover > .dropdown-menu {
  display: none;
}

通过javascript触发点击:

$('.dropdown-submenu').click(function(){
  $('.dropdown-submenu > .dropdown-menu').css('display','block');
  return false;
});

示例:http://bootply.com/66088

注意，当您有多个子菜单时，请为每个子菜单指定自己的类别