Javascript 避免在点击内部时关闭下拉菜单

我有一个推特 bootstrap 下拉菜单.正如所有推特 bootstrap 用户所知，点击后下拉菜单关闭(甚至在其内部点击).

为了避免这种情况，我可以轻松地在下拉菜单上附加一个click事件处理程序，只需添加著名的event.stopPropagation().

<ul class="nav navbar-nav">
  <li class="dropdown mega-dropdown">
    <a href="javascript:;" class="dropdown-toggle" data-toggle="dropdown">
      <i class="fa fa-list-alt"></i> Menu item 1
      <span class="fa fa-chevron-down pull-right"></span>
    </a>
    <ul class="dropdown-menu mega-dropdown-menu">
      <li>
        <div id="carousel" class="carousel slide" data-ride="carousel">
          <ol class="carousel-indicators">
            <li data-slide-to="0" data-target="#carousel"></li>
            <li class="active" data-slide-to="1" data-target="#carousel"></li>
          </ol>
          <div class="carousel-inner">
            <div class="item">
              <img alt="" class="img-rounded" src="img1.jpg">
            </div>
            <div class="item active">
              <img alt="" class="img-rounded" src="img2.jpg">
            </div>
          </div>
          <a data-slide="prev" role="button" href="#carousel" 
             class="left carousel-control">
            <span class="glyphicon glyphicon-chevron-left"></span>
          </a>
          <a data-slide="next" role="button" href="#carousel" 
             class="right carousel-control">
            <span class="glyphicon glyphicon-chevron-right"></span>
          </a>
        </div>
      </li>
    </ul>
  </li>
</ul>

然而，这看起来很简单，而且是非常常见的行为，而且由于carousel-controls个(以及carousel indicators个)事件处理程序被委托给document对象，因此这些元素上的click事件(prev/next个控件，.)将被"忽略".

$('ul.dropdown-menu.mega-dropdown-menu').on('click', function(event){
    // The event won't be propagated up to the document NODE and 
    // therefore delegated events won't be fired
    event.stopPropagation();
});

基于以下原因，依赖Twitter bootstrap 下拉hide/hidden事件不是解决方案:

• 为这两个事件处理程序提供的事件对象不引用已单击的元素
• 我无法控制下拉菜单内容，因此无法添加flag类或属性

This fiddle为正常行为，this fiddle为添加event.stopPropagation().

使现代化

感谢罗曼的answer that you can find below/3165879">his answer美元.我还找到了answer that you can find below.