我尝试将 Bootstrap 下拉按钮添加到 <a>，但下拉菜单不起作用。我该怎么做呢？

Question

<li><a href="#" class=" dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-expanded="true">CONTACT<span class="caret"></span></a>    
    </li>
        <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Action</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Another action</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Something else here</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Separated link</a></li>
        </ul>

有人可以帮助我吗？里面的所有内容都来自 bootstrap 的网站。这是整个 html 文件 http://pastebin.com/YXsVPRhz

Answer 1

将 ul 添加为锚点的同级

<li>
    <a href="#" class=" dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-expanded="true">CONTACT<span class="caret"></span></a> 
    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
        <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Action</a>
        </li>
        <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Another action</a>
        </li>
        <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Something else here</a>
        </li>
        <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Separated link</a>
        </li>
    </ul>
</li>

演示：Fiddle

Answer 2

您缺少 a.dropdown-toggle 中的 data-target，以及目标 ul 中的 id。

对于 a，添加一个数据目标属性，它是 ul:
的 ID data-toggle="dropdown" //sample name

对于ul，添加一个id：
id="dropdown" //sample name

所以应该是：

<li><a href="#" class=" dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" data-target="dropdown-menu" aria-expanded="true">CONTACT<span class="caret"></span></a>    
    </li>
        <ul class="dropdown-menu" id="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Action</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Another action</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Something else here</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Separated link</a></li>
        </ul>

我尝试将 Bootstrap 下拉按钮添加到 <a>，但下拉菜单不起作用。我该怎么做呢？

I tried to add a Bootstrap dropdown button to <a> but the dropdown menu wont work. How do I do this?

html

javascript

jquery

twitter-bootstrap

drop-down-menu