Bootstrap下拉菜单未选择

Question

I have this code, but selection doesn't work.

<div class="input-group-btn">
    <button id="entity" type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
        Students
        <span class="caret"></span>
    </button>
    <ul class="dropdown-menu">
        <li><a href="#">Teachers</a></li>
        <li><a href="#">Classes</a></li>
    </ul>
</div>
<input type="text" id="s" class="form-control" aria-label="..." oninput="f()">

Answer 1

检查这个最简单的Dropdown菜单Dropdown Bootstrap我不确定您到底想得到什么。