Bootstrap/docs/_includes/components/button-dropdowns.html

<div class="bs-docs-section">
  <h1 id="btn-dropdowns" class="page-header">Button dropdowns</h1>

  <p class="lead">Use any button to trigger a dropdown menu by placing it within a <code>.btn-group</code> and providing the proper menu markup.</p>

  <div class="bs-callout bs-callout-danger" id="callout-btndropdown-dependency">
    <h4>Plugin dependency</h4>
    <p>Button dropdowns require the <a href="../javascript/#dropdowns">dropdown plugin</a> to be included in your version of Bootstrap.</p>
  </div>

  <h3 id="btn-dropdowns-single">Single button dropdowns</h3>
  <p>Turn a button into a dropdown toggle with some basic markup changes.</p>
  <div class="bs-example" data-example-id="single-button-dropdown">
    <div class="btn-group">
      <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Default <span class="caret"></span></button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Primary <span class="caret"></span></button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Success <span class="caret"></span></button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Info <span class="caret"></span></button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-warning dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Warning <span class="caret"></span></button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Danger <span class="caret"></span></button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
  </div>
{% highlight html %}
<!-- Single button -->
<div class="btn-group">
  <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
    Action <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" role="menu">
    <li><a href="#">Action</a></li>
    <li><a href="#">Another action</a></li>
    <li><a href="#">Something else here</a></li>
    <li class="divider"></li>
    <li><a href="#">Separated link</a></li>
  </ul>
</div>
{% endhighlight %}

  <h3 id="btn-dropdowns-split">Split button dropdowns</h3>
  <p>Similarly, create split button dropdowns with the same markup changes, only with a separate button.</p>
  <div class="bs-example" data-example-id="split-button-dropdown">
    <div class="btn-group">
      <button type="button" class="btn btn-default">Default</button>
      <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
      </button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-primary">Primary</button>
      <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
      </button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-success">Success</button>
      <button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
      </button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-info">Info</button>
      <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
      </button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-warning">Warning</button>
      <button type="button" class="btn btn-warning dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
      </button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
    <div class="btn-group">
      <button type="button" class="btn btn-danger">Danger</button>
      <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
      </button>
      <ul class="dropdown-menu" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div><!-- /btn-group -->
  </div>
{% highlight html %}
<!-- Split button -->
<div class="btn-group">
  <button type="button" class="btn btn-danger">Action</button>
  <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
    <span class="caret"></span>
    <span class="sr-only">Toggle Dropdown</span>
  </button>
  <ul class="dropdown-menu" role="menu">
    <li><a href="#">Action</a></li>
    <li><a href="#">Another action</a></li>
    <li><a href="#">Something else here</a></li>
    <li class="divider"></li>
    <li><a href="#">Separated link</a></li>
  </ul>
</div>
{% endhighlight %}

  <h3 id="btn-dropdowns-sizing">Sizing</h3>
  <p>Button dropdowns work with buttons of all sizes.</p>
  <div class="bs-example" data-example-id="button-dropdown-sizing">
    <div class="btn-toolbar" role="toolbar">
      <div class="btn-group">
        <button class="btn btn-default btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
          Large button <span class="caret"></span>
        </button>
        <ul class="dropdown-menu" role="menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
    </div><!-- /btn-toolbar -->
    <div class="btn-toolbar" role="toolbar">
      <div class="btn-group">
        <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
          Small button <span class="caret"></span>
        </button>
        <ul class="dropdown-menu" role="menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
    </div><!-- /btn-toolbar -->
    <div class="btn-toolbar" role="toolbar">
      <div class="btn-group">
        <button class="btn btn-default btn-xs dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
          Extra small button <span class="caret"></span>
        </button>
        <ul class="dropdown-menu" role="menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
    </div><!-- /btn-toolbar -->
  </div><!-- /example -->
{% highlight html %}
<!-- Large button group -->
<div class="btn-group">
  <button class="btn btn-default btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
    Large button <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" role="menu">
    ...
  </ul>
</div>

<!-- Small button group -->
<div class="btn-group">
  <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
    Small button <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" role="menu">
    ...
  </ul>
</div>

<!-- Extra small button group -->
<div class="btn-group">
  <button class="btn btn-default btn-xs dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
    Extra small button <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" role="menu">
    ...
  </ul>
</div>
{% endhighlight %}

  <h3 id="btn-dropdowns-dropup">Dropup variation</h3>
  <p>Trigger dropdown menus above elements by adding <code>.dropup</code> to the parent.</p>
  <div class="bs-example" data-example-id="button-dropdown-dropup">
    <div class="btn-toolbar" role="toolbar">
      <div class="btn-group dropup">
        <button type="button" class="btn btn-default">Dropup</button>
        <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
          <span class="caret"></span>
          <span class="sr-only">Toggle Dropdown</span>
        </button>
        <ul class="dropdown-menu" role="menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
      <div class="btn-group dropup">
        <button type="button" class="btn btn-primary">Right dropup</button>
        <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
          <span class="caret"></span>
          <span class="sr-only">Toggle Dropdown</span>
        </button>
        <ul class="dropdown-menu dropdown-menu-right" role="menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
    </div>
  </div><!-- /example -->
{% highlight html %}
<div class="btn-group dropup">
  <button type="button" class="btn btn-default">Dropup</button>
  <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
    <span class="caret"></span>
    <span class="sr-only">Toggle Dropdown</span>
  </button>
  <ul class="dropdown-menu" role="menu">
    <!-- Dropdown menu links -->
  </ul>
</div>
{% endhighlight %}
</div>