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<div class="bs-docs-section">
  <h1 id="dropdowns" class="page-header">Dropdowns <small>dropdown.js</small></h1>

  <h2 id="dropdowns-examples">Examples</h2>
  <p>Add dropdown menus to nearly anything with this simple plugin, including the navbar, tabs, and pills.</p>

  <h3>Within a navbar</h3>
  <div class="bs-example">
    <nav id="navbar-example" class="navbar navbar-default navbar-static">
      <div class="container-fluid">
        <div class="navbar-header">
          <button class="navbar-toggle collapsed" type="button" data-toggle="collapse" data-target=".bs-example-js-navbar-collapse">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
          <a class="navbar-brand" href="#">Project Name</a>
        </div>
        <div class="collapse navbar-collapse bs-example-js-navbar-collapse">
          <ul class="nav navbar-nav">
            <li class="dropdown">
              <a id="drop1" href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
                Dropdown
                <span class="caret"></span>
              </a>
              <ul class="dropdown-menu" aria-labelledby="drop1">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li role="separator" class="divider"></li>
                <li><a href="#">Separated link</a></li>
              </ul>
            </li>
            <li class="dropdown">
              <a id="drop2" href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
                Dropdown
                <span class="caret"></span>
              </a>
              <ul class="dropdown-menu" aria-labelledby="drop2">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li role="separator" class="divider"></li>
                <li><a href="#">Separated link</a></li>
              </ul>
            </li>
          </ul>
          <ul class="nav navbar-nav navbar-right">
            <li id="fat-menu" class="dropdown">
              <a id="drop3" href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
                Dropdown
                <span class="caret"></span>
              </a>
              <ul class="dropdown-menu" aria-labelledby="drop3">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li role="separator" class="divider"></li>
                <li><a href="#">Separated link</a></li>
              </ul>
            </li>
          </ul>
        </div><!-- /.nav-collapse -->
      </div><!-- /.container-fluid -->
    </nav> <!-- /navbar-example -->
  </div> <!-- /example -->

  <h3>Within pills</h3>
  <div class="bs-example">
    <ul class="nav nav-pills" role="tablist">
      <li role="presentation" class="active"><a href="#">Regular link</a></li>
      <li role="presentation" class="dropdown">
        <a id="drop4" href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
          Dropdown
          <span class="caret"></span>
        </a>
        <ul id="menu1" class="dropdown-menu" aria-labelledby="drop4">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </li>
      <li role="presentation" class="dropdown">
        <a id="drop5" href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
          Dropdown
          <span class="caret"></span>
        </a>
        <ul id="menu2" class="dropdown-menu" aria-labelledby="drop5">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </li>
      <li role="presentation" class="dropdown">
        <a id="drop6" href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
          Dropdown
          <span class="caret"></span>
        </a>
        <ul id="menu3" class="dropdown-menu" aria-labelledby="drop6">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </li>
    </ul> <!-- /pills -->
  </div> <!-- /example -->


  <h2 id="dropdowns-usage">Usage</h2>
  <p>Via data attributes or JavaScript, the dropdown plugin toggles hidden content (dropdown menus) by toggling the <code>.open</code> class on the parent list item.</p>
  <p>On mobile devices, opening a dropdown adds a <code>.dropdown-backdrop</code> as a tap area for closing dropdown menus when tapping outside the menu, a requirement for proper iOS support. <strong class="text-danger">This means that switching from an open dropdown menu to a different dropdown menu requires an extra tap on mobile.</strong></p>
  <p>Note: The <code>data-toggle="dropdown"</code> attribute is relied on for closing dropdown menus at an application level, so it's a good idea to always use it.</p>

  <h3>Via data attributes</h3>
  <p>Add <code>data-toggle="dropdown"</code> to a link or button to toggle a dropdown.</p>
{% highlight html %}
<div class="dropdown">
  <button id="dLabel" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Dropdown trigger
    <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" aria-labelledby="dLabel">
    ...
  </ul>
</div>
{% endhighlight %}
  <p>To keep URLs intact with link buttons, use the <code>data-target</code> attribute instead of <code>href="#"</code>.</p>
{% highlight html %}
<div class="dropdown">
  <a id="dLabel" data-target="#" href="http://example.com" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
    Dropdown trigger
    <span class="caret"></span>
  </a>

  <ul class="dropdown-menu" aria-labelledby="dLabel">
    ...
  </ul>
</div>
{% endhighlight %}

  <h3>Via JavaScript</h3>
  <p>Call the dropdowns via JavaScript:</p>
{% highlight js %}
$('.dropdown-toggle').dropdown()
{% endhighlight %}
  <div class="bs-callout bs-callout-info" id="callout-dropdowns-data-required">
    <h4><code>data-toggle="dropdown"</code> still required</h4>
    <p>Regardless of whether you call your dropdown via JavaScript or instead use the data-api, <code>data-toggle="dropdown"</code> is always required to be present on the dropdown's trigger element.</p>
  </div>

  <h3 id="dropdowns-options">Options</h3>
  <p><em>None</em></p>

  <h3 id="dropdowns-methods">Methods</h3>
  <h4><code>$().dropdown('toggle')</code></h4>
  <p>Toggles the dropdown menu of a given navbar or tabbed navigation.</p>

  <h3 id="dropdowns-events">Events</h3>
  <p>All dropdown events are fired at the <code>.dropdown-menu</code>'s parent element.</p>
  <p>All dropdown events have a <code>relatedTarget</code> property, whose value is the toggling anchor element.</p>
  <div class="table-responsive">
    <table class="table table-bordered table-striped bs-events-table">
      <thead>
        <tr>
          <th>Event Type</th>
          <th>Description</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <td>show.bs.dropdown</td>
          <td>This event fires immediately when the show instance method is called.</td>
        </tr>
        <tr>
          <td>shown.bs.dropdown</td>
          <td>This event is fired when the dropdown has been made visible to the user (will wait for CSS transitions, to complete).</td>
        </tr>
        <tr>
          <td>hide.bs.dropdown</td>
          <td>This event is fired immediately when the hide instance method has been called.</td>
        </tr>
        <tr>
          <td>hidden.bs.dropdown</td>
          <td>This event is fired when the dropdown has finished being hidden from the user (will wait for CSS transitions, to complete).</td>
        </tr>
      </tbody>
    </table>
  </div><!-- ./bs-table-responsive -->
{% highlight js %}
$('#myDropdown').on('show.bs.dropdown', function () {
  // do something…
})
{% endhighlight %}
</div>
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