demo.html

<div ng-controller="DropdownCtrl">
    <!-- Simple dropdown -->
    <span class="dropdown" dropdown on-toggle="toggled(open)">
      <a href class="dropdown-toggle" dropdown-toggle>
        Click me for a dropdown, yo!
      </a>
      <ul class="dropdown-menu">
        <li ng-repeat="choice in items">
          <a href>{{choice}}</a>
        </li>
      </ul>
    </span>

    <!-- Single button -->
    <div class="btn-group" dropdown is-open="status.isopen">
      <button type="button" class="btn btn-primary dropdown-toggle" dropdown-toggle ng-disabled="disabled">
        Button dropdown <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>

    <!-- Split button -->
    <div class="btn-group" dropdown>
      <button type="button" class="btn btn-danger">Action</button>
      <button type="button" class="btn btn-danger dropdown-toggle" dropdown-toggle>
        <span class="caret"></span>
        <span class="sr-only">Split button!</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>

    <hr />
    <p>
        <button type="button" class="btn btn-default btn-sm" ng-click="toggleDropdown($event)">Toggle button dropdown</button>
        <button type="button" class="btn btn-warning btn-sm" ng-click="disabled = !disabled">Enable/Disable</button>
    </p>

</div>