demo/src/app/components/+dropdown/demos/dropup/dropup.html
<div class="btn-group" dropdown [dropup]="isDropup">
<button id="button-dropup" dropdownToggle type="button" class="btn btn-primary dropdown-toggle"
aria-controls="dropdown-dropup">
Dropup <span class="caret"></span>
</button>
<ul id="dropdown-dropup" *dropdownMenu class="dropdown-menu"
role="menu" aria-labelledby="button-dropup">
<li role="menuitem"><a class="dropdown-item" href="#">Action</a></li>
<li role="menuitem"><a class="dropdown-item" href="#">Another action</a>
</li>
<li role="menuitem"><a class="dropdown-item" href="#">Something else
here</a></li>
<li class="divider dropdown-divider"></li>
<li role="menuitem"><a class="dropdown-item" href="#">Separated link</a>
</li>
</ul>
</div>