<div class="btn-group mr-2 mb-2" ngbDropdown>
<button type="button" class="btn btn-primary" ngbDropdownToggle>
<!-- /dropdown button -->
<a class="dropdown-item" href="javascript:void(0)">Action</a>
<a class="dropdown-item" href="javascript:void(0)">Another action</a>
<a class="dropdown-item" href="javascript:void(0)">Something else here</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="javascript:void(0)">Separated link</a>
<div class="btn-group mr-2 mb-2" ngbDropdown>
<button type="button" class="btn btn-secondary" ngbDropdownToggle>
<!-- /dropdown button -->
<a class="dropdown-item" href="javascript:void(0)">Action</a>
<a class="dropdown-item" href="javascript:void(0)">Another action</a>
<a class="dropdown-item" href="javascript:void(0)">Something else here</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="javascript:void(0)">Separated link</a>
<div class="btn-group mr-2 mb-2" ngbDropdown>
<button type="button" class="btn btn-success" ngbDropdownToggle>
<!-- /dropdown button -->
<a class="dropdown-item" href="javascript:void(0)">Action</a>
<a class="dropdown-item" href="javascript:void(0)">Another action</a>
<a class="dropdown-item" href="javascript:void(0)">Something else here</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="javascript:void(0)">Separated link</a>