valor-software/angular2-bootstrap

<div class="btn-group" dropdown [autoClose]="false" container="body">
  <button id="button-nested" dropdownToggle type="button" class="btn btn-primary dropdown-toggle"
          aria-controls="dropdown-nested">
    This dropdown has nested submenu <span class="caret"></span>
  </button>
  <ul id="dropdown-nested" *dropdownMenu class="dropdown-menu"
      role="menu" aria-labelledby="button-nested">
    <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Action</a></li>

    <li role="menuitem" dropdown triggers="mouseover" placement="right" container="body">
      <a dropdownToggle class="dropdown-item dropdown-toggle"
         (click)="false">Hover me for nested dropdown <span class="caret"></span></a>
      <ul *dropdownMenu class="dropdown-menu" role="menu">
        <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Action</a></li>
        <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Action1</a></li>
        <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Action2</a></li>
      </ul>
    </li>

    <li role="menuitem" dropdown triggers="mouseover" placement="right" container="body">
      <a dropdownToggle class="dropdown-item dropdown-toggle"
         (click)="false">Hover me for nested dropdown <span class="caret"></span></a>
      <ul *dropdownMenu class="dropdown-menu" role="menu">
        <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Action</a></li>
        <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Action1</a></li>
        <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Action2</a></li>
      </ul>
    </li>

    <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Something else here</a></li>
    <li class="divider dropdown-divider"></li>
    <li role="menuitem"><a class="dropdown-item" href="#/dropdowns#nested">Separated link</a></li>
  </ul>
</div>