Custom Dropdown Component

custom-dropdown.component.html

<div class="btn-group" dropdown>
  <button id="button-basic" dropdownToggle type="button" 
          class="btn btn-primary dropdown-toggle"
          aria-controls="dropdown-basic">
            {{ selectedOption }} <span class="caret"></span>
  </button>
  
  <ul id="dropdown-basic" *dropdownMenu class="dropdown-menu"
      role="menu" aria-labelledby="button-basic">
    <li role="menuitem" *ngFor="let option of options">
      <span class="dropdown-item"> 
          {{ option }} 
      </span>
    </li>
  </ul>
</div>