Dropdowns

  <button-dropdown>
    <!--[content] element is the trigger-->
    <span content class="material-icons">attachment</span>

    <!--[list] element(s) will be listed in dropdown menu-->
    <ul list class="dropdown-menu">
      <li class="dropdown-item"><a>elem</a></li>
      <li class="dropdown-item"><a>elem</a></li>
      <li class="dropdown-item"><a>elem</a></li>
    </ul>
  </button-dropdown>
      

  none