Dropdowns - Disabled

Add .disabled to a <li> in the dropdown to disable the link. 

<div class="dropdown">
    <button class="btn dropdown-toggle sr-only" type="button" id="dropdownMenu">Dropdown</button>
    <!-- Disabled Item -->
    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu" id="dropdownMenu">
      <li role="presentation"><a role="menuitem" aria-labelledby="dropdownMenu" tabindex="-1" href="#">Action</a></li>
      <li role="presentation" class="disabled"><a role="menuitem" aria-labelledby="dropdownMenu" tabindex="-1" href="#">Another action</a></li>
    </ul>
  </div>