common/static/common/styles/_extension.sass

@@ -368,10 +368,15 @@
 
   +margin(0, top)
 
-.dropdown-item
-  &a
+a
+  &.dropdown-item
     +padding(3, x)
 
+a
+  &.dropdown-item-disabled
+    opacity: .5
+    pointer-events: none
+
 .extension-icon
   width: var(--fs-h1)
 

teams/templates/teams/team_list.html

@@ -45,7 +45,8 @@
                     <ul class="dropdown-menu dropdown-menu-right js-dropdown-menu" id="team-{{ team.id }}">
                       <li>
                         {# TODO: add page leave team base and link #}
-                        <a class="dropdown-item" href="#"><i class="i-log-out"></i>Leave Team</a>
+                        {# TODO: add conditional class 'dropdown-item-disabled' if user is the only manager #}
+                        <a class="dropdown-item {% comment %}dropdown-item-disabled{% endcomment %}" href="#"><i class="i-log-out"></i>Leave Team</a>
                       </li>
                     </ul>
                   </div>