Use `gl` namespace and explicitly check that string is empty

app/assets/javascripts/dispatcher.js

@@ -126,12 +126,12 @@
           new NotificationsDropdown();
           break;
         case 'groups:group_members:index':
-          new MemberExpirationDate();
+          new gl.MemberExpirationDate();
           new GroupMembers();
           new UsersSelect();
           break;
         case 'projects:project_members:index':
-          new MemberExpirationDate();
+          new gl.MemberExpirationDate();
           new ProjectMembers();
           new UsersSelect();
           break;
@@ -173,7 +173,7 @@
           new BuildArtifacts();
           break;
         case 'projects:group_links:index':
-          new MemberExpirationDate();
+          new gl.MemberExpirationDate();
           new GroupsSelect();
           break;
         case 'search:show':

app/assets/javascripts/member_expiration_date.js

@@ -4,14 +4,14 @@
   // `js-clear-input` element, then show that element when there is a value in the
   // datepicker, and make clicking on that element clear the field.
   //
-  this.MemberExpirationDate = function() {
+  gl.MemberExpirationDate = function() {
     $('.js-access-expiration-date').each(function(i, element) {
       var expirationDateInput = $(element);
       if (expirationDateInput.hasClass('hasDatepicker')) { return; }
       function toggleClearInput() {
-        expirationDateInput.parent().toggleClass('has-value', !!expirationDateInput.val());
+        expirationDateInput.closest('.clearable-input').toggleClass('has-value', expirationDateInput.val() !== '');
       }
       expirationDateInput.datepicker({