Selection of multiple tags separated by ',' works for hardcoded array of tags.

app/assets/javascripts/application.js

@@ -14,6 +14,7 @@
 //= require jquery_ujs
 //= require jquery-ui/widgets/datepicker
 //= require jquery-ui/i18n/datepicker-es
+//= require jquery-ui/widgets/autocomplete
 //= require jquery-fileupload/basic
 //= require foundation
 //= require turbolinks
@@ -63,6 +64,7 @@
 //= require documentable
 //= require tree_navigator
 //= require custom
+//= require tag_autocomplete
 
 var initialize_modules = function() {
   App.Comments.initialize();
@@ -97,6 +99,7 @@ var initialize_modules = function() {
   App.WatchFormChanges.initialize();
   App.TreeNavigator.initialize();
   App.Documentable.initialize();
+  App.TagAutocomplete.initialize();
 };
 
 $(function(){