Enhancements

app/assets/javascripts/flash.js.coffee

 class @Flash
-  constructor: (message, type)->
+  constructor: (message, type = 'alert')->
     @flash = $(".flash-container")
     @flash.html("")
 

app/assets/javascripts/gl_dropdown.js.coffee

@@ -460,10 +460,10 @@ class GitLabDropdown
       el.addClass ACTIVE_CLASS
       el.removeClass INDETERMINATE_CLASS
 
-      if !value?
+      if not value?
         field.remove()
 
-      if !field.length and fieldName
+      if not field.length and fieldName
         @addInput(fieldName, value)
 
       return selectedObject
@@ -491,14 +491,12 @@ class GitLabDropdown
 
   addInput: (fieldName, value)->
     # Create hidden input for form
-    input = "<input type='hidden' name='#{fieldName}' value='#{value}' />"
+    $input = $("<input type='hidden' name='#{fieldName}' value='#{value}' />")
+
     if @options.inputId?
-      input = $(input)
-                .attr('id', @options.inputId)
-    @dropdown.before input
+      $input.attr('id', @options.inputId)
 
-  removeInputs: ->
-    @dropdown.parent().find('input[type="hidden"]').remove()
+    @dropdown.before $input
 
   selectRowAtIndex: (e, index) ->
     selector = ".dropdown-content li:not(.divider,.dropdown-header,.separator):eq(#{index}) a"

app/assets/javascripts/issues-bulk-assignment.js.coffee

@@ -32,10 +32,9 @@ class @IssuableBulkActions
       location.reload()
 
     xhr.fail ->
-      console.error 'fail'
+      new Flash("Issue update failed")
 
-    xhr.always ->
-      _this.onFormSubmitAlways()
+    xhr.always @onFormSubmitAlways.bind(@)
 
   onFormSubmitAlways: ->
     @form.find('[type="submit"]').enable()
@@ -49,7 +48,7 @@ class @IssuableBulkActions
     @getSelectedIssues().map ->
       _labels = $(@).data('labels')
       if _labels
-        _labels.map (labelId)->
+        _labels.map (labelId) ->
           labels.push(labelId) if labels.indexOf(labelId) is -1
 
     labels
@@ -85,10 +84,10 @@ class @IssuableBulkActions
         add_label_ids     : []
         remove_label_ids  : []
 
-    for id in @getLabelsToApply()
+    @getLabelsToApply().map (id) ->
       formData.update.add_label_ids.push id
 
-    for id in @getLabelsToRemove()
+    @getLabelsToRemove().map (id) ->
       formData.update.remove_label_ids.push id
 
     formData
@@ -97,7 +96,7 @@ class @IssuableBulkActions
     labelIds = []
     $labels = @form.find('.labels-filter input[name="update[label_ids][]"]')
 
-    for label in $labels
+    $labels.each (k, label) ->
       labelIds.push $(label).val() if label
 
     labelIds

spec/features/issues/bulk_assigment_labels_spec.rb

@@ -27,7 +27,7 @@ feature 'Issues > Labels bulk assignment', feature: true do
           before do
             check 'check_all_issues'
             open_labels_dropdown ['bug']
-            click_button 'Update issues'
+            update_issues
           end
 
           it do
@@ -40,7 +40,7 @@ feature 'Issues > Labels bulk assignment', feature: true do
           before do
             check "selected_issue_#{issue1.id}"
             open_labels_dropdown ['bug']
-            click_button 'Update issues'
+            update_issues
           end
 
           it do
@@ -55,7 +55,7 @@ feature 'Issues > Labels bulk assignment', feature: true do
           before do
             check 'check_all_issues'
             open_labels_dropdown ['bug', 'feature']
-            click_button 'Update issues'
+            update_issues
           end
 
           it do
@@ -70,7 +70,7 @@ feature 'Issues > Labels bulk assignment', feature: true do
           before do
             check "selected_issue_#{issue1.id}"
             open_labels_dropdown ['bug', 'feature']
-            click_button 'Update issues'
+            update_issues
           end
 
           it do
@@ -95,7 +95,7 @@ feature 'Issues > Labels bulk assignment', feature: true do
 
           check 'check_all_issues'
           unmark_labels_in_dropdown ['bug', 'feature']
-          click_button 'Update issues'
+          update_issues
         end
 
         it do
@@ -115,7 +115,7 @@ feature 'Issues > Labels bulk assignment', feature: true do
 
           check_issue issue1
           unmark_labels_in_dropdown ['bug']
-          click_button 'Update issues'
+          update_issues
         end
 
         it do
@@ -136,7 +136,7 @@ feature 'Issues > Labels bulk assignment', feature: true do
           check_issue issue1
           check_issue issue2
           unmark_labels_in_dropdown ['bug']
-          click_button 'Update issues'
+          update_issues
         end
 
         it do
@@ -188,4 +188,9 @@ feature 'Issues > Labels bulk assignment', feature: true do
       check "selected_issue_#{issue.id}"
     end
   end
+
+  def update_issues
+    click_button 'Update issues'
+    wait_for_ajax
+  end
 end