Use add_class for default so Tailwind finds it

Otherwise these styles are purged which we don't want.

lib/active_admin/component.rb

@@ -1,12 +1,5 @@
 # frozen_string_literal: true
 module ActiveAdmin
   class Component < Arbre::Component
-    def initialize(*)
-      super
-      add_class default_class_name
-    end
-
-    def default_class_name
-    end
   end
 end

lib/active_admin/views/components/active_filters_sidebar_content.rb

@@ -8,17 +8,14 @@ class ActiveFiltersSidebarContent < ActiveAdmin::Component
       builder_method :active_filters_sidebar_content
 
       def build
+        add_class "active-filters"
         active_filters = ActiveAdmin::Filters::Active.new(active_admin_config, assigns[:search])
         active_scopes = assigns[:search].instance_variable_get(:@scope_args)
 
         scope_block(current_scope)
         filters_list(active_filters, active_scopes)
       end
 
-      def default_class_name
-        "active-filters"
-      end
-
       def scope_block(current_scope)
         if current_scope
           h3 I18n.t("active_admin.search_status.title_with_scope", name: scope_name(current_scope)), class: "active-filters-title"

lib/active_admin/views/components/attributes_table.rb

@@ -11,6 +11,7 @@ def build(obj, *attrs)
         options = {}
         options[:for] = @collection.first if single_record?
         super(options)
+        add_class "attributes-table"
         @table = table
         build_colgroups
         rows(*attrs)
@@ -43,10 +44,6 @@ def default_id_for_prefix
         "attributes_table"
       end
 
-      def default_class_name
-        "attributes-table"
-      end
-
       # Build Colgroups
       #
       # Colgroups are only necessary for a collection of records; not

lib/active_admin/views/components/dropdown_menu.rb

@@ -34,6 +34,7 @@ def build(name, options = {})
         @menu = build_menu(menu_options)
 
         super(options)
+        add_class "dropdown"
       end
 
       def item(*args, **kwargs, &block)
@@ -46,12 +47,6 @@ def item(*args, **kwargs, &block)
         end
       end
 
-      protected
-
-      def default_class_name
-        "dropdown"
-      end
-
       private
 
       def build_button(name, options)

lib/active_admin/views/components/index_list.rb

@@ -11,10 +11,6 @@ class IndexList < ActiveAdmin::Component
 
       include ::ActiveAdmin::Helpers::Collection
 
-      def default_class_name
-        "index-button-group index-list"
-      end
-
       def tag_name
         "div"
       end
@@ -23,6 +19,7 @@ def tag_name
       #
       # @param [Array] index_classes The class constants that represent index page presenters
       def build(index_classes)
+        add_class "index-button-group index-list"
         unless current_filter_search_empty?
           index_classes.each do |index_class|
             build_index_list(index_class)

lib/active_admin/views/components/paginated_collection.rb

@@ -48,7 +48,7 @@ def build(collection, options = {})
         unless collection.respond_to?(:total_pages)
           raise(StandardError, "Collection is not a paginated scope. Set collection.page(params[:page]).per(10) before calling :paginated_collection.")
         end
-
+        add_class "paginated-collection"
         @contents = div(class: "paginated-collection-contents")
         build_pagination_with_formats(options)
         @built = true
@@ -65,10 +65,6 @@ def add_child(*args, &block)
 
       protected
 
-      def default_class_name
-        "paginated-collection"
-      end
-
       def build_pagination_with_formats(options)
         div class: "paginated-collection-pagination" do
           div page_entries_info(options).html_safe, class: "pagination-information"

lib/active_admin/views/components/scopes.rb

@@ -13,16 +13,13 @@ class Scopes < ActiveAdmin::Component
       include ActiveAdmin::ScopeChain
       include ::ActiveAdmin::Helpers::Collection
 
-      def default_class_name
-        "scopes"
-      end
-
       def tag_name
         "div"
       end
 
       def build(scopes, options = {})
         super({ role: "toolbar" })
+        add_class "scopes"
         scopes.group_by(&:group).each do |group, group_scopes|
           div class: "index-button-group", role: "group", data: { "group": group_name(group) } do
             group_scopes.each do |scope|

lib/active_admin/views/components/status_tag.rb

@@ -50,17 +50,13 @@ def build(status, options = {})
         end
 
         super(content, options)
-
+        add_class "status-tag"
         set_attribute("data-status", convert_status(status)) if status
         add_class(classes) if classes
       end
 
       protected
 
-      def default_class_name
-        "status-tag"
-      end
-
       def convert_to_boolean_status(status)
         case status
         when true, "true"

lib/active_admin/views/components/table_for.rb

@@ -20,7 +20,7 @@ def build(obj, *attrs)
 
         build_table
         super(options)
-        add_class("data-table")
+        add_class "data-table"
         columns(*attrs)
       end
 

lib/active_admin/views/components/tabs.rb

@@ -12,6 +12,7 @@ def tab(title, options = {}, &block)
 
       def build(attributes = {}, &block)
         super(attributes)
+        add_class "tabs"
         @menu = nav(class: "tabs-nav", role: "tablist", "data-tabs-toggle": "#tabs-container-#{object_id}")
         @tabs_content = div(class: "tabs-content", id: "tabs-container-#{object_id}")
       end
@@ -29,12 +30,6 @@ def build_content_item(title, options, &block)
         div(options, &block)
       end
 
-      protected
-
-      def default_class_name
-        "tabs"
-      end
-
       private
 
       def fragmentize(string)

lib/active_admin/views/index_as_table.rb

@@ -209,6 +209,7 @@ module Views
     #
     class IndexAsTable < ActiveAdmin::Component
       def build(page_presenter, collection)
+        add_class "index-as-table"
         table_options = {
           id: "index_table_#{active_admin_config.resource_name.plural}",
           sortable: true,
@@ -320,21 +321,16 @@ def defaults(resource, options = {})
         class TableActions < ActiveAdmin::Component
           builder_method :table_actions
 
-          def item *args, **kwargs
-            text_node link_to(*args, **kwargs)
+          def initialize(*)
+            super
+            add_class "data-table-resource-actions"
           end
 
-          def default_class_name
-            "data-table-resource-actions"
+          def item *args, **kwargs
+            text_node link_to(*args, **kwargs)
           end
         end
       end # IndexTableFor
-
-      protected
-
-      def default_class_name
-        "index-as-table"
-      end
     end
   end
 end

spec/unit/component_spec.rb

@@ -16,18 +16,4 @@
   it "should not have a CSS class name by default" do
     expect(component.class_list.empty?).to eq true
   end
-
-  describe "#default_class_name" do
-    let(:component_class) do
-      Class.new(described_class) do
-        def default_class_name
-          "my-component"
-        end
-      end
-    end
-
-    it "should add a default CSS class name if provided" do
-      expect(component.class_list).to include("my-component")
-    end
-  end
 end