From e99cb0a2573106c6286b8fc50b287c4f994ef539 Mon Sep 17 00:00:00 2001
From: "M.Shibuya" <mit.shibuya@gmail.com>
Date: Sat, 6 Nov 2021 16:38:39 +0900
Subject: [PATCH 1/5] Use Ruby3 compatible version of mlb

---
 spec/dummy_app/Gemfile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spec/dummy_app/Gemfile b/spec/dummy_app/Gemfile
index dbac492daa..5039293c32 100644
--- a/spec/dummy_app/Gemfile
+++ b/spec/dummy_app/Gemfile
@@ -30,10 +30,11 @@ gem 'carrierwave', '>= 2.0.0.rc', '< 3.0'
 gem 'devise', '>= 3.2'
 gem 'dragonfly', '~> 1.0'
 gem 'mini_magick', '>= 3.4'
-gem 'mlb', '>= 0.7'
+gem 'mlb', '>= 0.7', github: 'mshibuya/mlb', branch: 'ruby-3'
 gem 'paperclip', '>= 3.4'
 gem 'rails_admin', path: '../../'
 gem 'shrine', '~> 3.0'
+gem 'webrick', '~> 1.7'
 
 # Gems used only for assets and not required
 # in production environments by default.

From b304c6c38a27f734e4a3952c24b0ef8384d8e4da Mon Sep 17 00:00:00 2001
From: "M.Shibuya" <mit.shibuya@gmail.com>
Date: Sat, 6 Nov 2021 16:42:19 +0900
Subject: [PATCH 2/5] Remove remotipart dependency

Because rails-ujs has the same functionality now.
https://github.com/rails/rails/blob/f95c0b7e96eb36bc3efc0c5beffbb9e84ea664e4/actionview/app/assets/javascripts/rails-ujs/features/remote.coffee#L36-L37
---
 app/assets/javascripts/rails_admin/rails_admin.js | 1 -
 lib/rails_admin/engine.rb                         | 1 -
 rails_admin.gemspec                               | 1 -
 3 files changed, 3 deletions(-)

diff --git a/app/assets/javascripts/rails_admin/rails_admin.js b/app/assets/javascripts/rails_admin/rails_admin.js
index 0850ec2a76..8a5586ef0d 100644
--- a/app/assets/javascripts/rails_admin/rails_admin.js
+++ b/app/assets/javascripts/rails_admin/rails_admin.js
@@ -1,6 +1,5 @@
 //=  require 'jquery3'
 //=  require 'rails-ujs'
-//=  require 'jquery.remotipart'
 //=  require 'rails_admin/jquery-ui'
 //=  require 'rails_admin/moment-with-locales'
 //=  require 'rails_admin/bootstrap-datetimepicker'
diff --git a/lib/rails_admin/engine.rb b/lib/rails_admin/engine.rb
index 9b2cb2fd6e..66506cd8aa 100644
--- a/lib/rails_admin/engine.rb
+++ b/lib/rails_admin/engine.rb
@@ -5,7 +5,6 @@
 require 'rack-pjax'
 require 'rails'
 require 'rails_admin'
-require 'remotipart'
 
 module RailsAdmin
   class Engine < Rails::Engine
diff --git a/rails_admin.gemspec b/rails_admin.gemspec
index 696eacf733..1d7c12c622 100644
--- a/rails_admin.gemspec
+++ b/rails_admin.gemspec
@@ -13,7 +13,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'nested_form', '~> 0.3'
   spec.add_dependency 'rack-pjax', '>= 0.7'
   spec.add_dependency 'rails', ['>= 6.0', '< 8']
-  spec.add_dependency 'remotipart', '~> 1.3'
   spec.add_dependency 'sassc-rails', ['>= 1.3', '< 3']
   spec.add_dependency 'activemodel-serializers-xml', '>= 1.0'
   spec.add_development_dependency 'bundler', '>= 1.0'

From a7d3599c30d2a3044890d7db1f8417f5d01e9ae5 Mon Sep 17 00:00:00 2001
From: "M.Shibuya" <mit.shibuya@gmail.com>
Date: Sat, 13 Nov 2021 13:40:09 +0900
Subject: [PATCH 3/5] Remove bootstrap-sass code, which is no longer relevant

---
 lib/rails_admin.rb                            |  2 -
 lib/rails_admin/bootstrap-sass.rb             | 49 -------------------
 .../bootstrap-sass/compass_functions.rb       | 28 -----------
 .../bootstrap-sass/sass_functions.rb          | 16 ------
 4 files changed, 95 deletions(-)
 delete mode 100755 lib/rails_admin/bootstrap-sass.rb
 delete mode 100755 lib/rails_admin/bootstrap-sass/compass_functions.rb
 delete mode 100755 lib/rails_admin/bootstrap-sass/sass_functions.rb

diff --git a/lib/rails_admin.rb b/lib/rails_admin.rb
index bc08f44614..d75c91c88e 100644
--- a/lib/rails_admin.rb
+++ b/lib/rails_admin.rb
@@ -55,5 +55,3 @@ def self.yaml_dump(object)
     YAML.dump(object)
   end
 end
-
-require 'rails_admin/bootstrap-sass' unless defined? Bootstrap
diff --git a/lib/rails_admin/bootstrap-sass.rb b/lib/rails_admin/bootstrap-sass.rb
deleted file mode 100755
index 82fd00730d..0000000000
--- a/lib/rails_admin/bootstrap-sass.rb
+++ /dev/null
@@ -1,49 +0,0 @@
-module RailsAdmin
-  module Bootstrap
-    class FrameworkNotFound < StandardError; end
-
-    # Inspired by Kaminari
-    def self.load!
-      if compass?
-        require 'rails_admin/bootstrap-sass/compass_functions'
-        register_compass_extension
-      elsif asset_pipeline?
-        require 'rails_admin/bootstrap-sass/sass_functions'
-      end
-
-      require 'sassc-rails' if rails?
-
-      unless rails? || compass?
-        raise(Bootstrap::FrameworkNotFound.new('bootstrap-sass requires either Rails > 3.1 or Compass, neither of which are loaded'))
-      end
-
-      if defined?(::Sass) && ::Sass.respond_to?(:load_paths)
-        stylesheets = File.expand_path(File.join('..', 'vendor', 'assets', 'stylesheets'))
-        fonts = File.expand_path(File.join('..', 'vendor', 'assets', 'fonts'))
-        ::Sass.load_paths << stylesheets
-        ::Sass.load_paths << fonts
-      end
-    end
-
-    def self.asset_pipeline?
-      defined?(::Sprockets)
-    end
-
-    def self.compass?
-      defined?(::Compass)
-    end
-
-    def self.rails?
-      defined?(::Rails)
-    end
-
-    def self.register_compass_extension
-      base = File.join(File.dirname(__FILE__), '..')
-      styles = File.join(base, 'vendor', 'assets', 'stylesheets')
-      templates = File.join(base, 'templates')
-      ::Compass::Frameworks.register('bootstrap', path: base, stylesheets_directory: styles, templates_directory: templates)
-    end
-  end
-end
-
-RailsAdmin::Bootstrap.load!
diff --git a/lib/rails_admin/bootstrap-sass/compass_functions.rb b/lib/rails_admin/bootstrap-sass/compass_functions.rb
deleted file mode 100755
index 3e5ff870fa..0000000000
--- a/lib/rails_admin/bootstrap-sass/compass_functions.rb
+++ /dev/null
@@ -1,28 +0,0 @@
-module Sass
-  module Script
-    module Functions
-      def image_path(source, _options = {})
-        if defined?(::Sprockets)
-          ::Sass::Script::String.new sprockets_context.image_path(source.value).to_s, :string
-        elsif defined?(::Compass)
-          image_url(source, Sass::Script::Bool.new(true))
-        else
-          # Revert to the old compass-agnostic path determination
-          asset_sans_quotes = source.value.delete('"')
-          Sass::Script::String.new("/images/#{asset_sans_quotes}", :string)
-        end
-      end
-
-    protected
-
-      def sprockets_context # :nodoc:
-        if options.key?(:sprockets)
-          options[:sprockets][:context]
-        else
-          # Compatibility with sprockets pre 2.10.0
-          options[:importer].context
-        end
-      end
-    end
-  end
-end
diff --git a/lib/rails_admin/bootstrap-sass/sass_functions.rb b/lib/rails_admin/bootstrap-sass/sass_functions.rb
deleted file mode 100755
index 146bc32666..0000000000
--- a/lib/rails_admin/bootstrap-sass/sass_functions.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-module Sass
-  module Script
-    module Functions
-      # LARS: Snatched from compass - 2011-11-29 - used for gradients in IE6-9
-      # returns an IE hex string for a color with an alpha channel
-      # suitable for passing to IE filters.
-      def ie_hex_str(color)
-        assert_type color, :Color
-        alpha = (color.alpha * 255).round
-        alphastr = alpha.to_s(16).rjust(2, '0')
-        Sass::Script::String.new("##{alphastr}#{color.send(:hex_str)[1..-1]}".upcase)
-      end
-      declare :ie_hex_str, [:color] if respond_to?(:declare)
-    end
-  end
-end

From 972275d992f34c47a9f0cc4d89ff01cdbc0d0aed Mon Sep 17 00:00:00 2001
From: "M.Shibuya" <mit.shibuya@gmail.com>
Date: Sun, 14 Nov 2021 17:06:15 +0900
Subject: [PATCH 4/5] Add ability to test with Webpacker-built assets

---
 .github/workflows/test.yml                    | 17 +++-
 .gitignore                                    |  7 +-
 .rspec                                        |  1 +
 .rubocop.yml                                  |  4 +-
 Gemfile                                       |  1 +
 app/views/layouts/rails_admin/_head.html.haml |  8 +-
 gemfiles/rails_6.0.gemfile                    |  1 +
 gemfiles/rails_6.1.gemfile                    |  1 +
 gemfiles/rails_7.0.gemfile                    |  1 +
 lib/rails_admin/config.rb                     |  4 +
 lib/rails_admin/engine.rb                     | 10 +-
 package.json                                  | 21 +++++
 spec/dummy_app/.browserslistrc                |  1 +
 spec/dummy_app/.gitignore                     |  8 ++
 spec/dummy_app/Gemfile                        |  1 +
 .../app/assets/javascripts/application.js     |  3 +-
 .../app/javascript/packs/application.js       | 18 ++++
 .../app/javascript/packs/rails_admin.js       |  2 +
 .../javascript/stylesheets/rails_admin.scss   |  1 +
 spec/dummy_app/babel.config.js                | 82 ++++++++++++++++
 spec/dummy_app/bin/webpack                    | 18 ++++
 spec/dummy_app/bin/webpack-dev-server         | 18 ++++
 spec/dummy_app/config/application.rb          |  8 +-
 spec/dummy_app/config/boot.rb                 |  1 +
 .../config/environments/development.rb        | 28 +++---
 spec/dummy_app/config/initializers/assets.rb  |  2 +-
 spec/dummy_app/config/webpack/development.js  |  5 +
 spec/dummy_app/config/webpack/environment.js  | 11 +++
 spec/dummy_app/config/webpack/production.js   |  5 +
 spec/dummy_app/config/webpack/test.js         |  5 +
 spec/dummy_app/config/webpacker.yml           | 93 +++++++++++++++++++
 spec/dummy_app/package.json                   | 14 +++
 spec/dummy_app/postcss.config.js              | 12 +++
 spec/integration/rails_admin_spec.rb          | 14 ++-
 spec/spec_helper.rb                           |  4 +
 35 files changed, 399 insertions(+), 31 deletions(-)
 create mode 100644 package.json
 create mode 100644 spec/dummy_app/.browserslistrc
 create mode 100644 spec/dummy_app/app/javascript/packs/application.js
 create mode 100644 spec/dummy_app/app/javascript/packs/rails_admin.js
 create mode 100644 spec/dummy_app/app/javascript/stylesheets/rails_admin.scss
 create mode 100644 spec/dummy_app/babel.config.js
 create mode 100755 spec/dummy_app/bin/webpack
 create mode 100755 spec/dummy_app/bin/webpack-dev-server
 create mode 100644 spec/dummy_app/config/webpack/development.js
 create mode 100644 spec/dummy_app/config/webpack/environment.js
 create mode 100644 spec/dummy_app/config/webpack/production.js
 create mode 100644 spec/dummy_app/config/webpack/test.js
 create mode 100644 spec/dummy_app/config/webpacker.yml
 create mode 100644 spec/dummy_app/package.json
 create mode 100644 spec/dummy_app/postcss.config.js

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ebb0e195d4..d4273f7bc7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,35 +12,43 @@ jobs:
         gemfile: [ gemfiles/rails_6.1.gemfile ]
         orm: [ active_record ]
         adapter: [ sqlite3 ]
+        asset: [ webpacker ]
         include:
           - ruby: 2.5
             gemfile: gemfiles/rails_6.0.gemfile
             orm: active_record
             adapter: sqlite3
+            asset: webpacker
           - ruby: 3.0
             gemfile: gemfiles/rails_6.1.gemfile
             orm: active_record
             adapter: mysql2
+            asset: webpacker
           - ruby: 3.0
             gemfile: gemfiles/rails_6.1.gemfile
             orm: active_record
             adapter: postgresql
+            asset: webpacker
           - ruby: 3.0
             gemfile: gemfiles/rails_7.0.gemfile
             orm: active_record
             adapter: sqlite3
+            asset: webpacker
           - ruby: 2.7
             gemfile: gemfiles/rails_6.0.gemfile
             orm: mongoid
             adapter: sqlite3
+            asset: webpacker
           - ruby: 3.0
             gemfile: gemfiles/rails_6.1.gemfile
             orm: mongoid
             adapter: sqlite3
+            asset: webpacker
           - ruby: jruby
             gemfile: gemfiles/rails_6.1.gemfile
             orm: mongoid
             adapter: sqlite3
+            asset: webpacker
     runs-on: ubuntu-latest
     services:
       mysql:
@@ -64,6 +72,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
       CI_ORM: ${{ matrix.orm }}
+      CI_ASSET: ${{ matrix.asset }}
       JRUBY_OPTS: --debug
     steps:
     - uses: actions/checkout@v2
@@ -76,17 +85,23 @@ jobs:
       env:
         MAKE: make --jobs 4
         BUNDLE_WITHOUT: development
+    - name: Set up Node
+      uses: actions/setup-node@v2
+      with:
+        node-version: '14'
     - name: Setup application
       env:
         BUNDLE_GEMFILE: ../../${{ matrix.gemfile }}
         CI_DB_ADAPTER: ${{ matrix.adapter }}
         RAILS_ENV: test
       run: |
+        yarn install
         cd spec/dummy_app
         bundle exec rake rails_admin:prepare_ci_env db:create db:migrate
+        yarn install
         cd ../../
     - name: Run tests
-      run: bundle exec rake spec
+      run: bundle exec rspec
     - name: Coveralls Parallel
       uses: coverallsapp/github-action@master
       continue-on-error: true
diff --git a/.gitignore b/.gitignore
index 88aa68691b..7d482925d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,14 +5,16 @@
 .bundle
 .idea/
 .rvmrc
+.sass-cache
 .yardoc
 /.emacs.desktop
 /gemfiles/*.lock
+/node_modules/*
 /rails_admin.gems
 /spec/generators/tmp
 /spec/lib/tmp
+/yarn.lock
 Gemfile.lock
-Gemfile31.lock
 coverage/*
 db/*.sqlite3
 db/*.sqlite3-journal
@@ -26,7 +28,4 @@ spec/dummy_app/log/*.log
 spec/dummy_app/public/uploads
 spec/dummy_app/Gemfile.lock
 tmp/**/*
-/.emacs.desktop
-.idea/*.xml
-.sass-cache
 nbproject
diff --git a/.rspec b/.rspec
index 97f3a5d316..af054e7f5c 100644
--- a/.rspec
+++ b/.rspec
@@ -1,3 +1,4 @@
 --color
 --order=random
 --profile
+--exclude-pattern 'dummy_app/node_modules/rails_admin/**/*_spec.rb'
diff --git a/.rubocop.yml b/.rubocop.yml
index 5492f39a5c..8e2a87c51c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -3,11 +3,13 @@ inherit_from: .rubocop_todo.yml
 AllCops:
   Exclude:
     - 'gemfiles/*'
+    - 'node_modules/**/*'
     - 'spec/dummy_app/bin/**/*'
     - 'spec/dummy_app/db/schema.rb'
     - 'spec/dummy_app/tmp/**/*'
     - 'vendor/bundle/**/*'
   NewCops: disable
+  SuggestExtensions: false
   TargetRubyVersion: 2.5
 
 Gemspec/DateAssignment:
@@ -109,7 +111,7 @@ Metrics/MethodLength:
   Max: 29 # TODO: Lower to 15
 
 Metrics/ModuleLength:
-  Max: 202 # TODO: Lower to 100
+  Max: 204 # TODO: Lower to 100
 
 Metrics/ParameterLists:
   Max: 8 # TODO: Lower to 4
diff --git a/Gemfile b/Gemfile
index 99204a4112..4dd3bcb8f2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,6 +5,7 @@ gem 'rails'
 gem 'haml'
 gem 'devise'
 gem 'webrick', '~> 1.7'
+gem 'webpacker', require: false
 
 group :active_record do
   gem 'paper_trail'
diff --git a/app/views/layouts/rails_admin/_head.html.haml b/app/views/layouts/rails_admin/_head.html.haml
index 12e92abc52..7e9226fd65 100644
--- a/app/views/layouts/rails_admin/_head.html.haml
+++ b/app/views/layouts/rails_admin/_head.html.haml
@@ -3,5 +3,9 @@
 %meta{content: "width=device-width, initial-scale=1", name: "viewport; charset=utf-8"}
 %meta{content: "NONE,NOARCHIVE", name: "robots"}
 = csrf_meta_tag
-= stylesheet_link_tag "rails_admin/rails_admin.css", media: :all
-= javascript_include_tag "rails_admin/rails_admin.js"
+- if RailsAdmin::config.asset_source == :webpacker
+  = javascript_pack_tag "rails_admin"
+  = stylesheet_pack_tag "rails_admin"
+- else
+  = stylesheet_link_tag "rails_admin/rails_admin.css", media: :all
+  = javascript_include_tag "rails_admin/rails_admin.js"
diff --git a/gemfiles/rails_6.0.gemfile b/gemfiles/rails_6.0.gemfile
index 3bad56eedd..0d393372de 100644
--- a/gemfiles/rails_6.0.gemfile
+++ b/gemfiles/rails_6.0.gemfile
@@ -7,6 +7,7 @@ gem "rails", "~> 6.0.0"
 gem "haml"
 gem "devise", "~> 4.7"
 gem "webrick", "~> 1.7"
+gem "webpacker", require: false
 gem "sassc-rails", "~> 2.1"
 
 group :active_record do
diff --git a/gemfiles/rails_6.1.gemfile b/gemfiles/rails_6.1.gemfile
index 6a4d438690..2186a7011e 100644
--- a/gemfiles/rails_6.1.gemfile
+++ b/gemfiles/rails_6.1.gemfile
@@ -7,6 +7,7 @@ gem "rails", "~> 6.1.0"
 gem "haml"
 gem "devise", "~> 4.7"
 gem "webrick", "~> 1.7"
+gem "webpacker", require: false
 gem "sassc-rails", "~> 2.1"
 
 group :active_record do
diff --git a/gemfiles/rails_7.0.gemfile b/gemfiles/rails_7.0.gemfile
index e29e02dc1f..46476a0f8c 100644
--- a/gemfiles/rails_7.0.gemfile
+++ b/gemfiles/rails_7.0.gemfile
@@ -7,6 +7,7 @@ gem "rails", "~> 7.0.0.alpha2"
 gem "haml"
 gem "devise", "~> 4.7", github: "strobilomyces/devise", branch: "patch-1"
 gem "webrick", "~> 1.7"
+gem "webpacker", require: false
 gem "sassc-rails", "~> 2.1"
 
 group :active_record do
diff --git a/lib/rails_admin/config.rb b/lib/rails_admin/config.rb
index 951daafb00..5d4d3f472c 100644
--- a/lib/rails_admin/config.rb
+++ b/lib/rails_admin/config.rb
@@ -86,6 +86,9 @@ class << self
       attr_accessor :navigation_static_links
       attr_accessor :navigation_static_label
 
+      # Set where RailsAdmin fetches JS/CSS from, defaults to :sprockets
+      attr_accessor :asset_source
+
       # Finish initialization by executing deferred configuration blocks
       def initialize!
         @deferred_blocks.each { |block| block.call(self) }
@@ -317,6 +320,7 @@ def reset
         @show_gravatar = true
         @navigation_static_links = {}
         @navigation_static_label = nil
+        @asset_source = (defined?(Webpacker) ? :webpacker : :sprockets)
         @parent_controller = '::ActionController::Base'
         @forgery_protection_settings = {with: :exception}
         RailsAdmin::Config::Actions.reset
diff --git a/lib/rails_admin/engine.rb b/lib/rails_admin/engine.rb
index 66506cd8aa..821673bec7 100644
--- a/lib/rails_admin/engine.rb
+++ b/lib/rails_admin/engine.rb
@@ -13,10 +13,12 @@ class Engine < Rails::Engine
     config.action_dispatch.rescue_responses['RailsAdmin::ActionNotAllowed'] = :forbidden
 
     initializer 'RailsAdmin precompile hook', group: :all do |app|
-      app.config.assets.precompile += %w(
-        rails_admin/rails_admin.js
-        rails_admin/rails_admin.css
-      )
+      if app.config.respond_to?(:assets)
+        app.config.assets.precompile += %w(
+          rails_admin/rails_admin.js
+          rails_admin/rails_admin.css
+        )
+      end
     end
 
     initializer 'RailsAdmin setup middlewares' do |app|
diff --git a/package.json b/package.json
new file mode 100644
index 0000000000..5478f6d54d
--- /dev/null
+++ b/package.json
@@ -0,0 +1,21 @@
+{
+  "dependencies": {
+    "@fortawesome/fontawesome-free": "^5.15.4",
+    "@rails/ujs": "^6.1.4-1",
+    "bootstrap": "3.4.1",
+    "bootstrap-sass": "3.4.1",
+    "eonasdan-bootstrap-datetimepicker": "^4.17.49",
+    "jquery": "^3.6.0",
+    "jquery-ui": "^1.12.1",
+    "moment": "^2.29.1"
+  },
+  "directories": {
+    "src": "./src"
+  },
+  "version": "1.0.0",
+  "description": "RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data.",
+  "name": "rails_admin",
+  "scripts": {
+    "link": "yarn link && cd spec/dummy_app && yarn link rails_admin"
+  }
+}
diff --git a/spec/dummy_app/.browserslistrc b/spec/dummy_app/.browserslistrc
new file mode 100644
index 0000000000..e94f8140cc
--- /dev/null
+++ b/spec/dummy_app/.browserslistrc
@@ -0,0 +1 @@
+defaults
diff --git a/spec/dummy_app/.gitignore b/spec/dummy_app/.gitignore
index dd71abbe4e..e0c3904638 100644
--- a/spec/dummy_app/.gitignore
+++ b/spec/dummy_app/.gitignore
@@ -15,3 +15,11 @@
 /tmp
 
 /public/system
+
+/public/packs
+/public/packs-test
+/node_modules
+/yarn-error.log
+/yarn.lock
+yarn-debug.log*
+.yarn-integrity
diff --git a/spec/dummy_app/Gemfile b/spec/dummy_app/Gemfile
index 5039293c32..c1716537cc 100644
--- a/spec/dummy_app/Gemfile
+++ b/spec/dummy_app/Gemfile
@@ -1,6 +1,7 @@
 source 'https://rubygems.org'
 
 gem 'rails', '>= 6.0.0'
+gem 'webpacker', require: false
 
 group :active_record do
   platforms :jruby do
diff --git a/spec/dummy_app/app/assets/javascripts/application.js b/spec/dummy_app/app/assets/javascripts/application.js
index 9097d830e2..116e594b8d 100644
--- a/spec/dummy_app/app/assets/javascripts/application.js
+++ b/spec/dummy_app/app/assets/javascripts/application.js
@@ -10,6 +10,5 @@
 // WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
 // GO AFTER THE REQUIRES BELOW.
 //
-//= require jquery
-//= require jquery_ujs
+//= require rails-ujs
 //= require_tree .
diff --git a/spec/dummy_app/app/javascript/packs/application.js b/spec/dummy_app/app/javascript/packs/application.js
new file mode 100644
index 0000000000..7c3021d7ed
--- /dev/null
+++ b/spec/dummy_app/app/javascript/packs/application.js
@@ -0,0 +1,18 @@
+/* eslint no-console:0 */
+// This file is automatically compiled by Webpack, along with any other files
+// present in this directory. You're encouraged to place your actual application logic in
+// a relevant structure within app/javascript and only use these pack files to reference
+// that code so it'll be compiled.
+//
+// To reference this file, add <%= javascript_pack_tag 'application' %> to the appropriate
+// layout file, like app/views/layouts/application.html.erb
+
+
+// Uncomment to copy all static images under ../images to the output folder and reference
+// them with the image_pack_tag helper in views (e.g <%= image_pack_tag 'rails.png' %>)
+// or the `imagePath` JavaScript helper below.
+//
+// const images = require.context('../images', true)
+// const imagePath = (name) => images(name, true)
+
+console.log('Hello World from Webpacker')
diff --git a/spec/dummy_app/app/javascript/packs/rails_admin.js b/spec/dummy_app/app/javascript/packs/rails_admin.js
new file mode 100644
index 0000000000..dc1a49ecac
--- /dev/null
+++ b/spec/dummy_app/app/javascript/packs/rails_admin.js
@@ -0,0 +1,2 @@
+import 'rails_admin/src/base'
+import '../stylesheets/rails_admin.scss'
\ No newline at end of file
diff --git a/spec/dummy_app/app/javascript/stylesheets/rails_admin.scss b/spec/dummy_app/app/javascript/stylesheets/rails_admin.scss
new file mode 100644
index 0000000000..1fbfafa0ec
--- /dev/null
+++ b/spec/dummy_app/app/javascript/stylesheets/rails_admin.scss
@@ -0,0 +1 @@
+@import "~rails_admin/src/styles/base.scss";
\ No newline at end of file
diff --git a/spec/dummy_app/babel.config.js b/spec/dummy_app/babel.config.js
new file mode 100644
index 0000000000..19a07f3146
--- /dev/null
+++ b/spec/dummy_app/babel.config.js
@@ -0,0 +1,82 @@
+module.exports = function(api) {
+  var validEnv = ['development', 'test', 'production']
+  var currentEnv = api.env()
+  var isDevelopmentEnv = api.env('development')
+  var isProductionEnv = api.env('production')
+  var isTestEnv = api.env('test')
+
+  if (!validEnv.includes(currentEnv)) {
+    throw new Error(
+      'Please specify a valid `NODE_ENV` or ' +
+        '`BABEL_ENV` environment variables. Valid values are "development", ' +
+        '"test", and "production". Instead, received: ' +
+        JSON.stringify(currentEnv) +
+        '.'
+    )
+  }
+
+  return {
+    presets: [
+      isTestEnv && [
+        '@babel/preset-env',
+        {
+          targets: {
+            node: 'current'
+          }
+        }
+      ],
+      (isProductionEnv || isDevelopmentEnv) && [
+        '@babel/preset-env',
+        {
+          forceAllTransforms: true,
+          useBuiltIns: 'entry',
+          corejs: 3,
+          modules: false,
+          exclude: ['transform-typeof-symbol']
+        }
+      ]
+    ].filter(Boolean),
+    plugins: [
+      'babel-plugin-macros',
+      '@babel/plugin-syntax-dynamic-import',
+      isTestEnv && 'babel-plugin-dynamic-import-node',
+      '@babel/plugin-transform-destructuring',
+      [
+        '@babel/plugin-proposal-class-properties',
+        {
+          loose: true
+        }
+      ],
+      [
+        '@babel/plugin-proposal-object-rest-spread',
+        {
+          useBuiltIns: true
+        }
+      ],
+      [
+        '@babel/plugin-proposal-private-methods',
+        {
+          loose: true
+        }
+      ],
+      [
+        '@babel/plugin-proposal-private-property-in-object',
+        {
+          loose: true
+        }
+      ],
+      [
+        '@babel/plugin-transform-runtime',
+        {
+          helpers: false
+        }
+      ],
+      [
+        '@babel/plugin-transform-regenerator',
+        {
+          async: false
+        }
+      ]
+    ].filter(Boolean)
+  }
+}
diff --git a/spec/dummy_app/bin/webpack b/spec/dummy_app/bin/webpack
new file mode 100755
index 0000000000..1031168d01
--- /dev/null
+++ b/spec/dummy_app/bin/webpack
@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+
+ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
+ENV["NODE_ENV"]  ||= "development"
+
+require "pathname"
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
+  Pathname.new(__FILE__).realpath)
+
+require "bundler/setup"
+
+require "webpacker"
+require "webpacker/webpack_runner"
+
+APP_ROOT = File.expand_path("..", __dir__)
+Dir.chdir(APP_ROOT) do
+  Webpacker::WebpackRunner.run(ARGV)
+end
diff --git a/spec/dummy_app/bin/webpack-dev-server b/spec/dummy_app/bin/webpack-dev-server
new file mode 100755
index 0000000000..dd9662737a
--- /dev/null
+++ b/spec/dummy_app/bin/webpack-dev-server
@@ -0,0 +1,18 @@
+#!/usr/bin/env ruby
+
+ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
+ENV["NODE_ENV"]  ||= "development"
+
+require "pathname"
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
+  Pathname.new(__FILE__).realpath)
+
+require "bundler/setup"
+
+require "webpacker"
+require "webpacker/dev_server_runner"
+
+APP_ROOT = File.expand_path("..", __dir__)
+Dir.chdir(APP_ROOT) do
+  Webpacker::DevServerRunner.run(ARGV)
+end
diff --git a/spec/dummy_app/config/application.rb b/spec/dummy_app/config/application.rb
index e6350d480f..34e0c3e726 100644
--- a/spec/dummy_app/config/application.rb
+++ b/spec/dummy_app/config/application.rb
@@ -2,7 +2,6 @@
 
 require 'action_controller/railtie'
 require 'action_mailer/railtie'
-require 'sprockets/railtie'
 
 begin
   require CI_ORM.to_s
@@ -14,6 +13,13 @@
 require 'active_storage/engine' if CI_ORM == :active_record
 require 'action_text/engine' if CI_ORM == :active_record
 
+case CI_ASSET
+when :webpacker
+  require 'webpacker'
+else
+  require "#{CI_ASSET}/railtie"
+end
+
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
 Bundler.require(*Rails.groups, CI_ORM)
diff --git a/spec/dummy_app/config/boot.rb b/spec/dummy_app/config/boot.rb
index 8e888c88d4..48e6a20cc2 100644
--- a/spec/dummy_app/config/boot.rb
+++ b/spec/dummy_app/config/boot.rb
@@ -1,4 +1,5 @@
 CI_ORM = (ENV['CI_ORM'] || :active_record).to_sym unless defined?(CI_ORM)
+CI_ASSET = (ENV['CI_ASSET'] || :sprockets).to_sym unless defined?(CI_ASSET)
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
diff --git a/spec/dummy_app/config/environments/development.rb b/spec/dummy_app/config/environments/development.rb
index bd8043d9af..2bffc813e4 100644
--- a/spec/dummy_app/config/environments/development.rb
+++ b/spec/dummy_app/config/environments/development.rb
@@ -31,19 +31,21 @@
   # Raise an error on page load if there are pending migrations.
   config.active_record.migration_error = :page_load if CI_ORM == :active_record
 
-  # Debug mode disables concatenation and preprocessing of assets.
-  # This option may cause significant delays in view rendering with a large
-  # number of complex assets.
-  config.assets.debug = true
-
-  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
-  # yet still be able to expire them through the digest params.
-  config.assets.digest = true
-
-  # Adds additional error checking when serving assets at runtime.
-  # Checks for improperly declared sprockets dependencies.
-  # Raises helpful error messages.
-  config.assets.raise_runtime_errors = true
+  if config.respond_to?(:assets)
+    # Debug mode disables concatenation and preprocessing of assets.
+    # This option may cause significant delays in view rendering with a large
+    # number of complex assets.
+    config.assets.debug = true
+
+    # Asset digests allow you to set far-future HTTP expiration dates on all assets,
+    # yet still be able to expire them through the digest params.
+    config.assets.digest = true
+
+    # Adds additional error checking when serving assets at runtime.
+    # Checks for improperly declared sprockets dependencies.
+    # Raises helpful error messages.
+    config.assets.raise_runtime_errors = true
+  end
 
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
diff --git a/spec/dummy_app/config/initializers/assets.rb b/spec/dummy_app/config/initializers/assets.rb
index 01ef3e6630..bdc864b95d 100644
--- a/spec/dummy_app/config/initializers/assets.rb
+++ b/spec/dummy_app/config/initializers/assets.rb
@@ -1,7 +1,7 @@
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
-Rails.application.config.assets.version = '1.0'
+Rails.application.config.assets.version = '1.0' if Rails.application.config.respond_to?(:assets)
 
 # Add additional assets to the asset load path
 # Rails.application.config.assets.paths << Emoji.images_path
diff --git a/spec/dummy_app/config/webpack/development.js b/spec/dummy_app/config/webpack/development.js
new file mode 100644
index 0000000000..c5edff94ad
--- /dev/null
+++ b/spec/dummy_app/config/webpack/development.js
@@ -0,0 +1,5 @@
+process.env.NODE_ENV = process.env.NODE_ENV || 'development'
+
+const environment = require('./environment')
+
+module.exports = environment.toWebpackConfig()
diff --git a/spec/dummy_app/config/webpack/environment.js b/spec/dummy_app/config/webpack/environment.js
new file mode 100644
index 0000000000..f75acd8462
--- /dev/null
+++ b/spec/dummy_app/config/webpack/environment.js
@@ -0,0 +1,11 @@
+const webpack = require('webpack');
+const { environment } = require('@rails/webpacker')
+
+environment.plugins.append(
+    'ProvidePlugin-jQuery',
+    new webpack.ProvidePlugin({
+        jQuery: 'jquery',
+    })
+);
+
+module.exports = environment
diff --git a/spec/dummy_app/config/webpack/production.js b/spec/dummy_app/config/webpack/production.js
new file mode 100644
index 0000000000..be0f53aacf
--- /dev/null
+++ b/spec/dummy_app/config/webpack/production.js
@@ -0,0 +1,5 @@
+process.env.NODE_ENV = process.env.NODE_ENV || 'production'
+
+const environment = require('./environment')
+
+module.exports = environment.toWebpackConfig()
diff --git a/spec/dummy_app/config/webpack/test.js b/spec/dummy_app/config/webpack/test.js
new file mode 100644
index 0000000000..c5edff94ad
--- /dev/null
+++ b/spec/dummy_app/config/webpack/test.js
@@ -0,0 +1,5 @@
+process.env.NODE_ENV = process.env.NODE_ENV || 'development'
+
+const environment = require('./environment')
+
+module.exports = environment.toWebpackConfig()
diff --git a/spec/dummy_app/config/webpacker.yml b/spec/dummy_app/config/webpacker.yml
new file mode 100644
index 0000000000..390a6c5d1e
--- /dev/null
+++ b/spec/dummy_app/config/webpacker.yml
@@ -0,0 +1,93 @@
+# Note: You must restart bin/webpack-dev-server for changes to take effect
+
+default: &default
+  source_path: app/javascript
+  source_entry_path: packs
+  public_root_path: public
+  public_output_path: packs
+  cache_path: tmp/cache/webpacker
+  webpack_compile_output: true
+
+  # Additional paths webpack should lookup modules
+  # ['app/assets', 'engine/foo/app/assets']
+  additional_paths: ['node_modules/rails_admin/src']
+
+  # Reload manifest.json on all requests so we reload latest compiled packs
+  cache_manifest: false
+
+  # Extract and emit a css file
+  extract_css: false
+
+  static_assets_extensions:
+    - .jpg
+    - .jpeg
+    - .png
+    - .gif
+    - .tiff
+    - .ico
+    - .svg
+    - .eot
+    - .otf
+    - .ttf
+    - .woff
+    - .woff2
+
+  extensions:
+    - .mjs
+    - .js
+    - .sass
+    - .scss
+    - .css
+    - .module.sass
+    - .module.scss
+    - .module.css
+    - .png
+    - .svg
+    - .gif
+    - .jpeg
+    - .jpg
+
+development:
+  <<: *default
+  compile: true
+
+  # Reference: https://webpack.js.org/configuration/dev-server/
+  dev_server:
+    https: false
+    host: localhost
+    port: 3035
+    public: localhost:3035
+    hmr: false
+    # Inline should be set to true if using HMR
+    inline: true
+    overlay: true
+    compress: true
+    disable_host_check: true
+    use_local_ip: false
+    quiet: false
+    pretty: false
+    headers:
+      'Access-Control-Allow-Origin': '*'
+    watch_options:
+      ignored: '**/node_modules/**'
+
+
+test:
+  <<: *default
+  compile: true
+  additional_paths: ['src'] # relative from the project root
+
+  # Compile test packs to a separate directory
+  public_output_path: packs-test
+
+production:
+  <<: *default
+
+  # Production depends on precompilation of packs prior to booting for performance.
+  compile: false
+
+  # Extract and emit a css file
+  extract_css: true
+
+  # Cache manifest.json for performance
+  cache_manifest: true
diff --git a/spec/dummy_app/package.json b/spec/dummy_app/package.json
new file mode 100644
index 0000000000..d849b38f48
--- /dev/null
+++ b/spec/dummy_app/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "dummy_app",
+  "private": true,
+  "version": "0.1.0",
+  "dependencies": {
+    "@rails/webpacker": "5.4.3",
+    "webpack": "^4.46.0",
+    "webpack-cli": "^3.3.12",
+    "rails_admin": "file:../../"
+  },
+  "devDependencies": {
+    "webpack-dev-server": "^3"
+  }
+}
diff --git a/spec/dummy_app/postcss.config.js b/spec/dummy_app/postcss.config.js
new file mode 100644
index 0000000000..aa5998a809
--- /dev/null
+++ b/spec/dummy_app/postcss.config.js
@@ -0,0 +1,12 @@
+module.exports = {
+  plugins: [
+    require('postcss-import'),
+    require('postcss-flexbugs-fixes'),
+    require('postcss-preset-env')({
+      autoprefixer: {
+        flexbox: 'no-2009'
+      },
+      stage: 3
+    })
+  ]
+}
diff --git a/spec/integration/rails_admin_spec.rb b/spec/integration/rails_admin_spec.rb
index a4bc13ba1a..a4168a5c79 100644
--- a/spec/integration/rails_admin_spec.rb
+++ b/spec/integration/rails_admin_spec.rb
@@ -31,11 +31,21 @@
     # Note: the [href^="/asset... syntax matches the start of a value. The reason
     # we just do that is to avoid being confused by rails' asset_ids.
     it 'loads stylesheets in header' do
-      is_expected.to have_selector('head link[href^="/assets/rails_admin/rails_admin"][href$=".css"]', visible: false)
+      case RailsAdmin.config.asset_source
+      when :sprockets
+        is_expected.to have_selector('head link[href^="/assets/rails_admin/rails_admin"][href$=".css"]', visible: false)
+      when :webpacker
+        is_expected.to have_no_selector('head link[href~="rails_admin"][href$=".css"]', visible: false)
+      end
     end
 
     it 'loads javascript files in body' do
-      is_expected.to have_selector('head script[src^="/assets/rails_admin/rails_admin"][src$=".js"]', visible: false)
+      case RailsAdmin.config.asset_source
+      when :sprockets
+        is_expected.to have_selector('head script[src^="/assets/rails_admin/rails_admin"][src$=".js"]', visible: false)
+      when :webpacker
+        is_expected.to have_selector('head script[src^="/packs-test/js/rails_admin"][src$=".js"]', visible: false)
+      end
     end
   end
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 05b0619d18..41c13f805a 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -96,6 +96,10 @@ def password_digest(password)
     Capybara.reset! if example.metadata[:js]
   end
 
+  config.before(:all) do
+    Webpacker.instance.compiler.compile if defined?(Webpacker)
+  end
+
   config.before do |example|
     DatabaseCleaner.strategy = (CI_ORM == :mongoid || example.metadata[:js]) ? :deletion : :transaction
 

From b383d357c2d8bc93baa49591d44bf53f4fcf76d7 Mon Sep 17 00:00:00 2001
From: "M.Shibuya" <mit.shibuya@gmail.com>
Date: Sun, 14 Nov 2021 18:47:56 +0900
Subject: [PATCH 5/5] Migrate assets to ESM-based structure

---
 .../javascripts/rails_admin/custom/ui.js      |   1 -
 .../javascripts/rails_admin/jquery-ui.js      |   3 -
 app/assets/javascripts/rails_admin/ra.i18n.js |  28 -
 .../rails_admin/aristo/images/bg_fallback.png | Bin 168 -> 0 bytes
 .../rails_admin/aristo/images/icon_sprite.png | Bin 2660 -> 0 bytes
 .../aristo/images/progress_bar.gif            | Bin 494 -> 0 bytes
 .../aristo/images/slider_handles.png          | Bin 1351 -> 0 bytes
 .../aristo/images/ui-icons_222222_256x240.png | Bin 3699 -> 0 bytes
 .../aristo/images/ui-icons_454545_256x240.png | Bin 3699 -> 0 bytes
 .../rails_admin/custom/mixins.scss            |  11 -
 .../rails_admin/custom/theming.scss           |  13 -
 .../rails_admin/custom/variables.scss         |  15 -
 .../app/javascript/packs/rails_admin.js       |   2 +-
 .../javascript/stylesheets/rails_admin.scss   |   2 +-
 src/rails_admin/base.js                       |  21 +
 .../rails_admin/filter-box.js                 |  59 +-
 .../rails_admin/filtering-multiselect.js      |  23 +-
 .../rails_admin/filtering-select.js           |  24 +-
 src/rails_admin/i18n.js                       |  19 +
 .../images}/aristo/images/bg_fallback.png     | Bin
 .../images}/aristo/images/icon_sprite.png     | Bin
 .../images}/aristo/images/progress_bar.gif    | Bin
 .../images}/aristo/images/slider_handles.png  | Bin
 .../aristo/images/ui-icons_222222_256x240.png | Bin
 .../aristo/images/ui-icons_454545_256x240.png | Bin
 .../rails_admin/images}/bullet_black.png      | Bin
 .../rails_admin/images}/bullet_white.png      | Bin
 .../rails_admin/images}/calendar.png          | Bin
 .../rails_admin/images}/clock.png             | Bin
 .../rails_admin/images}/logo.png              | Bin
 .../rails_admin/images}/magnifier.png         | Bin
 .../images}/multiselect/icon_sprite.png       | Bin
 .../ui-icon-circle-triangle-n-dark.png        | Bin
 .../ui-icon-circle-triangle-n-light.png       | Bin
 .../ui-icon-circle-triangle-s-dark.png        | Bin
 .../ui-icon-circle-triangle-s-light.png       | Bin
 .../rails_admin/nested-form-hooks.js          |   2 +
 .../rails_admin/remote-form.js                |  25 +-
 .../rails_admin/sidescroll.js                 |   2 +
 .../aristo/jquery-ui-1.8.7.custom.scss        |  38 +-
 src/rails_admin/styles/base.scss              |  69 ++
 .../rails_admin/styles}/base/README.txt       |   0
 .../rails_admin/styles}/base/mixins.scss      |   0
 .../rails_admin/styles}/base/theming.scss     |   0
 .../rails_admin/styles}/base/variables.scss   |   0
 .../styles/filtering-multiselect.scss         |  16 +-
 .../rails_admin/styles/sidescroll.scss        |   0
 .../styles}/themes/cerulean/mixins.scss       |   0
 .../styles}/themes/cerulean/theming.scss      |   0
 .../styles}/themes/cerulean/variables.scss    |   0
 .../styles}/themes/default/mixins.scss        |   0
 .../styles}/themes/default/theming.scss       |   0
 .../styles}/themes/default/variables.scss     |   0
 .../rails_admin/styles/widgets.scss           |   0
 .../javascripts => src}/rails_admin/ui.js     |   6 +-
 src/rails_admin/vendor/jquery.pjax.js         | 899 ++++++++++++++++++
 src/rails_admin/vendor/jquery_nested_form.js  | 122 +++
 .../rails_admin/widgets.js                    |   7 +-
 58 files changed, 1230 insertions(+), 177 deletions(-)
 delete mode 100644 app/assets/javascripts/rails_admin/custom/ui.js
 delete mode 100644 app/assets/javascripts/rails_admin/jquery-ui.js
 delete mode 100644 app/assets/javascripts/rails_admin/ra.i18n.js
 delete mode 100644 app/assets/stylesheets/rails_admin/aristo/images/bg_fallback.png
 delete mode 100644 app/assets/stylesheets/rails_admin/aristo/images/icon_sprite.png
 delete mode 100644 app/assets/stylesheets/rails_admin/aristo/images/progress_bar.gif
 delete mode 100644 app/assets/stylesheets/rails_admin/aristo/images/slider_handles.png
 delete mode 100644 app/assets/stylesheets/rails_admin/aristo/images/ui-icons_222222_256x240.png
 delete mode 100644 app/assets/stylesheets/rails_admin/aristo/images/ui-icons_454545_256x240.png
 delete mode 100644 app/assets/stylesheets/rails_admin/custom/mixins.scss
 delete mode 100644 app/assets/stylesheets/rails_admin/custom/theming.scss
 delete mode 100644 app/assets/stylesheets/rails_admin/custom/variables.scss
 create mode 100644 src/rails_admin/base.js
 rename app/assets/javascripts/rails_admin/ra.filter-box.js => src/rails_admin/filter-box.js (86%)
 rename app/assets/javascripts/rails_admin/ra.filtering-multiselect.js => src/rails_admin/filtering-multiselect.js (97%)
 rename app/assets/javascripts/rails_admin/ra.filtering-select.js => src/rails_admin/filtering-select.js (95%)
 create mode 100644 src/rails_admin/i18n.js
 rename {app/assets/images/rails_admin => src/rails_admin/images}/aristo/images/bg_fallback.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/aristo/images/icon_sprite.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/aristo/images/progress_bar.gif (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/aristo/images/slider_handles.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/aristo/images/ui-icons_222222_256x240.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/aristo/images/ui-icons_454545_256x240.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/bullet_black.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/bullet_white.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/calendar.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/clock.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/logo.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/magnifier.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/multiselect/icon_sprite.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/multiselect/ui-icon-circle-triangle-n-dark.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/multiselect/ui-icon-circle-triangle-n-light.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/multiselect/ui-icon-circle-triangle-s-dark.png (100%)
 rename {app/assets/images/rails_admin => src/rails_admin/images}/multiselect/ui-icon-circle-triangle-s-light.png (100%)
 rename app/assets/javascripts/rails_admin/ra.nested-form-hooks.js => src/rails_admin/nested-form-hooks.js (98%)
 rename app/assets/javascripts/rails_admin/ra.remote-form.js => src/rails_admin/remote-form.js (94%)
 rename app/assets/javascripts/rails_admin/ra.sidescroll.js => src/rails_admin/sidescroll.js (96%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/aristo/jquery-ui-1.8.7.custom.scss (94%)
 create mode 100644 src/rails_admin/styles/base.scss
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/base/README.txt (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/base/mixins.scss (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/base/theming.scss (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/base/variables.scss (100%)
 rename app/assets/stylesheets/rails_admin/ra.filtering-multiselect.scss => src/rails_admin/styles/filtering-multiselect.scss (65%)
 rename app/assets/stylesheets/rails_admin/ra.sidescroll.scss => src/rails_admin/styles/sidescroll.scss (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/themes/cerulean/mixins.scss (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/themes/cerulean/theming.scss (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/themes/cerulean/variables.scss (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/themes/default/mixins.scss (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/themes/default/theming.scss (100%)
 rename {app/assets/stylesheets/rails_admin => src/rails_admin/styles}/themes/default/variables.scss (100%)
 rename app/assets/stylesheets/rails_admin/ra.widgets.scss => src/rails_admin/styles/widgets.scss (100%)
 rename {app/assets/javascripts => src}/rails_admin/ui.js (96%)
 create mode 100644 src/rails_admin/vendor/jquery.pjax.js
 create mode 100644 src/rails_admin/vendor/jquery_nested_form.js
 rename app/assets/javascripts/rails_admin/ra.widgets.js => src/rails_admin/widgets.js (99%)

diff --git a/app/assets/javascripts/rails_admin/custom/ui.js b/app/assets/javascripts/rails_admin/custom/ui.js
deleted file mode 100644
index 9d6e5c7cb2..0000000000
--- a/app/assets/javascripts/rails_admin/custom/ui.js
+++ /dev/null
@@ -1 +0,0 @@
-// override this file in your application to add custom behaviour
diff --git a/app/assets/javascripts/rails_admin/jquery-ui.js b/app/assets/javascripts/rails_admin/jquery-ui.js
deleted file mode 100644
index 2f31d7f9d9..0000000000
--- a/app/assets/javascripts/rails_admin/jquery-ui.js
+++ /dev/null
@@ -1,3 +0,0 @@
-//= require 'jquery-ui/effect'
-//= require 'jquery-ui/widgets/sortable'
-//= require 'jquery-ui/widgets/autocomplete'
diff --git a/app/assets/javascripts/rails_admin/ra.i18n.js b/app/assets/javascripts/rails_admin/ra.i18n.js
deleted file mode 100644
index ab42470e4e..0000000000
--- a/app/assets/javascripts/rails_admin/ra.i18n.js
+++ /dev/null
@@ -1,28 +0,0 @@
-(function() {
-  var Locale;
-
-  this.RailsAdmin || (this.RailsAdmin = {});
-
-  this.RailsAdmin.I18n = Locale = (function() {
-    function Locale() {}
-
-    Locale.init = function(locale, translations) {
-      this.locale = locale;
-      this.translations = translations;
-      moment.locale(this.locale);
-      if (typeof this.translations === "string") {
-        this.translations = JSON.parse(this.translations);
-      }
-    };
-
-    Locale.t = function(key) {
-      var humanize;
-      humanize = key.charAt(0).toUpperCase() + key.replace(/_/g, " ").slice(1);
-      return this.translations[key] || humanize;
-    };
-
-    return Locale;
-
-  })();
-
-}).call(this);
diff --git a/app/assets/stylesheets/rails_admin/aristo/images/bg_fallback.png b/app/assets/stylesheets/rails_admin/aristo/images/bg_fallback.png
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diff --git a/app/assets/stylesheets/rails_admin/custom/mixins.scss b/app/assets/stylesheets/rails_admin/custom/mixins.scss
deleted file mode 100644
index 70921182fa..0000000000
--- a/app/assets/stylesheets/rails_admin/custom/mixins.scss
+++ /dev/null
@@ -1,11 +0,0 @@
-/*
-  Customize Sass mixins from Twitter-Bootstrap/RailsAdmin theme or add new ones for your own use.
-  Copy this file to your app/assets/rails_admin/custom/mixins.scss, leave this one untouched
-  Don't require it in your application.rb
-
-  Available mixins to use/override:
-
-  https://github.com/twbs/bootstrap-sass/tree/master/assets/stylesheets/bootstrap/mixins
-  https://github.com/railsadminteam/rails_admin/blob/master/app/assets/stylesheets/rails_admin/base/mixins.scss
-  Plus the ones from your theme.
-*/
diff --git a/app/assets/stylesheets/rails_admin/custom/theming.scss b/app/assets/stylesheets/rails_admin/custom/theming.scss
deleted file mode 100644
index 72ca4ecae0..0000000000
--- a/app/assets/stylesheets/rails_admin/custom/theming.scss
+++ /dev/null
@@ -1,13 +0,0 @@
-/*
-  Customize RailsAdmin theme here.
-  Copy this file to your app/assets/stylesheets/rails_admin/custom/theming.scss, leave this one untouched
-  Don't require it in your application.rb
-
-  Look at the markup in RailsAdmin and go there to get inspiration from:
-
-  http://getbootstrap.com
-
-  Test me: (actual color should be the one defined in variables.scss if you did)
-
-  body { background-color: $link-color; }
-*/
diff --git a/app/assets/stylesheets/rails_admin/custom/variables.scss b/app/assets/stylesheets/rails_admin/custom/variables.scss
deleted file mode 100644
index 4e19047169..0000000000
--- a/app/assets/stylesheets/rails_admin/custom/variables.scss
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
-  Customize Sass variables from Twitter-Bootstrap/RailsAdmin theme or add new ones for your own use.
-  Copy this file to your app/assets/rails_admin/custom/variables.scss, leave this one untouched
-  Don't require it in your application.rb
-
-  Available variables to use/override:
-
-  https://github.com/twbs/bootstrap-sass/blob/master/assets/stylesheets/bootstrap/_variables.scss
-  https://github.com/railsadminteam/rails_admin/blob/master/app/assets/stylesheets/rails_admin/base/variables.scss
-  Plus the ones from your themes.
-
-  Test me: pink links
-
-  $link-color: #F0F;
-*/
diff --git a/spec/dummy_app/app/javascript/packs/rails_admin.js b/spec/dummy_app/app/javascript/packs/rails_admin.js
index dc1a49ecac..470aa39994 100644
--- a/spec/dummy_app/app/javascript/packs/rails_admin.js
+++ b/spec/dummy_app/app/javascript/packs/rails_admin.js
@@ -1,2 +1,2 @@
-import 'rails_admin/src/base'
+import 'rails_admin/src/rails_admin/base'
 import '../stylesheets/rails_admin.scss'
\ No newline at end of file
diff --git a/spec/dummy_app/app/javascript/stylesheets/rails_admin.scss b/spec/dummy_app/app/javascript/stylesheets/rails_admin.scss
index 1fbfafa0ec..185a07bb66 100644
--- a/spec/dummy_app/app/javascript/stylesheets/rails_admin.scss
+++ b/spec/dummy_app/app/javascript/stylesheets/rails_admin.scss
@@ -1 +1 @@
-@import "~rails_admin/src/styles/base.scss";
\ No newline at end of file
+@import "~rails_admin/src/rails_admin/styles/base.scss";
\ No newline at end of file
diff --git a/src/rails_admin/base.js b/src/rails_admin/base.js
new file mode 100644
index 0000000000..32b9eb3353
--- /dev/null
+++ b/src/rails_admin/base.js
@@ -0,0 +1,21 @@
+import Rails from '@rails/ujs'
+import jQuery from 'jquery'
+import moment from 'moment'
+import './vendor/jquery.pjax'
+import './vendor/jquery_nested_form'
+import 'bootstrap'
+import 'moment/min/locales.js'
+import 'eonasdan-bootstrap-datetimepicker'
+
+import './filter-box'
+import './filtering-multiselect'
+import './filtering-select'
+import './nested-form-hooks'
+import './remote-form'
+import './sidescroll'
+import './ui'
+import './widgets'
+
+Rails.start();
+window.$ = window.jQuery = jQuery;
+window.moment = moment;
\ No newline at end of file
diff --git a/app/assets/javascripts/rails_admin/ra.filter-box.js b/src/rails_admin/filter-box.js
similarity index 86%
rename from app/assets/javascripts/rails_admin/ra.filter-box.js
rename to src/rails_admin/filter-box.js
index 8439a218bf..c7584c05e3 100644
--- a/app/assets/javascripts/rails_admin/ra.filter-box.js
+++ b/src/rails_admin/filter-box.js
@@ -1,3 +1,7 @@
+import jQuery from 'jquery';
+import moment from 'moment'
+import I18n from './i18n';
+
 (function($) {
 
   var filters;
@@ -23,13 +27,13 @@
           control = $('<select class="input-sm form-control"></select>')
             .prop('name', value_name)
             .append('<option value="_discard">...</option>')
-            .append($('<option value="true"></option>').prop('selected', field_value == "true").text(RailsAdmin.I18n.t("true")))
-            .append($('<option value="false"></option>').prop('selected', field_value == "false").text(RailsAdmin.I18n.t("false")))
+            .append($('<option value="true"></option>').prop('selected', field_value == "true").text(I18n.t("true")))
+            .append($('<option value="false"></option>').prop('selected', field_value == "false").text(I18n.t("false")))
             if (!required) {
               control.append([
                 '<option disabled="disabled">---------</option>',
-                $('<option value="_present"></option>').prop('selected', field_value == "_present").text(RailsAdmin.I18n.t("is_present")),
-                $('<option value="_blank"></option>').prop('selected', field_value == "_blank").text(RailsAdmin.I18n.t("is_blank"))
+                $('<option value="_present"></option>').prop('selected', field_value == "_present").text(I18n.t("is_present")),
+                $('<option value="_blank"></option>').prop('selected', field_value == "_blank").text(I18n.t("is_blank"))
               ])
             }
           break;
@@ -39,21 +43,21 @@
         case 'time':
           control = control || $('<select class="switch-additional-fieldsets input-sm form-control"></select>')
             .prop('name', operator_name)
-            .append($('<option data-additional-fieldset="default" value="default"></option>').prop('selected', field_operator == "default").text(RailsAdmin.I18n.t(field_type == "time" ? "time" : "date")))
-            .append($('<option data-additional-fieldset="between" value="between"></option>').prop('selected', field_operator == "between").text(RailsAdmin.I18n.t("between_and_")))
+            .append($('<option data-additional-fieldset="default" value="default"></option>').prop('selected', field_operator == "default").text(I18n.t(field_type == "time" ? "time" : "date")))
+            .append($('<option data-additional-fieldset="between" value="between"></option>').prop('selected', field_operator == "between").text(I18n.t("between_and_")))
           if (field_type != 'time') {
             control.append([
-              $('<option value="today"></option>').prop('selected', field_operator == "today").text(RailsAdmin.I18n.t("today")),
-              $('<option value="yesterday"></option>').prop('selected', field_operator == "yesterday").text(RailsAdmin.I18n.t("yesterday")),
-              $('<option value="this_week"></option>').prop('selected', field_operator == "this_week").text(RailsAdmin.I18n.t("this_week")),
-              $('<option value="last_week"></option>').prop('selected', field_operator == "last_week").text(RailsAdmin.I18n.t("last_week")),
+              $('<option value="today"></option>').prop('selected', field_operator == "today").text(I18n.t("today")),
+              $('<option value="yesterday"></option>').prop('selected', field_operator == "yesterday").text(I18n.t("yesterday")),
+              $('<option value="this_week"></option>').prop('selected', field_operator == "this_week").text(I18n.t("this_week")),
+              $('<option value="last_week"></option>').prop('selected', field_operator == "last_week").text(I18n.t("last_week")),
             ])
           }
           if (!required) {
             control.append([
               '<option disabled="disabled">---------</option>',
-              $('<option value="_not_null"></option>').prop('selected', field_operator == "_not_null").text(RailsAdmin.I18n.t("is_present")),
-              $('<option value="_null"></option>').prop('selected', field_operator == "_null").text(RailsAdmin.I18n.t("is_blank"))
+              $('<option value="_not_null"></option>').prop('selected', field_operator == "_not_null").text(I18n.t("is_present")),
+              $('<option value="_null"></option>').prop('selected', field_operator == "_null").text(I18n.t("is_blank"))
             ])
           }
           additional_control =
@@ -83,8 +87,8 @@
             .data('name', value_name)
             .append('<option value="_discard">...</option>')
             .append(required ? [] : [
-              $('<option value="_present"></option>').prop('selected', field_value == "_present").text(RailsAdmin.I18n.t("is_present")),
-              $('<option value="_blank"></option>').prop('selected', field_value == "_blank").text(RailsAdmin.I18n.t("is_blank")),
+              $('<option value="_present"></option>').prop('selected', field_value == "_present").text(I18n.t("is_present")),
+              $('<option value="_blank"></option>').prop('selected', field_value == "_blank").text(I18n.t("is_blank")),
               '<option disabled="disabled">---------</option>'
             ])
             .append(select_options)
@@ -107,15 +111,15 @@
             .prop('value', field_operator)
             .prop('name', operator_name)
             .append('<option value="_discard">...</option>')
-            .append($('<option data-additional-fieldset="additional-fieldset" value="like"></option>').prop('selected', field_operator == "like").text(RailsAdmin.I18n.t("contains")))
-            .append($('<option data-additional-fieldset="additional-fieldset" value="is"></option>').prop('selected', field_operator == "is").text(RailsAdmin.I18n.t("is_exactly")))
-            .append($('<option data-additional-fieldset="additional-fieldset" value="starts_with"></option>').prop('selected', field_operator == "starts_with").text(RailsAdmin.I18n.t("starts_with")))
-            .append($('<option data-additional-fieldset="additional-fieldset" value="ends_with"></option>').prop('selected', field_operator == "ends_with").text(RailsAdmin.I18n.t("ends_with")))
+            .append($('<option data-additional-fieldset="additional-fieldset" value="like"></option>').prop('selected', field_operator == "like").text(I18n.t("contains")))
+            .append($('<option data-additional-fieldset="additional-fieldset" value="is"></option>').prop('selected', field_operator == "is").text(I18n.t("is_exactly")))
+            .append($('<option data-additional-fieldset="additional-fieldset" value="starts_with"></option>').prop('selected', field_operator == "starts_with").text(I18n.t("starts_with")))
+            .append($('<option data-additional-fieldset="additional-fieldset" value="ends_with"></option>').prop('selected', field_operator == "ends_with").text(I18n.t("ends_with")))
           if (!required) {
             control.append([
               '<option disabled="disabled">---------</option>',
-              $('<option value="_present"></option>').prop('selected', field_operator == "_present").text(RailsAdmin.I18n.t("is_present")),
-              $('<option value="_blank"></option>').prop('selected', field_operator == "_blank").text(RailsAdmin.I18n.t("is_blank"))
+              $('<option value="_present"></option>').prop('selected', field_operator == "_present").text(I18n.t("is_present")),
+              $('<option value="_blank"></option>').prop('selected', field_operator == "_blank").text(I18n.t("is_blank"))
             ])
           }
           additional_control = $('<input class="additional-fieldset input-sm form-control" type="text" />')
@@ -128,13 +132,13 @@
         case 'float':
           control = $('<select class="switch-additional-fieldsets input-sm form-control"></select>')
             .prop('name', operator_name)
-            .append($('<option data-additional-fieldset="default" value="default"></option>').prop('selected', field_operator == "default").text(RailsAdmin.I18n.t("number")))
-            .append($('<option data-additional-fieldset="between" value="between"></option>').prop('selected', field_operator == "between").text(RailsAdmin.I18n.t("between_and_")))
+            .append($('<option data-additional-fieldset="default" value="default"></option>').prop('selected', field_operator == "default").text(I18n.t("number")))
+            .append($('<option data-additional-fieldset="between" value="between"></option>').prop('selected', field_operator == "between").text(I18n.t("between_and_")))
           if (!required) {
             control.append([
               '<option disabled="disabled">---------</option>',
-              $('<option value="_not_null"></option>').prop('selected', field_operator == "_not_null").text(RailsAdmin.I18n.t("is_present")),
-              $('<option value="_null"></option>').prop('selected', field_operator == "_null").text(RailsAdmin.I18n.t("is_blank"))
+              $('<option value="_not_null"></option>').prop('selected', field_operator == "_not_null").text(I18n.t("is_present")),
+              $('<option value="_null"></option>').prop('selected', field_operator == "_null").text(I18n.t("is_blank"))
             ])
           }
           additional_control =
@@ -184,7 +188,7 @@
       $content.find('.date, .datetime').each(function() {
         $(this).datetimepicker({
           date: moment($(this).siblings('[type=hidden]').val()),
-          locale: RailsAdmin.I18n.locale,
+          locale: I18n.locale,
           showTodayButton: true,
           format: options['datetimepicker_format']
         });
@@ -216,7 +220,7 @@
 
   $(document).on('click', "#filters_box .delete", function(e) {
     e.preventDefault();
-    form = $(this).parents('form');
+    var form = $(this).parents('form');
     $(this).parents('.filter').remove();
     !$("#filters_box").children().length && $("hr.filters_box:visible").hide('slow');
   });
@@ -232,7 +236,8 @@
 
   $(document).on('change', "#filters_box .switch-additional-fieldsets", function(e) {
     var selected_option = $(this).find('option:selected');
-    if(klass = $(selected_option).data('additional-fieldset')) {
+    var klass = $(selected_option).data('additional-fieldset');
+    if(klass) {
       $(this).siblings('.additional-fieldset:not(.' + klass + ')').hide('slow');
       $(this).siblings('.' + klass).show('slow');
     } else {
diff --git a/app/assets/javascripts/rails_admin/ra.filtering-multiselect.js b/src/rails_admin/filtering-multiselect.js
similarity index 97%
rename from app/assets/javascripts/rails_admin/ra.filtering-multiselect.js
rename to src/rails_admin/filtering-multiselect.js
index 34350740e1..08b3d2cc43 100644
--- a/app/assets/javascripts/rails_admin/ra.filtering-multiselect.js
+++ b/src/rails_admin/filtering-multiselect.js
@@ -1,14 +1,7 @@
-/*
- * RailsAdmin filtering multiselect @VERSION
- *
- * License
- *
- * http://www.railsadmin.org
- *
- * Depends:
- *   jquery.ui.core.js
- *   jquery.ui.widget.js
- */
+import jQuery from 'jquery';
+import 'jquery-ui/ui/widget';
+import I18n from './i18n';
+
 (function($) {
   $.widget("ra.filteringMultiselect", {
     _cache: {},
@@ -120,8 +113,8 @@
 
       this.element.css({display: "none"});
 
-      this.tooManyObjectsPlaceholder = $('<option disabled="disabled" />').text(RailsAdmin.I18n.t("too_many_objects"));
-      this.noObjectsPlaceholder = $('<option disabled="disabled" />').text(RailsAdmin.I18n.t("no_objects"))
+      this.tooManyObjectsPlaceholder = $('<option disabled="disabled" />').text(I18n.t("too_many_objects"));
+      this.noObjectsPlaceholder = $('<option disabled="disabled" />').text(I18n.t("no_objects"))
 
       if (this.options.xhr) {
         this.collection.append(this.tooManyObjectsPlaceholder);
@@ -254,7 +247,7 @@
         if (!this.options.xhr) {
           for (i in this._cache) {
             if (this._cache.hasOwnProperty(i)) {
-              option = this._cache[i];
+              var option = this._cache[i];
               matches.push({id: option.id, label: option.value});
             }
           }
@@ -282,7 +275,7 @@
 
           for (i in this._cache) {
             if (this._cache.hasOwnProperty(i) && query.test(this._cache[i]['value'])) {
-              option = this._cache[i];
+              var option = this._cache[i];
               matches.push({id: option.id, label: option.value});
             }
           }
diff --git a/app/assets/javascripts/rails_admin/ra.filtering-select.js b/src/rails_admin/filtering-select.js
similarity index 95%
rename from app/assets/javascripts/rails_admin/ra.filtering-select.js
rename to src/rails_admin/filtering-select.js
index b292efb51e..b7075d1056 100644
--- a/app/assets/javascripts/rails_admin/ra.filtering-select.js
+++ b/src/rails_admin/filtering-select.js
@@ -1,18 +1,8 @@
-/*
- * RailsAdmin filtering select @VERSION
- *
- * Based on the combobox example from jQuery UI documentation
- * http://jqueryui.com/demos/autocomplete/#combobox
- *
- * License
- *
- * http://www.railsadmin.org
- *
- * Depends:
- *   jquery.ui.core.js
- *   jquery.ui.widget.js
- *   jquery.ui.autocomplete.js
- */
+import jQuery from 'jquery';
+import 'jquery-ui/ui/widget';
+import 'jquery-ui/ui/widgets/autocomplete';
+import I18n from './i18n';
+
 (function($) {
   'use strict';
 
@@ -51,9 +41,9 @@
         this.button = this._buttonField();
       }
       this.clearOption = $('<span style="color: #888"></span>').append(
-          '<i class="fas fa-times"></i> ' + $('<span></span>').text(RailsAdmin.I18n.t("clear")).html()
+          '<i class="fas fa-times"></i> ' + $('<span></span>').text(I18n.t("clear")).html()
       );
-      this.noObjectsPlaceholder = $('<option disabled="disabled" />').text(RailsAdmin.I18n.t("no_objects"));
+      this.noObjectsPlaceholder = $('<option disabled="disabled" />').text(I18n.t("no_objects"));
 
       this._setOptionsSource();
       this._initAutocomplete();
diff --git a/src/rails_admin/i18n.js b/src/rails_admin/i18n.js
new file mode 100644
index 0000000000..5275723b6f
--- /dev/null
+++ b/src/rails_admin/i18n.js
@@ -0,0 +1,19 @@
+import moment from 'moment'
+
+export default {
+  locale: null,
+  translations: null,
+  init(locale, translations) {
+    this.locale = locale;
+    this.translations = translations;
+    moment.locale(this.locale);
+    if (typeof this.translations === "string") {
+      this.translations = JSON.parse(this.translations);
+    }
+  },
+  t(key) {
+    var humanize;
+    humanize = key.charAt(0).toUpperCase() + key.replace(/_/g, " ").slice(1);
+    return this.translations[key] || humanize;
+  }
+};
diff --git a/app/assets/images/rails_admin/aristo/images/bg_fallback.png b/src/rails_admin/images/aristo/images/bg_fallback.png
similarity index 100%
rename from app/assets/images/rails_admin/aristo/images/bg_fallback.png
rename to src/rails_admin/images/aristo/images/bg_fallback.png
diff --git a/app/assets/images/rails_admin/aristo/images/icon_sprite.png b/src/rails_admin/images/aristo/images/icon_sprite.png
similarity index 100%
rename from app/assets/images/rails_admin/aristo/images/icon_sprite.png
rename to src/rails_admin/images/aristo/images/icon_sprite.png
diff --git a/app/assets/images/rails_admin/aristo/images/progress_bar.gif b/src/rails_admin/images/aristo/images/progress_bar.gif
similarity index 100%
rename from app/assets/images/rails_admin/aristo/images/progress_bar.gif
rename to src/rails_admin/images/aristo/images/progress_bar.gif
diff --git a/app/assets/images/rails_admin/aristo/images/slider_handles.png b/src/rails_admin/images/aristo/images/slider_handles.png
similarity index 100%
rename from app/assets/images/rails_admin/aristo/images/slider_handles.png
rename to src/rails_admin/images/aristo/images/slider_handles.png
diff --git a/app/assets/images/rails_admin/aristo/images/ui-icons_222222_256x240.png b/src/rails_admin/images/aristo/images/ui-icons_222222_256x240.png
similarity index 100%
rename from app/assets/images/rails_admin/aristo/images/ui-icons_222222_256x240.png
rename to src/rails_admin/images/aristo/images/ui-icons_222222_256x240.png
diff --git a/app/assets/images/rails_admin/aristo/images/ui-icons_454545_256x240.png b/src/rails_admin/images/aristo/images/ui-icons_454545_256x240.png
similarity index 100%
rename from app/assets/images/rails_admin/aristo/images/ui-icons_454545_256x240.png
rename to src/rails_admin/images/aristo/images/ui-icons_454545_256x240.png
diff --git a/app/assets/images/rails_admin/bullet_black.png b/src/rails_admin/images/bullet_black.png
similarity index 100%
rename from app/assets/images/rails_admin/bullet_black.png
rename to src/rails_admin/images/bullet_black.png
diff --git a/app/assets/images/rails_admin/bullet_white.png b/src/rails_admin/images/bullet_white.png
similarity index 100%
rename from app/assets/images/rails_admin/bullet_white.png
rename to src/rails_admin/images/bullet_white.png
diff --git a/app/assets/images/rails_admin/calendar.png b/src/rails_admin/images/calendar.png
similarity index 100%
rename from app/assets/images/rails_admin/calendar.png
rename to src/rails_admin/images/calendar.png
diff --git a/app/assets/images/rails_admin/clock.png b/src/rails_admin/images/clock.png
similarity index 100%
rename from app/assets/images/rails_admin/clock.png
rename to src/rails_admin/images/clock.png
diff --git a/app/assets/images/rails_admin/logo.png b/src/rails_admin/images/logo.png
similarity index 100%
rename from app/assets/images/rails_admin/logo.png
rename to src/rails_admin/images/logo.png
diff --git a/app/assets/images/rails_admin/magnifier.png b/src/rails_admin/images/magnifier.png
similarity index 100%
rename from app/assets/images/rails_admin/magnifier.png
rename to src/rails_admin/images/magnifier.png
diff --git a/app/assets/images/rails_admin/multiselect/icon_sprite.png b/src/rails_admin/images/multiselect/icon_sprite.png
similarity index 100%
rename from app/assets/images/rails_admin/multiselect/icon_sprite.png
rename to src/rails_admin/images/multiselect/icon_sprite.png
diff --git a/app/assets/images/rails_admin/multiselect/ui-icon-circle-triangle-n-dark.png b/src/rails_admin/images/multiselect/ui-icon-circle-triangle-n-dark.png
similarity index 100%
rename from app/assets/images/rails_admin/multiselect/ui-icon-circle-triangle-n-dark.png
rename to src/rails_admin/images/multiselect/ui-icon-circle-triangle-n-dark.png
diff --git a/app/assets/images/rails_admin/multiselect/ui-icon-circle-triangle-n-light.png b/src/rails_admin/images/multiselect/ui-icon-circle-triangle-n-light.png
similarity index 100%
rename from app/assets/images/rails_admin/multiselect/ui-icon-circle-triangle-n-light.png
rename to src/rails_admin/images/multiselect/ui-icon-circle-triangle-n-light.png
diff --git a/app/assets/images/rails_admin/multiselect/ui-icon-circle-triangle-s-dark.png b/src/rails_admin/images/multiselect/ui-icon-circle-triangle-s-dark.png
similarity index 100%
rename from app/assets/images/rails_admin/multiselect/ui-icon-circle-triangle-s-dark.png
rename to src/rails_admin/images/multiselect/ui-icon-circle-triangle-s-dark.png
diff --git a/app/assets/images/rails_admin/multiselect/ui-icon-circle-triangle-s-light.png b/src/rails_admin/images/multiselect/ui-icon-circle-triangle-s-light.png
similarity index 100%
rename from app/assets/images/rails_admin/multiselect/ui-icon-circle-triangle-s-light.png
rename to src/rails_admin/images/multiselect/ui-icon-circle-triangle-s-light.png
diff --git a/app/assets/javascripts/rails_admin/ra.nested-form-hooks.js b/src/rails_admin/nested-form-hooks.js
similarity index 98%
rename from app/assets/javascripts/rails_admin/ra.nested-form-hooks.js
rename to src/rails_admin/nested-form-hooks.js
index 93398894b3..65cde972bf 100644
--- a/app/assets/javascripts/rails_admin/ra.nested-form-hooks.js
+++ b/src/rails_admin/nested-form-hooks.js
@@ -1,3 +1,5 @@
+import jQuery from 'jquery';
+
 (function($) {
   $(document).ready(function() {
     return window.nestedFormEvents.insertFields = function(content, assoc, link) {
diff --git a/app/assets/javascripts/rails_admin/ra.remote-form.js b/src/rails_admin/remote-form.js
similarity index 94%
rename from app/assets/javascripts/rails_admin/ra.remote-form.js
rename to src/rails_admin/remote-form.js
index cce88d3c15..7423c0ecd2 100644
--- a/app/assets/javascripts/rails_admin/ra.remote-form.js
+++ b/src/rails_admin/remote-form.js
@@ -1,20 +1,12 @@
-/*
- * RailsAdmin remote form @VERSION
- *
- * License
- *
- * http://www.railsadmin.org
- *
- * Depends:
- *   jquery.ui.core.js
- *   jquery.ui.widget.js
- *   jquery.ui.dialog.js
- */
+import Rails from '@rails/ujs'
+import jQuery from 'jquery';
+import 'jquery-ui/ui/widget';
+
 (function($) {
   $.widget("ra.remoteForm", {
 
     _create: function() {
-      var widget = this
+      var widget = this;
       var dom_widget = widget.element;
 
       var edit_url = dom_widget.find('select').first().data('options') && dom_widget.find('select').first().data('options')['edit-url'];
@@ -29,7 +21,8 @@
       });
 
       dom_widget.find('.update').unbind().bind("click", function(e){
-        if(value = dom_widget.find('select').val()) {
+        var value = dom_widget.find('select').val();
+        if(value) {
           widget._bindModalOpening(e, $(this).data('link').replace('__ID__', value))
         } else {
           e.preventDefault();
@@ -39,7 +32,7 @@
 
     _bindModalOpening: function(e, url) {
       e.preventDefault();
-      widget = this;
+      var widget = this;
       if($("#modal").length)
         return false;
 
@@ -80,7 +73,7 @@
       }).html(cancelButtonText);
 
       dialog.find('.save-action').unbind().click(function(){
-        window.Rails.fire(form[0], 'submit');
+        Rails.fire(form[0], 'submit');
         return false;
       }).html(saveButtonText);
 
diff --git a/app/assets/javascripts/rails_admin/ra.sidescroll.js b/src/rails_admin/sidescroll.js
similarity index 96%
rename from app/assets/javascripts/rails_admin/ra.sidescroll.js
rename to src/rails_admin/sidescroll.js
index 7dfe516a8f..26c9d197ec 100644
--- a/app/assets/javascripts/rails_admin/ra.sidescroll.js
+++ b/src/rails_admin/sidescroll.js
@@ -1,3 +1,5 @@
+import jQuery from 'jquery';
+
 (function($) {
   function setFrozenColPositions() {
     var $listForm, frozenColumns;
diff --git a/app/assets/stylesheets/rails_admin/aristo/jquery-ui-1.8.7.custom.scss b/src/rails_admin/styles/aristo/jquery-ui-1.8.7.custom.scss
similarity index 94%
rename from app/assets/stylesheets/rails_admin/aristo/jquery-ui-1.8.7.custom.scss
rename to src/rails_admin/styles/aristo/jquery-ui-1.8.7.custom.scss
index 7c539a0529..0c0cdee580 100644
--- a/app/assets/stylesheets/rails_admin/aristo/jquery-ui-1.8.7.custom.scss
+++ b/src/rails_admin/styles/aristo/jquery-ui-1.8.7.custom.scss
@@ -63,7 +63,7 @@
 .ui-widget-content a { color: #4F4F4F; }
 .ui-widget-header { border: 1px solid #B6B6B6; color: #4F4F4F; font-weight: bold; }
 .ui-widget-header {
-	background: #ededed image-url('rails_admin/aristo/images/bg_fallback.png') 0 0 repeat-x; /* Old browsers */
+	background: #ededed url('~rails_admin/src/rails_admin/images/aristo/images/bg_fallback.png') 0 0 repeat-x; /* Old browsers */
 		background: -moz-linear-gradient(top, #ededed 0%, #c4c4c4 100%); /* FF3.6+ */
 		background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ededed), color-stop(100%,#c4c4c4)); /* Chrome,Safari4+ */
 		background: -webkit-linear-gradient(top, #ededed 0%,#c4c4c4 100%); /* Chrome10+,Safari5.1+ */
@@ -77,7 +77,7 @@
 ----------------------------------*/
 .ui-state-default, .ui-widget-content .ui-state-default, .ui-widget-header .ui-state-default { border: 1px solid #B6B6B6; font-weight: normal; color: #4F4F4F; }
 .ui-state-default, .ui-widget-content .ui-state-default, .ui-widget-header .ui-state-default { 
-	background: #ededed image-url('rails_admin/aristo/images/bg_fallback.png') 0 0 repeat-x; /* Old browsers */
+	background: #ededed url('~rails_admin/src/rails_admin/images/aristo/images/bg_fallback.png') 0 0 repeat-x; /* Old browsers */
 		background: -moz-linear-gradient(top, #ededed 0%, #c4c4c4 100%); /* FF3.6+ */
 		background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ededed), color-stop(100%,#c4c4c4)); /* Chrome,Safari4+ */
 		background: -webkit-linear-gradient(top, #ededed 0%,#c4c4c4 100%); /* Chrome10+,Safari5.1+ */
@@ -94,7 +94,7 @@
 .ui-state-active, .ui-widget-content .ui-state-active, .ui-widget-header .ui-state-active { 
 	outline: none;
 	color: #1c4257; border: 1px solid #7096ab;
-	background: #ededed image-url('rails_admin/aristo/images/bg_fallback.png') 0 -50px repeat-x; /* Old browsers */
+	background: #ededed url('~rails_admin/src/rails_admin/images/aristo/images/bg_fallback.png') 0 -50px repeat-x; /* Old browsers */
 		background: -moz-linear-gradient(top, #b9e0f5 0%, #92bdd6 100%); /* FF3.6+ */
 		background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#b9e0f5), color-stop(100%,#92bdd6)); /* Chrome,Safari4+ */
 		background: -webkit-linear-gradient(top, #b9e0f5 0%,#92bdd6 100%); /* Chrome10+,Safari5.1+ */
@@ -123,14 +123,14 @@
 ----------------------------------*/
 
 /* states and images */
-.ui-icon { width: 16px; height: 16px; background-image: image-url('rails_admin/aristo/images/ui-icons_222222_256x240.png'); }
-.ui-widget-content .ui-icon {background-image: image-url('rails_admin/aristo/images/ui-icons_222222_256x240.png'); }
-.ui-widget-header .ui-icon {background-image: image-url('rails_admin/aristo/images/ui-icons_222222_256x240.png'); }
-.ui-state-default .ui-icon { background-image: image-url('rails_admin/aristo/images/ui-icons_454545_256x240.png'); }
-.ui-state-hover .ui-icon, .ui-state-focus .ui-icon {background-image: image-url('rails_admin/aristo/images/ui-icons_454545_256x240.png'); }
-.ui-state-active .ui-icon {background-image: image-url('rails_admin/aristo/images/ui-icons_454545_256x240.png'); }
-.ui-state-highlight .ui-icon {background-image: image-url('rails_admin/aristo/images/ui-icons_454545_256x240.png'); }
-.ui-state-error .ui-icon, .ui-state-error-text .ui-icon { background: image-url('rails_admin/aristo/images/icon_sprite.png') -16px 0 no-repeat !important; }
+.ui-icon { width: 16px; height: 16px; background-image: url('~rails_admin/src/rails_admin/images/aristo/images/ui-icons_222222_256x240.png'); }
+.ui-widget-content .ui-icon {background-image: url('~rails_admin/src/rails_admin/images/aristo/images/ui-icons_222222_256x240.png'); }
+.ui-widget-header .ui-icon {background-image: url('~rails_admin/src/rails_admin/images/aristo/images/ui-icons_222222_256x240.png'); }
+.ui-state-default .ui-icon { background-image: url('~rails_admin/src/rails_admin/images/aristo/images/ui-icons_454545_256x240.png'); }
+.ui-state-hover .ui-icon, .ui-state-focus .ui-icon {background-image: url('~rails_admin/src/rails_admin/images/aristo/images/ui-icons_454545_256x240.png'); }
+.ui-state-active .ui-icon {background-image: url('~rails_admin/src/rails_admin/images/aristo/images/ui-icons_454545_256x240.png'); }
+.ui-state-highlight .ui-icon {background-image: url('~rails_admin/src/rails_admin/images/aristo/images/ui-icons_454545_256x240.png'); }
+.ui-state-error .ui-icon, .ui-state-error-text .ui-icon { background: url('~rails_admin/src/rails_admin/images/aristo/images/icon_sprite.png') -16px 0 no-repeat !important; }
 .ui-state-highlight .ui-icon, .ui-state-error .ui-icon { margin-top: -1px; }
 
 /* positioning */
@@ -255,7 +255,7 @@
 .ui-icon-video { background-position: -224px -128px; }
 .ui-icon-script { background-position: -240px -128px; }
 .ui-icon-alert { background-position: 0 -144px; }
-.ui-icon-info { background: image-url('rails_admin/aristo/images/icon_sprite.png') 0 0 no-repeat !important; }
+.ui-icon-info { background: url('~rails_admin/src/rails_admin/images/aristo/images/icon_sprite.png') 0 0 no-repeat !important; }
 .ui-icon-notice { background-position: -32px -144px; }
 .ui-icon-help { background-position: -48px -144px; }
 .ui-icon-check { background-position: -64px -144px; }
@@ -475,7 +475,7 @@ button.ui-button-icons-only { width: 3.7em; }
 	outline: none;
 	color: #1c4257;
 	border-color: #7096ab;
-	background: #ededed image-url('rails_admin/aristo/images/bg_fallback.png') 0 -50px repeat-x; /* Old browsers */
+	background: #ededed url('~rails_admin/src/rails_admin/images/aristo/images/bg_fallback.png') 0 -50px repeat-x; /* Old browsers */
 		background: -moz-linear-gradient(top, #b9e0f5 0%, #92bdd6 100%); /* FF3.6+ */
 		background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#b9e0f5), color-stop(100%,#92bdd6)); /* Chrome,Safari4+ */
 		background: -webkit-linear-gradient(top, #b9e0f5 0%,#92bdd6 100%); /* Chrome10+,Safari5.1+ */
@@ -521,7 +521,7 @@ input.ui-button::-moz-focus-inner {
 .ui-buttonset .ui-button { margin-left: 0; margin-right: -.3em; }
 .ui-buttonset .ui-button.ui-state-active { color: #1c4257; border-color: #7096ab; }
 .ui-buttonset .ui-button.ui-state-active {
-	background: #ededed image-url('rails_admin/aristo/images/bg_fallback.png') 0 -50px repeat-x; /* Old browsers */
+	background: #ededed url('~rails_admin/src/rails_admin/images/aristo/images/bg_fallback.png') 0 -50px repeat-x; /* Old browsers */
 		background: -moz-linear-gradient(top, #b9e0f5 0%, #92bdd6 100%); /* FF3.6+ */
 		background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#b9e0f5), color-stop(100%,#92bdd6)); /* Chrome,Safari4+ */
 		background: -webkit-linear-gradient(top, #b9e0f5 0%,#92bdd6 100%); /* Chrome10+,Safari5.1+ */
@@ -552,7 +552,7 @@ button.ui-button::-moz-focus-inner { border: 0; padding: 0; } /* reset extra pad
 .ui-dialog .ui-dialog-titlebar { padding: 0.7em 1em 0.6em 1em; position: relative; border: none; border-bottom: 1px solid #979797; -moz-border-radius: 0; -webkit-border-radius: 0; border-radius: 0;  }
 .ui-dialog .ui-dialog-title { float: left; margin: .1em 16px .2em 0; font-size: 14px; text-shadow: 0 1px 0 rgba(255,255,255,0.5); } 
 .ui-dialog .ui-dialog-titlebar-close { position: absolute; right: .8em; top: 55%; width: 16px; margin: -10px 0 0 0; padding: 0; height: 16px; }
-.ui-dialog .ui-dialog-titlebar-close span { display: block; margin: 1px; background: image-url('rails_admin/aristo/images/icon_sprite.png') 0 -16px no-repeat; }
+.ui-dialog .ui-dialog-titlebar-close span { display: block; margin: 1px; background: url('~rails_admin/src/rails_admin/images/aristo/images/icon_sprite.png') 0 -16px no-repeat; }
 .ui-dialog .ui-dialog-titlebar-close:hover span { background-position: -16px -16px; }
 .ui-dialog .ui-dialog-titlebar-close:hover, .ui-dialog .ui-dialog-titlebar-close:focus { padding: 0; border: 0; }
 .ui-dialog .ui-dialog-content { position: relative; border: 0; padding: .5em 1em; background: none; overflow: auto; zoom: 1; }
@@ -572,7 +572,7 @@ button.ui-button::-moz-focus-inner { border: 0; padding: 0; } /* reset extra pad
  */
 .ui-slider { position: relative; text-align: left; background: #d7d7d7; z-index: 1; }
 .ui-slider { -moz-box-shadow: 0 1px 2px rgba(0,0,0,0.5) inset; -webkit-box-shadow: 0 1px 2px rgba(0,0,0,0.5) inset; box-shadow: 0 1px 2px rgba(0,0,0,0.5) inset; }
-.ui-slider .ui-slider-handle { background: image-url('rails_admin/aristo/images/slider_handles.png') 0px -23px no-repeat; position: absolute; z-index: 2; width: 23px; height: 23px; cursor: default; border: none; outline: none; -moz-box-shadow: none; -webkit-box-shadow: none; box-shadow: none; }
+.ui-slider .ui-slider-handle { background: url('~rails_admin/src/rails_admin/images/aristo/images/slider_handles.png') 0px -23px no-repeat; position: absolute; z-index: 2; width: 23px; height: 23px; cursor: default; border: none; outline: none; -moz-box-shadow: none; -webkit-box-shadow: none; box-shadow: none; }
 .ui-slider  .ui-state-hover, .ui-slider  .ui-state-active { background-position: 0 0; }
 .ui-slider .ui-slider-range { background: #a3cae0; position: absolute; z-index: 1; font-size: .7em; display: block; border: 0; background-position: 0 0; }
 .ui-slider .ui-slider-range { -moz-box-shadow: 0 1px 2px rgba(17,35,45,0.6) inset; -webkit-box-shadow: 0 1px 2px rgba(17,35,45,0.6) inset; box-shadow: 0 1px 2px rgba(17,35,45,0.6) inset; }
@@ -640,7 +640,7 @@ button.ui-button::-moz-focus-inner { border: 0; padding: 0; } /* reset extra pad
 .ui-datepicker .ui-datepicker-next span { background-position: -16px -32px !important; }
 .ui-datepicker .ui-datepicker-prev-hover span { background-position: 0px -48px !important; }
 .ui-datepicker .ui-datepicker-next-hover span { background-position: -16px -48px !important; }
-.ui-datepicker .ui-datepicker-prev span, .ui-datepicker .ui-datepicker-next span { display: block; position: absolute; left: 50%; margin-left: -8px; top: 50%; margin-top: -8px; background: image-url('rails_admin/aristo/images/icon_sprite.png') no-repeat; }
+.ui-datepicker .ui-datepicker-prev span, .ui-datepicker .ui-datepicker-next span { display: block; position: absolute; left: 50%; margin-left: -8px; top: 50%; margin-top: -8px; background: url('~rails_admin/src/rails_admin/images/aristo/images/icon_sprite.png') no-repeat; }
 .ui-datepicker .ui-datepicker-title { margin: 0 2.3em; line-height: 1.8em; text-align: center; font-size: 12px; text-shadow: 0 1px 0 rgba(255,255,255,0.6); }
 .ui-datepicker .ui-datepicker-title select { font-size:1em; margin:1px 0; }
 .ui-datepicker select.ui-datepicker-month-year {width: 100%;}
@@ -701,8 +701,8 @@ button.ui-button::-moz-focus-inner { border: 0; padding: 0; } /* reset extra pad
  *
  * http://docs.jquery.com/UI/Progressbar#theming
  */
-.ui-progressbar { height: 12px; text-align: left; background: #FFF image-url('rails_admin/aristo/images/progress_bar.gif') 0 -14px repeat-x; }
-.ui-progressbar .ui-progressbar-value {margin: -1px; height:100%; background: image-url('rails_admin/aristo/images/progress_bar.gif') 0 0 repeat-x; }
+.ui-progressbar { height: 12px; text-align: left; background: #FFF url('~rails_admin/src/rails_admin/images/aristo/images/progress_bar.gif') 0 -14px repeat-x; }
+.ui-progressbar .ui-progressbar-value {margin: -1px; height:100%; background: url('~rails_admin/src/rails_admin/images/aristo/images/progress_bar.gif') 0 0 repeat-x; }
 
 /* Extra Input Field Styling */
 .ui-form textarea, .ui-form input:not([type="submit"]):not([type="button"]):not([type="checkbox"]):not([type="radio"]):not([type="file"]):not([type="range"]) {
diff --git a/src/rails_admin/styles/base.scss b/src/rails_admin/styles/base.scss
new file mode 100644
index 0000000000..160eac4ef7
--- /dev/null
+++ b/src/rails_admin/styles/base.scss
@@ -0,0 +1,69 @@
+@charset "UTF-8";
+
+/***  Variables  ***/
+
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/_variables";
+@import "base/variables";
+@import "themes/default/variables";
+
+/***  Mixins  ***/
+
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/mixins";
+@import "base/mixins";
+@import "themes/default/mixins";
+
+/***  Libraries  ***/
+
+@import "./aristo/jquery-ui-1.8.7.custom";
+@import "~eonasdan-bootstrap-datetimepicker/src/sass/bootstrap-datetimepicker-build";
+@import "./filtering-multiselect";
+@import "./widgets";
+@import "./sidescroll";
+
+
+/*** Font-awesome ***/
+
+$fa-font-path: '~@fortawesome/fontawesome-free/webfonts';
+@import '~@fortawesome/fontawesome-free/scss/solid';
+@import '~@fortawesome/fontawesome-free/scss/fontawesome';
+
+/***  Bootstrap Theming  ***/
+
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/normalize";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/scaffolding";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/grid";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/type";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/forms";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/tables";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/dropdowns";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/wells";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/component-animations";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/close";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/buttons";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/button-groups";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/input-groups";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/alerts";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/navs";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/navbar";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/breadcrumbs";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/pagination";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/pager";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/modals";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/tooltip";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/popovers";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/thumbnails";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/labels";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/panels";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/badges";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/progress-bars";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/carousel";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/utilities";
+@import "~bootstrap-sass/assets/stylesheets/bootstrap/responsive-utilities";
+
+/***  RailsAdmin Theming  ***/
+
+@import "base/theming";
+@import "themes/default/theming";
+
+
+
diff --git a/app/assets/stylesheets/rails_admin/base/README.txt b/src/rails_admin/styles/base/README.txt
similarity index 100%
rename from app/assets/stylesheets/rails_admin/base/README.txt
rename to src/rails_admin/styles/base/README.txt
diff --git a/app/assets/stylesheets/rails_admin/base/mixins.scss b/src/rails_admin/styles/base/mixins.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/base/mixins.scss
rename to src/rails_admin/styles/base/mixins.scss
diff --git a/app/assets/stylesheets/rails_admin/base/theming.scss b/src/rails_admin/styles/base/theming.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/base/theming.scss
rename to src/rails_admin/styles/base/theming.scss
diff --git a/app/assets/stylesheets/rails_admin/base/variables.scss b/src/rails_admin/styles/base/variables.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/base/variables.scss
rename to src/rails_admin/styles/base/variables.scss
diff --git a/app/assets/stylesheets/rails_admin/ra.filtering-multiselect.scss b/src/rails_admin/styles/filtering-multiselect.scss
similarity index 65%
rename from app/assets/stylesheets/rails_admin/ra.filtering-multiselect.scss
rename to src/rails_admin/styles/filtering-multiselect.scss
index e796076535..2bd8ae1901 100644
--- a/app/assets/stylesheets/rails_admin/ra.filtering-multiselect.scss
+++ b/src/rails_admin/styles/filtering-multiselect.scss
@@ -49,39 +49,39 @@
     vertical-align: top;
     &.ui-icon-circle-triangle-e {
       background-position: -16px -32px !important;
-      background-image: image-url("rails_admin/multiselect/icon_sprite.png");
+      background-image: url("~rails_admin/src/rails_admin/images/multiselect/icon_sprite.png");
     }
     &.ui-icon-circle-triangle-e:hover {
       background-position: -16px -48px !important;
-      background-image: image-url('rails_admin/multiselect/icon_sprite.png');
+      background-image: url("~rails_admin/src/rails_admin/images/multiselect/icon_sprite.png");
     }
     &.ui-icon-circle-triangle-w {
       background-position: 0px -32px !important;
-      background-image: image-url('rails_admin/multiselect/icon_sprite.png');
+      background-image: url("~rails_admin/src/rails_admin/images/multiselect/icon_sprite.png");
     }
     &.ui-icon-circle-triangle-w:hover {
       background-position: 0px -48px !important;
-      background-image: image-url('rails_admin/multiselect/icon_sprite.png');
+      background-image: url("~rails_admin/src/rails_admin/images/multiselect/icon_sprite.png");
     }
     &.ui-icon-circle-triangle-n {
       background-position: 0px 0px !important;
       margin-left: 1px;
-      background-image: image-url('rails_admin/multiselect/ui-icon-circle-triangle-n-light.png');
+      background-image: url("~rails_admin/src/rails_admin/images/multiselect/ui-icon-circle-triangle-n-light.png");
     }
     &.ui-icon-circle-triangle-n:hover {
       background-position: 0px 0px !important;
       margin-left: 1px;
-      background-image: image-url('rails_admin/multiselect/ui-icon-circle-triangle-n-dark.png');
+      background-image: url("~rails_admin/src/rails_admin/images/multiselect/ui-icon-circle-triangle-n-dark.png");
     }
     &.ui-icon-circle-triangle-s {
       background-position: 0px 0px !important;
       margin-left: 1px;
-      background-image: image-url('rails_admin/multiselect/ui-icon-circle-triangle-s-light.png');
+      background-image: url("~rails_admin/src/rails_admin/images/multiselect/ui-icon-circle-triangle-s-light.png");
     }
     &.ui-icon-circle-triangle-s:hover {
       background-position: 0px 0px !important;
       margin-left: 1px;
-      background-image: image-url('rails_admin/multiselect/ui-icon-circle-triangle-s-dark.png');
+      background-image: url("~rails_admin/src/rails_admin/images/multiselect/ui-icon-circle-triangle-s-dark.png");
     }
   }
 }
diff --git a/app/assets/stylesheets/rails_admin/ra.sidescroll.scss b/src/rails_admin/styles/sidescroll.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/ra.sidescroll.scss
rename to src/rails_admin/styles/sidescroll.scss
diff --git a/app/assets/stylesheets/rails_admin/themes/cerulean/mixins.scss b/src/rails_admin/styles/themes/cerulean/mixins.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/themes/cerulean/mixins.scss
rename to src/rails_admin/styles/themes/cerulean/mixins.scss
diff --git a/app/assets/stylesheets/rails_admin/themes/cerulean/theming.scss b/src/rails_admin/styles/themes/cerulean/theming.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/themes/cerulean/theming.scss
rename to src/rails_admin/styles/themes/cerulean/theming.scss
diff --git a/app/assets/stylesheets/rails_admin/themes/cerulean/variables.scss b/src/rails_admin/styles/themes/cerulean/variables.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/themes/cerulean/variables.scss
rename to src/rails_admin/styles/themes/cerulean/variables.scss
diff --git a/app/assets/stylesheets/rails_admin/themes/default/mixins.scss b/src/rails_admin/styles/themes/default/mixins.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/themes/default/mixins.scss
rename to src/rails_admin/styles/themes/default/mixins.scss
diff --git a/app/assets/stylesheets/rails_admin/themes/default/theming.scss b/src/rails_admin/styles/themes/default/theming.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/themes/default/theming.scss
rename to src/rails_admin/styles/themes/default/theming.scss
diff --git a/app/assets/stylesheets/rails_admin/themes/default/variables.scss b/src/rails_admin/styles/themes/default/variables.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/themes/default/variables.scss
rename to src/rails_admin/styles/themes/default/variables.scss
diff --git a/app/assets/stylesheets/rails_admin/ra.widgets.scss b/src/rails_admin/styles/widgets.scss
similarity index 100%
rename from app/assets/stylesheets/rails_admin/ra.widgets.scss
rename to src/rails_admin/styles/widgets.scss
diff --git a/app/assets/javascripts/rails_admin/ui.js b/src/rails_admin/ui.js
similarity index 96%
rename from app/assets/javascripts/rails_admin/ui.js
rename to src/rails_admin/ui.js
index 0bf00e04df..36ea6bb0d1 100644
--- a/app/assets/javascripts/rails_admin/ui.js
+++ b/src/rails_admin/ui.js
@@ -1,3 +1,7 @@
+import jQuery from 'jquery';
+import 'jquery-ui/ui/effect';
+import I18n from './i18n';
+
 (function($) {
   $(document).on("click", "#list input.toggle", function() {
     $("#list [name='bulk_ids[]']").prop("checked", $(this).is(":checked"));
@@ -71,7 +75,7 @@
   });
 
   $(document).ready(function() {
-    RailsAdmin.I18n.init($('html').attr('lang'), $("#admin-js").data('i18nOptions'));
+    I18n.init($('html').attr('lang'), $("#admin-js").data('i18nOptions'));
     $(document).trigger('rails_admin.dom_ready');
   });
 
diff --git a/src/rails_admin/vendor/jquery.pjax.js b/src/rails_admin/vendor/jquery.pjax.js
new file mode 100644
index 0000000000..c174919bf3
--- /dev/null
+++ b/src/rails_admin/vendor/jquery.pjax.js
@@ -0,0 +1,899 @@
+/*!
+ * Copyright 2012, Chris Wanstrath
+ * Released under the MIT License
+ * https://github.com/defunkt/jquery-pjax
+ */
+import jQuery from 'jquery';
+
+(function($){
+
+// When called on a container with a selector, fetches the href with
+// ajax into the container or with the data-pjax attribute on the link
+// itself.
+//
+// Tries to make sure the back button and ctrl+click work the way
+// you'd expect.
+//
+// Exported as $.fn.pjax
+//
+// Accepts a jQuery ajax options object that may include these
+// pjax specific options:
+//
+//
+// container - String selector for the element where to place the response body.
+//      push - Whether to pushState the URL. Defaults to true (of course).
+//   replace - Want to use replaceState instead? That's cool.
+//
+// For convenience the second parameter can be either the container or
+// the options object.
+//
+// Returns the jQuery object
+function fnPjax(selector, container, options) {
+  options = optionsFor(container, options)
+  return this.on('click.pjax', selector, function(event) {
+    var opts = options
+    if (!opts.container) {
+      opts = $.extend({}, options)
+      opts.container = $(this).attr('data-pjax')
+    }
+    handleClick(event, opts)
+  })
+}
+
+// Public: pjax on click handler
+//
+// Exported as $.pjax.click.
+//
+// event   - "click" jQuery.Event
+// options - pjax options
+//
+// Examples
+//
+//   $(document).on('click', 'a', $.pjax.click)
+//   // is the same as
+//   $(document).pjax('a')
+//
+// Returns nothing.
+function handleClick(event, container, options) {
+  options = optionsFor(container, options)
+
+  var link = event.currentTarget
+  var $link = $(link)
+
+  if (link.tagName.toUpperCase() !== 'A')
+    throw "$.fn.pjax or $.pjax.click requires an anchor element"
+
+  // Middle click, cmd click, and ctrl click should open
+  // links in a new tab as normal.
+  if ( event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey )
+    return
+
+  // Ignore cross origin links
+  if ( location.protocol !== link.protocol || location.hostname !== link.hostname )
+    return
+
+  // Ignore case when a hash is being tacked on the current URL
+  if ( link.href.indexOf('#') > -1 && stripHash(link) == stripHash(location) )
+    return
+
+  // Ignore event with default prevented
+  if (event.isDefaultPrevented())
+    return
+
+  var defaults = {
+    url: link.href,
+    container: $link.attr('data-pjax'),
+    target: link
+  }
+
+  var opts = $.extend({}, defaults, options)
+  var clickEvent = $.Event('pjax:click')
+  $link.trigger(clickEvent, [opts])
+
+  if (!clickEvent.isDefaultPrevented()) {
+    pjax(opts)
+    event.preventDefault()
+    $link.trigger('pjax:clicked', [opts])
+  }
+}
+
+// Public: pjax on form submit handler
+//
+// Exported as $.pjax.submit
+//
+// event   - "click" jQuery.Event
+// options - pjax options
+//
+// Examples
+//
+//  $(document).on('submit', 'form', function(event) {
+//    $.pjax.submit(event, '[data-pjax-container]')
+//  })
+//
+// Returns nothing.
+function handleSubmit(event, container, options) {
+  options = optionsFor(container, options)
+
+  var form = event.currentTarget
+  var $form = $(form)
+
+  if (form.tagName.toUpperCase() !== 'FORM')
+    throw "$.pjax.submit requires a form element"
+
+  var defaults = {
+    type: ($form.attr('method') || 'GET').toUpperCase(),
+    url: $form.attr('action'),
+    container: $form.attr('data-pjax'),
+    target: form
+  }
+
+  if (defaults.type !== 'GET' && window.FormData !== undefined) {
+    defaults.data = new FormData(form)
+    defaults.processData = false
+    defaults.contentType = false
+  } else {
+    // Can't handle file uploads, exit
+    if ($form.find(':file').length) {
+      return
+    }
+
+    // Fallback to manually serializing the fields
+    defaults.data = $form.serializeArray()
+  }
+
+  pjax($.extend({}, defaults, options))
+
+  event.preventDefault()
+}
+
+// Loads a URL with ajax, puts the response body inside a container,
+// then pushState()'s the loaded URL.
+//
+// Works just like $.ajax in that it accepts a jQuery ajax
+// settings object (with keys like url, type, data, etc).
+//
+// Accepts these extra keys:
+//
+// container - String selector for where to stick the response body.
+//      push - Whether to pushState the URL. Defaults to true (of course).
+//   replace - Want to use replaceState instead? That's cool.
+//
+// Use it just like $.ajax:
+//
+//   var xhr = $.pjax({ url: this.href, container: '#main' })
+//   console.log( xhr.readyState )
+//
+// Returns whatever $.ajax returns.
+function pjax(options) {
+  options = $.extend(true, {}, $.ajaxSettings, pjax.defaults, options)
+
+  if ($.isFunction(options.url)) {
+    options.url = options.url()
+  }
+
+  var hash = parseURL(options.url).hash
+
+  var containerType = $.type(options.container)
+  if (containerType !== 'string') {
+    throw "expected string value for 'container' option; got " + containerType
+  }
+  var context = options.context = $(options.container)
+  if (!context.length) {
+    throw "the container selector '" + options.container + "' did not match anything"
+  }
+
+  // We want the browser to maintain two separate internal caches: one
+  // for pjax'd partial page loads and one for normal page loads.
+  // Without adding this secret parameter, some browsers will often
+  // confuse the two.
+  if (!options.data) options.data = {}
+  if ($.isArray(options.data)) {
+    options.data.push({name: '_pjax', value: options.container})
+  } else {
+    options.data._pjax = options.container
+  }
+
+  function fire(type, args, props) {
+    if (!props) props = {}
+    props.relatedTarget = options.target
+    var event = $.Event(type, props)
+    context.trigger(event, args)
+    return !event.isDefaultPrevented()
+  }
+
+  var timeoutTimer
+
+  options.beforeSend = function(xhr, settings) {
+    // No timeout for non-GET requests
+    // Its not safe to request the resource again with a fallback method.
+    if (settings.type !== 'GET') {
+      settings.timeout = 0
+    }
+
+    xhr.setRequestHeader('X-PJAX', 'true')
+    xhr.setRequestHeader('X-PJAX-Container', options.container)
+
+    if (!fire('pjax:beforeSend', [xhr, settings]))
+      return false
+
+    if (settings.timeout > 0) {
+      timeoutTimer = setTimeout(function() {
+        if (fire('pjax:timeout', [xhr, options]))
+          xhr.abort('timeout')
+      }, settings.timeout)
+
+      // Clear timeout setting so jquerys internal timeout isn't invoked
+      settings.timeout = 0
+    }
+
+    var url = parseURL(settings.url)
+    if (hash) url.hash = hash
+    options.requestUrl = stripInternalParams(url)
+  }
+
+  options.complete = function(xhr, textStatus) {
+    if (timeoutTimer)
+      clearTimeout(timeoutTimer)
+
+    fire('pjax:complete', [xhr, textStatus, options])
+
+    fire('pjax:end', [xhr, options])
+  }
+
+  options.error = function(xhr, textStatus, errorThrown) {
+    var container = extractContainer("", xhr, options)
+
+    var allowed = fire('pjax:error', [xhr, textStatus, errorThrown, options])
+    if (options.type == 'GET' && textStatus !== 'abort' && allowed) {
+      locationReplace(container.url)
+    }
+  }
+
+  options.success = function(data, status, xhr) {
+    var previousState = pjax.state
+
+    // If $.pjax.defaults.version is a function, invoke it first.
+    // Otherwise it can be a static string.
+    var currentVersion = (typeof $.pjax.defaults.version === 'function') ?
+      $.pjax.defaults.version() :
+      $.pjax.defaults.version
+
+    var latestVersion = xhr.getResponseHeader('X-PJAX-Version')
+
+    var container = extractContainer(data, xhr, options)
+
+    var url = parseURL(container.url)
+    if (hash) {
+      url.hash = hash
+      container.url = url.href
+    }
+
+    // If there is a layout version mismatch, hard load the new url
+    if (currentVersion && latestVersion && currentVersion !== latestVersion) {
+      locationReplace(container.url)
+      return
+    }
+
+    // If the new response is missing a body, hard load the page
+    if (!container.contents) {
+      locationReplace(container.url)
+      return
+    }
+
+    pjax.state = {
+      id: options.id || uniqueId(),
+      url: container.url,
+      title: container.title,
+      container: options.container,
+      fragment: options.fragment,
+      timeout: options.timeout
+    }
+
+    if (options.push || options.replace) {
+      window.history.replaceState(pjax.state, container.title, container.url)
+    }
+
+    // Only blur the focus if the focused element is within the container.
+    var blurFocus = $.contains(options.container, document.activeElement)
+
+    // Clear out any focused controls before inserting new page contents.
+    if (blurFocus) {
+      try {
+        document.activeElement.blur()
+      } catch (e) { }
+    }
+
+    if (container.title) document.title = container.title
+
+    fire('pjax:beforeReplace', [container.contents, options], {
+      state: pjax.state,
+      previousState: previousState
+    })
+    context.html(container.contents)
+
+    // FF bug: Won't autofocus fields that are inserted via JS.
+    // This behavior is incorrect. So if theres no current focus, autofocus
+    // the last field.
+    //
+    // http://www.w3.org/html/wg/drafts/html/master/forms.html
+    var autofocusEl = context.find('input[autofocus], textarea[autofocus]').last()[0]
+    if (autofocusEl && document.activeElement !== autofocusEl) {
+      autofocusEl.focus()
+    }
+
+    executeScriptTags(container.scripts)
+
+    var scrollTo = options.scrollTo
+
+    // Ensure browser scrolls to the element referenced by the URL anchor
+    if (hash) {
+      var name = decodeURIComponent(hash.slice(1))
+      var target = document.getElementById(name) || document.getElementsByName(name)[0]
+      if (target) scrollTo = $(target).offset().top
+    }
+
+    if (typeof scrollTo == 'number') $(window).scrollTop(scrollTo)
+
+    fire('pjax:success', [data, status, xhr, options])
+  }
+
+
+  // Initialize pjax.state for the initial page load. Assume we're
+  // using the container and options of the link we're loading for the
+  // back button to the initial page. This ensures good back button
+  // behavior.
+  if (!pjax.state) {
+    pjax.state = {
+      id: uniqueId(),
+      url: window.location.href,
+      title: document.title,
+      container: options.container,
+      fragment: options.fragment,
+      timeout: options.timeout
+    }
+    window.history.replaceState(pjax.state, document.title)
+  }
+
+  // Cancel the current request if we're already pjaxing
+  abortXHR(pjax.xhr)
+
+  pjax.options = options
+  var xhr = pjax.xhr = $.ajax(options)
+
+  if (xhr.readyState > 0) {
+    if (options.push && !options.replace) {
+      // Cache current container element before replacing it
+      cachePush(pjax.state.id, [options.container, cloneContents(context)])
+
+      window.history.pushState(null, "", options.requestUrl)
+    }
+
+    fire('pjax:start', [xhr, options])
+    fire('pjax:send', [xhr, options])
+  }
+
+  return pjax.xhr
+}
+
+// Public: Reload current page with pjax.
+//
+// Returns whatever $.pjax returns.
+function pjaxReload(container, options) {
+  var defaults = {
+    url: window.location.href,
+    push: false,
+    replace: true,
+    scrollTo: false
+  }
+
+  return pjax($.extend(defaults, optionsFor(container, options)))
+}
+
+// Internal: Hard replace current state with url.
+//
+// Work for around WebKit
+//   https://bugs.webkit.org/show_bug.cgi?id=93506
+//
+// Returns nothing.
+function locationReplace(url) {
+  window.history.replaceState(null, "", pjax.state.url)
+  window.location.replace(url)
+}
+
+
+var initialPop = true
+var initialURL = window.location.href
+var initialState = window.history.state
+
+// Initialize $.pjax.state if possible
+// Happens when reloading a page and coming forward from a different
+// session history.
+if (initialState && initialState.container) {
+  pjax.state = initialState
+}
+
+// Non-webkit browsers don't fire an initial popstate event
+if ('state' in window.history) {
+  initialPop = false
+}
+
+// popstate handler takes care of the back and forward buttons
+//
+// You probably shouldn't use pjax on pages with other pushState
+// stuff yet.
+function onPjaxPopstate(event) {
+
+  // Hitting back or forward should override any pending PJAX request.
+  if (!initialPop) {
+    abortXHR(pjax.xhr)
+  }
+
+  var previousState = pjax.state
+  var state = event.state
+  var direction
+
+  if (state && state.container) {
+    // When coming forward from a separate history session, will get an
+    // initial pop with a state we are already at. Skip reloading the current
+    // page.
+    if (initialPop && initialURL == state.url) return
+
+    if (previousState) {
+      // If popping back to the same state, just skip.
+      // Could be clicking back from hashchange rather than a pushState.
+      if (previousState.id === state.id) return
+
+      // Since state IDs always increase, we can deduce the navigation direction
+      direction = previousState.id < state.id ? 'forward' : 'back'
+    }
+
+    var cache = cacheMapping[state.id] || []
+    var containerSelector = cache[0] || state.container
+    var container = $(containerSelector), contents = cache[1]
+
+    if (container.length) {
+      if (previousState) {
+        // Cache current container before replacement and inform the
+        // cache which direction the history shifted.
+        cachePop(direction, previousState.id, [containerSelector, cloneContents(container)])
+      }
+
+      var popstateEvent = $.Event('pjax:popstate', {
+        state: state,
+        direction: direction
+      })
+      container.trigger(popstateEvent)
+
+      var options = {
+        id: state.id,
+        url: state.url,
+        container: containerSelector,
+        push: false,
+        fragment: state.fragment,
+        timeout: state.timeout,
+        scrollTo: false
+      }
+
+      if (contents) {
+        container.trigger('pjax:start', [null, options])
+
+        pjax.state = state
+        if (state.title) document.title = state.title
+        var beforeReplaceEvent = $.Event('pjax:beforeReplace', {
+          state: state,
+          previousState: previousState
+        })
+        container.trigger(beforeReplaceEvent, [contents, options])
+        container.html(contents)
+
+        container.trigger('pjax:end', [null, options])
+      } else {
+        pjax(options)
+      }
+
+      // Force reflow/relayout before the browser tries to restore the
+      // scroll position.
+      container[0].offsetHeight
+    } else {
+      locationReplace(location.href)
+    }
+  }
+  initialPop = false
+}
+
+// Fallback version of main pjax function for browsers that don't
+// support pushState.
+//
+// Returns nothing since it retriggers a hard form submission.
+function fallbackPjax(options) {
+  var url = $.isFunction(options.url) ? options.url() : options.url,
+      method = options.type ? options.type.toUpperCase() : 'GET'
+
+  var form = $('<form>', {
+    method: method === 'GET' ? 'GET' : 'POST',
+    action: url,
+    style: 'display:none'
+  })
+
+  if (method !== 'GET' && method !== 'POST') {
+    form.append($('<input>', {
+      type: 'hidden',
+      name: '_method',
+      value: method.toLowerCase()
+    }))
+  }
+
+  var data = options.data
+  if (typeof data === 'string') {
+    $.each(data.split('&'), function(index, value) {
+      var pair = value.split('=')
+      form.append($('<input>', {type: 'hidden', name: pair[0], value: pair[1]}))
+    })
+  } else if ($.isArray(data)) {
+    $.each(data, function(index, value) {
+      form.append($('<input>', {type: 'hidden', name: value.name, value: value.value}))
+    })
+  } else if (typeof data === 'object') {
+    var key
+    for (key in data)
+      form.append($('<input>', {type: 'hidden', name: key, value: data[key]}))
+  }
+
+  $(document.body).append(form)
+  form.submit()
+}
+
+// Internal: Abort an XmlHttpRequest if it hasn't been completed,
+// also removing its event handlers.
+function abortXHR(xhr) {
+  if ( xhr && xhr.readyState < 4) {
+    xhr.onreadystatechange = $.noop
+    xhr.abort()
+  }
+}
+
+// Internal: Generate unique id for state object.
+//
+// Use a timestamp instead of a counter since ids should still be
+// unique across page loads.
+//
+// Returns Number.
+function uniqueId() {
+  return (new Date).getTime()
+}
+
+function cloneContents(container) {
+  var cloned = container.clone()
+  // Unmark script tags as already being eval'd so they can get executed again
+  // when restored from cache. HAXX: Uses jQuery internal method.
+  cloned.find('script').each(function(){
+    if (!this.src) jQuery._data(this, 'globalEval', false)
+  })
+  return cloned.contents()
+}
+
+// Internal: Strip internal query params from parsed URL.
+//
+// Returns sanitized url.href String.
+function stripInternalParams(url) {
+  url.search = url.search.replace(/([?&])(_pjax|_)=[^&]*/g, '')
+  return url.href.replace(/\?($|#)/, '$1')
+}
+
+// Internal: Parse URL components and returns a Locationish object.
+//
+// url - String URL
+//
+// Returns HTMLAnchorElement that acts like Location.
+function parseURL(url) {
+  var a = document.createElement('a')
+  a.href = url
+  return a
+}
+
+// Internal: Return the `href` component of given URL object with the hash
+// portion removed.
+//
+// location - Location or HTMLAnchorElement
+//
+// Returns String
+function stripHash(location) {
+  return location.href.replace(/#.*/, '')
+}
+
+// Internal: Build options Object for arguments.
+//
+// For convenience the first parameter can be either the container or
+// the options object.
+//
+// Examples
+//
+//   optionsFor('#container')
+//   // => {container: '#container'}
+//
+//   optionsFor('#container', {push: true})
+//   // => {container: '#container', push: true}
+//
+//   optionsFor({container: '#container', push: true})
+//   // => {container: '#container', push: true}
+//
+// Returns options Object.
+function optionsFor(container, options) {
+  if (container && options) {
+    options = $.extend({}, options)
+    options.container = container
+    return options
+  } else if ($.isPlainObject(container)) {
+    return container
+  } else {
+    return {container: container}
+  }
+}
+
+// Internal: Filter and find all elements matching the selector.
+//
+// Where $.fn.find only matches descendants, findAll will test all the
+// top level elements in the jQuery object as well.
+//
+// elems    - jQuery object of Elements
+// selector - String selector to match
+//
+// Returns a jQuery object.
+function findAll(elems, selector) {
+  return elems.filter(selector).add(elems.find(selector))
+}
+
+function parseHTML(html) {
+  return $.parseHTML(html, document, true)
+}
+
+// Internal: Extracts container and metadata from response.
+//
+// 1. Extracts X-PJAX-URL header if set
+// 2. Extracts inline <title> tags
+// 3. Builds response Element and extracts fragment if set
+//
+// data    - String response data
+// xhr     - XHR response
+// options - pjax options Object
+//
+// Returns an Object with url, title, and contents keys.
+function extractContainer(data, xhr, options) {
+  var obj = {}, fullDocument = /<html/i.test(data)
+
+  // Prefer X-PJAX-URL header if it was set, otherwise fallback to
+  // using the original requested url.
+  var serverUrl = xhr.getResponseHeader('X-PJAX-URL')
+  obj.url = serverUrl ? stripInternalParams(parseURL(serverUrl)) : options.requestUrl
+
+  // Attempt to parse response html into elements
+  if (fullDocument) {
+    var $head = $(parseHTML(data.match(/<head[^>]*>([\s\S.]*)<\/head>/i)[0]))
+    var $body = $(parseHTML(data.match(/<body[^>]*>([\s\S.]*)<\/body>/i)[0]))
+  } else {
+    var $head = $body = $(parseHTML(data))
+  }
+
+  // If response data is empty, return fast
+  if ($body.length === 0)
+    return obj
+
+  // If there's a <title> tag in the header, use it as
+  // the page's title.
+  obj.title = findAll($head, 'title').last().text()
+
+  if (options.fragment) {
+    // If they specified a fragment, look for it in the response
+    // and pull it out.
+    if (options.fragment === 'body') {
+      var $fragment = $body
+    } else {
+      var $fragment = findAll($body, options.fragment).first()
+    }
+
+    if ($fragment.length) {
+      obj.contents = options.fragment === 'body' ? $fragment : $fragment.contents()
+
+      // If there's no title, look for data-title and title attributes
+      // on the fragment
+      if (!obj.title)
+        obj.title = $fragment.attr('title') || $fragment.data('title')
+    }
+
+  } else if (!fullDocument) {
+    obj.contents = $body
+  }
+
+  // Clean up any <title> tags
+  if (obj.contents) {
+    // Remove any parent title elements
+    obj.contents = obj.contents.not(function() { return $(this).is('title') })
+
+    // Then scrub any titles from their descendants
+    obj.contents.find('title').remove()
+
+    // Gather all script[src] elements
+    obj.scripts = findAll(obj.contents, 'script[src]').remove()
+    obj.contents = obj.contents.not(obj.scripts)
+  }
+
+  // Trim any whitespace off the title
+  if (obj.title) obj.title = $.trim(obj.title)
+
+  return obj
+}
+
+// Load an execute scripts using standard script request.
+//
+// Avoids jQuery's traditional $.getScript which does a XHR request and
+// globalEval.
+//
+// scripts - jQuery object of script Elements
+//
+// Returns nothing.
+function executeScriptTags(scripts) {
+  if (!scripts) return
+
+  var existingScripts = $('script[src]')
+
+  scripts.each(function() {
+    var src = this.src
+    var matchedScripts = existingScripts.filter(function() {
+      return this.src === src
+    })
+    if (matchedScripts.length) return
+
+    var script = document.createElement('script')
+    var type = $(this).attr('type')
+    if (type) script.type = type
+    script.src = $(this).attr('src')
+    document.head.appendChild(script)
+  })
+}
+
+// Internal: History DOM caching class.
+var cacheMapping      = {}
+var cacheForwardStack = []
+var cacheBackStack    = []
+
+// Push previous state id and container contents into the history
+// cache. Should be called in conjunction with `pushState` to save the
+// previous container contents.
+//
+// id    - State ID Number
+// value - DOM Element to cache
+//
+// Returns nothing.
+function cachePush(id, value) {
+  cacheMapping[id] = value
+  cacheBackStack.push(id)
+
+  // Remove all entries in forward history stack after pushing a new page.
+  trimCacheStack(cacheForwardStack, 0)
+
+  // Trim back history stack to max cache length.
+  trimCacheStack(cacheBackStack, pjax.defaults.maxCacheLength)
+}
+
+// Shifts cache from directional history cache. Should be
+// called on `popstate` with the previous state id and container
+// contents.
+//
+// direction - "forward" or "back" String
+// id        - State ID Number
+// value     - DOM Element to cache
+//
+// Returns nothing.
+function cachePop(direction, id, value) {
+  var pushStack, popStack
+  cacheMapping[id] = value
+
+  if (direction === 'forward') {
+    pushStack = cacheBackStack
+    popStack  = cacheForwardStack
+  } else {
+    pushStack = cacheForwardStack
+    popStack  = cacheBackStack
+  }
+
+  pushStack.push(id)
+  if (id = popStack.pop())
+    delete cacheMapping[id]
+
+  // Trim whichever stack we just pushed to to max cache length.
+  trimCacheStack(pushStack, pjax.defaults.maxCacheLength)
+}
+
+// Trim a cache stack (either cacheBackStack or cacheForwardStack) to be no
+// longer than the specified length, deleting cached DOM elements as necessary.
+//
+// stack  - Array of state IDs
+// length - Maximum length to trim to
+//
+// Returns nothing.
+function trimCacheStack(stack, length) {
+  while (stack.length > length)
+    delete cacheMapping[stack.shift()]
+}
+
+// Public: Find version identifier for the initial page load.
+//
+// Returns String version or undefined.
+function findVersion() {
+  return $('meta').filter(function() {
+    var name = $(this).attr('http-equiv')
+    return name && name.toUpperCase() === 'X-PJAX-VERSION'
+  }).attr('content')
+}
+
+// Install pjax functions on $.pjax to enable pushState behavior.
+//
+// Does nothing if already enabled.
+//
+// Examples
+//
+//     $.pjax.enable()
+//
+// Returns nothing.
+function enable() {
+  $.fn.pjax = fnPjax
+  $.pjax = pjax
+  $.pjax.enable = $.noop
+  $.pjax.disable = disable
+  $.pjax.click = handleClick
+  $.pjax.submit = handleSubmit
+  $.pjax.reload = pjaxReload
+  $.pjax.defaults = {
+    timeout: 650,
+    push: true,
+    replace: false,
+    type: 'GET',
+    dataType: 'html',
+    scrollTo: 0,
+    maxCacheLength: 20,
+    version: findVersion
+  }
+  $(window).on('popstate.pjax', onPjaxPopstate)
+}
+
+// Disable pushState behavior.
+//
+// This is the case when a browser doesn't support pushState. It is
+// sometimes useful to disable pushState for debugging on a modern
+// browser.
+//
+// Examples
+//
+//     $.pjax.disable()
+//
+// Returns nothing.
+function disable() {
+  $.fn.pjax = function() { return this }
+  $.pjax = fallbackPjax
+  $.pjax.enable = enable
+  $.pjax.disable = $.noop
+  $.pjax.click = $.noop
+  $.pjax.submit = $.noop
+  $.pjax.reload = function() { window.location.reload() }
+
+  $(window).off('popstate.pjax', onPjaxPopstate)
+}
+
+
+// Add the state property to jQuery's event object so we can use it in
+// $(window).bind('popstate')
+if ($.event.props && $.inArray('state', $.event.props) < 0) {
+  $.event.props.push('state')
+} else if (!('state' in $.Event.prototype)) {
+  $.event.addProp('state')
+}
+
+// Is pjax supported by this browser?
+$.support.pjax =
+  window.history && window.history.pushState && window.history.replaceState &&
+  // pushState isn't reliable on iOS until 5.
+  !navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]\D|WebApps\/.+CFNetwork)/)
+
+$.support.pjax ? enable() : disable()
+
+})(jQuery)
diff --git a/src/rails_admin/vendor/jquery_nested_form.js b/src/rails_admin/vendor/jquery_nested_form.js
new file mode 100644
index 0000000000..2c9aef8bf9
--- /dev/null
+++ b/src/rails_admin/vendor/jquery_nested_form.js
@@ -0,0 +1,122 @@
+import jQuery from 'jquery';
+
+(function($) {
+  window.NestedFormEvents = function() {
+    this.addFields = $.proxy(this.addFields, this);
+    this.removeFields = $.proxy(this.removeFields, this);
+  };
+
+  NestedFormEvents.prototype = {
+    addFields: function(e) {
+      // Setup
+      var link      = e.currentTarget;
+      var assoc     = $(link).data('association');                // Name of child
+      var blueprint = $('#' + $(link).data('blueprint-id'));
+      var content   = blueprint.data('blueprint');                // Fields template
+
+      // Make the context correct by replacing <parents> with the generated ID
+      // of each of the parent objects
+      var context = ($(link).closest('.fields').closestChild('input, textarea, select').eq(0).attr('name') || '').replace(/\[[a-z_]+\]$/, '');
+
+      // If the parent has no inputs we need to strip off the last pair
+      var current = content.match(new RegExp('\\[([a-z_]+)\\]\\[new_' + assoc + '\\]'));
+      if (current) {
+        context = context.replace(new RegExp('\\[' + current[1] + '\\]\\[(new_)?\\d+\\]$'), '');
+      }
+
+      // context will be something like this for a brand new form:
+      // project[tasks_attributes][1255929127459][assignments_attributes][1255929128105]
+      // or for an edit form:
+      // project[tasks_attributes][0][assignments_attributes][1]
+      if (context) {
+        var parentNames = context.match(/[a-z_]+_attributes(?=\]\[(new_)?\d+\])/g) || [];
+        var parentIds   = context.match(/[0-9]+/g) || [];
+
+        for(var i = 0; i < parentNames.length; i++) {
+          if(parentIds[i]) {
+            content = content.replace(
+              new RegExp('(_' + parentNames[i] + ')_.+?_', 'g'),
+              '$1_' + parentIds[i] + '_');
+
+            content = content.replace(
+              new RegExp('(\\[' + parentNames[i] + '\\])\\[.+?\\]', 'g'),
+              '$1[' + parentIds[i] + ']');
+          }
+        }
+      }
+
+      // Make a unique ID for the new child
+      var regexp  = new RegExp('new_' + assoc, 'g');
+      var new_id  = this.newId();
+      content     = $.trim(content.replace(regexp, new_id));
+
+      var field = this.insertFields(content, assoc, link);
+      // bubble up event upto document (through form)
+      field
+        .trigger({ type: 'nested:fieldAdded', field: field })
+        .trigger({ type: 'nested:fieldAdded:' + assoc, field: field });
+      return false;
+    },
+    newId: function() {
+      return new Date().getTime();
+    },
+    insertFields: function(content, assoc, link) {
+      var target = $(link).data('target');
+      if (target) {
+        return $(content).appendTo($(target));
+      } else {
+        return $(content).insertBefore(link);
+      }
+    },
+    removeFields: function(e) {
+      var $link = $(e.currentTarget),
+          assoc = $link.data('association'); // Name of child to be removed
+      
+      var hiddenField = $link.prev('input[type=hidden]');
+      hiddenField.val('1');
+      
+      var field = $link.closest('.fields');
+      field.hide();
+      
+      field
+        .trigger({ type: 'nested:fieldRemoved', field: field })
+        .trigger({ type: 'nested:fieldRemoved:' + assoc, field: field });
+      return false;
+    }
+  };
+
+  window.nestedFormEvents = new NestedFormEvents();
+  $(document)
+    .delegate('form a.add_nested_fields',    'click', nestedFormEvents.addFields)
+    .delegate('form a.remove_nested_fields', 'click', nestedFormEvents.removeFields);
+})(jQuery);
+
+// http://plugins.jquery.com/project/closestChild
+/*
+ * Copyright 2011, Tobias Lindig
+ *
+ * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
+ * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
+ *
+ */
+(function($) {
+        $.fn.closestChild = function(selector) {
+                // breadth first search for the first matched node
+                if (selector && selector != '') {
+                        var queue = [];
+                        queue.push(this);
+                        while(queue.length > 0) {
+                                var node = queue.shift();
+                                var children = node.children();
+                                for(var i = 0; i < children.length; ++i) {
+                                        var child = $(children[i]);
+                                        if (child.is(selector)) {
+                                                return child; //well, we found one
+                                        }
+                                        queue.push(child);
+                                }
+                        }
+                }
+                return $();//nothing found
+        };
+})(jQuery);
diff --git a/app/assets/javascripts/rails_admin/ra.widgets.js b/src/rails_admin/widgets.js
similarity index 99%
rename from app/assets/javascripts/rails_admin/ra.widgets.js
rename to src/rails_admin/widgets.js
index 642c0baed6..02d77c7654 100644
--- a/app/assets/javascripts/rails_admin/ra.widgets.js
+++ b/src/rails_admin/widgets.js
@@ -1,3 +1,8 @@
+import jQuery from 'jquery';
+import 'jquery-ui/ui/widgets/sortable'
+import moment from 'moment'
+import I18n from './i18n';
+
 (function($) {
   $(document).on('rails_admin.dom_ready', function(e, content) {
     var $editors, array, config_options, goBootstrapWysihtml5s, goCkeditors, goCodeMirrors, goFroalaWysiwygs, goSimpleMDEs, options;
@@ -19,7 +24,7 @@
         options = $(this).data('options');
         $.extend(options, {
           date: moment($(this).siblings('[type=hidden]').val()),
-          locale: RailsAdmin.I18n.locale
+          locale: I18n.locale
         });
         $(this).datetimepicker(options);
         $(this).on('dp.change', function(e) {