Create a clean application.js file for new design

app/assets/javascripts/new_design/application.js

@@ -0,0 +1,18 @@
+// This is a manifest file that'll be compiled into application.js, which will include all the files
+// listed below.
+//
+// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
+// or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path.
+//
+// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
+// compiled file.
+//
+// Read Sprockets README (https://github.com/sstephenson/sprockets#sprockets-directives) for details
+// about supported directives.
+//
+//= require jquery
+//= require jquery_ujs
+//= require turbolinks
+//= require highcharts
+//= require chartkick
+//= require_tree .

app/views/layouts/new_application.html.haml

@@ -37,7 +37,7 @@
     = render partial: "layouts/mailjet_newsletter"
     = render partial: "layouts/crisp"
 
-    = javascript_include_tag "application", "data-turbolinks-track": true
+    = javascript_include_tag "new_design/application", "data-turbolinks-track": true
     = yield :charts_js
     - if Rails.env == "test"
       %script{ type: "text/javascript" }

config/initializers/assets.rb

@@ -8,4 +8,4 @@ Rails.application.config.assets.version = '1.0'
 
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-Rails.application.config.assets.precompile += %w(print.css new_design/new_application.css)
+Rails.application.config.assets.precompile += %w(print.css new_design/new_application.css new_design/application.js)