I have a Rails 4 application with
<%= javascript_include_tag \"modernizr\", \"data-turbolinks-track\" => true %>
in the head. In deve
Be sure to precompile your assets in production by running this command:
RAILS_ENV=production bundle exec rake assets:precompile
The Rails Guide on the asset pipeline can give you more details: http://guides.rubyonrails.org/asset_pipeline.html#precompiling-assets