Yes, like turbolinks it's a default dependency in the Gemfile. But e.g. jquery-rails https://github.com/rails/jquery-ujs https://github.com/rails/jquery-ujs is

Yes, like turbolinks it's a default dependency in the Gemfile. But e.g. jquery-rails https://github.com/rails/jquery-ujs https://github.com/rails/jquery-ujs is written in JS not CS, so I can use all the jQuery integration in Rails without using CS. With turbolinks being written in CS if I want to use the full power of Rails+JS I need to add CS to my project.