Is it possible to render a js file with Rails and minify the output?
def action_name
  js_code = render_to_string 'your_js_code_view'
  js_code.gsub!(/rn|r|n/, '') #and/or any other minimization you like
  render 'the_view_wich_will_show_the_minimized_js_code'
end

respond_to do |format|
  format.js { self.response_body = minify(render_to_string) }
end