gistfile1.rb

# Using coffeescript with erb as a :js response
# works in development doesn't seem to work in production

# app/controller/posts.rb
class Posts < ApplicationController
  respond_to :html, :js

  def new
    @post = Posts.new
  end
end


# app/views/posts/new.js.coffee
$('#some-div').append '<% = j render partial: "post" %>'