How to respond with coffee script

Question

How can I respond with coffee flavoured JS?

def new
  respond_with { |format| format.js }
end

# new.js.coffee.erb
$('#blah_' + @blah.id).something ->
  etc...

This breaks, though: missing template. I need to choose between coffee or erb, but I want both.

Answer 1

If you suffix your template with .js.coffee you'll get both ERB and CoffeeScript capabilities.

This is highly confusing because most templates you define which pre-processors you want your templates to run through by adding extensions. See this issue on GitHub: https://github.com/rails/coffee-rails/issues/36

Answer 2

Your template should be named .js.coffee.

Answer 3

No, you need to choose between coffee or js, since coffee compiles to js.