FB code to add SDK converted to CoffeeScript

fb-add-sdk.coffee

window.fbAsyncInit = ->
  FB.init
    appId: "YOUR_APP_ID" # App ID
    channelUrl: "//WWW.YOUR_DOMAIN.COM/channel.html" # Channel File
    status: true # check login status
    cookie: true # enable cookies to allow the server to access the session
    xfbml: true # parse XFBML

  FB.Event.subscribe "auth.statusChange", handleStatusChange


# Load the SDK Asynchronously
((d) ->
  js = undefined
  id = "facebook-jssdk"
  ref = d.getElementsByTagName("script")[0]
  return  if d.getElementById(id)
  js = d.createElement("script")
  js.id = id
  js.async = true
  js.src = "//connect.facebook.net/en_US/all.js"
  ref.parentNode.insertBefore js, ref
) document