Simple backend class example.

gistfile1.coffee

class Backend
  getData: ->
    request = $.ajax
      type: "GET"
      dataType: "JSON"
      url: '/foo'
    request.pipe (response) ->
      DomainObject.fromJSON(response)

# And then in initializer code:
@backend.getData()
  .done (domainObject) =>
     # Do something. For example: set state of the component you've rendered before.