asyncInitialization with Backbone.Marionette

application.coffee

class Application extends Marionette.Application

  constructor: (options) ->
    super options
    @_asyncInitCallbacks = []

  addAsyncInitializer: (initializer) ->
    @_asyncInitCallbacks.push initializer

  start: (options) ->
    @triggerMethod "initialize:before", options
    @_initCallbacks.run options, @
    asyncCallbackPromises = _.map @_asyncInitCallbacks, (callback) -> callback()
    $.when(asyncCallbackPromises...).done =>
      @triggerMethod "initialize:after", options
      @triggerMethod "start", options


App = window.App = new Application()

loadResources = ->
  dfd = $.Deferred()
  _.delay dfd.resolve, 3000
  dfd.promise()

App.addAsyncInitializer loadResources
App.start()