Aborting a Backbone Collection fetch request

collection_fetch_abort.coffee

# Collection.fetch() returns a Xhr that you can store in a variable.
# The request can be aborted if the Xhr readystate is 1,2 or 3.
#
# Note: If readystate == 3 the request has already been sent and the
#       server will continue to process it, the response will be ignored.
 
class App.Routers.Posts extends Backbone.Router
  routes:
    '': 'index'
    ':id': 'show'
    
  initialize: ->
    @collection = new App.Collections.Posts()
    @view       = new App.Views.PostsIndex(collection: @collection, el: '#posts')
  
  index: ->
    # Money
    @fetchXhr.abort() if @fetchXhr?.readyState in [1..3]
 
    @fetchXhr = @collection.fetch
      reset: true
 
  show: (id) ->
    # ...