AngularJS Directive: Scroll

scroll.coffee

app.directive 'scroll', ($window) ->
  restrict: 'A'
  ($scope, $element, $attr) ->
    win = angular.element($window)
    
    $scope.$watch ->
      scrollX: window.scrollX
      scrollY: window.scrollY
    , (newVal, oldVal) ->
      $scope.scrollX = newVal.scrollY
      $scope.scrollY = newVal.scrollY
    , true
    
    win.bind 'scroll', ->
      $scope.$apply()