javascript - $scope.$apply() in angular working but throwing error -

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i put isolated example in jsbin: http://jsbin.com/deqerelita/1/

scenario idea simple. click button, controller adds model, view gets updated accordingly hidden input type="file". after view updated, controller clicks last file input added.

problem when controller clicks file input before running $scope.$apply() nothing happens till second click, presumably because angular has not registered new input yet. when run $scope.$apply() console throws errors click input.

here html: 

  <div ng-controller="filebuttons">     <input type="button" ng-click="handleimage.add()" value="add file button"/>      <div class="imageuploadpreviewcontainer">         <div class="imageuploadpreview hide" data-ng-repeat="file in files" file-index="{{$index}}">             <input type="file" class="hide"/>         </div>     </div>   </div>  </div></div>

here angular js:

 var myapp = angular.module('myapp', []); myapp.controller('filebuttons', ['$scope', '$log',     function($scope, $log){         $scope.files = [];         $scope.handleimage = {             add: function(){               $scope.files.push({                 state : 'started'               });               $log.log('added');               $scope.$apply();                angular.element('.imageuploadpreviewcontainer .imageuploadpreview:last input[type=file]').trigger('click')             }         }     } ]);

completely new angular pardon noooobish design flaws

i use $timeout

var myapp = angular.module('myapp', []); myapp.controller('filebuttons', ['$scope', '$log','$timeout', function($scope, $log, $timeout) {     $scope.files = [];     $scope.handleimage = {       add: function()       {         $scope.files.push({state : 'started'});         $log.log('added');         $timeout(function()         {           angular.element('.imageuploadpreviewcontainer .imageuploadpreview:last input[type=file]').trigger('click')         },0);       }     };   } ]);

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