Update jquery scrollbar after ng-repeat render

Scrollbar don't see height of div because scrollbar update apply before child elements render. How i can watch what elements is compiled?

I used watch to see when object adding to array. It works fine, but tinyscrollab_update sees empty div, because ng-repeat no compiled yet.

$scope.$watch('comments', function(){
    angular.element('#comment-list').tinyscrollbar_update('relative');
});

I write it in directive.

app.directive('commentsDirective', function(){
   $scope.$watch('comments', function(){
      angular.element('#comment-list').tinyscrollbar_update('relative');
   });
})