Facbook comments directive for AngularJS

fbComments.directive.js

angular.module('directives.fbComments', [])
       .directive('fbComments', fbComments);

fbComments.$injects = ['$timeout'];

function fbComments($timeout) {
    function createHTML(href, numposts) {
        return '<div class="fb-comments" ' +
               'data-href="' + href + '" ' +
               'data-numposts="' + numposts + '">' +
           '</div>';
    }

    return {
        restrict: 'A',
        scope: {},
        link: function postLink(scope, elem, attrs) {
            elem.html(createHTML(attrs.href, attrs.numposts));

            $timeout(function () {
                if (typeof FB != 'undefined') {
                    FB.XFBML.parse(elem[0]);
                }
            });
        }
    }
}