angular-textarea-autoresize.js

(function () {
    angular.module('MyModule', [])
        .directive(
            'autoResizeDirective',
            [
                '$parse',
                function ($parse) {
                    return {
                        restrict: 'AC',
                        scope: true,
                        link: function ($scope, $elem, $attr) {
                            var getHeight = function () {
                                return $elem[0].scrollHeight;
                            };

                            var oldHeight = getHeight();
                            var adjust = function () {
                                var newHeight = getHeight();
                                $elem.css('height', newHeight + 'px');
                                if (oldHeight != newHeight) {
                                    oldHeight = newHeight;
                                    adjust();
                                }
                            };

                            $scope.$watch($attr.ngModel, function () {
                                adjust();
                            });
                        }
                    };
                }
            ]);
})();