Angularjs: 'controller as syntax' and $watch

How to subscribe on property change when using controller as syntax? controller('TestCtrl', function ($scope) { this.name = 'Max'; this.changeName = function () { this.name = new Date(); } // not working $scope.$watch("name",function(value){ console.log(value) }); }); <div ng-controller="TestCtrl as test"> <input type="text" ng-model="test.name" /> <a ng-click="test.changeName()" href="#">Change N