在Angularjs控制器中观察一个对象

var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
    $scope.form = {
        name: 'my name',
        age: '25'
    }

    $scope.$watch('form', function(newVal, oldVal){
        console.log(newVal);
    },true);
    
    $scope.foo= function(){
    $scope.form.name = 'abc';
    $scope.form.age = $scope.form.age++;
    }
    $scope.foo();
    
    $scope.bar= function(){
    $scope.form.name = 'xyz';
    $scope.form.age = $scope.form.age++;
    }
    $scope.bar();
});var app = angular.module('myApp', [