StackOverflow_25055589: object-observe-synchronous-callback

Illustration of answer to http://stackoverflow.com/questions/25055589/object-observe-synchronous-callback.

by ExpertSystem

HTML

<script src="http://code.angularjs.org/1.2.21/angular.min.js"></script>
<div ng-controller="mainCtrl">
    Output: {{p.someOtherProperty}}
</div>

<!-- -=-=-=-=- -=-=-=-=- -=-=-=-=- -=-=-=-=- -=-=-=-=- -->
<!-- Page Footer -->
<small class="footer" ng-controller="footerCtrl">
    <b>Angular v{{version.full}}</b> ({{version.codeName}})
    <span class="right">
        &copy; <a ng-href="{{authorUrl}}" target="_blank">ExpertSystem</a>
    </span>
</small>

CSS

/* -=-=-=-=- -=-=-=-=- -=-=-=-=- -=-=-=-=- -=-=-=-=- */
/* Page Footer */
body { padding-bottom: 22px; }
.footer { background-color: White; border-top: 1px solid rgba(100, 100, 100, 0.33); bottom: 0; display: block; font-size: 0.75em; height: 20px; left: 0; margin: 0 10px; overflow: auto; padding: 5px 0; position: fixed; right: 0; }
.right { float: right; }

JavaScript

var app = angular.module('myApp', []);
app.controller('mainCtrl', function ($scope, Person) {
    $scope.p = new Person('Alice');
    $scope.p.watch();
    $scope.p.name = 'Bob';
});

app.factory('Person', function ($rootScope) {
    return function Person(name) {
        var self = this;

        self.name = name;
        self.someOtherProperty = null;

        this.watch = function () {
            Object.observe(self, function (changes) {
                $rootScope.$apply(function () {
                    changes.forEach(function (change) {
                        console.log(change);
                        if (change.name === 'name') {
                            self.someOtherProperty = self.name;
                        }
                    });
                });
            });
        };
    };
});

/* -=-=-=-=- -=-=-=-=- -=-=-=-=- -=-=-=-=- -=-=-=-=- */
/* Page Footer */
app.controller('footerCtrl', function ($scope) {
    $scope.authorUrl = '//stackoverflow.com/users/2341938/expertsystem';
    $scope.version   = angular.version;
});