AngularJS : How to watch service variables?

Question

I have a service, say:

factory(\'aService\', [\'$rootScope\', \'$resource\', function ($rootScope, $resource) {
  var service = {
    foo: []
  };

  return          


        

Answer 1

You can insert the service in $rootScope and watch:

myApp.run(function($rootScope, aService){
    $rootScope.aService = aService;
    $rootScope.$watch('aService', function(){
        alert('Watch');
    }, true);
});

In your controller:

myApp.controller('main', function($scope){
    $scope.aService.foo = 'change';
});

Other option is to use a external library like: https://github.com/melanke/Watch.JS

Works with: IE 9+, FF 4+, SF 5+, WebKit, CH 7+, OP 12+, BESEN, Node.JS , Rhino 1.7+

You can observe the changes of one, many or all object attributes.

Example:

var ex3 = {
    attr1: 0,
    attr2: "initial value of attr2",
    attr3: ["a", 3, null]
};   
watch(ex3, function(){
    alert("some attribute of ex3 changes!");
});
ex3.attr3.push("new value");​