How to use service in angular.js controller? - angularjs

Question

I have created the service but i am not getting how use this service in my controller.
(function(){
'use.strict';
angular
.module('app.core')
.factory('shareBtwnCtrlr', shareBtwnCtrlrService);
/** #ngInject */
function shareBtwnCtrlrService() {
shareBtwnCtrlr = function($scope, $rootScope){
$scope.value = $rootScope.test;
}
return shareBtwnCtrlr;
}
})();
In the above code $rootScope.test is coming from one controller and now i have to use this $scope.value in another controller using this service. The another controller is like below
(function (){
'use strict';
angular.module('app.product')
.controller('ProductController', ProductController);
/** #ngInject */
//ProductController.$inject = ['$http', '$location', '$scope'];
function ProductController($http, $location, $rootScope, $scope, $localStorage, $interval, $timeout,$mdDialog, $document, shareBtwnCtrlr){
var vm = this;
}
})();

Answer 1

You got two modules, so dependency injector can't inject your service from app.core to app.product.
Try to create new module
var app = angular.module('app', ['app.core','app.product']);
and then
angular.module('app').factory('shareBtwnCtrlr', shareBtwnCtrlrService);

Answer 2

Only a service in the same module can be injected to the controllers and directives of the module.
The new module should be added to the app to expand its capabilities.
angular.module('app.core')
.factory('shareBtwnCtrlrService', function() {
var shareBtwnCtrlrService = this;
shareBtwnCtrlrService.value = function(){
//do something
}
return shareBtwnCtrlrService;
}
};
angular.module('app.product')
.factory('productService', function() {
var productService = this;
productService.value = function(){
//do something
}
return productService;
}
};
Now to use the service in the core and product modules, we create app module including both in it
angular.module('app', ['app.product', 'app.core'])
.controller('ProductController', ['shareBtwnCtrlrService', 'productService', function (shareBtwnCtrlrService, productService) {
// ...do something
}]);