Angular of the function passed to the service.

 Angular Services ImplementationAngular services are created by registering them with the module they are going to operate in.Below is the following three way to create services.ServiceFactory Provider syntax:var app = angular.module(“app”, );AngularJS services using FactoryThe easy common way to create a service is by using the Modules Factory API.  factory method used to create an object add properties to it and return the same object. next can be injected into the components like controller service, filter or directive.Syntax :app.factory(‘factoryName’,function(){         return factoryObj;      });Create angular services :This is instantiated with the new keyword. provided with an instance of the function passed to the service. This object instance becomes the service object that AngularJS registers and is injected to the required components.Syntax : app.service(‘serviceName’,function(){ });AngularJS services example using ProviderProviders are the only service you can pass into your .config() function. Providers are used when you want to provide module-wide configuration for your service object before making it available. It returns value by using $get() function.Syntax  :syntax for creating a providerapp.provider(‘providerName’,function(){ });syntax for configuring a providerapp.config(function(providerNameProvider){});AngularJS Services ExampleEX:    AngularJS Services        

   

       

Message From Service: {{serviceMsg}}

       

Message From Factory: {{factoryMsg}}

       

Message From Provider:{{providerMsg}}

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 Ex: Main.jsvar app = angular.module(‘mainApp’, );define a service named myServiceapp.service(‘myService’, function () {    this.message = ”;    this.setMessage = function (newMessage) {        this.message = newMessage;        return this.message;    };});define factory  named ‘myFactory’app.factory(‘myFactory’, function () {    var obj = {};    obj.message = ”;    obj.setMessage = function (newMessage) {        obj.message = newMessage;    };    return obj;});Defining a provider ‘configurable’app.provider(‘configurable’, function () {    var returnMessage = ”;    this.setMessage = function (newMessage) {        returnMessage = newMessage;    };    this.$get = function () {        return {            message: returnMessage        };    };});configuring providerapp.config(function (configurableProvider) {    configurableProvider.setMessage(“Hello, i am from Provider”);});defining controllerapp.controller(‘myController’, function ($scope, myService, myFactory, configurable) {    $scope.serviceMsg = myService.setMessage(“Hello, i am  from Service”);    myFactory.setMessage(“Hello, I’m From Factory “);    $scope.factoryMsg = myFactory.message;    $scope.providerMsg= configurable.message;}); Services Example code explanation:The created new module named mainApp using angular.module(‘mainApp’, ); Defined service using service method in the module and you can see how we added properties and function to the service object for getting the message. We used this keyword to add the properties to the service object. service using a factory method in the module and returned the service object. service using provider method in the module and used $get() function to get the message.build the provider using the config() function in the module to set the message.Defined a controller and all the services are injected into the controller.Set the factory and service messages.Permanently controller sends all messages to the view using a $scope.

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