Creating factory Services

The factory method provides the ability to implement functionality into a service. It can also be dependent on other service providers, allowing you to build up compartmentalized code. The factory method uses the following syntax, where name is the service name and factoryProvider is a provider function that builds the factory service:

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factory(name, factoryProvider)

You can inject the factory method with other services, and it returns the service object with the appropriate functionality. The functionality can be a complex JavaScript service, a value, or a simple function. For example, the following code implements a factory service that returns a function that adds two numbers:

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var app = angular.module('myApp', []);
app.constant('myConst', 10);
app.factory('multiplier', ['myConst', function (myConst) {
  return function(value) { return value+myConst; };
}]);