Guide: Services

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Angular services are substitutable objects that are wired together using dependency injection (DI)- You can use services to organize and share code across your app-

Angular services are:

• Lazily instantiated – Angular only instantiates a service when an application component depends on it-
• Singletons – Each component dependent on a service gets a reference to the single instance generated by the service factory-

Angular offers several useful services (like $http), but for most applications you'll also want to 登录查看完整内容