Editing Angular (section)

===Services===
Services provide specific functionality not directly related to views. Service providers can be injected into components as dependencies, making your code modular, reusable, and efficient. Modules, components and services are classes that use '''[[TypeScript#Decorators|decorators]]'''. These decorators mark their type and provide metadata that tells Angular how to use them. 

Services only live inside the scope of their providers, so in the scope of a module or a single component. They are instantiated when injected for the first time and keept alive as long as the provider exists. As services are normal classes, angulars lifecycle hooks do not apply to them.