Service in angular

Service: Service is a class, witch is collection of properties and methods, witch contain re-usable programming logic , witch mainly contains Data source interaction (API Call) and business logic.

• Services can be accessible in components, directives or pipes.
• Services can be accessible from other Services.

Steps to create Service:

• Create Service class
• Create a class with one or more properties and methods that contains business logic and data access logic.
• Make ready the service for dependency injection:
• Add @Injectable() decorator above the service class.
• Provide the service globally/locally: we have 4 below methods
• Add the provideIn:"root" option in @Injectable() decorator.
• Add provides:[service] in AppModule's metadata.
• Add provides:[service] in any other module's metadata.
• Add provides:[service] in any other component's metadata.
• Inject the service into actual component:
• Add @Inject(service) private referenceVariale : Service in any  component's constructor.