gparlakov · February 11, 2018 11:08
diff --git a/1. The service.ts b/1. The service.ts
 @Injectable()
 export class TimeService implements OnDestroy {
  // ... some useful stuff
  ngOnDestroy(): void {    
    // ... some clean up logic
  }
 }
diff --git a/2. The Module providing the service.ts b/2. The Module providing the service.ts
 @NgModule({
  ...
  providers: [TimeService],
  ...
 })
 export class AppModule { }
diff --git a/3. The component.ts b/3. The component.ts
 @Component({/*... omitted for brevity*/})
 export class TimeWidgetComponent {

  constructor(timeService: TimeService) {
    // useful stuff using timeService
  }
 }
	@Injectable()
	export class TimeService implements OnDestroy {
	// ... some useful stuff
	ngOnDestroy(): void {
	// ... some clean up logic
	}
	}
	@Component({/... omitted for brevity/})
	export class TimeWidgetComponent {

	constructor(timeService: TimeService) {
	// useful stuff using timeService
	}
	}