[static service] How to use static variables by adding static services w/ variables #ionic

howTo.md

In mySerivce.ts make sure it is providedIn 'root'

@injectable({
  provideIn: 'root'
)}
export class myService { ... }  

In app.module.ts add the service to Providers

@NgModule({
  ...
  providers: [
    StatusBar,
    <ServiceName>
  	...
  ],