CODEWITHSUNDEEP
angular
koolunix
koolunix

Reputation: 1995

Angular 6 service only library

I would like to have an Angular 6 library that only publishes a singleton service.

Here is a simple Angular library that only contains this service:

test54-library/src/lib/test54-library.service.ts

import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class Test54LibraryService {
  constructor() { }
  testCall() {
    console.log('this is a testcall');
  }
}

test54-library/src/public_api.ts

export * from './lib/test54-library.service';

Do I have to have a module like this in this library that references this service in a providers entry? Why is a module needed in this usecase?

@NgModule()
export class Test54Module {
  static forRoot():ModuleWithProviders {
    return {
      ngModuleTest54Module,
      providers: [
        Test54LibraryService
      ]
    }
  }
}

Upvotes: 1

Views: 1906

Answers (1)

Eeshwar Ankathi
Eeshwar Ankathi

Reputation: 266

You don't need to provide the service again. the providedIn: 'root' does the work for you.

Please refer: singleton-services for more information.

Upvotes: 1

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