Http Angular service lacks a provider

@Injectable()
export class MyService {
    constructor(private http: Http, @Inject('name') @Optional() public name?: string) {            
}

When setting up my appModule, I attempted to define a provider for MyService service.

MyService,
imports: [ // importing Angular modules
HttpModule,    
....,
    [
      { provide: 'username', useValue: 'default' }         
    ],

const injector = ReflectiveInjector.resolveAndCreate(
      [MyService,
        {
          provide: 'name', useValue: 'abc'
        }
      ]);

Unfortunately, an error occurred:

ERROR Error: No provider for Http! (MyService -> Http)

Answer №1

To properly configure your app, make sure to follow these steps:

import { HttpClientModule } from '@angular/common/http';
import { HttpModule } from '@angular/http';

After importing the necessary modules, add them to your list of imports:

imports: [
    ...
    HttpClientModule,
    HttpModule
  ],

Don't forget to include your service in the providers array:

providers: [
    ...
    MyService
    ...
  ],

Next, ensure that you import HttpClient and other necessary components in your service file:

import { HttpClient, HttpErrorResponse, HttpHeaders } from '@angular/common/http';

Then update your constructor to use HttpClient instead of Http:

constructor(private http: HttpClient)

These steps should assist you in setting up your app correctly.

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