If 'ion-back-button' is an Angular component, then verify that it is part of this module

[Harikag]

Thanks for your information.
I have some doubts regarding get method.

Can you help me this please

Http get not working ionic 4

in app.module: import { HttpClientModule } from ‘@angular/common/http’; imports: [BrowserModule ,HttpModule,HttpClientModule,IonicModule.forRoot(),ChartsModule, AppRoutingModule], in service: import { HttpClient } from ‘@angular/common/http’; contructor(public http: HttpClient,) login(url){ this.http.get ( url ) .subscribe (data => { this.data = data; }, err=> { ); } in the data returns 200, ok but in the body is empty