Question

What is the reason for No provider for HTTP exception?

Answer 1

This exception is due to missing HttpClientModule in your module. You just need to import in module as below,

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

@NgModule({
  imports: [
    BrowserModule,
    HttpClientModule,
  ],
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }