Submodule 22.3: Angular HTTP Client - Practice

You need to import the HttpClientModule in app.module.ts by adding the following to the file:

...
import { HttpClientModule } from '@angular/common/http';
...
@NgModule({
 ... 
 imports: [
 ... , 
 HttpClientModule
 ],
...

Having imported HttpClientModule into the AppModule, you can inject the HttpClient into an application class as shown in the "Updating the Dish service" page.