Introducing the Angular HTTP client

The built-in HTTP client of the Angular framework is a separate Angular library that resides in the @angular/common npm package under the http namespace. The Angular CLI installs this package by default when creating a new Angular project. To start using it, we need to import HttpClientModule in the main application module app.module.ts:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpClientModule } from '@angular/common/http';
import { AppComponent } from './app.component';
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    HttpClientModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

The HttpClientModule class provides various Angular services we can use to handle asynchronous HTTP communication. The most basic is the...