Most front-end applications use either XMLHttpRequest interface or the fetch() API to communicate with backend services over HTTP protocol. For the same purpose, Angular provides a simplified client HTTP API known as HttpClient. This is based on top of the XMLHttpRequest interface. This HttpClient is available in the @angular/common/http package, which you can import into your root module as follows:

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

Following are some of the crucial advantages of HttpClient:

• HttpClient contains testability features.
• It provides typed request and response objects.
• It can intercept requests and responses.
• It supports Observalbe APIs.
• HttpClient also supports streamlined error handling.