angular__angular/aio/content/guide/understanding-communicating-with-http.md

Understanding communicating with backend services using HTTP

Most front-end applications need to communicate with a server over the HTTP protocol, to download or upload data and access other back-end services. Angular provides a client HTTP API for Angular applications, the HttpClient service class in @angular/common/http.

Prerequisites

Before working with the HttpClientModule, you should have a basic understanding of the following:

• TypeScript programming
• Usage of the HTTP protocol
• Angular application-design fundamentals, as described in Angular Concepts
• Observable techniques and operators. See the Observables guide.

HTTP client service features

The HTTP client service offers the following major features.

• The ability to request typed response objects
• Streamlined error handling
• Testability features
• Request and response interception

What's next

• Setup for server communication

@reviewed 2023-03-14