The new HttpClient was introduced in July 2017 as an improved version of the former Angular HTTP client API, also known as @angular/http, or simply HTTP. Instead of replacing the old version in the @angular/http package, the Angular development team has put the new classes in a separate package--@angular/common/http. They chose to do that to preserve the backward-compatibility with the existing code bases and also to ensure a slow, yet steady migration to the new API.
Those who used the old Angular HTTP service class at least once will most likely remember its main limitations:
- JSON was not enabled by default, forcing the developers to explicitly set it within the request Headers--and JSON.parse/stringify ...
