What is HttpClient, and what are its benefits?

HttpClient is an Angular module for using the HTTP protocol to communicate with a backend service. In most frontend apps, the fetch API is used to send requests. The fetch API, on the other hand, makes use of promises. Promises are helpful, but they don’t have the same depth of functionality as observables. This is why, in Angular, we utilize HttpClient since it delivers data as an observable, which we can subscribe to, unsubscribe from, and perform other actions on using operators. Promises can be turned into observables, and observables may be produced from promises.