HttpClient, Http (deprecated in current Angular versions), and Axios are Angular modules that call REST APIs.

 

// data.service.ts
import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable({
   providedIn: 'root'
})
export class DataService {
constructor(private http: HttpClient) {}

getSettings) {
   return this.http.get('https://api.com/api/settings/getSettings');
}
}