echo.service.ts

import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import { Injectable } from '@angular/core';
@Injectable({
   providedIn: 'root'
})
export class EchoService {
   constructor(private httpClient: HttpClient) {}
   public makeCall(): Observable<any> {
      return this.httpClient.get<any>('https://jsonplaceholder.typicode.com/posts/1');
   }
}