Making several AJAX requests with map operator

http-map.ts

import { map } from 'rxjs/operators';
import { ajax } from 'rxjs/ajax';
import { of } from 'rxjs';

const pokemonId$ = of(1, 5, 6);

function getPokemonName(id: number) {
  return ajax.getJSON(`https://pokeapi.co/api/v2/pokemon/${id}`);
}

pokemonId$
  .pipe(
    map(id => getPokemonName(id)),
  )
  .subscribe(console.log);
// Output: Observable {}, Observable {}, Observable {}