RxJS 5 wrapper for Promise.all method.

rx5xmlhttpwrapperall.js

class ApiRequest {
  
  all(requests) {
    return Rx.Observable.forkJoin(...requests);
  }
  
  ...
}
  
var apiRequest = new ApiRequest();

apiRequest
  .all([apiRequest.observableRequest('http://pokeapi.co/api/v2/pokemon/1'), apiRequest.observableRequest('http://pokeapi.co/api/v2/pokemon/2'), apiRequest.observableRequest('http://pokeapi.co/api/v2/pokemon/3')])
  .subscribe(responses => console.log(responses));