rxjs flatmap missing

Question

I try to chain multiple rx.js observables and pass the data. Flatmap should be the fitting operator but with an import of

import { Observable } from 'rxjs/Observable'; 

it is not found:

Error TS2339: Property 'flatmap' does not exist on type 'Observable<Coordinates>' 

Version 5.0.0-beta.6 of rx.js is used.

public getCurrentLocationAddress():Observable<String> {     return Observable.fromPromise(Geolocation.getCurrentPosition())       .map(location => location.coords)       .flatmap(coordinates => {         console.log(coordinates);         return this.http.request(this.geoCodingServer + "/json?latlng=" + coordinates.latitude + "," + coordinates.longitude)           .map((res: Response) => {                        let data = res.json();                        return data.results[0].formatted_address;               });       });   } 

Answer 1

It turns out the answer is quite simple:

the operator is called mergeMap in this version of rxjs

EDIT:

Furthermore, you might have to use import 'rxjs/add/operator/mergeMap'.

Answer 2

In my case I needed to import the augmentation for mergeMap:

import 'rxjs/add/operator/mergeMap'; 

As flatMap is an alias of mergeMap, importing the module above will enable you to use flatMap.