Angular 2 Cookbook

Converting a Promise into an Observable

Observables and Promises serve different purposes and are good at different things, but in a specific part of an application, you will almost certainly want to be dealing with a single denomination. This means converting observables into promises and vice versa. Thanks to RxJS, this is quite simple.

Tip

For more on RxJS Observables, refer to Chapter 5 , ReactiveX Observables, which covers them in depth.

Note

The code, links, and a live example of this are available at http://ngcookbook.herokuapp.com/5244/ .

How to do it...

There is a good deal of parity between Promise and Observable. There are discrete success and error cases, and the concept of successful completion only corresponds to the success case.

RxJS ...