RxJs Observables nested subscriptions?

Question

Whats the way to simplify something like the following code example? I can\'t find the right operator.. could anyone give a short example?

this.returnsObserv         


        

Answer 1

Previously answered for RxJS 5, I ended up on this page whilst using 6.

In the case you're on 6 as well (and I think you should be by now) you can use flatmap as an operator within pipe.

Modified the example code of @user3743222:

this.returnsObservable1(...)
  .pipe(
    flatMap(success => this.returnsObservable2(...)),
    flatMap(success => this.returnsObservable3(...))
  )
  .subscribe(success => {(...)});