How to 'wait' for two observables in RxJS

Question

In my app i have something like:

this._personService.getName(id)
      .concat(this._documentService.getDocument())
      .subscribe((response) => {
              


        

Answer 1

For me this sample was best solution.

const source = Observable.interval(500);
const example = source.sample(Observable.interval(2000));
const subscribe = example.subscribe(val => console.log('sample', val));

So.. only when second (example) emit - you will see last emited value of first (source).

In my task, I wait form validation and other DOM event.