Contador ms < 1000

import { Observable, of, range, from } from 'rxjs'; import { delay, mergeMap, timeInterval, concatMap } from 'rxjs/operators'; contador:number = 0; // Esto funcionó range(1,100).pipe( mergeMap(i => of(i).pipe(delay((i+1)*100))), timeInterval() ).subscribe(i => { this.contador++; }) // Otro que no funcionó Observable.create(obs => { obs.next(range(1,100)); obs.complete(); }).pipe( mergeMap((x: [any]) => from(x)), concatMap(x => of(x).pipe(delay(100))) ) .subscribe(x => this.contador = x); range(1,100).pipe(map(row => row), delay(2000)).subscribe(row => { this.contador++; })