Real-life: raceWith() API mirror

The primary is delayed, the mirror is fast. The mirror should win.

1. Solve the task in the editor — no long theory.
2. Run the check and compare your output with the expected result.
3. Stuck? Open the solution and carry the approach into your own code.

const { of, delay, raceWith } = Rx;

const primary$ = of('primary').pipe(delay(5));
const mirror$ = of('mirror');

const result$ = primary$.pipe(
  raceWith(mirror$)
);

result$.subscribe(value => console.log(value));