Real-life: iif() feature flag

Pick the new stream if enabled === true.

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 { iif, of } = Rx;

const enabled = true;

const result$ = iif(() => enabled, of('new'), of('old'));

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