I didn't downvote, but your comment seems a bit off-topic (presenting a random js feature in a thread that is not really about this, and there is nothing really

I didn't downvote, but your comment seems a bit off-topic (presenting a random js feature in a thread that is not really about this, and there is nothing really extraordinary in the fact that the OP learned NodeJS last year - good for her!). See also steerpike's comment with which I agree. Your intent may have been sharing this feature that makes you enthousiastic so I can understand that you may find the downvotes frustrating. Don't lose your enthousiasm though, it's a great thing. You may want to review the HN guidelines, they discourage discussing downvotes.