I've never waded into JavaScript, so I'll take your word for it. I've heard some...surprising...things about JavaScript, so I'm not really taken aback that this might exist.
I'm referencing a time when I was in school, and most everything was taught in Java, where that doesn't make sense. This was written by someone who was almost finished their degree and had already started at their professional job. Definitely junior, but I still feel like that's stretching the acceptable level of noobishness. That said, I have an EE degree, so maybe had to solve / reduce a lot more boolean algebra expressions than a straight CS major?