If I had to guess, they are just a JS-library-following nerd :) the extent of which they have been following this topic might resonate with more people here through this fun comparison.

It goes without saying, that this is meant without any offense whatsoever

I think he meant to type "I have been following this as closely as I follow JS libraries".

@tommit's explanation is correct but I see how my typo might have caused the confusion. I didn't notice it until @Nr7's comment.