My reasoning is that, instead of negating all sorts of libraries, one could (by approximation) look up (and follow) the pure form.
Though various JS libraries still can be classified as JS, they constitute another realm of both questions and solutions.
To clarify, and follow @Sly Raskal's suggestion, I'll elaborate a bit.
As a silly example:
Yes, jquery stands for more than 90% of that diff, but this is only a dumb example.
Also note that this is a question not an opinion.