The implementation here would decide if this is "janky" or not as in web-dev circles, "janky" specifically refers to stuttering, lag, juddering and such, not in general something that is "hacky" (poor or ad-hoc solution).

So if it's performant, it's not "janky" (again, in web-dev circles) but it could still be a "hacky" implementation, even without any jank. It's also different from "robust", so something can be not-janky but also not-robust.