The last outpost i know is GSAP, but it mostly used for banner/logo/wow-kind-of animations, not the UI.. for example you have:
hover, focus and active control states =>
a, b, cnow, combinations are
a, b, c, ab, ac, bc, abc => 7 visual states total, now, count transitions from one state to another...
it grows like a cancer🤤 at this point