gsap-core

GSAP Core is the base animation engine for the GreenSock Animation Platform. It provides gsap.to(), gsap.from(), gsap.fromTo(), and gsap.set() for animating DOM elements, SVG, and CSS properties in any JavaScript environment. Includes easing, staggering, transform aliases, responsive control via gsap.matchMedia(), and playback methods on returned Tween instances. CSS animations lack runtime control like pause, reverse, and seek, and become unmanageable once you need synchronized staggers, dynamic values, or responsive motion preferences — GSAP handles all of that with a consistent API across frameworks.