GreenSock Animation Platform

GreenSock Animation Platform (GSAP) is a JavaScript animation library for creating high-performance, cross-browser web animations. Developed by Jack Doyle in 2006, GSAP is used by over 11 million websites including Nike, Google, and Apple. Key features: timeline-based animation: create complex sequences with precise timing. Tweens can be nested in timelines, enabling modular compositions. Tween engine: animate any numeric property of any JS object including CSS, SVG attributes, and canvas. Easing: 40+ built-in easing functions (Power, Back, Elastic, Bounce, Circ). Custom easing via CustomEase. Plugins: ScrollTrigger (scroll-based triggers with scrubbing, pinning, snapping), MotionPath (animate along curved paths), Draggable, SplitText, DrawSVG, MorphSVG, Flip (seamless layout animation), and Observer. ScrollTrigger: trigger animations based on scroll position with scrubbing, pinning, and horizontal scroll support. Framework-agnostic: works with React, Vue, Angular, Svelte, and vanilla JS. Performance: JS-based animation for maximum control with hardware acceleration and sub-pixel rendering. Forward and backward playback. Stagger: animate multiple elements with configurable delays. Modifiers: intercept and modify animation values in real-time. JavaScript. Free core with premium plugins.