Gsap Scrolltrigger

This is the official GSAP ScrollTrigger implementation that handles scroll-driven animations, element pinning, and scrub effects. It covers the full API including batch operations for coordinating multiple elements, containerAnimation for fake horizontal scrolling, and all the trigger positioning syntax. The skill provides proper configuration patterns for common use cases like parallax, reveal animations, and pinned sections. One thing to note is that ScrollTrigger can be overkill for simple fade-ins where Intersection Observer might suffice, but when you need precise scroll positioning or complex timeline scrubbing, this gives you the complete toolkit.