Scroll-Timeline Revolution: Native CSS Replaces JavaScript for Scroll Animations

CSS Scroll-Timeline resolves a long-standing tension between animation complexity and performance, allowing developers to eliminate heavy libraries like GSAP while maintaining sophisticated visual effects. By moving scroll-driven animations from JavaScript to native CSS, it frees up the main thread and eliminates a major source of scroll jank across millions of websites. This shift democratizes smooth scroll effects—what once required deep JavaScript knowledge is now accessible as simple, declarative CSS.