https://www.smashingmagazine.com/2024/12/introduction-css-scroll-driven-animations/
An Introduction To CSS Scroll-Driven Animations: Scroll And View Progress Timelines — Smashing...
10 years after scroll-driven animations were first proposed, they’re finally here — no JavaScript, no dependencies, no libraries, just pure CSS.
an introductionview progresscssscrolldriven
https://scroll-driven-animations.style/tools/view-timeline/ranges/
View Progress Timeline: Ranges and Animation Progress Visualizer
view progresstimelinerangesanimationvisualizer