CSS Scroll-Driven Animations: Interactive Progress Timeline with Cards
Prompt
Create an interactive timeline with cards that animate as you scroll. Each card should have a progress bar that fills based on scroll position, and the cards should fade in and slide into position. Use CSS scroll-driven animations with @scroll-timeline and animation-timeline.
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This interactive timeline demonstrates CSS Scroll-Driven Animations, a modern CSS feature that allows animations to be controlled by scroll position without JavaScript. Each card animates into view with a slide-in effect as you scroll, while the progress bar fills proportionally to the scroll progress through that card's section.
The implementation uses @scroll-timeline to define a scroll timeline and animation-timeline to attach animations to scroll progress. The animation-range property controls when each animation starts and ends relative to the element's position in the viewport.
This technique provides smooth, performant scroll-linked animations that work natively in modern browsers, offering an engaging user experience for timelines, progress indicators, and scroll-triggered content reveals.
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