Scroll shadows are a UX design technique that can be implemented using CSS animations tied to scroll position.
Different approaches like using background gradients with animations, animation-timeline, and CSS masks have been explored for creating scroll shadows.
One method involves using a CSS mask to fade out the edges of a scrollable element, which works well for horizontally scrollable content.
By combining custom properties, keyframes animations, and animation-timelines in CSS, scroll-driven visual effects like fading edges can be created without the need for JavaScript.