Scroll this frame
The blue bar follows the document scroll position. Reduced motion is enabled, so the bar stays full.
This browser does not support CSS scroll timelines yet.
Start at 0%
The bar starts at the left edge of the frame.
Keep scrolling
The animation progress comes from the root scroller.
Almost there
No scroll event listener or JavaScript is running.
Finish at 100%
The bar reaches the right edge at the bottom.