A smoothed trend line draws on behind a travelling dot, filling a soft area as it goes, then annotates its own peak

This is the format it was composed for. Switch above to see it lay itself out for another — same animation, re-arranged for the frame.
No Tailwind, no CSS, no asset files. Inline styles only.
A line chart that draws itself on: compute a smooth path from a values array, draw the stroke with evolvePath, wipe a soft area gradient in behind the leading edge, and carry a dot with a value label that counts up as it travels. Gridlines and axis labels first at hairline weight, then a small callout on the peak once the line lands.