A scroll progress indicator widget for gio.
~whereswaldon developed a view-only version of this for sprig, and ~jackmordaunt contributed support for clicking within the scroll tray area and for dragging the indicator to move it. We agreed that the feature was generally useful and have pulled it out of the sprig repository so that other gio users can benefit.
This repository does not have a stable API. Pin yourself to a particular version with go modules.