Feature request: 'Floating' Axis orientation, (like time.graphics)

[DevinFour]

On time.graphics, the timeline is positioned in the middle of the page.

When you pan upward, it moves downward until it reaches the very bottom; then it stays fixed there, and the timeline elements go underneath it if you keep panning upwards, like it does in the current 'bottom' axis orientation.

When you pan downward, it’s the same: the axis moves upward and stays fixed at the top when it has hit the top.

This is the behavior I would like to have as well for vis-timeline, in a new orientation besides the 'bottom', 'top' and 'both' orientations.

In time.graphics, there is an additional feature where you can choose whether a timeline element is placed above or below the timeline. We could also add this feature if we implement this, for timeline items and groups.

This would be a cool and intuitive axis orientation, possibly called 'middle' or 'floating'.

I tried to vibe code this but I couldn't get it to work yet. But maybe someone here is smarter than me (and AI)?

See this GIF if you don't know time.graphics: