Scroll events: Human vs code triggered. Can we differentiate?

This is regarding scroll events.
Can I differentiate when a user scrolls from the ones triggered by code?

For example, in jquery we have ev.originalEvent which can tell if this event was triggered by a human.

Or maybe a way to pass custom data when triggering viewer scroll and access the same in event listeners?

Start by reviewing the viewer's scroll-event API and its existing event-dispatch behavior. Determine whether listeners can distinguish user-originated scrolling from programmatic scrolling, or receive custom data when scrolling is triggered. Done means providing a reliable distinction or documented event data, with behavior that is covered by the project's existing validation.

Written by the indexing model from the issue text.