just a idea, but how about a option for 2 items in the same group.

[nntb]

so i am working on something with this timeline and though wouldn't it be cool if i had 2 items in the same group have a option to ether prevent it from dragging into a area where something was (make it slide away) or light up when set down maybe ad one of these thick bars in the space that was in issue.

just a idea. i am having fun wrapping my head around this visjs thing how data goes in and out and working on my own stuff. but just passing ideas along.