How do we do in gojs

GoJS
1

As seen in the GIF, there is a space value in the grid lines (Example: 100px), and shapes that indicate it with a pointer appear.

And also snap when distances are equal

Can you share this as an example?

test
test.gif1532×615 535 KB

2

We don’t have an example of exactly that, but you may be able to create it using some combination of the GuidedDraggingTool and DimensioningLink extensions.

3

Can I do this with the NonRealtimeDraggingTool?

4

I suppose one could start from the NonRealtimeDraggingTool, but that would be more work, because GuidedDraggingTool has most of what you want, and because your video shows realtime dragging of nodes.