Detect mousedown event on datagrid's scrollbar (SOLVED)

[gordis gmbh]

How can I determine if the mouse is clicked on datagrid's vertical/horizontal scrollbar?
Please note that the datagrid-scrollbars may not be present always. And if they are present, how can I ignore the mousedown event on it.

As seen in the screencast below, a warning is displayed when the user clicks outside the row being edited.
But the warning also gets displayed when the click is on datagrid's vertical scrollbar.

Screencast: https://streamable.com/5eawxt

[gordis gmbh]

I have created a demo to demonstrate the problem - click on the parts of datagrid while having a row in edit mode:
http://jsfiddle.net/2nx5w47z/

How can I identify if the click is on the scrollbar?
Thanks!

[gordis gmbh]

I found a solution to detect mousedown events on scrollbars and ignore them. Here is the updated demo:
http://jsfiddle.net/k8ecnmfp/