Popup's in Grid

Hi

I'm sitting with a project, where I'm trying to get small popups with information, and I thought I'd try to use the Vaadin Grid, since it seems very flexible. 
I absolutely love the example found at:  https://demo.vaadin.com/sampler/#ui/layout/grid-layout, but the sourcecode is a bit vague (Or I'm stupid, one of those :-D), but I just can't seem to find out how to get the small popups which is shown in the example.
 
Anybody here that can be of help?

Best regards
Ben

Hi Benjamin!

Can you post your question to the Framework UI section https://vaadin.com/forum#!/category/10391260.

This section is for Vaadin Elements (Web Components) :D

Thanks!