OnCellClick - Filter Vs empty Cell

Hello,
 
Thank you for your question.
 
We want to explain that the handler of cellclick event accepts Cell Data Object as an argument. This object contains detailed information about the cell and can be used to distinguish different cell types.
Please see the following JSFiddle we have prepared to demonstrate this functionality: https://jsfiddle.net/flexmonster/tzmka2y7/. It shows the alert with a cell type every time the cellclick event is triggered.
 
Please let us know if it works for you.
 
Regards,
Illia