Display pop up for confirmation before update, delete

Hello one and all,
I’m new to dhtmlx and I have a problem with the component and dataprocessor DataConnector.
I want to apply before changes made to the grid, displayed a pop up confirmation, it is about the user clicks the OK button that the change is made.
It is the same for an error, I want a message to appear on a pop up.

Thank you for giving me a little of your time.