How to find indication of a Validation error (required=“true”) while doing ajax command

Question

I have a form inside a dialog which I close by clicking on commandbutton with ajax ,

like this

Answer 1

@BalusC

in your example code the clientId of the button is not set as a param because it is a AJAX request. So

not empty param[add.clientId] is always false.

But this works:

param['javax.faces.source'] eq add.clientId

(tested with jsf-impl-2.2.12.redhat-1)

regards