Hello rmichel,
I would suggest you read our jqxDataAdapter Tutorial.
You can check if some of the following callbacks of the data adapter is useful for you needs:
beforeSend(jqXHR, settings): A pre-request callback function that can be used to modify the jqXHR
loadError(jqXHR, status, error): A callback function called when the request has failed.
downloadComplete(edata, textStatus, jqXHR): A callback function which is called if the request succeeds. The function gets passed three arguments: The data returned from the server, formatted according to the dataType parameter; a string describing the status; and the jqXHR.
Best Regards,
Martin Yotov
jQWidgets team
https://www.jqwidgets.com