Custom CSS SPAN Message Confirmation (Success/Error)

Hello,

I look to Customize the <span> or the confirmation message appears when a subscriber registers. I obviously tried the direct solution in CSS since the attribute ID = “es_msg” however it displays the block even if the form is not validated … which is not a valid solution for me.

So I searched through JQuery, I try to do that:
jQuery (form) .find (‘. es_msg span’). addClass (‘alert alert-success’);
but without integrating it into the plugin’s e-widget-page.js because of future updates of course.

Is there CallBack for the JS function? OnSuccess type? OnError?
or something like that … I’d just like to show my class alert-success when the user is registered and invert alert-error if that’s not the case.

Looking forward to your valuable help 🙂
thanks, Bertrand