Why doesn't af_complete AjaxForm work?

Question

JavaScript

I welcome everyone!
I'm trying to add a class.
The form sends everything, everything works, I try to add a class to the button.

$(document).on('af_complete', function(event,res) {
       if(res.success){
            $('.btn-close').addClass("class-bss");
       	    response.message='';
       }
});

Where to add

the Console

Answer 1

Where to add? how to add? Please show the full code of the page, does jQuery work, does the ajaxForm script work? Where and in what order?

Answer 2

Judging by the error, you need to include jquery.form.js