How easily to hook into native jQuery event,, I have built example to alter attr method, but it can easily be 'addClass', 'removeClass' etc..

jQuery-hook-and-bind-to-addClass-or-attr-method.js

(function($) {
		// save Original attr method!
    var orgAttr = $.fn.attr;
    // Change attr | addClass | similar method to be able to hook to JQ event
    $.fn.attr = function(){
        var result = orgAttr.apply( this, arguments ); // Execute the original method.
        $(this).trigger('customTriggerName'); // trigger custom event on element
        return result; // return the original result
    }
    // HOOK @ ATTR binded event
    $('.element').bind('customTriggerName', function(event){
    	// do some custom stuff here!
    });
})(jQuery);