Get value when press key down with keydown2

example.js

$('#query').keydown2(function () {
    console.log($(this).val());
});

keydown2.jquery.js

(function($) {
    $.fn.keydown2 = function(callback) {
        return $(this).each(function() {
            var control = $(this);

            control.keydown(function() {
                setTimeout(function() {
                    callback.call(control, callback);
                }, 0);
            });
        });
    };

})(jQuery);