[jQuery] textarea chars counter

[dreame4]

Hi,

I need to count characters in textarea so I wrote sth like this:

$input.keyup(function() {
        var new_length = $(this).val().length;
        $word_counter.text(new_length);
        if(new_length >= min && new_length <= max) {
                $word_counter.addClass('git');
        } else {
                $word_counter.removeClass('git');
        }
});

But id doesn't work when I click the right mouse button on it and
choose "Paste". Counter is not updated.

Can anyone help?

Thanks,
Adam