Check if input has a value add and remove class jQuery

jQuery check if empty input add class

$('input#edit-keys-1').blur(function(){
    tmpval = $(this).val();
    if(tmpval == '') {
        $(this).addClass('empty');
        $(this).removeClass('not-empty');
    } else {
        $(this).addClass('not-empty');
        $(this).removeClass('empty');
    }
});

Thank you, very much. It is good luck!))

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Thank you a lot :-)

Thx so much