JAVASCRIPT

onchange input jquery

$(document).on("input", "#payedValue", function () {
    var mad = $("#madyoniya").val();
    var payed = $(this).val();
    $("#rest").val(parseFloat(mad) - parseFloat(payed));
    
});

jQuery onchange event

$(".date").datepicker({
    onSelect: function(dateText) {
        console.log("Selected date: " + dateText + "; input's current value: " + this.value);
    }
});