JAVASCRIPT

jquery on change

// modify #inputId selector as per your code
$( "#inputId" ).change(function() {
  alert( "Handler for .change() called." );
});

//OR
$("#InputId").on('change', function(){
    alert( 'Handler for "change" called.' );
});

// OR
$("body").on('change', '#InputId', function(){
    alert( 'Handler for "change" called.' );
});

jquery on change

$(document).on('change', 'input', function() {
  // Does some stuff and logs the event to the console
});

value change event jquery

$("#input").change(function(){
  alert("The text has been changed.");
});

jquery on element change

// On element change.
$('mydiv').bind('DOMSubtreeModified', function () {
  console.log('changed');
});

jQuery onchange event

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