Demo of Spinner : Change Event

Change the value and press Tab to move focus out of the spinner.
Tutorial on Spinner

HTML

<input id="spinner" class='selector' value=12  size=3><div id=d1></div>

JQuery

<script>
$(document).ready(function() {
$( "#spinner" ).spinner();
$( "#spinner" ).spinner({change: function() {
var value = $( "#spinner" ).spinner( "value" );
$('#d1').html("Spinner value : " + value);
}
});
})
</script>

Full Code

<html>
<head>
<title></title>
</head>

<input id="spinner" class='selector' size=3><div id=d1></div>

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
<link href="https://code.jquery.com/ui/1.12.1/themes/blitzer/jquery-ui.css" rel="stylesheet">

<script>
$(document).ready(function() {
$( "#spinner" ).spinner();
$( "#spinner" ).spinner({change: function() {
var value = $( "#spinner" ).spinner( "value" );
$('#d1').html("Spinner value : " + value);
}
});
})
</script>
</body>
</html>