<!DOCTYPE html>
<html>
<body>
<p>Change the number in the number field, and then click the button below.</p>
Number: <input type="number" id="myNumber" value="2">
<p>Note that the default value is not affected when you change the value of the number field.</p>
<button type="button" onclick="myFunction()">Try it</button>
<p><strong>Note:</strong> input elements with type="number" are not supported in IE 9 and earlier versions.</p>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myNumber");
var defaultVal = x.defaultValue;
var currentVal = x.value;
if (defaultVal == currentVal) {
document.getElementById("demo").innerHTML = "Default value and current value is the same: "
+ x.defaultValue + " and " + x.value
+ "<br>Change the number of number field to see the difference!";
} else {
document.getElementById("demo").innerHTML = "The default value was: " + defaultVal
+ "<br>The new, current value is: " + currentVal;
}
}
</script>
</body>
</html>