<!DOCTYPE html>
<html>
<body>
Number: <input type="number" id="myNumber">
<p>Click the button to increment the value of the number field by 1.</p>
<p><strong>Note:</strong> This is the same as clicking the up arrow on the right side of the number field.</p>
<button onclick="myFunction()">Try it</button>
<p><strong>Note:</strong> The stepUp() method is not supported by Internet Explorer.</p>
<script>
function myFunction() {
document.getElementById("myNumber").stepUp();
}
</script>
</body>
</html>