<!DOCTYPE html>
<html>
<body>

<p>Click the button to find out if the onclick event is a cancelable event.</p>

<button onclick="myFunction(event)">Try it</button>

<p id="demo"></p>

<script>
function myFunction(event) {
    var x = event.cancelable;
    document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>