<!DOCTYPE html>
<html>
<body>
Try to check this box: <input type="checkbox" id="myCheckbox">
<p>Toggling a checkbox is the default action of clicking on a checkbox. The preventDefault() method prevents this from happening.</p>
<script>
document.getElementById("myCheckbox").addEventListener("click", function(event){
event.preventDefault()
});
</script>
</body>
</html>