JSFiddle - React, Tailwind, and code Playground

HTML

<script>
    function countArguments(who) {
        return function() {
            var args = [].slice.call(arguments);
            console.log(who, args.length);
        }
    }
    window.addEventListener('error', countArguments('addEventListener'), true);
    window.onerror = countArguments('onerror');

</script>

<script onerror="" src="lfdghjdf.js"></script>
<script>
    console.log('');
</script>
<script>
    foobar();

</script>