<!DOCTYPE html>
<html>
<head>
</head>
<body>
<pre id=message></pre>
<script>
const closed = (message) => {
console.log(message);
document.getElementById('message').innerHTML = `Message: "${message}"\n`;
};
setTimeout(() => { console.log('This must not appear until after the prompt is closed.'); }, 1000);
closed(prompt("Hello friends!"));
</script>
</body>
</html>