exit.html 489 Bytes
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Exit</title>
</head>
<body>
    <script>
        while(!window.closed) {
            const message = prompt("If you enter \"exit\", the program will exit");
            if(message == "exit") {
                window.close();
            }
        }
    </script>
</body>
</html>