Check online status

Simpe way to check online status using JS. The idea behind the requests is to check for online status and not just the network status.

<div id="status">Status?</div>
<script>
const checkOnlineStatus = async () => {
  try {
    const online = await fetch("https://your-domain/favicon.ico");
	console.log(online.status, '?????');
    return online.status >= 200 && online.status < 300; // either true or false
  } catch (err) {
	console.log('ERROR!');
    return false; // definitely offline
  }
};

setInterval(async () => {
  const result = await checkOnlineStatus();
  const statusDisplay = document.getElementById("status");
  statusDisplay.textContent = result ? "Online" : "OFFline";
}, 2000); // probably too often, try 30000 for every 30 seconds
</script>