This code should prevent a session from going to sleep. You can verify in Windows using ‘powercfg /requests’

<script>
navigator.wakeLock.request("screen");

const handleVisibilityChange = () => {
  if (document.visibilityState === 'visible') {
	navigator.wakeLock.request("screen");
  }
};
document.addEventListener('visibilitychange', handleVisibilityChange);
</script>