Hide Messenger Launcher Until New Message Is Received.html

<script>
/* Hide Gist Messenger Launcher on page load */
gist.chat('hideLauncher');

/* open the Messenger when you receive a message */
document.addEventListener("onGistUnreadCountChange", function(e) {
  if(window.gistUnreadCount > 0) {
    gist.chat('open');
  }
});
</script>