function copyText() {
  // Get the text field
  var roomLink = document.getElementById("roomlink");

  // Select the text field
  roomLink.select();
  roomLink.setSelectionRange(0, 99999); // For mobile devices

   // Copy the text inside the text field
  navigator.clipboard.writeText(roomLink.value);

  // Alert the copied text
  alert("Copied the text: " + roomLink.value);
}