// Remembers the visitor's chat name in localStorage and fills it in next time.
(function () {
  var input = document.querySelector('#chat [name="chat_name"]');
  if (!input) return;
  try { if (!input.value) input.value = localStorage.getItem('chat-name') || ''; } catch (e) {}
  input.addEventListener('input', function () {
    try { localStorage.setItem('chat-name', input.value.trim()); } catch (e) {}
  });
})();