// Show dialog for saving the current config.
  function showSaveDialog(e) {
    saveError.innerText = '';
    showDialog(saveDialog);
    saveInput.focus();
  }

  // Commit save config.
  function commitSave(e) {
    const name = saveInput.value;
    const url = new URL(document.URL);
    // Set path relative to existing path.
    url.pathname = new URL('./saveconfig', document.URL).pathname;