decomp.dev/js/manage.ts

document.querySelectorAll('form[data-loading]').forEach((form) => {
  const loadingText = form.getAttribute('data-loading');
  const submitButton = form.querySelector('[type="submit"]');
  if (!submitButton || !(submitButton instanceof HTMLButtonElement)) {
    return;
  }
  form.addEventListener('submit', () => {
    submitButton.disabled = true;
    submitButton.setAttribute('aria-busy', 'true');
    submitButton.innerText = loadingText || 'Loading...';
  });
});