export function actionButton(label, { type = 'button' } = {}) {
  if (typeof label !== 'string' || !label.trim()) {
    throw new TypeError('An action button needs a visible label');
  }
  if (!['button', 'submit'].includes(type)) {
    throw new TypeError('Choose button or submit explicitly');
  }
  const button = document.createElement('button');
  button.type = type;
  button.className = 'action-control';
  button.textContent = label;
  return button;
}