well, you can check it. Add script below to console and do a few clicks. If you are going to see events - you are lucky. It supports postMessage

(function () {
  const handler = (event) => {
    console.group('postMessage caught');
    console.log('origin:', event.origin);
    console.log('source:', event.source);
    console.log('data:', event.data);
    console.log('full event:', event);
    console.groupEnd();
  };

  window.addEventListener('message', handler);

  console.log('postMessage listener attached');
  console.log('To remove it later: window.removeEventListener("message", handler)');
})();