components/test/data/actor/oopif_red_dropdown.html

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="width=device-width, minimum-scale=1.0">
  </head>
  <body>
    <script>
const frameOrigin = decodeURIComponent(window.location.search.substring(1));

function createIframe() {
  const iframe = document.createElement('iframe');
  iframe.src = frameOrigin + '/actor/red_dropdown.html';
  iframe.width = 800;
  iframe.height = 800;
  iframe.id = 'iframe';
  document.body.appendChild(iframe);

  const iframe_loaded = new Promise((resolve) => {
    iframe.addEventListener('load', function() {
      resolve();
    });
  });
  return iframe_loaded;
}
    </script>
  </body>
</html>