load_img_and_post_result_header.html

Enable keyboard shortcuts

<html>

<body>

  <script>

    var img = document.createElement("img");

    img.src = "/content-security-policy/support/pass.png";

    img.onload = function() { parent.postMessage('img loaded', '*'); }

    img.onerror = function() { parent.postMessage('img not loaded', '*'); }

    document.body.appendChild(img);

  </script>

</body>

</html>