document-fullscreen-enabled-setting-allowfullscreen-timing.sub.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /fullscreen/api/document-fullscreen-enabled-setting-allowfullscreen-timing.sub.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Document#fullscreenEnabled setting allowfullscreen after document creation, before response</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="log"></div>

<script>

// Set allowfullscreen attribute in a timeout after <iframe> has been inserted to the document.

// The iframe's response is delayed so it happens after the attribute is set.

async_test((t) => {

  const iframe = document.createElement('iframe');

  // no allowfullscreen attribute

  const path = location.pathname.substring(0, location.pathname.lastIndexOf('/') + 1);

  iframe.src = "http://{{hosts[][]}}:{{ports[http][0]}}" + path + "resources/echo-fullscreenEnabled.html?pipe=trickle(d1)";

  iframe.onload = t.step_func(() => {

    iframe.contentWindow.postMessage('What is document.fullscreenEnabled?', '*');

});

  window.onmessage = t.step_func_done((e) => {

    assert_false(e.data, 'document.fullscreenEnabled in the iframe');

});

  document.body.appendChild(iframe);

  t.step_timeout(() => {

    iframe.allowFullscreen = true;

  }, 10);

});

</script>