document-fullscreen-enabled-setting-allowfullscreen.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.sub.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Document#fullscreenEnabled setting allowfullscreen after load and then navigating</title>

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

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

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

<script>

async_test((t) => {

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

  // no allowfullscreen attribute

  let i = 0;

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

  iframe.src = "http://{{hosts[][]}}:{{ports[http][0]}}" + path + "resources/echo-fullscreenEnabled.html";

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

    if (i === 0) {

      iframe.allowFullscreen = true;

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

});

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

    i++;

    if (i === 1) {

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

      // Navigate the iframe. This will fire a second 'load' event on the iframe.

      iframe.contentWindow.location.href = iframe.src + '?2';

    } else {

      assert_true(e.data, 'document.fullscreenEnabled in the iframe, after navigation');

      t.done();

});

  document.body.appendChild(iframe);

});

</script>