File: element-request-fullscreen-and-move-to-iframe-manual.html

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<!DOCTYPE html>
<title>Element#requestFullscreen() followed by moving the element into an iframe</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../trusted-click.js"></script>
<div id="log"></div>
<div id="target"></div>
<iframe allowfullscreen></iframe>
<script>
async_test(t => {
  const target = document.getElementById("target");
  const iframeDoc = document.querySelector("iframe").contentDocument;

  iframeDoc.onfullscreenchange = t.unreached_func("fullscreenchange event in iframe");
  iframeDoc.onfullscreenerror = t.unreached_func("fullscreenerror event in iframe");
  document.onfullscreenchange = t.unreached_func("fullscreenchange event");
  document.onfullscreenerror = t.step_func_done(() => {
    assert_equals(document.fullscreenElement, null, "outer fullscreen element");
    assert_equals(iframeDoc.fullscreenElement, null, "inner fullscreen element");
    assert_equals(event.target, document, "event target");
  });

  trusted_click(t, () => {
    target.requestFullscreen();
    iframeDoc.body.appendChild(target);
  }, document.body);
});
</script>