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<!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>
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