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<!DOCTYPE html>
<title>
Element#requestFullscreen() and Document#exitFullscreen() in iframe
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="../trusted-click.js"></script>
<div id="log"></div>
<iframe allowfullscreen></iframe>
<script>
const iframe = document.querySelector("iframe");
let iframeDoc;
let iframeBody;
promise_setup(async () => {
const iframe = document.querySelector("iframe");
await new Promise((resolve) => {
iframe.onload = resolve;
iframe.src = "about:blank";
});
iframeDoc = iframe.contentDocument;
iframeBody = iframeDoc.body;
});
/**
*
* @param {Document} doc
* @param {HTMLElement} value
* @returns {Promise<Event>}
*/
function makeChangeListener(doc) {
return new Promise((resolve) => {
doc.addEventListener("fullscreenchange", resolve, { once: true });
});
}
// Both when entering and exiting, the fullscreenchange event is fired first
// on the outer document and then on the iframe's document. This is because
// the events are fired in animation frame tasks, which run in "frame tree"
// order.
promise_test(async (t) => {
document.onfullscreenerror = t.unreached_func(
"document fullscreenerror event"
);
iframeDoc.onfullscreenerror = t.unreached_func(
"iframe fullscreenerror event"
);
const outerPromise = makeChangeListener(document);
const innerPromise = makeChangeListener(iframeDoc);
const request = trusted_request(iframeBody, iframeBody);
const winningEvent = await Promise.race([outerPromise, innerPromise]);
assert_equals(winningEvent.target, iframe);
await Promise.allSettled([outerPromise, innerPromise, request]);
assert_equals(
document.fullscreenElement,
iframe,
"outer fullscreenElement"
);
assert_equals(
iframeDoc.fullscreenElement,
iframeBody,
"inner fullscreenElement"
);
}, "Checks that the fullscreenchange events fire in right order when entering fullscreen");
promise_test(async (t) => {
document.onfullscreenerror = t.unreached_func(
"document fullscreenerror event"
);
iframeDoc.onfullscreenerror = t.unreached_func(
"iframe fullscreenerror event"
);
const outerPromise = makeChangeListener(document);
const innerPromise = makeChangeListener(iframeDoc);
const exitPromise = iframeDoc.exitFullscreen();
const winningEvent = await Promise.race([outerPromise, innerPromise]);
assert_equals(winningEvent.target, iframe);
await Promise.allSettled([outerPromise, innerPromise, exitPromise]);
assert_equals(
document.fullscreenElement,
null,
"outer fullscreenElement"
);
assert_equals(
iframeDoc.fullscreenElement,
null,
"inner fullscreenElement"
);
}, "Checks that the fullscreenchange events fire in right order when exiting fullscreen");
</script>
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