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<!DOCTYPE html>
<title>Moving fullscreen document's body into a fullscreen 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>
<iframe allowfullscreen></iframe>
<script>
promise_test(async (t) => {
t.add_cleanup(() => {
if (document.fullscreenElement) {
return document.exitFullscreen();
}
});
const iframe = document.querySelector("iframe");
await new Promise((resolve) => {
iframe.onload = resolve;
iframe.src = "about:blank";
});
const iframeDoc = iframe.contentDocument;
// Enter fullscreen for the iframe's body element.
await Promise.all([
trusted_request(iframeDoc.body, iframeDoc.body),
fullScreenChange(),
]);
assert_equals(
document.fullscreenElement,
iframe,
"document's initial fullscreen element"
);
assert_equals(
iframeDoc.fullscreenElement,
iframeDoc.body,
"iframe's initial fullscreen element"
);
// Then, move the outer document's body into the iframe. This is an unusual
// thing to do, but means that the iframe is removed from its document and
// should trigger fullscreen exit.
iframeDoc.documentElement.appendChild(document.body);
// If we exit in an orderly fashion, that's all one can ask for.
await fullScreenChange();
assert_equals(
document.fullscreenElement,
null,
"document's final fullscreen element"
);
// Because the iframe was removed, its browsing context was discarded and
// its contentDocument has become null. Because that browsing context was
// neither a descendant browsing context nor had an active document,
// nothing at all was done with it in the exit fullscreen algorithm, so
// its fullscreenElement is unchanged.
assert_equals(iframe.contentDocument, null, "iframe's content document");
assert_equals(
iframeDoc.fullscreenElement,
iframeDoc.body,
"iframe's final fullscreen element"
);
});
</script>
|
