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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="../trusted-click.js"></script>
<div id="log"></div>
<iframe allowfullscreen></iframe>
<script>
// wait for load event to avoid https://bugzil.la/1493878
window.onload = function() {
async_test(t => {
const iframe = document.querySelector('iframe');
const iframeDoc = iframe.contentDocument;
const iframeBody = iframeDoc.body;
let count = 0;
document.onfullscreenchange = iframeDoc.onfullscreenchange = t.step_func(event => {
count++;
assert_between_inclusive(count, 1, 4, 'number of fullscreenchange events');
// 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.
const expected = {
target: count == 1 || count == 3 ? iframe : iframeBody,
outerFullscreenElement: count <= 2 ? iframe : null,
innerFullscreenElement: count <= 2 ? iframeBody : null,
};
assert_equals(event.target, expected.target, 'event target');
assert_equals(document.fullscreenElement, expected.outerFullscreenElement, 'outer fullscreenElement');
assert_equals(iframeDoc.fullscreenElement, expected.innerFullscreenElement, 'inner fullscreenElement');
if (count == 2) {
iframeDoc.exitFullscreen();
} else if (count == 4) {
// Done, but set timeout to fail on extra events.
step_timeout(t.step_func_done());
}
});
document.onfullscreenerror = t.unreached_func('fullscreenerror event');
iframeDoc.onfullscreenerror = t.unreached_func('iframe fullscreenerror event');
trusted_request(t, iframeBody, iframeBody);
});
};
</script>
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