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<!DOCTYPE html>
<!--
Tentative due to:
https://github.com/whatwg/fullscreen/issues/152
-->
<title>Element#requestFullscreen() on two elements in the same document</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="a"></div>
<div id="b"></div>
<script>
promise_test(async (test) => {
// Request fullscreen on both elements, but in reverse tree order.
const a = document.getElementById('a');
const b = document.getElementById('b');
// Expect two fullscreenchange events, with document.fullscreenElement
// changing in the same order as the requests.
const order = [];
const fullscreenChangePromise = new Promise((resolve, reject) => {
document.onfullscreenchange = test.step_func(() => {
assert_in_array(document.fullscreenElement, [a, b]);
order.push(document.fullscreenElement.id);
if (order.length == 2) {
// Since fullscreenchange event occurs at animation frame timing we might
// have not seen the transition from null -> 'b' but just see the
// resulting 'a' transition twice.
assert_true(order[0] == 'a' || order[0] == 'b', 'first id seen is a or b');
assert_true(order[1] == 'a', 'second id seen is b');
}
resolve();
});
});
const fullscreenErrorPromise = new Promise((resolve, reject) => {
document.onfullscreenerror = test.step_func(() => {
resolve();
});
});
trusted_click(test, () => {
b.requestFullscreen();
var p = a.requestFullscreen();
if (p) {
p.then(test.unreached_func("promise unexpectedly resolved"), ()=>{});
}
}, document.body);
await Promise.all([
fullscreenChangePromise,
fullscreenErrorPromise,
]);
});
</script>
|
