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<!doctype html>
<title>Test for bug 1771150</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<style>
#fullscreen {
background-color: rgba(0, 255, 0, .5);
}
#fullscreen::backdrop {
background-color: transparent;
}
#fullscreen, #fullscreen::backdrop {
pointer-events: none;
}
</style>
<div id="fullscreen"></div>
<button>Go fullscreen</button>
<script>
const button = document.querySelector("button");
let clickCount = 0;
let lastFullscreenPromise = null;
let shouldEnterFullscreen = false;
button.addEventListener("click", function(e) {
clickCount++;
if (shouldEnterFullscreen) {
const fullscreenElement = document.getElementById("fullscreen");
lastFullscreenPromise = SimpleTest.promiseFocus().then(() => {
fullscreenElement.focus();
return fullscreenElement.requestFullscreen();
});
}
});
function clickButton(expectEvent) {
let lastClickCount = clickCount;
synthesizeMouseAtCenter(button, {});
(expectEvent ? isnot : is)(clickCount, lastClickCount, `Should've ${expectEvent ? "" : "not "}been able to click`);
}
function enterFullscreen() {
lastFullscreenPromise = null;
shouldEnterFullscreen = true;
clickButton(true);
shouldEnterFullscreen = false;
isnot(lastFullscreenPromise, null, "Should be transitioning to fullscreen");
return lastFullscreenPromise;
}
async function testFullscreenIsModal(modal) {
info("testing modal: " + modal);
is(document.fullscreenElement, null, "Shouldn't be in fullscreen");
await enterFullscreen();
clickButton(/* expectEvent = */ !modal);
ok(document.fullscreenElement.matches(":fullscreen"), "Fullscreen element matches :fullscreen");
is(document.fullscreenElement.matches(":modal"), modal, "Fullscreen element matches :modal");
await document.exitFullscreen();
clickButton(/* expectEvent = */ true);
}
add_task(async function() {
await testFullscreenIsModal(true);
});
</script>
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