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<!doctype html>
<html>
<head>
<title>shadowRoot.fullscreenElement works correctly</title>
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="help" href="https://fullscreen.spec.whatwg.org/#dom-document-fullscreenelement">
</head>
<div id="host">
<button onclick="document.exitFullscreen()" id="exitButton">Exit fullscreen</button>
</div>
<button id="requestButton">Go fullscreen</button>
<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>
promise_test(async function() {
let host = document.getElementById("host");
host.attachShadow({ mode: "open" }).innerHTML = `
<style>
#outer { width: 200px; height: 200px; background: blue }
</style>
<div id="outer">
<slot></slot>
</div>
`;
let outer = host.shadowRoot.querySelector("#outer");
await new Promise((resolve) => {
addEventListener("fullscreenchange", resolve, { once: true });
requestButton.addEventListener("click", () => outer.requestFullscreen());
test_driver.click(requestButton);
});
assert_equals(outer.getRootNode().fullscreenElement, outer, "Correct shadowRoot.fullscreenElement after entering");
assert_equals(document.fullscreenElement, host, "Correct document.fullscreenElement after entering");
await new Promise((resolve) => {
addEventListener("fullscreenchange", resolve, { once: true });
test_driver.click(exitButton);
});
assert_equals(outer.getRootNode().fullscreenElement, null, "Correct shadowRoot.fullscreenElement after exiting");
assert_equals(document.fullscreenElement, null, "Correct document.fullscreenElement after exiting");
}, "shadowRoot.fullscreenElement works correctly");
</script>
</html>
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