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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="utils.js"></script>
<title>Fenced frame content to report the value of location.ancestorOrigins</title>
<body>
<script>
async function init() { // Needed in order to use top-level await.
// This file is meant to run in a <fencedframe>. It reports back to the
// outermost page the value of `location.ancestorOrigins` correct for:
// 1.) Top-level fenced frames
// 2.) Nested iframes inside a fenced frame
// 3.) Nested fenced frames
const url = new URL(location.href);
const [location_ao_key, location_ao_ack_key, nested] = parseKeylist();
const is_nested_fenced_frame = nested == "nested";
// Report `location.ancestorOrigins`.
writeValueToServer(location_ao_key, Array.from(location.ancestorOrigins).join());
// If this page is a nested fenced frame, all we need to do is report the
// top-level value.
if (is_nested_fenced_frame)
return;
// Wait for ACK, so we know that the outer page has read the last value from
// the `location_ao_key` stash and we can write to it again.
await nextValueFromServer(location_ao_ack_key);
const nested_url = generateURL("location-ancestorOrigins-inner.https.html",
[location_ao_key, location_ao_ack_key, "nested"]);
// Send `location.ancestorOrigins` from an iframe.
const iframe = document.createElement('iframe');
iframe.src = nested_url;
const load_promise = new Promise((resolve, reject) => {
iframe.onload = resolve;
iframe.onerror = reject;
});
document.body.append(iframe);
// Wait for ACK, so we know that the outer page has read the ancestorOrigins
// from the iframe.
await nextValueFromServer(location_ao_ack_key);
attachFencedFrame(nested_url);
}
init();
</script>
</body>
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