location-ancestorOrigins-inner.https.html

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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>