cross-document-nav-same-document-traversal.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/browsers/browsing-the-web/overlapping-navigations-and-traversals/cross-document-nav-same-document-traversal.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>Same-document traversal during cross-document navigation</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<!--

  According to the spec, "apply the history step" will set the ongoing

  navigation to "traversal", canceling any navigation that is still processing

  in parallel and hasn't yet reached "apply the history step".

-->

<body>

<script type="module">

import { createIframe, delay } from "./resources/helpers.mjs";

promise_test(async t => {

  const iframe = await createIframe(t);

  // Setup

  iframe.contentWindow.location.hash = "#1";

  await delay(t, 0);

  iframe.contentWindow.location.hash = "#2";

  await delay(t, 0);

  iframe.contentWindow.location.search = "?1";

  iframe.contentWindow.onload = t.unreached_func("load event fired");

  iframe.contentWindow.history.back();

  assert_equals(iframe.contentWindow.location.search, "", "must not go back synchronously (search)");

  assert_equals(iframe.contentWindow.location.hash, "#2", "must not go back synchronously (hash)");

  // Does go back eventually, and only one step

  await t.step_wait(() => iframe.contentWindow.location.hash === "#1" && iframe.contentWindow.location.search === "");

}, "cross-document navigations are stopped by same-document back()");

</script>