anchor-fragment-history-back-on-click.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/anchor-fragment-history-back-on-click.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

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

<script>

promise_test(async t => {

  // Wait for after the load event so that the navigation doesn't get converted

  // into a replace navigation.

  await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));

  location.hash = "#1";

  assert_equals(location.hash, "#1");

  location.hash = "#2";

  assert_equals(location.hash, "#2");

  let anchor = document.createElement("a");

  anchor.href = "#3";

  anchor.onclick = () => {

    history.back();

};

  let navigations = [];

  let navigationsPromise = new Promise(resolve => {

    onpopstate = () => {

      navigations.push(location.hash);

      if (navigations.length === 2) {

        resolve();

});

  anchor.click();

  await navigationsPromise;

  // We were on #2 when history.back() was called so we should be on #1 now.

  assert_equals(location.hash, "#1");

  // While the history navigation back to "#1" was pending, we should have navigated to "#3".

  assert_array_equals(navigations, ["#3", "#1"]);

}, "Anchor with a fragment href and a click handler that navigates back");

</script>