after-transition-traverse-no-fragment.html

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This WPT test may be referenced by the following Test IDs:
- /navigation-api/scroll-behavior/after-transition-traverse-no-fragment.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">

<link rel="help" href="https://html.spec.whatwg.org/#process-scroll-behavior">

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

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

<body>

<div style="height: 200vh; width: 200vw;"></div>

<div id="frag"></div>

<div style="height: 200vh; width: 200vw;"></div>

<script>

promise_test(async t => {

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

  const initial_key = navigation.currentEntry.key;

  window.scrollTo(0, 500);

  assert_equals(window.scrollY, 500);

  await navigation.navigate("#frag").finished;

  assert_not_equals(window.scrollY, 500);

  navigation.onnavigate = e => e.intercept({ scroll: "after-transition" });

  await navigation.traverseTo(initial_key).finished;

  assert_equals(window.scrollY, 500, "scroll position should be restored");

}, "scroll: after-transition on a traverse to an entry without a fragment restores the scroll position");

</script>

</body>