after-transition-push.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:
- /navigation-api/scroll-behavior/after-transition-push.html - WPT Dashboard Interop Dashboard

<!doctype html>

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

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

<body>

<div style="height: 1000px; width: 1000px;"></div>

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

<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));

  assert_equals(window.scrollY, 0);

  let intercept_resolve;

  let navigate_event;

  navigation.onnavigate = e => {

    navigate_event = e;

    e.intercept({ handler: () => new Promise(r => intercept_resolve = r),

                  scroll: "after-transition" });

};

  let promises = navigation.navigate("#frag");

  await promises.committed;

  assert_equals(window.scrollY, 0);

  intercept_resolve();

  await promises.finished;

  assert_not_equals(window.scrollY, 0);

}, "scroll: after-transition should work on a push navigation");

</script>

</body>