navigation-api/navigate-event/intercept-cross-document-same-origin.html

<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script>
async_test(t => {
  let target_url = location.href + "?1";
  navigation.onnavigate = t.step_func_done(e => {
    assert_true(e.cancelable);
    assert_true(e.canIntercept);
    assert_false(e.userInitiated);
    assert_false(e.hashChange);
    e.intercept({ handler: async () => {
      await Promise.resolve();
      t.step_func_done(() => assert_equals(location.href, target_url));
    }});
  });

  window.onload = t.step_func(() => location.href = target_url);
}, "event.intercept() intercepts a same-origin cross-document navigation");
</script>