manual-scroll-repeated.html

Enable keyboard shortcuts

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/manual-scroll-repeated.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);

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

  assert_not_equals(window.scrollY, 0);

  navigation.onnavigate = e => {

    e.intercept({

      scroll: "manual",

      handler: t.step_func(() => {

        e.scroll();

        assert_equals(window.scrollY, 0);

        assert_throws_dom("InvalidStateError", () => e.scroll());

})

});

};

  await navigation.back().finished;

  assert_equals(window.scrollY, 0);

}, "scroll: scroll() should throw if called a second time");

</script>

</body>