| <!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 = t.step_func(e => { |
| e.transitionWhile(Promise.resolve(), { scrollRestoration: "manual" }); |
| e.restoreScroll(); |
| assert_equals(window.scrollY, 0); |
| assert_throws_dom("InvalidStateError", () => e.restoreScroll()); |
| }); |
| await navigation.back().finished; |
| assert_equals(window.scrollY, 0); |
| }, "scrollRestoration: restoreScroll() should throw if called a second time"); |
| </script> |
| </body> |
