| <!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); |
| |
| window.onpopstate = t.step_func(() => assert_not_equals(window.scrollY, 0)); |
| window.onhashchange = t.step_func(() => assert_not_equals(window.scrollY, 0)); |
| |
| // The scroll restore should take place before navigatesuccess fires. |
| let navigatesuccess_called = false; |
| navigation.onnavigatesuccess = t.step_func(() => { |
| navigatesuccess_called = true; |
| assert_equals(window.scrollY, 0); |
| }); |
| |
| let back_promises = navigation.back(); |
| navigation.onnavigate = t.step_func(e => { |
| e.intercept({ scroll: "after-transition", |
| handler: async () => { |
| // The ordering here should be: |
| // * intercept() is called |
| // * back_promises.committed is resolved |
| // * this handler runs. |
| // If this handler incorrectly blocks back_promises.committed, |
| // this test will hang. |
| await back_promises.committed; |
| assert_not_equals(window.scrollY, 0); |
| } |
| }); |
| assert_not_equals(window.scrollY, 0); |
| }); |
| |
| await back_promises.finished; |
| assert_equals(window.scrollY, 0); |
| assert_true(navigatesuccess_called); |
| }, "scroll: after-transition should scroll when back completes, just before navigatesuccess"); |
| </script> |
| </body> |
