manual-scroll-after-dispatch.html (1213B)
1 <!doctype html> 2 <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1"> 3 <script src="/resources/testharness.js"></script> 4 <script src="/resources/testharnessreport.js"></script> 5 <body> 6 <div style="height: 200vh; width: 200vw;"></div> 7 <div id="frag"></div> 8 <script> 9 promise_test(async t => { 10 // Wait for after the load event so that the navigation doesn't get converted 11 // into a replace navigation. 12 await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0)); 13 assert_equals(window.scrollY, 0); 14 await navigation.navigate("#frag").finished; 15 assert_not_equals(window.scrollY, 0); 16 17 let intercept_resolve; 18 let navigate_event; 19 navigation.onnavigate = e => { 20 navigate_event = e; 21 e.intercept({ handler: () => new Promise(r => intercept_resolve = r), 22 scroll: "manual" }); 23 }; 24 let back_promises = navigation.back(); 25 await back_promises.committed; 26 assert_not_equals(window.scrollY, 0); 27 navigate_event.scroll(); 28 assert_equals(window.scrollY, 0); 29 intercept_resolve(); 30 await back_promises.finished; 31 assert_equals(window.scrollY, 0); 32 }, "scroll: scroll() should work after a navigate event dispatch"); 33 </script> 34 </body>