pageswap-long-delay.html (1294B)
1 <!DOCTYPE html> 2 <title>View transitions: long delay in pageswap aborts the transition</title> 3 <link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/"> 4 <link rel="author" href="mailto:vmpstr@chromium.org"> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <style> 8 @view-transition { 9 navigation: auto; 10 } 11 </style> 12 <script> 13 const params = new URLSearchParams(location.search); 14 15 switch (params.get("mode") || "test") { 16 case "test": 17 promise_test(async t => { 18 const event = await new Promise(resolve => { 19 window.did_reveal = e => { resolve(e) }; 20 const popup = window.open("?mode=old"); 21 t.add_cleanup(() => popup.close()); 22 }); 23 24 assert_equals(event.viewTransition, null, 25 'viewTransition must have been skipped.'); 26 }); 27 break; 28 case "old": 29 onpageswap = (e) => { 30 assert_not_equals(e.viewTransition, null); 31 32 // Busy loop for 4.5 seconds in order to "synchronously block" 33 var start = Date.now(); 34 var end = start + 4500; 35 while (end - Date.now() > 0); 36 }; 37 38 onload = () => requestAnimationFrame(() => requestAnimationFrame(() => { 39 location.replace('?mode=new'); 40 })); 41 break; 42 case "new": 43 onpagereveal = e => window.opener.did_reveal(e); 44 break; 45 } 46 </script>