| <!DOCTYPE html> |
| <html id="top"> |
| <meta charset="utf-8"> |
| <title>View timeline delay</title> |
| <link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#viewtimeline-interface"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/web-animations/testcommon.js"></script> |
| <script src="/scroll-animations/scroll-timelines/testcommon.js"></script> |
| <script src="/scroll-animations/view-timelines/testcommon.js"></script> |
| <style> |
| #target { |
| margin: 200vh; |
| background-color: green; |
| height: 100px; |
| width: 100px; |
| } |
| </style> |
| <body> |
| <div id="target"></div> |
| </body> |
| <script type="text/javascript"> |
| promise_test(async t => { |
| const timeline = new ViewTimeline({ subject: target }); |
| const anim = target.animate({ opacity: [0, 1 ] }, |
| { timeline: timeline, |
| rangeStart: "entry 0%", |
| rangeEnd: "entry 100%", |
| fill: "both" }); |
| const scroller = document.scrollingElement; |
| const scrollRange = scroller.scrollHeight - scroller.clientHeight; |
| |
| await anim.ready; |
| |
| await waitForNextFrame(); |
| scroller.scrollTop = scrollRange / 2; |
| await waitForNextFrame(); |
| |
| assert_equals(getComputedStyle(target).opacity, "1"); |
| }, 'Test view-timeline with document scrolling element.'); |
| </script> |
