| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>ViewTimeline with missing subject</title> |
| <link rel="help" href="https://www.w3.org/TR/scroll-animations-1/#viewtimeline-interface"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <style type="text/css"> |
| #target { |
| background: blue; |
| height: 100px; |
| width: 100px; |
| } |
| #scroller { |
| overflow: scroll; |
| } |
| #filler { |
| height: 300vh; |
| } |
| </style> |
| <body onload="runTests()"> |
| <div id="scroller"> |
| <div id="target"></div> |
| <div id="filler"></div> |
| </div> |
| </body> |
| <script type="text/javascript"> |
| function raf() { |
| return new Promise(resolve => { |
| requestAnimationFrame(() => { |
| requestAnimationFrame(resolve); |
| }) |
| }); |
| } |
| function runTests() { |
| promise_test(async t => { |
| const timeline = new ViewTimeline(); |
| const anim = |
| target.animate( |
| { backgroundColor: ['green', 'red' ] }, |
| { duration: 100, |
| timeline: timeline }); |
| await raf(); |
| scroller.scrollTop = 50; |
| await raf(); |
| assert_equals(timeline.currentTime, null, |
| 'ViewTimeline with missing subject is inactive'); |
| }); |
| } |
| |
| </script> |
| </html> |
