| <!DOCTYPE html> |
| <style> |
| #box { |
| width: 100px; |
| height: 100px; |
| background-color: #00ff00; |
| /* |
| * Force compositing. |
| * TODO(majidvp): Should not be needed when http://crbug.com/776533 is fixed. |
| */ |
| will-change: transform; |
| } |
| |
| #covered { |
| width: 100px; |
| height: 100px; |
| background-color: #ff8080; |
| } |
| |
| #scroller { |
| overflow: auto; |
| height: 100px; |
| width: 100px; |
| /* |
| * Force compositing. |
| * TODO(crbug.com/776533): Shouldn't be needed - we should fallback to main if scroller isn't composited. |
| */ |
| will-change: transform; |
| } |
| |
| #contents { |
| height: 1000px; |
| width: 100%; |
| } |
| </style> |
| |
| <div id="box"></div> |
| <div id="covered"></div> |
| <div id="scroller"> |
| <div id="contents"></div> |
| </div> |
| |
| <script id="visual_update" type="text/worklet"> |
| registerAnimator("test_animator", class { |
| animate(currentTime, effect) { |
| effect.localTime = currentTime; |
| } |
| }); |
| </script> |
| |
| <script src="resources/animation-worklet-tests.js"></script> |
| <script> |
| if (window.testRunner) { |
| testRunner.waitUntilDone(); |
| } |
| |
| runInAnimationWorklet( |
| document.getElementById('visual_update').textContent |
| ).then(()=>{ |
| const box = document.getElementById('box'); |
| const effect = new KeyframeEffect(box, |
| [ |
| { transform: 'translateY(0)', opacity: 1}, |
| { transform: 'translateY(200px)', opacity: 0} |
| ], { |
| duration: 1000, |
| } |
| ); |
| |
| const scroller = document.getElementById('scroller'); |
| const timeline = new ScrollTimeline({ scrollSource: scroller, timeRange: 1000, orientation: 'block' }); |
| const animation = new WorkletAnimation('test_animator', [effect], timeline, {}); |
| animation.play(); |
| |
| // Move the scroller to the halfway point. |
| const maxScroll = scroller.scrollHeight - scroller.clientHeight; |
| scroller.scrollTop = 0.5 * maxScroll; |
| |
| if (window.testRunner) { |
| waitTwoAnimationFrames(_ => { |
| testRunner.notifyDone(); |
| }); |
| } |
| }); |
| </script> |