| Yi Gu | b250a8d | 2020-03-13 23:08:31 | [diff] [blame] | 1 | <html class="reftest-wait"> |
| 2 | <title>Scroll timeline with Web Animation and transition from display:none to display:block</title> |
| 3 | <link rel="help" href="https://drafts.csswg.org/scroll-animations/"> |
| 4 | <meta name="assert" content="Scroll timeline should properly handle going from display:none to display:block"> |
| 5 | <link rel="match" href="animation-ref.html"> |
| 6 | |
| 7 | <script src="/web-animations/testcommon.js"></script> |
| 8 | <script src="/common/reftest-wait.js"></script> |
| 9 | |
| 10 | <style> |
| 11 | #box { |
| 12 | width: 100px; |
| 13 | height: 100px; |
| 14 | background-color: green; |
| 15 | } |
| 16 | |
| 17 | #covered { |
| 18 | width: 100px; |
| 19 | height: 100px; |
| 20 | background-color: red; |
| 21 | } |
| 22 | |
| 23 | #scroller { |
| 24 | overflow: auto; |
| 25 | height: 100px; |
| 26 | width: 100px; |
| 27 | will-change: transform; /* force compositing */ |
| 28 | } |
| 29 | |
| 30 | .removed { |
| 31 | display: none; |
| 32 | } |
| 33 | |
| 34 | #contents { |
| 35 | height: 1000px; |
| 36 | width: 100%; |
| 37 | } |
| 38 | </style> |
| 39 | |
| 40 | <div id="box"></div> |
| 41 | <div id="covered"></div> |
| 42 | <div id="scroller"> |
| 43 | <div id="contents"></div> |
| 44 | </div> |
| 45 | |
| 46 | <script> |
| 47 | const box = document.getElementById('box'); |
| 48 | const effect = new KeyframeEffect(box, |
| 49 | [ |
| 50 | { transform: 'translateY(0)', opacity: 1 }, |
| 51 | { transform: 'translateY(200px)', opacity: 0 } |
| 52 | ], { |
| 53 | duration: 1000, |
| 54 | } |
| 55 | ); |
| 56 | |
| 57 | const scroller = document.getElementById('scroller'); |
| 58 | scroller.classList.add('removed'); |
| 59 | const timeline = new ScrollTimeline({ scrollSource: scroller, timeRange: 1000, orientation: 'block' }); |
| 60 | const animation = new Animation(effect, timeline); |
| 61 | animation.play(); |
| 62 | |
| 63 | waitForAnimationFrames(2).then(_ => { |
| 64 | scroller.classList.remove('removed'); |
| 65 | animation.ready.then(() => { |
| 66 | const maxScroll = scroller.scrollHeight - scroller.clientHeight; |
| 67 | scroller.scrollTop = 0.5 * maxScroll; |
| 68 | |
| 69 | waitForAnimationFrames(2).then(_ => { |
| 70 | takeScreenshot(); |
| 71 | }); |
| 72 | }); |
| 73 | }); |
| 74 | </script> |
