| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>ScrollTimeline snapshotting</title> |
| <link rel="help" href="https://wicg.github.io/scroll-animations"> |
| <script src='../../../resources/testharness.js'></script> |
| <script src='../../../resources/testharnessreport.js'></script> |
| <script src='../../../external/wpt/web-animations/testcommon.js'></script> |
| <script src='../../../external/wpt/scroll-animations/testcommon.js'></script> |
| <style> |
| .scroller { |
| overflow: auto; |
| height: 100px; |
| width: 100px; |
| will-change: transform; |
| } |
| |
| .contents { |
| height: 1000px; |
| width: 100%; |
| } |
| </style> |
| <div id="log"></div> |
| |
| <script> |
| 'use strict'; |
| |
| promise_test(async t => { |
| var animation = createScrollLinkedAnimation(t); |
| var scroller = animation.timeline.scrollSource; |
| const maxScroll = scroller.scrollHeight - scroller.clientHeight; |
| |
| animation.play(); |
| await animation.ready; |
| |
| scroller.scrollTop = maxScroll; |
| await animation.finished; |
| |
| // Do not hold a reference to the animation. |
| animation = null; |
| GCController.collectAll(); |
| |
| scroller.scrollTop = 0.5 * maxScroll; |
| await waitForNextFrame(); |
| |
| // Scroller is alive - animation is not GC'ed. |
| assert_equals(document.getAnimations().length, 1, |
| 'Animation must remain active.'); |
| |
| }, 'Scroll animation is not GC\'ed when scroller is alive.'); |
| |
| |
| </script> |
