| <!DOCTYPE html> |
| <meta charset=utf-8> |
| <title>Root-scrolling timeline with animation moving from end point</title> |
| <link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#scroll-notation"> |
| <link rel="help" href="https://drafts.csswg.org/web-animations/#update-an-animations-finished-state"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/css-animations/support/testcommon.js"></script> |
| <script src="/scroll-animations/scroll-timelines/testcommon.js"></script> |
| <script src="support/testcommon.js"></script> |
| |
| <style> |
| @keyframes anim { |
| from { width: 100px; } |
| to { width: 200px; } |
| } |
| |
| .fill-vh { |
| width: 100px; |
| height: 100vh; |
| } |
| </style> |
| <body> |
| <div id="log"></div> |
| <script> |
| 'use strict'; |
| |
| setup(assert_implements_animation_timeline); |
| |
| promise_test(async t => { |
| const div = addDiv(t, { style: 'width: 50px; height: 100px;' }); |
| const filling = addDiv(t, { class: 'fill-vh' }); |
| const scroller = document.scrollingElement; |
| scroller.scrollTop = 0; |
| await waitForNextFrame(); |
| |
| div.style.animation = 'anim 100s linear'; |
| div.style.animationTimeline = 'scroll(root)'; |
| await waitForCSSScrollTimelineStyle(); |
| |
| const anim = div.getAnimations()[0]; |
| await anim.ready; |
| assert_percents_equal(anim.timeline.currentTime, 0, |
| 'Timeline time when animation is ready'); |
| assert_equals(getComputedStyle(div).width, '100px', |
| 'Width at animation start'); |
| |
| await waitForNextFrame(); |
| const maxScroll = scroller.scrollHeight - scroller.clientHeight; |
| scroller.scrollTop = maxScroll; |
| await waitForNextFrame(); |
| assert_equals(getComputedStyle(div).width, '200px', |
| 'Width at scroll limit'); |
| |
| document.scrollingElement.scrollTop = 0; |
| await waitForNextFrame(); |
| assert_equals(getComputedStyle(div).width, '100px', |
| 'Width after reset to scroll top'); |
| }, 'Test that the scroll animation is still responsive after moving from 100%'); |
| |
| </script> |
| </body> |
