| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#scroll-timelines-anonymous"> |
| <link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#view-timelines-anonymous"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/scroll-animations/scroll-timelines/testcommon.js"></script> |
| <title>The "animation-timeline" CSS property yields a unique anonymous timeline for siblings matching the same CSS rules</title> |
| <style> |
| |
| @keyframes anim { |
| from { opacity: 0 } |
| } |
| |
| .scroller { |
| overflow-y: scroll; |
| width: 100px; |
| height: 100px; |
| } |
| |
| .scroller > div { |
| width: 100%; |
| height: 100%; |
| |
| animation: anim auto linear; |
| } |
| |
| .scroller.scroll > div { |
| animation-timeline: scroll(); |
| } |
| |
| .scroller.view > div { |
| animation-timeline: view(); |
| } |
| |
| </style> |
| </head> |
| <body> |
| |
| <div class="scroller scroll"> |
| <div></div> |
| <div></div> |
| <div></div> |
| <div></div> |
| <div></div> |
| </div> |
| |
| <div class="scroller view"> |
| <div></div> |
| <div></div> |
| <div></div> |
| <div></div> |
| <div></div> |
| </div> |
| |
| <script> |
| |
| const types = ["scroll", "view"]; |
| |
| types.forEach(type => { |
| test(t => { |
| const scroller = document.querySelector(`.scroller.${type}`); |
| |
| const animations = scroller.getAnimations({ subtree: true }); |
| const numberOfChildren = scroller.childElementCount; |
| assert_equals(animations.length, numberOfChildren, "There are as many animations as there are children"); |
| |
| const timelines = new Set; |
| for (const animation of animations) |
| timelines.add(animation.timeline); |
| assert_equals(timelines.size, numberOfChildren, `There are as many ${type} timelines as there are children`); |
| }, `Setting "animation-timeline: ${type}()" yields a unique ${type} timeline for siblings matching the same CSS rules`); |
| }); |
| |
| </script> |
| </body> |
| </html> |
