| <!DOCTYPE html> |
| <title>ViewTimeline vs. scroll-padding-*</title> |
| <link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#view-timelines"> |
| <link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#view-progress-visibility-range"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/web-animations/testcommon.js"></script> |
| <script src="/scroll-animations/scroll-timelines/testcommon.js"></script> |
| <script src="/scroll-animations/view-timelines/testcommon.js"></script> |
| <style> |
| #container { |
| border: 10px solid lightgray; |
| overflow-y: scroll; |
| height: 200px; |
| width: 200px; |
| scroll-padding: 40px; |
| } |
| .spacer { |
| height: 800px; |
| } |
| #target { |
| background-color: green; |
| height: 200px; |
| width: 100px; |
| } |
| </style> |
| <body> |
| <div id="container"> |
| <div id="leading-space" class="spacer"></div> |
| <div id="target"></div> |
| <div id="trailing-space" class="spacer"></div> |
| </div> |
| </body> |
| <script> |
| promise_test(async t => { |
| container.scrollTop = 0; |
| await waitForNextFrame(); |
| |
| const anim = CreateViewTimelineOpacityAnimation(t, target); |
| await anim.ready; |
| |
| // 0% |
| container.scrollTop = 600; |
| await waitForNextFrame(); |
| assert_percents_equal(anim.currentTime, 0); |
| |
| // 50% |
| container.scrollTop = 800; |
| await waitForNextFrame(); |
| assert_percents_equal(anim.currentTime, 50); |
| |
| // 100% |
| container.scrollTop = 1000; |
| await waitForNextFrame(); |
| assert_percents_equal(anim.currentTime, 100); |
| }, 'Default ViewTimeline is not affected by scroll-padding'); |
| </script> |
| </html> |
