| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#named-timeline-range"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/web-animations/testcommon.js"></script> |
| <script src="support/testcommon.js"></script> |
| <title>Animation range and delay</title> |
| </head> |
| <style type="text/css"> |
| @keyframes anim { |
| from { transform: scaleX(0) translateY(0); } |
| to { transform: scaleX(1) translatey(50vh); } |
| } |
| #scroller { |
| border: 10px solid lightgray; |
| overflow-y: scroll; |
| overflow-x: hidden; |
| width: 300px; |
| height: 200px; |
| } |
| .spacer { |
| height: 200px; |
| } |
| #target { |
| height: 50px; |
| background-color: green; |
| animation: anim auto both linear; |
| animation-timeline: view(); |
| animation-range-start: contain 0%; |
| animation-range-end: contain 100%; |
| } |
| </style> |
| <body> |
| <div id=scroller> |
| <div class="spacer"></div> |
| <div id="target"></div> |
| <div class="spacer"></div> |
| </div> |
| </body> |
| <script type="text/javascript"> |
| async function runTest() { |
| function assert_progress_equals(anim, expected, errorMessage) { |
| assert_approx_equals( |
| anim.effect.getComputedTiming().progress, |
| expected, 1e-6, errorMessage); |
| } |
| |
| promise_test(async t => { |
| await waitForNextFrame(); |
| const anim = document.getAnimations()[0]; |
| await anim.ready; |
| await waitForNextFrame(); |
| |
| // @ contain 0% |
| scroller.scrollTop = 50; |
| await waitForNextFrame(); |
| assert_progress_equals(anim, 0, 'progress at contain 0%'); |
| |
| // @ contain 50% |
| scroller.scrollTop = 125; |
| await waitForNextFrame(); |
| assert_progress_equals(anim, 0.5, 'progress at contain 50%'); |
| |
| // @ contain 100% |
| scroller.scrollTop = 200; |
| await waitForNextFrame(); |
| assert_progress_equals(anim, 1, 'progress at contain 100%'); |
| }, 'ViewTimeline use untransformed box for range calculations'); |
| } |
| |
| window.onload = runTest; |
| </script> |
| </html> |
