| <!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 { opacity: 0 } |
| to { opacity: 1 } |
| } |
| #scroller { |
| border: 10px solid lightgray; |
| overflow-y: scroll; |
| width: 300px; |
| height: 200px; |
| } |
| #target { |
| margin: 800px 0px; |
| width: 100px; |
| height: 100px; |
| z-index: -1; |
| background-color: green; |
| animation: anim auto linear; |
| animation-timeline: t1; |
| view-timeline: t1 block; |
| animation-range-start: enter 0%; |
| animation-range-end: enter 100%; |
| /* Sentinel value when in before or after phase of the animation. */ |
| opacity: 0.96875; |
| } |
| </style> |
| <body> |
| <div id=scroller> |
| <div id=target></div> |
| </div> |
| </body> |
| <script type="text/javascript"> |
| async function runTest() { |
| |
| function assert_opacity_equals(expected, errorMessage) { |
| assert_approx_equals( |
| parseFloat(getComputedStyle(target).opacity), expected, 1e-6, |
| errorMessage); |
| } |
| |
| promise_test(async t => { |
| await waitForNextFrame(); |
| const anim = document.getAnimations()[0]; |
| await anim.ready; |
| |
| await waitForNextFrame(); |
| scroller.scrollTop = 650; |
| await waitForNextFrame(); |
| |
| const baseOpacity = 0.96875; |
| // Delays are percentages. |
| const testData = [ |
| { delay: 0, endDelay: 0, opacity: 0.5 }, |
| { delay: 20, endDelay: 0, opacity: 0.375 }, |
| { delay: 0, endDelay: 20, opacity: 0.625 }, |
| { delay: 20, endDelay: 20, opacity: 0.5 }, |
| // Negative delays. |
| { delay: -25, endDelay: 0, opacity: 0.6 }, |
| { delay: 0, endDelay: -25, opacity: 0.4 }, |
| { delay: -25, endDelay: -25, opacity: 0.5 }, |
| // Stress tests with >= 100% total delay. Verify effect is inactive. |
| { delay: 100, endDelay: 0, opacity: baseOpacity }, |
| { delay: 0, endDelay: 100, opacity: baseOpacity }, |
| { delay: 100, endDelay: 100, opacity: baseOpacity } |
| ]; |
| |
| testData.forEach(test => { |
| anim.effect.updateTiming({ |
| delay: CSS.percent(test.delay), |
| endDelay: CSS.percent(test.endDelay) |
| }); |
| assert_opacity_equals( |
| test.opacity, |
| `Opacity when delay=${test.delay} and endDelay=${test.endDelay}`); |
| }); |
| }, 'ViewTimeline with animation delays and range'); |
| } |
| |
| window.onload = runTest; |
| |
| </script> |
| </html> |