| <!DOCTYPE html> |
| <html id="top"> |
| <meta charset="utf-8"> |
| <title>View timeline delay</title> |
| <link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#viewtimeline-interface"> |
| <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> |
| <script src="/css/css-typed-om/resources/testhelper.js"></script> |
| <style> |
| #container { |
| border: 10px solid lightgray; |
| overflow-x: scroll; |
| height: 200px; |
| width: 200px; |
| } |
| #content { |
| display: flex; |
| flex-flow: row nowrap; |
| justify-content: flex-start; |
| width: 1800px; |
| margin: 0; |
| } |
| .spacer { |
| width: 800px; |
| display: inline-block; |
| } |
| #target { |
| background-color: green; |
| height: 100px; |
| width: 100px; |
| display: inline-block; |
| font-size: 10px; |
| } |
| </style> |
| <body> |
| <div id="container"> |
| <div id="content"> |
| <div class="spacer"></div> |
| <div id="target"></div> |
| <div class="spacer"></div> |
| </div> |
| </div> |
| </body> |
| <script type="text/javascript"> |
| function assert_timeline_offset(actual, expected, errorMessage) { |
| assert_equals(actual.rangeName, expected.rangeName, errorMessage); |
| assert_style_value_equals(actual.offset, expected.offset); |
| } |
| |
| promise_test(async t => { |
| const timeline = new ViewTimeline({ subject: target, axis: 'inline' }); |
| const anim = target.animate({ opacity: [0, 1 ] }, { timeline: timeline }); |
| t.add_cleanup(() => { |
| anim.cancel(); |
| }); |
| await anim.ready; |
| |
| container.scrollLeft = 750; |
| await waitForNextFrame(); |
| |
| // normal ==> cover 0% to cover 100% |
| // cover 0% @ 600px |
| // cover 100% @ 900px |
| // expected opacity = (750 - 600) / (900 - 600) = 0.5 |
| assert_equals(anim.rangeStart, 'normal', 'Initial value for rangeStart'); |
| assert_equals(anim.rangeEnd, 'normal', 'Initial value for rangeEnd'); |
| assert_equals(getComputedStyle(target).opacity, '0.5', |
| 'Opacity with range set to [normal, normal]'); |
| |
| // contain 0% @ 700px |
| // cover 100% @ 900px |
| // expected opacity = (750 - 700) / (900 - 700) = 0.25 |
| await runAndWaitForFrameUpdate(() => { |
| anim.rangeStart = "contain 0%"; |
| anim.rangeEnd = "cover 100%"; |
| }); |
| |
| assert_timeline_offset( |
| anim.rangeStart, |
| { rangeName: 'contain', offset: CSS.percent(0) }, |
| 'rangeStart set to contain 0%'); |
| assert_timeline_offset( |
| anim.rangeEnd, |
| { rangeName: 'cover', offset: CSS.percent(100) }, |
| 'rangeEnd set to cover 100%'); |
| assert_equals(getComputedStyle(target).opacity, '0.25', |
| 'opacity with range set to [contain 0%, cover 100%]'); |
| |
| // entry -20px @ 580px |
| // exit-crossing 10% @ 810px |
| // expected opacity = (750 - 580) / (810 - 580) = 0.739130 |
| await runAndWaitForFrameUpdate(() => { |
| anim.rangeStart = { rangeName: 'entry', offset: CSS.px(-20), }; |
| anim.rangeEnd = { rangeName: 'exit-crossing', offset: CSS.percent(10) }; |
| }); |
| assert_timeline_offset( |
| anim.rangeStart, |
| { rangeName: 'entry', offset: CSS.px(-20) }, |
| 'rangeStart set to entry -20px'); |
| assert_timeline_offset( |
| anim.rangeEnd, |
| { rangeName: 'exit-crossing', offset: CSS.percent(10) }, |
| 'rangeEnd set to exit-crossing 10%'); |
| assert_approx_equals( |
| parseFloat(getComputedStyle(target).opacity), 0.739130, 1e-6, |
| 'opacity with range set to [entry -20px, exit-crossing 10%]'); |
| |
| // normal [start] @ 600px |
| // contain 100% @ 800px |
| // expected opacity = (750 - 600) / (800 - 600) = 0.75 |
| await runAndWaitForFrameUpdate(() => { |
| anim.rangeStart = "normal"; |
| anim.rangeEnd = "contain calc(60% + 40%)"; |
| }); |
| assert_equals(anim.rangeStart, 'normal','rangeStart set to normal'); |
| assert_timeline_offset( |
| anim.rangeEnd, |
| { rangeName: 'contain', offset: CSS.percent(100) }, |
| 'rangeEnd set to contain 100%'); |
| assert_equals(getComputedStyle(target).opacity, '0.75', |
| 'opacity with range set to [normal, contain 100%]'); |
| }, 'Getting and setting the animation range'); |
| </script> |
| </html> |
