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<!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>
<script src="/web-animations/resources/keyframe-utils.js"></script>
<title>Animation range and delay</title>
</head>
<style type="text/css">
@keyframes anim {
cover 0% {
margin-left: 0px;
}
50% {
opacity: 0.5;
}
cover 100% {
margin-right: 0px;
}
}
#scroller {
border: 10px solid lightgray;
overflow-y: scroll;
overflow-x: hidden;
width: 300px;
height: 200px;
view-timeline: t1 defer;
}
#block {
margin-top: 800px;
margin-left: 10px;
margin-right: 10px;
width: 100px;
height: 50px;
background-color: blue;
view-timeline: t1 ancestor;
}
#target {
margin-bottom: 800px;
margin-left: 10px;
margin-right: 10px;
width: 100px;
height: 100px;
z-index: -1;
background-color: green;
animation: anim auto both linear;
animation-range-start: contain 0%;
animation-range-end: contain 100%;
animation-timeline: t1;
}
</style>
<body>
<div id="scroller">
<div id="block"></div>
<div id="target"></div>
</div>
</body>
<script type="text/javascript">
async function runTest() {
promise_test(async t => {
await waitForNextFrame();
const anims = document.getAnimations();
assert_equals(anims.length, 1,
"Should have one animation attached to the view-timeline");
const anim = anims[0];
await anim.ready;
await waitForNextFrame();
let frames = anim.effect.getKeyframes();
let expected_resolved_offsets = [
{ offset: 0, computedOffset: 0, easing: "linear", composite: "replace",
marginRight: "10px", opacity: "1" },
{ offset: 1/2, computedOffset: 1/2, easing: "linear",
composite: "auto", opacity: "0.5" },
{ offset: 1, computedOffset: 1, easing: "linear", composite: "replace",
marginLeft: "10px", opacity: "1" },
{ offset: { rangeName: "cover", offset: CSS.percent(0) },
computedOffset: -1/3, easing: "linear",
composite: "auto", marginLeft: "0px" },
{ offset: { rangeName: "cover", offset: CSS.percent(100) },
computedOffset: 4/3, easing: "linear", composite: "auto",
marginRight: "0px" },
];
assert_frame_lists_equal(frames, expected_resolved_offsets,
'Initial keyframes with active view-timeline');
block.style.display = 'none';
// View-timeline becomes inactive. Keyframes with timeline offsets must be
// ignored.
frames = anim.effect.getKeyframes();
let expected_unresolved_offsets = [
{ offset: 0, computedOffset: 0, opacity: "1", easing: "linear",
composite: "replace" },
{ offset: 0.5, computedOffset: 0.5, opacity: "0.5", easing: "linear",
composite: "auto", },
{ offset: 1, computedOffset: 1, opacity: "1", easing: "linear",
composite: "replace" },
{ offset: { rangeName: 'cover', offset: CSS.percent(0) },
computedOffset: null, easing: "linear",
composite: "auto", marginLeft: "0px" },
{ offset: { rangeName: 'cover', offset: CSS.percent(100) },
computedOffset: null, easing: "linear", composite: "auto",
marginRight: "0px" }
];
assert_frame_lists_equal(frames, expected_unresolved_offsets,
'Keyframes with invalid view timeline');
block.style.display = 'block';
// Timeline remains inactive until next frame.
await waitForNextFrame();
// Ensure that keyframes with timeline-offsets are restored.
frames = anim.effect.getKeyframes();
assert_frame_lists_equal(frames, expected_resolved_offsets,
'Keyframes with restored view timeline');
}, 'Keyframes with timeline-offsets ignored when timeline is inactive');
}
window.onload = runTest;
</script>
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