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