35 lines
1.2 KiB
HTML
35 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<link rel=author href="mailto:graouts@webkit.org">
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<link rel=help href="https://drafts.csswg.org/css-animations/#animations">
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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="/css/css-animations/support/testcommon.js"></script>
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<style>
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@keyframes margin {
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100% { margin-left: 200px }
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}
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#child {
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animation: margin 1s forwards;
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}
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</style>
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<div id="container">
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<div>
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<div id="child"></div>
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</div>
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</div>
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<script>
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test(() => {
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const container = document.getElementById("container");
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const animationCount = () => container.getAnimations({ subtree: true }).length;
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assert_equals(animationCount(), 1, `An animation is running on the child initially with "display: block" on the container.`);
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container.style.display = "none";
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assert_equals(animationCount(), 0, `Setting "display: none" on the container canceled the animation.`);
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container.style.marginLeft = "50px";
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container.firstElementChild.style.marginLeft = "100px";
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assert_equals(animationCount(), 0, `Manipulating styles on the container and a child element does not restart the animation.`);
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}, 'Elements in a "display: none" tree cannot start CSS Animations.');
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</script>
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