30 lines
1 KiB
HTML
30 lines
1 KiB
HTML
<!DOCTYPE html>
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<title>CSS Cascade: 'revert' in implicit keyframes</title>
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<link rel="help" href="https://drafts.csswg.org/css-cascade/#default">
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<link rel="help" href="https://crbug.com/1065387">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<h1 id=h1></h1>
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<h1 id=ref></h1>
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<script>
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test(function() {
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let expected_lower = parseInt(getComputedStyle(ref).marginTop);
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let expected_upper = expected_lower * 2;
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h1.style = `margin-top: ${expected_lower * 1000}px; margin-top: revert;`;
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h1.animate([
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{ marginTop: `${expected_upper}px` },
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], {
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duration: 1000,
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delay: -500,
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}).pause();
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let actual = parseInt(getComputedStyle(h1).marginTop);
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// This test assumes that the UA style sheet sets a non-0px value on
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// <h1> elements:
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assert_not_equals(expected_lower, 0);
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assert_not_equals(expected_upper, 0);
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assert_between_exclusive(actual, expected_lower, expected_upper);
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}, 'The revert keyword works in implicit keyframes');
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</script>
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