29 lines
1.1 KiB
HTML
29 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>CSS Cascade: 'revert' keyword in transition</title>
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<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
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<link rel="author" title="Mozilla" href="https://mozilla.org">
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<link rel="help" href="https://drafts.csswg.org/css-cascade/#default">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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html, body { margin: 0 }
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h1 {
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margin: 0;
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transition: margin 10s;
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transition-delay: -5s; /* So we can expect it to be half-way the transition when toggling the property */
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}
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</style>
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<h1>This is a header that should get some margin</h1>
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<script>
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test(function() {
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const el = document.querySelector("h1");
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const cs = getComputedStyle(el);
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assert_equals(cs.marginTop, "0px", "Margin before transition");
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el.style.margin = "revert";
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const midTransition = cs.marginTop;
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assert_not_equals(midTransition, "0px", "Margin mid transition");
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el.style.transition = "none";
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assert_not_equals(cs.marginTop, midTransition, "Default margin");
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}, "revert works with transitions");
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</script>
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