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59 lines
1.7 KiB
HTML
59 lines
1.7 KiB
HTML
<!doctype html>
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<title>Container Queries - Scrollbars do not cause transitions</title>
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<link rel="help" href="https://drafts.csswg.org/css-transitions/#starting">
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<link rel="help" href="https://drafts.csswg.org/css-contain-3/#animated-containers">
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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="support/cq-testcommon.js"></script>
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<style>
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#scrollable {
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overflow: auto;
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width: 100px;
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height: 100px;
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}
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#container {
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container-type: inline-size;
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}
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#target {
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background-color: black;
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}
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/* Matches with or without a scrollbar: */
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@container (max-width: 100px) {
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#target {
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background-color: blue;
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}
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}
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/* Matches only when there's a scrollbar: */
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@container (max-width: 99px) {
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#target {
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background-color: green;
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font-size: 10px;
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transition: 2s steps(2, start) background-color;
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}
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}
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</style>
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<div id=scrollable>
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<div id=container>
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<div id=target>
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Foo bar foo bar foo
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Foo bar foo bar foo
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Foo bar foo bar foo
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Foo bar foo bar foo
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Foo bar foo bar foo
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</div>
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</div>
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</div>
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<script>
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setup(() => assert_implements_container_queries());
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test(() => {
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// Whether or not a scrollbar appeared is out of scope for this test.
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// The only thing we care about is that no transition was triggered.
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// Therefore we allow both 'green' and 'blue', but not any other values.
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let has_scrollbar = target.offsetWidth < 100;
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let expected = has_scrollbar ? 'rgb(0, 128, 0)' : 'rgb(0, 0, 255)';
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assert_equals(getComputedStyle(target).backgroundColor, expected);
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}, 'Scrollbars do not cause a transition of background-color');
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</script>
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