45 lines
1.3 KiB
HTML
45 lines
1.3 KiB
HTML
<!doctype html>
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<meta charset="utf-8">
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<title>Container Queries - Style Change Event for 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-conditional-5/#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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.container {
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container-type: inline-size;
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}
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#outer {
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width: 100px;
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color: green;
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}
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#target {
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transition: color 100s step-end;
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}
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@container (min-width: 200px) {
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#inner { color: red; }
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}
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@container (min-width: 200px) {
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#target {
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/* This rule exists just to have a container query dependency between
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target and #inner */
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background-color: orange;
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}
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}
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</style>
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<div id="outer" class="container">
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<div id="inner" class="container">
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<div id="target">Green</div>
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</div>
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</div>
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<script>
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setup(() => assert_implements_size_container_queries());
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test(() => {
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outer.offsetTop;
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outer.style.width = "200px";
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assert_equals(getComputedStyle(target).color, "rgb(0, 128, 0)");
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}, "#inner color change to red triggers a step transition starting at green");
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</script>
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