wpt/css/css-conditional/at-supports-namespace-001.html at master · web-platform-tests/wpt · GitHub

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<!doctype html>
<head>
	<title>CSS Test (Conditional Rules): Validity of namespaces in @supports</title>
	<link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact">
	<link rel="help" href="https://www.w3.org/TR/css-conditional-3/#contents-of">
	<link rel="help" href="https://www.w3.org/TR/css-conditional-3/#use">
	<link rel="help" href="https://www.w3.org/TR/css-namespaces/">
	<link rel="help" href="https://www.w3.org/TR/CSS2/generate.html#content">
	<link rel="help" href="https://www.w3.org/TR/css-conditional-3/#at-supports">
	<link rel="match" href="at-supports-001-ref.html">
	<meta name="assert"
	      content="Test passes if namespaces used within @supports are valid only if declared in a valid @namespace rule.">
	<style>
		@namespace x "http://www.w3.org/1999/xlink";
		@supports (background: green) {}
		@namespace y "http://www.w3.org/1999/xlink";

		div {
			height: 20px;
			width: 100px;
		}

		.test1 { background: red; }
		@supports (content: attr(x|href)) {
			.test1 { background: green; }
		}

		.test2 { background: green; }
		@supports (content: attr(y|href)) {
			.test2 { background: red; }
		}

		.test3 { background: red; }
		@supports not (content: attr(y|href)) {
			.test3 { background: green; }
		}

		.test4 { background: red; }
		.test5 { background: green; }
		@supports (background: red) {
			x|y, .test4 { background: green; }
			y|x, .test5 { background: red; }
		}
	</style>
</head>
<body>
	<p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
	<div class="test1"></div>
	<div class="test2"></div>
	<div class="test3"></div>
	<div class="test4"></div>
	<div class="test5"></div>
</body>
</html>