css/mediaqueries/mq-calc-004.html

<!doctype html>
<html>
	<head>
		<title>Test: evaluation of ch in calc in Media Queries</title>
		<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">
		<link rel="help" href="http://www.w3.org/TR/css3-values/#calc-notation">
		<link rel="help" href="http://www.w3.org/TR/css3-mediaqueries/#units">
		<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
		<meta name="assert" content="The size in pixels of the 'ch' unit used in calc inside a media query does not depend on declarations and use the initial value.">
		<style>
			:root { font-size: 30000px; }
			p { font-size: 16px; }
			div {
				width: 100px;
				height: 100px;
				background-color: red;
			}
	</style>
	</head>
	<body>
		<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
		<div></div>
		<script>
		  document.body.offsetTop;
		</script>
		<style>
			@media (min-width: calc(1ch)){
				div { background-color: green; }
			}
		</style>
	</body>
</html>