postcss-critical-split/testsuite/modules-media-queries/output.css

A PostCSS plugin that takes existing CSS files and splits out the annotated critical styles into a seperate file.

body {
	background-color: black;
}

p {
	color: red;
}

@media screen and (min-width: 400px) {
	p {
		display: inline-block;
		border: red thin solid;
	}

	div {
		float: left;
	}

	div::before {
		display: table;
	}
}

@media screen and (min-width: 500px) {
	div {
		float: left;
	}
}

span {
	display: inline-block;
	color: #333;
}