css/css-flexbox/flexbox_visibility-collapse.html

<!DOCTYPE html>
<title>flexbox | visibility: collapse</title>
<link rel="author" href="http://opera.com" title="Opera Software">
<link rel="help"
	href="http://www.w3.org/TR/css-flexbox-1/#visibility-collapse">
<link rel="match" href="flexbox_visibility-collapse-ref.html">
<style>
body {
	margin: 0;
}
div {
	background: #3366cc;
	border: 1px solid black;
	display: flex;
}
p {
	background: #ffcc00;
	margin: 2em;
}
#test {
	background: red;
	visibility: collapse;
}
</style>

<div>
	<p>filler</p>
	<p id="test">FAIL</p>
	<p>filler</p>
</div>