<!DOCTYPE html>
<title>flexbox | flexitem margin collapsing</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_margin-collapse-ref.html">
<style>
body {
	margin: 0;
}
div {
	background: blue;
	border: 1px solid black;
	display: flex;
	flex-direction: column;
}
p {
	margin: 1em 0;
}
</style>

<div>
	<p>damer</p>
	<p>damer</p>
</div>