<!DOCTYPE html>
<html><head>
<title>CSS Test: flex-container-margin-not-collapse-with-content-margin</title>
<link href="http://www.github.com/sskyy" rel="author" title="houzhenyu">
<link href="https://drafts.csswg.org/css-flexbox-1/#item-margins" rel="help">
<link href="reference/flex-container-margin-ref.htm" rel="match">
<meta content="The margins of adjacent flex items do not collapse." name="assert">
<style>
.flex-container{
display: flex;
margin:20px;
background: #333;
}
.flex-item{
width:50px;
height:50px;
margin:20px;
background: #eee;
}
</style>
</head>
<body>
<div class="flex-container">
<div class="flex-item"></div>
<div class="flex-item"></div>
<div class="flex-item"></div>
</div>
</body></html>