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<?xml version="1.0" encoding="UTF-8"?>
<!--
Any copyright is dedicated to the Public Domain.
-->
<!-- Reference case for absolutely positioned flex container & children. -->
<head>
<style>
div.containingBlock {
top: 15px;
left: 20px;
height: 400px;
position: absolute;
border: 2px dashed purple;
}
.abspos {
position: absolute;
left: 5px;
border: 2px dotted black;
}
div.flexbox {
top: 30px;
left: 40px;
width: 200px;
height: 100px;
position: absolute;
border: 1px solid black;
}
div.a {
width: 30px;
height: 100px;
background: lightgreen;
display: inline-block;
}
div.b {
width: 100%;
height: 100px;
background: yellow;
display: inline-block;
}
</style>
</head>
<body>
<div class="containingBlock">
<div class="flexbox"
><div class="a abspos"/><div class="b"/></div>
</div>
</body>
</html>