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Test Info:

<!doctype html>
<meta charset="utf-8">
<title>CSS Test: nested flex containers with definite max-height</title>
<link rel="match" href="flexbox-definite-sizes-001-ref.html">
<link rel="author" href="mailto:dholbert@mozilla.com" title="Daniel Holbert">
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<style>
body { overflow: hidden }
.outerFlex {
display: flex;
width: 100px;
/* Implicit "align-items:stretch" */
}
.innerFlex {
display: flex;
width: 100px;
background: red;
/* This reveals if we miscalculate the height of our flex item: */
align-items: flex-end;
}
.block {
width: 100px;
max-height: 100%;
background-color: green;
}
</style>
<p>Test passes if you see a green 100px x 100px square, and no red</p>
<div class="outerFlex">
<div class="innerFlex" style="max-height: 100px">
<div class="block"><div style="height:9999px"></div></div>
</div>
</div>