css/CSS2/positioning/absolute-non-replaced-max-001.html

<!doctype html>
<meta charset="utf-8">
<title>CSS Test: ‘max-width’ and ‘max-height’ affect percentage sizes in descendants</title>
<link rel="author" name="Delan Azabani" href="mailto:dazabani@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css2/#min-max-widths">
<link rel="help" href="https://drafts.csswg.org/css2/#min-max-heights">
<link rel="match" href="absolute-non-replaced-max-001-ref.html">
<meta name="assert" value="This test verifies that when the used ‘width’ and ‘height’ are affected by ‘max-width’ and ‘max-height’, the descendants are laid out with a containing block of the new size, so any percentage sizes are resolved against that new size.">
<p>Test passes if there is a green square containing a smaller black square below.
<div style="position: absolute; width: 4em; height: 4em; max-width: 2em; max-height: 2em; background: green;">
    <div style="width: 50%; height: 50%; background: black;"></div>
</div>