<meta charset="utf-8">

<title>CSS Values and Units Test: support for the ch unit</title>

<link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/">

<link rel="help" href="https://drafts.csswg.org/css-values-3/#font-relative-lengths">

<link rel="match" href="reference/ch-unit-001-ref.html">

<meta name="assert" content="In vertical sideways, The ch unit is equal to the used horizontal advance measure of the 0 (ZERO, U+0030) glyph found in the font used to render it.">

<meta name="fuzzy" content="maxDifference=0-28; totalPixels=0-9">

span {

background: green;

color: green;

left: 0; right: 0;

position: absolute;

div {

background: red;

color: red;

position: relative;

height: 5ch;

width: 10ch;

writing-mode: vertical-rl;

text-orientation: sideways;

div + div {

height: auto;

div + div span {

height: 5ch;

<p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>

<div><span>00000</span></div>

<div><span></span>00000</div>