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---
title: ruby-align
slug: Web/CSS/ruby-align
translation_of: Web/CSS/ruby-align
---
<div>{{CSSRef}}{{SeeCompatTable}}</div>
<h2 id="Summary">Summary</h2>
<p>The <code><strong>ruby-align</strong></code> CSS property defines the distribution of the different ruby elements over the base.</p>
<p>{{cssinfo}}</p>
<h2 id="Syntax">Syntax</h2>
<pre class="brush:css">/* Keyword values */
ruby-align: start;
ruby-align: center;
ruby-align: space-between;
ruby-align: space-around;
/* Global values */
ruby-align: inherit;
ruby-align: initial;
ruby-align: unset;
</pre>
<h3 id="Values">Values</h3>
<dl>
<dt><code>start</code></dt>
<dd>Is a keyword indicating that the ruby will be aligned with the start of the base text.</dd>
<dt><code>center</code></dt>
<dd>Is a keyword indicating that the ruby will be aligned at the middle of the base text</dd>
<dt><code>space-between</code></dt>
<dd>Is a keyword indicating that the extra space will be distributed between the elements of the ruby.</dd>
<dt><code>space-around</code></dt>
<dd>Is a keyword indicating that the extra space will be distributed between the elements of the ruby, and around it.</dd>
</dl>
<h3 id="Formal_syntax">Formal syntax</h3>
<pre class="syntaxbox">{{csssyntax}}</pre>
<h2 id="Examples">Examples</h2>
<p>This HTML will render differently with each value of <code>ruby-align</code>:</p>
<pre class="brush: html"><ruby>
<rb>This is a long text to check</rb>
<rp>（</rp><rt>short ruby</rt><rp>）</rp>
</ruby>
</pre>
<h3 id="Ruby_aligned_at_the_start_of_the_base_text">Ruby aligned at the start of the base text</h3>
<pre class="brush: html" style="display: none;"><ruby>
<rb>This is a long text to check</rb>
<rp>（</rp><rt>short ruby</rt><rp>）</rp>
</ruby>
</pre>
<pre class="brush: css">ruby {
ruby-align:start;
}</pre>
<p>This gives the following result:</p>
<p>{{EmbedLiveSample("Ruby_aligned_at_the_start_of_the_base_text", 180, 40)}}</p>
<h3 id="Ruby_aligned_at_the_center_of_the_base_text">Ruby aligned at the center of the base text</h3>
<pre class="brush: html" style="display: none;"><ruby>
<rb>This is a long text to check</rb>
<rp>（</rp><rt>short ruby</rt><rp>）</rp>
</ruby>
</pre>
<pre class="brush: css">ruby {
ruby-align:center;
}</pre>
<p>This gives the following result:</p>
<p>{{EmbedLiveSample("Ruby_aligned_at_the_center_of_the_base_text", 180, 40)}}</p>
<h3 id="Extra_space_distributed_between_ruby_elements">Extra space distributed between ruby elements</h3>
<pre class="brush: html" style="display: none;"><ruby>
<rb>This is a long text to check</rb>
<rp>（</rp><rt>short ruby</rt><rp>）</rp>
</ruby>
</pre>
<pre class="brush: css">ruby {
ruby-align:space-between;
}</pre>
<p>This gives the following result:</p>
<p>{{EmbedLiveSample("Extra_space_distributed_between_ruby_elements", 180, 40)}}</p>
<h3 id="Extra_space_distributed_between_and_around_ruby_element">Extra space distributed between and around ruby element</h3>
<pre class="brush: html" style="display: none;"><ruby>
<rb>This is a long text to check</rb>
<rp>（</rp><rt>short ruby</rt><rp>）</rp>
</ruby>
</pre>
<pre class="brush: css">ruby {
ruby-align:space-around;
}</pre>
<p>This gives the following result:</p>
<p>{{EmbedLiveSample("Extra_space_distributed_between_and_around_ruby_element", 180, 40)}}</p>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{ SpecName('CSS3 Ruby', '#ruby-align-property', 'ruby-align') }}</td>
<td>{{ Spec2('CSS3 Ruby') }}</td>
<td>Initial definition</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility" name="Browser_compatibility">Browser compatibility</h2>
<p>{{ CompatibilityTable() }}</p>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari (WebKit)</th>
</tr>
<tr>
<td rowspan="1">Basic support</td>
<td rowspan="1">{{ CompatNo }} </td>
<td>{{CompatGeckoDesktop(38)}}</td>
<td rowspan="1">{{ CompatNo }} [1]</td>
<td rowspan="1">{{ CompatNo }} </td>
<td rowspan="1">{{ CompatNo }}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Phone</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{ CompatNo }} </td>
<td>{{CompatGeckoMobile(38)}}</td>
<td>{{ CompatNo }} [1]</td>
<td>{{ CompatNo }} </td>
<td>CompatNo</td>
</tr>
</tbody>
</table>
</div>
<p>[1] Internet Explorer, since IE9, implements an early draft of CSS Ruby where <code>ruby-align</code> had the following properties: <code>auto</code>, <code>left</code>, <code>center</code>, <code>right</code>, <code>distribute-letter</code>, <code>distribute-space</code>, and <code>line-edge</code>. Here is a rough conversion table:</p>
<table class="standard-table">
<thead>
<tr>
<th scope="col">IE syntax</th>
<th scope="col">Standard syntax</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>auto</code></td>
<td>Don't use <code>ruby-align</code></td>
</tr>
<tr>
<td><code>left</code></td>
<td>Use <code>start</code> (in ltr scripts)</td>
</tr>
<tr>
<td><code>center</code></td>
<td><code>center</code></td>
</tr>
<tr>
<td><code>right</code></td>
<td>Use <code>start</code> (in rtl scripts)</td>
</tr>
<tr>
<td><code>distribute-letter</code></td>
<td>No direct equivalent, use <code>space-between</code> or <code>space-around</code></td>
</tr>
<tr>
<td><code>distribute-space</code></td>
<td><code>space-around</code></td>
</tr>
<tr>
<td><code>line-edge</code></td>
<td>No direct equivalent.</td>
</tr>
</tbody>
</table>
<h2 id="See_also">See also</h2>
<ul>
<li>HTML Ruby elements: {{HTMLElement("ruby")}}, {{HTMLElement("rt")}}, {{HTMLElement("rp")}}, and {{HTMLElement("rtc")}}.</li>
<li>CSS Ruby properties: {{cssxref("ruby-position")}}, {{cssxref("ruby-merge")}}.</li>
</ul>
|
