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---
title: tab-size
slug: Web/CSS/tab-size
tags:
- CSS
- 参考
translation_of: Web/CSS/tab-size
---
<div>{{CSSRef}}{{SeeCompatTable}}</div>
<p>CSS 属性<strong> <code>tab-size</code></strong> 用于自定义制表符 (<code>U+0009</code>) 的宽度。</p>
<pre class="brush:css no-line-numbers">/* <integer> values */
tab-size: 4;
tab-size: 0;
/* <length> values */
tab-size: 10px;
tab-size: 2em;
/* Global values */
tab-size: inherit;
tab-size: initial;
tab-size: unset;
</pre>
<p>{{CSSInfo}}</p>
<h2 id="语法">语法</h2>
<h3 id="值">值</h3>
<dl>
<dt>{{CSSxRef("<integer>")}}</dt>
<dd>制表符对应的空格数。必须为非负值。</dd>
<dt>{{CSSxRef("<length>")}}</dt>
<dd>制表符的宽度。必须为非负值。</dd>
</dl>
<h3 id="正式语法">正式语法</h3>
{{CSSSyntax}}
<h2 id="示例">示例</h2>
<pre class="brush: css">pre {
tab-size: 4; /* 将制表符宽度设为 4 个空格 */
}
</pre>
<pre class="brush: css">pre {
tab-size: 0; /* 移除缩进效果 */
}
</pre>
<pre class="brush: css">pre {
tab-size: 2; /* 将制表符宽度设为 2 个空格 */
}
</pre>
<h3 id="在线演示">在线演示</h3>
<p>本示例比较了默认制表符宽度和自定义制表符宽度。注意 {{cssxref("white-space")}} 被设置为 <code>pre</code> 以防止制表符收起。</p>
<h4 id="HTML">HTML</h4>
<pre class="brush: html"><p>no tab</p>
<p>&#0009;default tab size of 8 spaces</p>
<p class="custom">&#0009;custom tab size of 3 spaces</p>
<p>&nbsp;&nbsp;&nbsp;3 spaces, equivalent to the custom tab size</p>
</pre>
<h4 id="CSS">CSS</h4>
<pre class="brush: css">p {
white-space: pre;
}
.custom {
-moz-tab-size: 3;
tab-size: 3;
}</pre>
<h4 id="结果">结果</h4>
<p>{{EmbedLiveSample('Live_sample')}}</p>
<h2 id="规范">规范</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 Text', '#tab-size-property', 'tab-size')}}</td>
<td>{{Spec2('CSS3 Text')}}</td>
<td>Initial definition</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{Compat("css.properties.tab-size")}}</p>
<h2 id="参见">参见</h2>
<ul>
<li><a class="external" href="https://lists.w3.org/Archives/Public/www-style/2008Dec/0009.html"><cite>Controlling size of a tab character (U+0009)</cite></a>,Anne van Kesteren 发送给 CSSWG 的一封电子邮件。</li>
</ul>
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