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---
title: overflow-x
slug: Web/CSS/overflow-x
translation_of: Web/CSS/overflow-x
---
<p>{{ CSSRef() }}</p>
<p>{{ SeeCompatTable() }}</p>
<h2 id="Summary" name="Summary">概述</h2>
<p><span style="line-height: inherit;">当一个块级元素的内容在水平方向发生溢出时，</span><a href="/en/CSS" style="line-height: inherit;" title="CSS">CSS</a><span style="line-height: inherit;">属性</span><span style="font-family: courier new,andale mono,monospace; line-height: inherit;">overflow-x</span><span style="line-height: inherit;">决定应该截断溢出内容，或者显示滚动条，或者直接显示溢出内容</span><span style="line-height: inherit;">。</span></p>
<p>{{cssinfo}}</p>
<h2 id="Syntax" name="Syntax">用法</h2>
<pre class="twopartsyntaxbox"><a href="/en-US/docs/CSS/Value_definition_syntax" title="CSS/Value_definition_syntax">合法值</a>: {{csssyntax("overflow-x")}}
</pre>
<pre>overflow-x: visible
overflow-x: hidden
overflow-x: scroll
overflow-x: auto
overflow-x: inherit
</pre>
<h3 id="Values" name="Values">解释</h3>
<dl>
<dt><code>visible</code></dt>
<dd>内容不会被截断，且可以显示在内容盒之外。</dd>
<dt><code>hidden</code></dt>
<dd>内容会被截断，且不会显示滚动条。</dd>
<dt><code>scroll</code></dt>
<dd>桌面浏览器总是显示滚动条，无论内容是否发生溢出。这可以避免滚动条的显示与消失所导致的元素尺寸不确定的问题。而打印机可能会打印溢出的内容。</dd>
<dt><code>auto</code></dt>
<dd>取决于浏览器本身。当内容发生溢出时，桌面浏览器如Firefox会显示滚动条。</dd>
</dl>
<h2 id="Examples" name="Examples">示例</h2>
<pre class="eval">[fixme]
</pre>
<h2 id="Specifications" name="Specifications">规范</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">规范</th>
<th scope="col">状态</th>
<th scope="col">备注 </th>
</tr>
</thead>
<tbody>
<tr>
<td>{{ SpecName('CSS3 Box', '#overflow-x', 'overflow-x') }}</td>
<td>{{ Spec2('CSS3 Box') }}</td>
<td></td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility" name="Browser_compatibility">浏览器支持</h2>
<p>{{Compat("css.properties.overflow-x")}}</p>
<h2 id="See_also" name="See_also">参见</h2>
<ul>
<li>相关CSS属性: {{ cssxref("text-overflow") }}, {{ cssxref("white-space") }}, {{ Cssxref("overflow") }}, {{ Cssxref("overflow-y") }}, {{ Cssxref("clip") }}, {{ Cssxref("display") }}</li>
</ul>
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