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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: dimension
+slug: Web/CSS/dimension
+tags:
+ - CSS
+ - CSS数据类型
+translation_of: Web/CSS/dimension
+---
+<div>{{CSSRef}}</div>
+
+<p><strong><code>&lt;dimension&gt;</code></strong> <a href="/zh-CN/docs/Web/CSS">CSS</a> <a href="/zh-CN/docs/Web/CSS/CSS_Types">数据类型</a>是一个带有单位的{{CSSxRef("&lt;number&gt;")}},例如:<code>10px</code></p>
+
+<p>CSS使用度量值来描述距离 ({{CSSxRef("&lt;length&gt;")}}),时间({{CSSxRef("&lt;time&gt;")}}),频率({{CSSxRef("&lt;frequency&gt;")}}),分辨率({{CSSxRef("&lt;resolution&gt;")}})以及其他量。</p>
+
+<h2 id="格式">格式</h2>
+
+<p> <code>&lt;dimension&gt;</code> 的格式是一个{{CSSxRef("&lt;number&gt;")}}后紧随一个是标记符的单位,单位大小写不敏感。</p>
+
+<h2 id="Examples">Examples</h2>
+
+<h3 id="合法的度量值">合法的度量值</h3>
+
+<pre class="syntaxbox example-good">12px 12像素
+1rem 1 rem
+1.2pt 1.2点
+2200ms 2200毫秒
+200hz 200赫兹
+200Hz 200赫兹(单位大小写不敏感)
+</pre>
+
+<h3 id="非法的度量值">非法的度量值</h3>
+
+<pre class="syntaxbox example-bad">12 px 单位必须紧随数字,不能有空格
+12"px" 单位是标识符,不能加引号</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">状态</th>
+ <th scope="col">说明</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{SpecName("CSS4 Values", "#dimensions", "&lt;dimension&gt;")}}</td>
+ <td>{{Spec2("CSS4 Values")}}</td>
+ <td>添加 <code>cap</code>, <code>ic</code>, <code>lh</code>, <code>rlh</code>, <code>vi</code>, <code>vb</code></td>
+ </tr>
+ <tr>
+ <td>{{SpecName("CSS3 Values", "#dimensions", "&lt;dimension&gt;")}}</td>
+ <td>{{Spec2("CSS3 Values")}}</td>
+ <td>添加 <code>ch</code>, <code>rem</code>, <code>vw</code>, <code>vw</code>, <code>vmin</code>,<code> vmax</code>, <code>Q</code></td>
+ </tr>
+ <tr>
+ <td>{{SpecName("CSS2.1", "syndata.html#numbers", "&lt;dimension&gt;")}}</td>
+ <td>{{Spec2("CSS2.1")}}</td>
+ <td>Defined under Numbers and Length</td>
+ </tr>
+ <tr>
+ <td>{{SpecName("CSS1", "", "&lt;dimension&gt;")}}</td>
+ <td>{{Spec2("CSS1")}}</td>
+ <td>Initial definition under "length units"</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("css.types.dimension")}}</p>