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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: padding-left
+slug: Web/CSS/padding-left
+translation_of: Web/CSS/padding-left
+---
+<div>{{CSSRef}}</div>
+
+<p>CSS属性 <code><strong>padding-left</strong></code> 是指一个元素在内边距区域(padding area)中左边的宽度。内边距(padding)是指一个元素的内容和边框之间的区域。</p>
+
+<div>{{EmbedInteractiveExample("pages/css/padding-left.html")}}</div>
+
+
+
+<p>元素的“填充区域”是其内容和边框之间的空间。</p>
+
+<div class="note">
+<p><strong>贴士:</strong> {{cssxref("padding")}} 属性可用于通过一个声明在元素的四个边(上、下、左、右)上设置填充。</p>
+</div>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="brush:css no-line-numbers notranslate">/* 长度单位参数 */
+padding-left: 0.5em;
+padding-left: 0;
+padding-left: 2cm;
+
+/* 百分数参数 */
+padding-left: 10%;
+
+/* 全局参数 */
+padding-left: inherit;
+padding-left: initial;
+padding-left: unset;
+</pre>
+
+<p><code>padding left</code>属性指定为从下表中选择的单个值。与外边距(margins)不同,可以接受的值不允许是负数。</p>
+
+<h3 id="Values" name="Values">参数</h3>
+
+<dl>
+ <dt>{{cssxref("&lt;length&gt;")}}</dt>
+ <dd>填充内边距的长度。它必须是非负的。</dd>
+ <dt>{{cssxref("&lt;percentage&gt;")}}</dt>
+ <dd>以与父级盒子的百分比表示的填充大小。它也必须是非负的。</dd>
+</dl>
+
+<h2 id="标准定义">标准定义</h2>
+
+<p>{{cssinfo}}</p>
+
+<h2 id="标准语法">标准语法</h2>
+
+<pre class="syntaxbox notranslate">{{csssyntax}}</pre>
+
+<h2 id="样例">样例</h2>
+
+<h3 id="使用“px”单位和百分比设置_padding-left的样例">使用“px”单位和百分比设置 padding-left的样例</h3>
+
+<pre class="brush: css notranslate">.content { padding-left: 5%; }
+.sidebox { padding-left: 10px; }
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">规范版本</th>
+ <th scope="col">阶段</th>
+ <th scope="col">备注</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{ SpecName('CSS3 Box', '#propdef-padding-left', 'padding-left') }}</td>
+ <td>{{ Spec2('CSS3 Box') }}</td>
+ <td>没有改变</td>
+ </tr>
+ <tr>
+ <td>{{ SpecName('CSS2.1', 'box.html#padding-properties', 'padding-left') }}</td>
+ <td>{{ Spec2('CSS2.1') }}</td>
+ <td>没有改变</td>
+ </tr>
+ <tr>
+ <td>{{ Specname('CSS1', '#padding-left', 'padding-left') }}</td>
+ <td>{{ Spec2('CSS1') }}</td>
+ <td>初始定义</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("css.properties.padding-left")}}</p>
+
+<h2 id="另见">另见</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/CSS/CSS_Box_Model/Introduction_to_the_CSS_box_model">Introduction to the CSS basic box model</a></li>
+ <li>{{cssxref("padding-top")}}, {{cssxref("padding-right")}}, {{cssxref("padding-bottom")}} and the {{cssxref("padding")}} shorthand</li>
+ <li>The mapped logical properties: {{cssxref("padding-block-start")}}, {{cssxref("padding-block-end")}}, {{cssxref("padding-inline-start")}}, and {{cssxref("padding-inline-end")}} and the shorthands {{cssxref("padding-block")}} and {{cssxref("padding-inline")}}</li>
+</ul>