---
title: CSS Positioning
slug: Web/CSS/CSS_Positioning
translation_of: Web/CSS/CSS_Positioning
---
<p>{{CSSRef}}</p>

<p><strong>CSS Positioning</strong> 是一个CSS模块，用来定义如何将元素在页面中进行绝对定位和相对定位。</p>

<h2 id="参考">参考</h2>

<h3 id="CSS_属性">CSS 属性</h3>

<div class="index">
<ul>
 <li>{{cssxref("bottom")}}</li>
 <li>{{cssxref("clear")}}</li>
 <li>{{cssxref("display")}}</li>
 <li>{{cssxref("float")}}</li>
 <li>{{cssxref("left")}}</li>
 <li>{{cssxref("position")}}</li>
 <li>{{cssxref("right")}}</li>
 <li>{{cssxref("top")}}</li>
 <li>{{cssxref("visibility")}}</li>
 <li>{{cssxref("z-index")}}</li>
</ul>
</div>

<h2 id="向导">向导</h2>

<dl>
 <dt><a href="/en-US/docs/Web/CSS/CSS_Positioning/Understanding_z_index">理解 CSS z-index</a></dt>
 <dd>通过几个例子来展现上下文叠加的概念以及解释z-ordering是如何工作的.</dd>
</dl>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">规范</th>
   <th scope="col">状态</th>
   <th scope="col">注释</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{ SpecName('CSS3 Positioning') }}</td>
   <td>{{ Spec2('CSS3 Positioning') }}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{ SpecName('CSS2.1', 'visuren.html') }}</td>
   <td>{{ Spec2('CSS2.1') }}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>性能</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari (WebKit)</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>1.0</td>
   <td>{{ CompatGeckoDesktop("1") }}</td>
   <td>5.0</td>
   <td>6.0</td>
   <td>1.0 (85)</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 Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>1.0</td>
   <td>{{ CompatGeckoMobile("1") }}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>