---
title: Node.ownerDocument
slug: Web/API/Node/ownerDocument
tags:
  - API
  - DOM
  - Gecko
  - Property
  - 属性
translation_of: Web/API/Node/ownerDocument
---
<div>{{ APIRef("DOM")}}</div>

<p><strong>Node.ownerDocument </strong>只读属性会返回当前节点的顶层的 document 对象。</p>

<h2 id="Syntax" name="Syntax">语法</h2>

<pre class="eval"><em>document</em> = node.ownerDocument
</pre>

<ul>
 <li><code>document</code> 是当前元素的 <a href="https://developer.mozilla.org/zh-CN/docs/DOM/document"><code>document</code></a> 对象，其是当前元素的祖先。</li>
</ul>

<h2 id="Example" name="Example">例子</h2>

<pre>// 得到p元素所在文档的HTML节点
d = p.ownerDocument;
html = d.documentElement;
</pre>

<h2 id="Notes" name="Notes">注意</h2>

<p><code>被此属性返回的 document</code> 对象是在实际的HTML文档中的所有子节点所属的主对象<code>。如果在文档节点自身上使用此属性，则结果是null</code>。</p>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th>Specification</th>
   <th>Status</th>
   <th>Comment</th>
  </tr>
  <tr>
   <td>{{SpecName("DOM4", "#dom-node-ownerdocument", "Node.ownerDocument")}}</td>
   <td>{{Spec2("DOM4")}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName("DOM3 Core", "core.html#node-ownerDoc", "Node.ownerDocument")}}</td>
   <td>{{Spec2("DOM3 Core")}}</td>
   <td>No change</td>
  </tr>
  <tr>
   <td>{{SpecName("DOM2 Core", "core.html#node-ownerDoc", "Node.ownerDocument")}}</td>
   <td>{{Spec2("DOM2 Core")}}</td>
   <td>Initial definition</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>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{ CompatVersionUnknown() }}</td>
   <td>{{ CompatVersionUnknown() }}<sup>[1]</sup></td>
   <td>6.0<sup>[2]</sup></td>
   <td>{{ CompatVersionUnknown() }}</td>
   <td>{{ CompatVersionUnknown() }}</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>{{ CompatUnknown() }}</td>
   <td>{{ CompatUnknown() }}<sup>[1]</sup></td>
   <td>{{ CompatUnknown() }}</td>
   <td>{{ CompatUnknown() }}</td>
   <td>{{ CompatUnknown() }}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] 从 Gecko 9.0 {{ geckoRelease("9.0") }} 开始, <code>一个由脚本生成的</code>DocumentType类型的节点(节点类型{{ domxref("Node.nodeType") }}的值为 <code>Node.DOCUMENT_TYPE_NODE</code> 也就是 10)的<code>ownerDocument</code>属性的值不再是null. 而是调用<a href="/zh-cn/DOM/DOMImplementation.createDocumentType" title="zh-cn/DOM/DOMImplementation.createDocumentType"><code>document.implementation.createDocumentType()</code></a> 方法创建该节点的文档节点.</p>

<p>[2] <a href="http://msdn.microsoft.com/en-us/library/ie/ms534315(v=vs.85).aspx">http://msdn.microsoft.com/en-us/library/ie/ms534315(v=vs.85).aspx</a></p>