---
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>

{{Compat("api.Node.ownerDocument")}}