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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: Node.nodeValue
+slug: Web/API/Node/nodeValue
+tags:
+ - API
+ - DOM
+ - Node
+ - Property
+translation_of: Web/API/Node/nodeValue
+---
+<p>{{APIRef("DOM")}}</p>
+
+<p>{{domxref("Node")}} 的 <code><strong>nodeValue</strong></code> 属性返回或设置当前节点的值。</p>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox"><var>str</var> = <var>node</var>.nodeValue;
+<em>node</em>.nodeValue = <em>str</em>;
+</pre>
+
+<p>value是一个包含当前节点的值的字符串(如果有的话)。</p>
+
+<h3 id="Notes" name="Notes">值</h3>
+
+<p>对于文档节点来说, <code>nodeValue</code>返回<code>null</code>. 对于text, comment, 和 CDATA 节点来说, <code>nodeValue返回该节点的文本内容</code>. 对于 attribute 节点来说, 返回该属性的属性值.</p>
+
+<p>下表就是不同类型的节点所返回的该属性的值.</p>
+
+<table>
+ <thead>
+ <tr>
+ <th scope="col">Node</th>
+ <th scope="col">Value of nodeValue</th>
+ </tr>
+ </thead>
+ <tbody>
+ </tbody>
+ <tbody>
+ <tr>
+ <td>{{domxref("CDATASection")}}</td>
+ <td>CDATA的文本内容</td>
+ </tr>
+ <tr>
+ <td>{{domxref("Comment")}}</td>
+ <td>注释的文本内容</td>
+ </tr>
+ <tr>
+ <td>{{domxref("Document")}}</td>
+ <td>null</td>
+ </tr>
+ <tr>
+ <td>{{domxref("DocumentFragment")}}</td>
+ <td>null</td>
+ </tr>
+ <tr>
+ <td>{{domxref("DocumentType")}}</td>
+ <td>null</td>
+ </tr>
+ <tr>
+ <td>{{domxref("Element")}}</td>
+ <td>null</td>
+ </tr>
+ <tr>
+ <td>{{domxref("NamedNodeMap")}}</td>
+ <td>null</td>
+ </tr>
+ <tr>
+ <td>{{domxref("EntityReference")}}</td>
+ <td>null</td>
+ </tr>
+ <tr>
+ <td>{{domxref("Notation")}}</td>
+ <td>null</td>
+ </tr>
+ <tr>
+ <td>{{domxref("ProcessingInstruction")}}</td>
+ <td>整个标签的文本内容</td>
+ </tr>
+ <tr>
+ <td>{{domxref("Text")}}</td>
+ <td>文本节点的内容</td>
+ </tr>
+ </tbody>
+</table>
+
+<p>如果<code>nodeValue的值为</code><code>null</code>,则对它赋值也不会有任何效果.</p>
+
+<h2 id="Specification" name="Specification">规范</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{SpecName("DOM WHATWG", "#dom-node-nodevalue", "Node: nodeValue")}}</td>
+ <td>{{Spec2("DOM WHATWG")}}</td>
+ <td></td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("api.Node.nodeValue")}}</p>