在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

只读 singleNodeValue 特性为 XPathResult interface returns a 节点 value or null in case no node was matched of a result with XPathResult.resultType being ANY_UNORDERED_NODE_TYPE or FIRST_ORDERED_NODE_TYPE .

注意： 此特征可用于 Web 工作者 .

句法

var value = result.singleNodeValue;
					

返回值

The return value is the 节点 value of the XPathResult 返回通过 Document.evaluate() .

异常

TYPE_ERR

若 XPathResult.resultType 不是 ANY_UNORDERED_NODE_TYPE or FIRST_ORDERED_NODE_TYPE ， XPathException 类型 TYPE_ERR is thrown.

范例

The following example shows the use of the singleNodeValue 特性。

HTML

<div>XPath example</div>
<div>Tag name of the element having the text content 'XPath example': <output></output></div>
					

JavaScript

var xpath = "//*[text()='XPath example']";
var result = document.evaluate(xpath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
document.querySelector("output").textContent = result.singleNodeValue.localName;
					

结果

规范

规范	状态	注释
DOM (文档对象模型) 3 级 XPath 规范 The definition of 'XPathResult.singleNodeValue' in that specification.	推荐	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

No compatibility data found. Please contribute data for "api.XPathResult.singleNodeValue" (depth: 1) to the MDN 兼容性数据存储库 .

元数据

• 最后修改： Mar 18, 2019

相关话题

1. XPathResult
2. 特性

   1. booleanValue
   2. invalidIteratorState
   3. numberValue
   4. resultType
   5. singleNodeValue
   6. snapshotLength
   7. stringValue
3. 方法

   1. iterateNext()
   2. snapshotItem()