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• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

只读 numberValue 特性为 XPathResult interface returns the numeric value of a result with XPathResult.resultType being NUMBER_TYPE .

注意： 此特征可用于 Web 工作者 .

句法

var value = result.numberValue;
					

返回值

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

异常

TYPE_ERR

若 XPathResult.resultType 不是 NUMBER_TYPE ， XPathException 类型 TYPE_ERR is thrown.

范例

The following example shows the use of the numberValue 特性。

HTML

<div>XPath example</div>
<div>Number of <div>s: <output></output></div>
					

JavaScript

var xpath = "count(//div)";
var result = document.evaluate(xpath, document, null, XPathResult.NUMBER_TYPE, null);
document.querySelector("output").textContent = result.numberValue;
					

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.numberValue' 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.numberValue" (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()