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• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

只读 snapshotLength 特性为 XPathResult interface represents the number of nodes in the result snapshot.

注意： 此特征可用于 Web 工作者 .

句法

var snapshotLength = result.snapshotLength;
					

返回值

An integer value representing the number of nodes in the result snapshot.

异常

TYPE_ERR

若 XPathResult.resultType 不是 UNORDERED_NODE_SNAPSHOT_TYPE or ORDERED_NODE_SNAPSHOT_TYPE ， XPathException 类型 TYPE_ERR is thrown.

范例

The following example shows the use of the snapshotLength 特性。

HTML

<div>XPath example</div>
<div>Number of matched nodes: <output></output></div>
					

JavaScript

var xpath = "//div";
var result = document.evaluate(xpath, document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
document.querySelector("output").textContent = result.snapshotLength;
					

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.snapshotLength' 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.snapshotLength" (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()