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• 特性
• 方法
• 常量
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

XPathResult interface represents the results generated by evaluating an XPath expression within the context of a given node. Since XPath expressions can result in a variety of result types, this interface makes it possible to determine and handle the type and value of the result.

特性

XPathResult.booleanValue 只读

A boolean representing the value of the result if resultType is BOOLEAN_TYPE .

XPathResult.invalidIteratorState 只读

Signifies that the iterator has become invalid. It is true if resultType is UNORDERED_NODE_ITERATOR_TYPE or ORDERED_NODE_ITERATOR_TYPE and the document has been modified since this result was returned.

XPathResult.numberValue 只读

A 编号 representing the value of the result if resultType is NUMBER_TYPE .

XPathResult.resultType 只读

A 编号 code representing the type of the result, as defined by the type constants.

XPathResult.singleNodeValue 只读

节点 representing the value of the single node result, which may be null .

XPathResult.snapshotLength 只读

The number of nodes in the result snapshot.

XPathResult.stringValue 只读

string representing the value of the result if resultType is STRING_TYPE .

方法

XPathResult.iterateNext()

If the result is a node set, this method iterates over it and returns the next node from it or null if there are no more nodes.

XPathResult.snapshotItem()

Returns an item of the snapshot collection or null in case the index is not within the range of nodes. Unlike the iterator result, the snapshot does not become invalid, but may not correspond to the current document if it is mutated.

常量

Result Type Defined Constant	值	描述
ANY_TYPE	0	A result set containing whatever type naturally results from evaluation of the expression. Note that if the result is a node-set then UNORDERED_NODE_ITERATOR_TYPE is always the resulting type.
NUMBER_TYPE	1	A result containing a single number. This is useful for example, in an XPath expression using the count() 函数。
STRING_TYPE	2	A result containing a single string.
BOOLEAN_TYPE	3	A result containing a single boolean value. This is useful for example, in an XPath expression using the not() 函数。
UNORDERED_NODE_ITERATOR_TYPE	4	A result node-set containing all the nodes matching the expression. The nodes may not necessarily be in the same order that they appear in the document.
ORDERED_NODE_ITERATOR_TYPE	5	A result node-set containing all the nodes matching the expression. The nodes in the result set are in the same order that they appear in the document.
UNORDERED_NODE_SNAPSHOT_TYPE	6	A result node-set containing snapshots of all the nodes matching the expression. The nodes may not necessarily be in the same order that they appear in the document.
ORDERED_NODE_SNAPSHOT_TYPE	7	A result node-set containing snapshots of all the nodes matching the expression. The nodes in the result set are in the same order that they appear in the document.
ANY_UNORDERED_NODE_TYPE	8	A result node-set containing any single node that matches the expression. The node is not necessarily the first node in the document that matches the expression.
FIRST_ORDERED_NODE_TYPE	9	A result node-set containing the first node in the document that matches the expression.

规范

规范	状态	注释
DOM (文档对象模型) 3 级 XPath 规范 The definition of 'XPathResult' 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. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
XPathResult	Chrome Yes	Edge ≤18	Firefox Yes	IE ?	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes
invalidIteratorState	Chrome Yes	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes
iterateNext	Chrome Yes	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes
resultType	Chrome Yes	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes
snapshotItem	Chrome Yes	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS ?	Samsung Internet Android Yes

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

另请参阅

• Document.evaluate()
• XPathExpression
• Dottoro Web Reference - XPathResult object

元数据

• 最后修改： 2019 年 3 月 23 日

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()