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XPathResult.resultType - Web APIs 编辑

The read-only resultType property of the XPathResult interface represents the type of the result, as defined by the type constants.

Note:

This feature is available in Web Workers.

Syntax

var resultType = result.resultType;

Return value

An integer value representing the type of the result, as defined by the type constants.

Constants

Result Type Defined Constant	Value	Description
`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()` function.
`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()` function.
`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.

Example

The following example shows the use of the resultType property.

HTML

<div>XPath example</div>
<div>Is XPath result a node set: <output></output></div>

JavaScript

var xpath = "//div";
var result = document.evaluate(xpath, document, null, XPathResult.ANY_TYPE, null);
document.querySelector("output").textContent =
  result.resultType >= XPathResult.UNORDERED_NODE_ITERATOR_TYPE &&
  result.resultType <= XPathResult.FIRST_ORDERED_NODE_TYPE;

Result

Specifications

Specification	Status	Comment
Document Object Model (DOM) Level 3 XPath Specification The definition of 'XPathResult.resultType' in that specification.	Recommendation	Initial definition