XPathResult.singleNodeValue - Web APIs 编辑

The read-only singleNodeValue property of the XPathResult interface returns a Node 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.

Note:

Syntax

var value = result.singleNodeValue;

Return value

The return value is the Node value of the XPathResult returned by Document.evaluate().

Exceptions

TYPE_ERR

In case XPathResult.resultType is not ANY_UNORDERED_NODE_TYPE or FIRST_ORDERED_NODE_TYPE, an XPathException of type TYPE_ERR is thrown.

Example

The following example shows the use of the singleNodeValue property.

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;

Result

Specifications