XPathResult: numberValue property

The read-only numberValue property of the XPathResult interface returns the numeric value of a result with XPathResult.resultType being NUMBER_TYPE.

Value

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

Exceptions

TYPE_ERR

In case XPathResult.resultType is not NUMBER_TYPE, a DOMException of type TYPE_ERR is thrown.

Examples

The following example shows the use of the numberValue property.

HTML

<div>XPath example</div>
<div>Number of &lt;div&gt;s: <output></output></div>

JavaScript

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

Result

Specifications

• DOM