XPathExpression

XPath xpath

Baseline: Widely available on the web, in every major browser since Jul 2015, and long enough to count on (since Jan 2018).

niso: Partial 98%. 1146 of 1166 subtests pass, by system: Linux 98%, macOS 98%. Engines: QuickJS, the engine niso's WPT run uses; Node and Porffor have no recorded run. WPT results recorded at f3b4fa8, 2026-11-10; web-features 3.45.0. WPT tests · niso's support · Document, XPathEvaluator, XPathExpression, XPathResult

XPathExpression is an interface in idl/xpath.webidl, exposed in Window. What it does is on MDN; this page says what niso has of it.

Status

The web features its members belong to, each with its Baseline status on the web and how much of the feature’s WPT suite passes in niso (see Web platform support).

Feature	On the web	In niso	Members
XPath	Widely available	Partial 98% 1146 of 1166 subtests pass	2

Members

evaluate()

operation

XPathResult evaluate(Node contextNode, optional unsigned short type = 0, optional XPathResult? result = null);

int32_t niso_x_path_expression_evaluate(niso_dom* dom, niso_handle self, niso_handle context_node, uint16_t type, niso_handle result, niso_handle* out);