k8s-set-context/node_modules/xpath/docs/XPathEvaluator.md

XPathEvaluator

The xpath.parse() method returns an XPathEvaluator, which contains the following methods.

Each of these methods takes an optional options object, which can contain any of the following properties:

namespaces - a namespace resolver. See the documentation page for details.

variables - a variable resolver. See the documentation page for details.

functions - a function resolver. See the documentation page for details.

node - the context node for evaluating the expression

Example usage:

var evaluator = xpath.parse('/characters/character[@greeting = $greeting]');
var character = evaluator.select1({
    node: myCharacterDoc,
    variables: {
        greeting: "Hello, I'm Harry, Harry Potter."
    }
});

XPathEvaluator methods

evaluate([options])

Evaluates the XPath expression and returns the result. The resulting type is determined based on the type of the expression, using the same criteria as xpath.select.

evaluateNumber([options])

Evaluates the XPath expression and returns the result as a number.

evaluateString([options])

Evaluates the XPath expression and returns the result as a string.

evaluateBoolean([options])

Evaluates the XPath expression and returns the result as a boolean value.

evaluateNodeSet([options])

Evaluates the XPath expression and returns the result as an XNodeSet. See the documentation page for details on this interface.

This is only valid for expressions that evaluate to a node set.

select([options])

Evaluates the XPath expression and returns an array of the resulting nodes, in document order.

This is only valid for expressions that evaluate to a node set.

select1([options])

Evaluates the XPath expression and the first node in the resulting node set, in document order. Returns undefined

This is only valid for expressions that evaluate to a node set.