evaluateXPathToBoolean

Type: Function

How to get evaluateXPathToBoolean?

JavaScript

import evaluateXPathToBoolean from 'fontoxml-selectors/src/evaluateXPathToBoolean.js'

Evaluate an XQuery script to a boolean (using the effective boolean value property in the XPath 3.1 spec). You can also use functions defined in XQuery modules. Refer to the concept page of XQuery for details. While XQuery update facility is allowed, mutating existing nodes is not allowed. Use the execute-update-script operation to mutate the document using XQUF.

Arguments

  1. xquery

    (Required)

    The XPath to evaluate

  2. contextNode

    (Required)

    Type: Node | NULL

    The initial context of the query. If context is absent, it is still possible to evaluate some queries, like '1+1', or queries using only variables.

  3. domFacade

    (Required)

    Type: Blueprint

    The blueprint (or blueprint compatible interface) to use for this query.

  4. variables

    (Required)

    Type: Object<String, any>

    Any variables to use for this query. They will be prefixed with a '$' sign

    Default value

  5. options

    (Required)

    Type: Object<String, any>

    See https://github.com/FontoXML/fontoxpath for more info on this parameter.

    Properties

    Default value

Returns

Type: Boolean

The result of the query.