Do not abort parsing for unregistered <ns-prefix> in <attribute-selector>

Author: cdoublev

lib/parse/postprocess.js

@@ -6,7 +6,7 @@ import * as pseudos from '../values/pseudos.js'
 import { add as addTypes, dimensionTypes, getCalculationType, matchNumericType } from './types.js'
 import { angle, filter, keyword, list, map, number, omitted, string } from '../values/value.js'
 import { auto, notAll } from '../values/defaults.js'
-import { findFunction, findSibling, getDeclaration, getDeclarationName, getFunctionName, getRule, getRuleName, isDeclaredBy, isProducedBy } from '../utils/context.js'
+import { findFunction, findSibling, getBlock, getDeclaration, getDeclarationName, getFunctionName, getProduction, getRule, getRuleName, isDeclaredBy, isProducedBy } from '../utils/context.js'
 import { getDeclarationDefinition, parseDeclarationValue, parseGrammar } from './parser.js'
 import { isBlock, isCalculation, isComputationallyIndependent, isFailure, isFunction, isList, isOmitted, isWhitespace } from '../utils/value.js'
 import { isHexadecimal, isIdentifierCharacter, isWhitespace as isWhitespaceCharacter, toLowerCase } from '../utils/string.js'
@@ -1275,6 +1275,10 @@ function postParseNSPrefix(prefix, node) {
     if (isOmitted(name) || node.context.globals.get('namespaces').has(name.value)) {
         return prefix
     }
+    const block = getBlock(node)
+    if (block && getProduction(block)?.definition.name === '<attribute-selector>') {
+        return
+    }
     return error(node)
 }
 

lib/utils/context.js

@@ -115,6 +115,14 @@ export function findSibling({ context, parent }, accept, abort, climb) {
     return null
 }
 
+/**
+ * @param {object} node
+ * @returns {object|undefined}
+ */
+export function getBlock(node) {
+    return findContext(node, node => node.definition.type === 'block')
+}
+
 /**
  * @param {object} node
  * @returns {object|undefined}

test/value.js

@@ -2425,6 +2425,9 @@ describe('<attr-matcher>', () => {
     test('representation', () => {
         assert.representation('<attr-matcher>', '=', list([omitted, delimiter('=')], '', ['<attr-matcher>']))
     })
+    test('valid', () => {
+        assert.valid('<attribute-selector>', '[attr|=value]')
+    })
 })
 describe('<attr-name>', () => {
     test('invalid', () => {