vue/prop-name-casing - ignoreProps not working

[DonRedwoood]

Checklist

• I have tried restarting my IDE and the issue persists.
• I have read the FAQ and my problem is not listed.

Tell us about your environment

• ESLint version: 9.20.1
• eslint-plugin-vue version: 9.32.0
• Vue version: 3.5.13
• Node version: 20.9.0
• Operating System: Windows 11

Please show your full configuration:

// @ts-check
import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';
import pluginVue from 'eslint-plugin-vue';
import stylistic from '@stylistic/eslint-plugin';

export default tseslint.config(
  eslint.configs.recommended,
  tseslint.configs.recommended,
  pluginVue.configs['flat/recommended'],
  {
    files   : ['**/*.js', '**/*.ts', '**/*.vue'],
    ignores : ['**/vendor/*.js', '**/vendor/*.ts', 'vite.config.ts'],
    plugins : {
      'typescript-eslint' : tseslint.plugin,
      '@stylistic'        : stylistic,
    },
    languageOptions : {
      parserOptions : {
        parser              : tseslint.parser,
        project             : './tsconfig.json',
        projectService      : true,
        extraFileExtensions : ['.vue'],
        sourceType          : 'module',
      },
    },
  },
  {
    plugins : {
      '@stylistic' : stylistic,
    },
    rules : {
      '@stylistic/indent' : [
        'error',
        2,
        {
          'ignoredNodes' : [
            'Program > *',         // Ignore top-level indentation for <script> tags in Vue files
            'TemplateLiteral > *', // Ignore top-level indentation for <template> tags in Vue files
          ],
          'outerIIFEBody'      : 'off',
          'SwitchCase'         : 1,
          'VariableDeclarator' : {
            'const' : 1,
            'let'   : 1,
            'var'   : 1,
          }
        }
      ],
      '@typescript-eslint/no-empty-function'    : 'off',
      '@typescript-eslint/no-empty-object-type' : 'off',
      '@typescript-eslint/no-explicit-any'      : 'off',
      '@typescript-eslint/no-unused-vars'       : [
        'error',
        {
          'args'              : 'after-used',
          'argsIgnorePattern' : '^_',
        },
      ],
      '@typescript-eslint/no-var-requires' : 'off',
      'arrow-parens'                       : ['error', 'always'],
      'arrow-spacing'                      : 'error',
      'comma-dangle'                       : [
        'error',
        {
          'arrays'    : 'only-multiline',
          'exports'   : 'never',
          'functions' : 'never',
          'imports'   : 'never',
          'objects'   : 'only-multiline',
        }
      ],
      'key-spacing' : [
        2,
        {
          'afterColon'  : true,
          'align'       : 'colon',
          'beforeColon' : true,
          'mode'        : 'minimum',
        },
      ],
      'linebreak-style'              : ['error', 'unix'],
      'newline-after-var'            : 'off',
      'newline-before-return'        : 'off',
      'no-cond-assign'               : 'off',
      'no-console'                   : 'off',
      'no-const-assign'              : ['error'],
      'no-extra-semi'                : 'off',
      'no-prototype-builtins'        : 'off',
      'no-trailing-spaces'           : 'error',
      'no-undef'                     : 'off',
      'no-unused-vars'               : 'off',
      'no-var'                       : 'off',
      'one-var'                      : 'off',
      'one-var-declaration-per-line' : 'off',
      'quotes'                       : [
        'warn',
        'single',
        {
          'allowTemplateLiterals' : true,
        },
      ],
      'semi'                        : 'warn',
      'space-before-function-paren' : ['error', 'never'],
      'space-in-parens'             : ['error', 'never'],
      'space-unary-ops'             : [
        2,
        {
          'nonwords' : true,
          'words'    : true,
        },
      ],
      'vue/component-name-in-template-casing' : ['error','kebab-case'],
      'vue/component-options-name-casing'     : ['error', 'kebab-case'],
      'vue/html-closing-bracket-newline'      : [
        'error',
        {
          'multiline'  : 'never',
          'singleline' : 'never',
        },
      ],
      'vue/html-indent' : [
        'error',
        2,
        {
          'alignAttributesVertically' : true,
          'attribute'                 : 1,
          'baseIndent'                : 1,
          'closeBracket'              : 0,
          'ignores'                   : [],
        },
      ],
      'vue/multi-word-component-names'             : 'off',
      'vue/multiline-html-element-content-newline' : [
        'error',
        {
          'allowEmptyLines' : true,
          'ignores'         : [
            'a',
            'pre',
            'router-link',
            'span',
            'textarea',
          ],
        },
      ],
      'vue/prop-name-casing' : ['error', 'camelCase', {
        'ignoreProps' : ['aria-hidden'],
      }],
      'vue/no-unused-vars'       : 'off',
      'vue/require-default-prop' : 'off',
      'vue/require-prop-types'   : 'off',
      'vue/require-v-for-key'    : 'off',
    },
  },
  {
    files : ['**/*.vue'],
    rules : {
      indent : 'off',
    },
  }
);

What did you do?

      'vue/prop-name-casing' : ['error', 'camelCase', {
        'ignoreProps' : ['aria-hidden'],
      }],

What did you expect to happen?

The rule above breaks ESLint. I ideally want all props that start with aria- to be permitted but to simplify the issue I removed my regex attempt. The moment I add the the options object with 'ignoreProps' and restart ESLint, it stops working. With the { 'ignoreProps': '...' } options removed, it works again.

$ npx eslint .

Oops! Something went wrong! :(

ESLint: 9.20.1

Error: Key "rules": Key "vue/prop-name-casing":
        Value ["camelCase",{"ignoreProps":["aria-hidden"]}] should NOT have more than 1 items.

[DonRedwoood]

I did some browsing of the eslint-plugin-vue codebase and it looks like the reason this isn't working is because it's a new feature, so what's listed in the official documentation hasn't actually made it to an official release yet. Naturally it's my luck to use a brand-new feature based on documentation. 🤦‍♂️