eslint.config.js

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import { createConfigForNuxt } from '@nuxt/eslint-config/flat';
import pluginVueA11y from 'eslint-plugin-vuejs-accessibility';

export default createConfigForNuxt({
  plugins: {
    'vuejs-accessibility': pluginVueA11y,
  },
  rules: {
    'vue/html-self-closing': [
      'off',
      {
        html: {
          void: 'any',
          normal: 'any',
          component: 'any',
        },
      },
    ],
    'vue/v-on-event-hyphenation': 'off',
    '@typescript-eslint/no-explicit-any': 'error',
    '@typescript-eslint/ban-ts-comment': 'off',
    'no-unused-vars': [
      'error',
      {
        vars: 'all',
        args: 'after-used',
        ignoreRestSiblings: true,
        argsIgnorePattern: '^_',
        varsIgnorePattern: '^_',
      },
    ],
    '@typescript-eslint/no-unused-vars': [
      'error',
      {
        vars: 'all',
        args: 'after-used',
        ignoreRestSiblings: true,
        argsIgnorePattern: '^_',
        varsIgnorePattern: '^_',
      },
    ],
    '@typescript-eslint/consistent-type-imports': [
      'error',
      {
        prefer: 'type-imports',
        fixStyle: 'separate-type-imports',
      },
    ],
    // Prevent unsafe array access patterns that can cause SSR crashes
    // This rule catches patterns like: obj?.prop.length (without optional chaining on .length)
    'no-unsafe-optional-chaining': [
      'error',
      {
        disallowArithmeticOperators: true,
      },
    ],
    // Accessibility rules
    'vuejs-accessibility/alt-text': [
      'error',
      {
        elements: ['img', 'object', 'area', 'input[type="image"]'],
        img: ['Image'],
        object: ['Object'],
        area: ['Area'],
        'input[type="image"]': ['ImageInput'],
      },
    ],
    'vuejs-accessibility/anchor-has-content': 'error',
    'vuejs-accessibility/aria-props': 'error',
    'vuejs-accessibility/aria-role': [
      'error',
      {
        ignoreNonDOM: true,
      },
    ],
    'vuejs-accessibility/aria-unsupported-elements': 'error',
    'vuejs-accessibility/click-events-have-key-events': 'error',
    'vuejs-accessibility/form-has-label': 'error',
    'vuejs-accessibility/heading-has-content': 'error',
    'vuejs-accessibility/label-has-for': [
      'error',
      {
        required: {
          some: ['nesting', 'id'],
        },
      },
    ],
    'vuejs-accessibility/media-has-caption': 'error',
    'vuejs-accessibility/mouse-events-have-key-events': 'error',
    'vuejs-accessibility/no-autofocus': 'error',
    'vuejs-accessibility/no-onchange': 'error',
    'vuejs-accessibility/no-redundant-roles': 'error',
    'vuejs-accessibility/no-access-key': 'error',
    'vuejs-accessibility/no-distracting-elements': 'error',
    'vuejs-accessibility/no-static-element-interactions': 'error',
    'vuejs-accessibility/tabindex-no-positive': 'error',
  },
  languageOptions: {
    parserOptions: {
      project: true,
    },
  },
}).override('nuxt/typescript/rules', {
  rules: {
    'vue/html-self-closing': 0,
    '@typescript-eslint/no-explicit-any': 'error',
    '@typescript-eslint/ban-ts-comment': 'off',
    // Add the same rules here to ensure they're not overridden
    '@typescript-eslint/no-unused-vars': [
      'error',
      {
        vars: 'all',
        args: 'after-used',
        ignoreRestSiblings: true,
        argsIgnorePattern: '^_',
        varsIgnorePattern: '^_',
      },
    ],
    '@typescript-eslint/consistent-type-imports': [
      'error',
      {
        prefer: 'type-imports',
        fixStyle: 'separate-type-imports',
      },
    ],
    // Prevent unsafe array access patterns that can cause SSR crashes
    // This rule catches patterns like: obj?.prop.length (without optional chaining on .length)
    'no-unsafe-optional-chaining': [
      'error',
      {
        disallowArithmeticOperators: true,
      },
    ],
  },
}).append({
  // cloud_functions/ holds deployed GCP function source. It is kept in the repo
  // (tracked, not gitignored) so a fresh deployment has what it needs, but it is
  // not part of the app's lint surface. The Nuxt flat config otherwise picks it
  // up via .gitignore, so ignore it explicitly here.
  ignores: ['cloud_functions/**'],
}).append({
  // Test specs cast Apollo/mocks with `as any` by design (e.g.
  // `(useMutation as any).mock`). Keep no-explicit-any relaxed in specs while it
  // is enforced as an error in application source. Genuine external-lib interop
  // in source (e.g. Three.js in StlViewer.vue) uses targeted inline disables.
  files: ['**/*.spec.ts', '**/*.test.ts'],
  rules: {
    '@typescript-eslint/no-explicit-any': 'off',
  },
}).append({
  // Stylistic Vue rules we intentionally do not enforce. The Nuxt Vue preset
  // re-enables vue/html-self-closing after the top-level override, so this final
  // append is what actually silences it (and vue/first-attribute-linebreak).
  rules: {
    'vue/html-self-closing': 'off',
    'vue/first-attribute-linebreak': 'off',
  },
});