eslint.config.js

export default [
  {
    files: ['**/*.js'],
    languageOptions: {
      ecmaVersion: 2022,
      sourceType: 'module',
      globals: {
        window: 'readonly',
        document: 'readonly',
        HTMLElement: 'readonly',
        WebSocket: 'readonly',
        requestAnimationFrame: 'readonly',
        cancelAnimationFrame: 'readonly',
        setTimeout: 'readonly',
        clearTimeout: 'readonly',
        setInterval: 'readonly',
        clearInterval: 'readonly',
        fetch: 'readonly',
        performance: 'readonly',
        console: 'readonly',
        RequestInit: 'readonly',
      },
    },
    rules: {
      'no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
      'no-undef': 'error',
      'no-const-assign': 'error',
      'no-dupe-keys': 'error',
      'no-duplicate-case': 'error',
      'eqeqeq': ['warn', 'smart'],
      'no-var': 'error',
      'prefer-const': 'warn',
    },
  },
  {
    ignores: ['test.html', 'node_modules/'],
  },
];