eslint-flat-config-airbnb/base/es6.js

A mostly reasonable approach to JavaScript and React using Airbnb's ESLint config, updated for ESLint 9+

import globals from 'globals';
import stylistic from '@stylistic/eslint-plugin';

const es6 = {
    languageOptions: {
        globals: {
            ...globals.es2015,
        },
        parserOptions: {
            ecmaVersion: 6,
            sourceType: 'module',
            ecmaFeatures: {
                generators: false,
                objectLiteralDuplicateProperties: false,
            },
        },
    },
    plugins: {
        '@stylistic': stylistic,
    },
    rules: {
        'arrow-body-style': ['error', 'as-needed', { requireReturnForObjectLiteral: false }],
        '@stylistic/arrow-parens': ['error', 'always'],
        '@stylistic/arrow-spacing': ['error', { before: true, after: true }],
        'constructor-super': 'error',
        '@stylistic/generator-star-spacing': ['error', { before: false, after: true }],
        'no-class-assign': 'error',
        '@stylistic/no-confusing-arrow': ['error', { allowParens: true }],
        'no-const-assign': 'error',
        'no-dupe-class-members': 'error',
        'no-duplicate-imports': 'error',
        'no-new-native-nonconstructor': 'error',
        'no-restricted-exports': ['error', { restrictedNamedExports: ['default', 'then'] }],
        'no-restricted-imports': ['off', { paths: [], patterns: [] }],
        'no-this-before-super': 'error',
        'no-useless-computed-key': 'error',
        'no-useless-constructor': 'error',
        'no-useless-rename': ['error', { ignoreDestructuring: false, ignoreImport: false, ignoreExport: false }],
        'no-var': 'error',
        'object-shorthand': ['error', 'always', { ignoreConstructors: false, avoidQuotes: true }],
        'prefer-arrow-callback': ['error', { allowNamedFunctions: false, allowUnboundThis: true }],
        'prefer-const': ['error', { destructuring: 'any', ignoreReadBeforeAssign: true }],
        'prefer-destructuring': ['error', { VariableDeclarator: { array: false, object: true }, AssignmentExpression: { array: true, object: false } }, { enforceForRenamedProperties: false }],
        'prefer-numeric-literals': 'error',
        '@stylistic/prefer-reflect': 'off',
        'prefer-rest-params': 'error',
        'prefer-spread': 'error',
        'prefer-template': 'error',
        'require-yield': 'error',
        '@stylistic/rest-spread-spacing': ['error', 'never'],
        'sort-imports': ['off', {
            ignoreCase: false, ignoreDeclarationSort: false, ignoreMemberSort: false, memberSyntaxSortOrder: ['none', 'all', 'multiple', 'single'],
        }],
        'symbol-description': 'error',
        '@stylistic/template-curly-spacing': 'error',
        '@stylistic/yield-star-spacing': ['error', 'after'],
    },
};

export default es6;