nx/packages/eslint-plugin/src/flat-configs/react-base.ts

import { fixupPluginRules } from '@eslint/compat';
import * as importPlugin from 'eslint-plugin-import';
import globals from 'globals';
import tseslint from 'typescript-eslint';

/**
 * This configuration is intended to be applied to ALL files within a React
 * project in an Nx workspace.
 *
 * It should therefore NOT contain any rules or plugins which are specific
 * to one particular variant, e.g. TypeScript vs JavaScript, .js vs .jsx etc
 *
 * This configuration is intended to be combined with other configs from this
 * package.
 */

/**
 * Rule set originally adapted from:
 * https://github.com/facebook/create-react-app/blob/567f36c9235f1e1fd4a76dc6d1ae00be754ca047/packages/eslint-config-react-app/index.js
 */
export default tseslint.config({
  plugins: { import: fixupPluginRules(importPlugin) },
  languageOptions: {
    globals: {
      ...globals.browser,
      ...globals.commonjs,
      ...globals.es2015,
      ...globals.jest,
      ...globals.node,
    },
  },
  rules: {
    /**
     * Standard ESLint rule configurations
     * https://eslint.org/docs/rules
     */
    'array-callback-return': 'warn',
    'dot-location': ['warn', 'property'],
    eqeqeq: ['warn', 'smart'],
    'new-parens': 'warn',
    'no-caller': 'warn',
    'no-cond-assign': ['warn', 'except-parens'],
    'no-const-assign': 'warn',
    'no-control-regex': 'warn',
    'no-delete-var': 'warn',
    'no-dupe-args': 'warn',
    'no-dupe-keys': 'warn',
    'no-duplicate-case': 'warn',
    'no-empty-character-class': 'warn',
    'no-empty-pattern': 'warn',
    'no-eval': 'warn',
    'no-ex-assign': 'warn',
    'no-extend-native': 'warn',
    'no-extra-bind': 'warn',
    'no-extra-label': 'warn',
    'no-fallthrough': 'warn',
    'no-func-assign': 'warn',
    'no-implied-eval': 'warn',
    'no-invalid-regexp': 'warn',
    'no-iterator': 'warn',
    'no-label-var': 'warn',
    'no-labels': ['warn', { allowLoop: true, allowSwitch: false }],
    'no-lone-blocks': 'warn',
    'no-loop-func': 'warn',
    'no-mixed-operators': [
      'warn',
      {
        groups: [
          ['&', '|', '^', '~', '<<', '>>', '>>>'],
          ['==', '!=', '===', '!==', '>', '>=', '<', '<='],
          ['&&', '||'],
          ['in', 'instanceof'],
        ],
        allowSamePrecedence: false,
      },
    ],
    'no-multi-str': 'warn',
    'no-native-reassign': 'warn',
    'no-negated-in-lhs': 'warn',
    'no-new-func': 'warn',
    'no-new-object': 'warn',
    'no-new-symbol': 'warn',
    'no-new-wrappers': 'warn',
    'no-obj-calls': 'warn',
    'no-octal': 'warn',
    'no-octal-escape': 'warn',
    'no-redeclare': 'warn',
    'no-regex-spaces': 'warn',
    'no-restricted-syntax': ['warn', 'WithStatement'],
    'no-script-url': 'warn',
    'no-self-assign': 'warn',
    'no-self-compare': 'warn',
    'no-sequences': 'warn',
    'no-shadow-restricted-names': 'warn',
    'no-sparse-arrays': 'warn',
    'no-template-curly-in-string': 'warn',
    'no-this-before-super': 'warn',
    'no-throw-literal': 'warn',
    'no-restricted-globals': ['error', ...require('confusing-browser-globals')],
    'no-unexpected-multiline': 'warn',
    'no-unreachable': 'warn',
    'no-unused-expressions': 'off',
    'no-unused-labels': 'warn',
    'no-useless-computed-key': 'warn',
    'no-useless-concat': 'warn',
    'no-useless-escape': 'warn',
    'no-useless-rename': [
      'warn',
      {
        ignoreDestructuring: false,
        ignoreImport: false,
        ignoreExport: false,
      },
    ],
    'no-with': 'warn',
    'no-whitespace-before-property': 'warn',
    'require-yield': 'warn',
    'rest-spread-spacing': ['warn', 'never'],
    strict: ['warn', 'never'],
    'unicode-bom': ['warn', 'never'],
    'use-isnan': 'warn',
    'valid-typeof': 'warn',
    'no-restricted-properties': [
      'error',
      {
        object: 'require',
        property: 'ensure',
        message:
          'Please use import() instead. More info: https://facebook.github.io/create-react-app/docs/code-splitting',
      },
      {
        object: 'System',
        property: 'import',
        message:
          'Please use import() instead. More info: https://facebook.github.io/create-react-app/docs/code-splitting',
      },
    ],
    'getter-return': 'warn',

    /**
     * Import rule configurations
     * https://github.com/benmosher/eslint-plugin-import
     */
    'import/first': 'error',
    'import/no-amd': 'error',
    'import/no-webpack-loader-syntax': 'error',
  },
});