.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es6: true,
  },
  ignorePatterns: ['**/*.ts', '**/*.tsx', 'node_modules', 'src/legacy'],
  extends: [
    'plugin:react/recommended',
    'airbnb',
  ],
  globals: {
    Atomics: 'readonly',
    SharedArrayBuffer: 'readonly',
  },
  parser: '@babel/eslint-parser',
  parserOptions: {
    ecmaFeatures: {
      jsx: true,
    },
    ecmaVersion: 2018,
    sourceType: 'module',
  },
  plugins: ['react', 'babel', '@typescript-eslint'],
  rules: {
    // uncomment 'linebreak-style' to build in windows - its not adviced to commit from windows
    // read more - https://community.perforce.com/s/article/3096
    // ['linebreak-style']: 0,
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        jsx: 'never',
        ts: 'never',
        tsx: 'never',
      },
    ],
    // we don't want to force to define function component only
    'react/function-component-definition': 'off',
    'no-unused-expressions': 'off',
    '@typescript-eslint/no-unused-expressions': ['error'],
  },
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.js', '.jsx', '.ts', '.tsx'],
      },
    },
  },
};