.eslintrc.js

module.exports = {
  env: {
    node: true,
    browser: true,
    es6: true,
  },
  parser: 'babel-eslint',
  extends: [
    'plugin:react/recommended',
    'airbnb',
  ],
  parserOptions: {
    ecmaFeatures: {
      jsx: true,
    },
    ecmaVersion: 2021,
    sourceType: 'module',
  },
  plugins: [
    'react',
    'jest',
  ],
  rules: {
    'react/jsx-props-no-spreading': ['off'],
    'react/jsx-filename-extension': [1, { extensions: ['.js', '.jsx'] }],
    'import/prefer-default-export': 0,
    'no-unused-vars': 1, // no unnecessary imports either
    'global-require': 0,
    indent: [
      'error',
      2,
    ],
    'linebreak-style': [
      'error',
      'unix',
    ],
    quotes: [
      'error',
      'single',
    ],
    semi: [
      'error',
      'never',
    ],
    eqeqeq: 'error',
    'no-trailing-spaces': 'error',
    'object-curly-spacing': [
      'error', 'always',
    ],
    'arrow-spacing': [
      'error', { before: true, after: true },
    ],
    'no-console': 0,
    'react/prop-types': 0,
  },
  settings: {
    react: {
      createClass: 'createReactClass', // Regex for Component Factory to use,
      // default to "createReactClass"
      pragma: 'React', // Pragma to use, default to "React"
      version: 'detect', // React version. "detect" automatically picks the version you have installed.
      // You can also use `16.0`, `16.3`, etc, if you want to override the detected value.
      // default to latest and warns if missing
      // It will default to "detect" in the future
      flowVersion: '0.53', // Flow version
    },
  },
}