.eslintrc.js

module.exports = {
  parser: 'babel-eslint',
  plugins: ['react', 'flowtype', 'import', 'babel'],
  env: {
    browser: true
  },
  extends: ['airbnb'],
  globals: {
    __USE_CSS_MODULES__: true,
    MODULE_VERSION_WEBPACK: '',
    MODULE_VERSION_REACT_FLAG_ICON_CSS: ''
  },
  rules: {
    'import/no-duplicates': 1,
    'no-duplicate-imports': 0,
    'babel/new-cap': 0,
    'new-cap': 0,
    'arrow-parens': 0,
    'babel/no-await-in-loop': 1,
    semi: 0,
    'comma-dangle': 0,
    'react/jsx-filename-extension': 0,
    'react/require-extension': 'off',
    'flowtype/boolean-style': [2, 'boolean'],
    'flowtype/define-flow-type': 1,
    'flowtype/delimiter-dangle': [2, 'never'],
    'flowtype/generic-spacing': [2, 'never'],
    'flowtype/no-weak-types': 2,
    'flowtype/require-parameter-type': 2,
    'flowtype/require-return-type': [
      2,
      'always',
      {
        annotateUndefined: 'never'
      }
    ],
    'flowtype/require-valid-file-annotation': 2,
    'flowtype/semi': [2, 'never'],
    'flowtype/space-after-type-colon': [2, 'always'],
    'flowtype/space-before-generic-bracket': [2, 'never'],
    'flowtype/space-before-type-colon': [2, 'never'],
    'flowtype/type-id-match': [2, '^([A-Z][a-z0-9]+)+Type$'],
    'flowtype/union-intersection-spacing': [2, 'always'],
    'flowtype/use-flow-type': 1,
    'flowtype/valid-syntax': 1
  },
  settings: {
    flowtype: {
      onlyFilesWithFlowAnnotation: false
    }
  }
};