.eslintrc.js

module.exports = {
  parser: 'babel-eslint',
  plugins: ['flowtype'],
  extends: ['airbnb', 'prettier', 'prettier/flowtype', 'prettier/react'],
  env: {
    browser: true,
  },
  rules: {
    'no-else-return': 0,
    'flowtype/boolean-style': [2, 'boolean'],
    'flowtype/define-flow-type': 1,
    'flowtype/no-primitive-constructor-types': 2,
    'flowtype/no-types-missing-file-annotation': 2,
    'flowtype/no-weak-types': 2,
    'flowtype/require-parameter-type': [2, { excludeArrowFunctions: true }],
    'flowtype/require-valid-file-annotation': 2,
    'flowtype/type-id-match': [2, '^[A-Z]+.*$'],
    'flowtype/use-flow-type': 1,
    'flowtype/valid-syntax': 1,
    'import/no-extraneous-dependencies': [
      'error',
      {
        devDependencies: true,
        optionalDependencies: false,
        peerDependencies: false,
      },
    ],
    'react/jsx-filename-extension': [1, { extensions: ['.js', '.jsx'] }],
    'react/sort-comp': [
      1,
      {
        order: [
          'type-annotations',
          'static-methods',
          'lifecycle',
          'everything-else',
          'render',
        ],
        groups: {
          lifecycle: [
            'displayName',
            'propTypes',
            'contextTypes',
            'childContextTypes',
            'mixins',
            'statics',
            'defaultProps',
            'constructor',
            'getDefaultProps',
            'getInitialState',
            'state',
            'getChildContext',
            'componentWillMount',
            'componentDidMount',
            'componentWillReceiveProps',
            'shouldComponentUpdate',
            'componentWillUpdate',
            'componentDidUpdate',
            'componentWillUnmount',
          ],
        },
      },
    ],
  },
  settings: {
    flowtype: {
      onlyFilesWithFlowAnnotation: false,
    },
  },
};