.eslintrc

{
  "parser": "babel-eslint",
  "plugins": [
    "react", "babel", "flowtype"
  ],
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "extends": ["eslint:recommended", "plugin:react/recommended"],
  "env": {
    "commonjs": true,
    "es6": true,
    "node": true
  },
  "rules": {
    "no-extra-semi": "error",
    "semi": ["error", "never"],
    "flowtype/boolean-style": [
      2,
      "boolean"
    ],
    "flowtype/define-flow-type": 1,
    "flowtype/generic-spacing": [
      2,
      "never"
    ],
    "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/union-intersection-spacing": [
      2,
      "always"
    ],
    "flowtype/use-flow-type": 1,
    "flowtype/valid-syntax": 1
  },
  "settings": {
    "flowtype": {
      "onlyFilesWithFlowAnnotation": false
    }
  }
}