.eslintrc

{
  "extends": [
    "plugin:flowtype/recommended",
    "plugin:react/recommended",
    "plugin:import/errors",
    "plugin:import/warnings",
    "prettier",
    "prettier/flowtype",
    "prettier/react"
  ],
  "parser": "babel-eslint",
  "plugins": [
    "react",
    "flowtype",
    "prettier"
  ],
  "env": {
    "jasmine": true
  },
  "rules": {
    "prettier/prettier": ["error", {
      "trailingComma": "es5",
      "singleQuote": true
    }],

    "no-underscore-dangle": "off",
    "no-use-before-define": "off",
    "no-unused-expressions": "off",
    "new-cap": "off",
    "no-plusplus": "off",
    "no-class-assign": "off",
    "no-duplicate-imports": "off",

    "import/extensions": "off",
    "import/no-extraneous-dependencies": "off",
    "import/no-unresolved": "off",

    "react/jsx-filename-extension": [
      "off", { "extensions": [".js", ".jsx"] }
    ],

    "react/sort-comp": "off",
    "react/prefer-stateless-function": "off",

    "react/forbid-prop-types": "warn",
    "react/prop-types": "off",
    "react/require-default-props": "off",
    "react/no-unused-prop-types": "off",

    "flowtype/boolean-style": [
      "error",
      "boolean"
    ],
    "flowtype/no-weak-types": "off",
    "flowtype/require-parameter-type": "off",
    "flowtype/require-return-type": [
      "off",
      "always",
      {
        "annotateUndefined": "never"
      }
    ],
    "flowtype/require-valid-file-annotation": "error",
    "flowtype/use-flow-type": "warn",
    "flowtype/valid-syntax": "warn"
  },
  "settings": {
    "flowtype": {
      "onlyFilesWithFlowAnnotation": true
    }
  },
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "modules": true
    }
  }
}