.eslintrc

{
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true,
      "legacyDecorators": true
    }
  },
  "env": {
    "browser": true,
    "node": true,
    "es6": true
  },
  "globals": {
    "document": true,
    "window": true
  },
  "plugins": ["jest", "flowtype", "prettier", "extra-rules", "compat"],
  "extends": ["airbnb", "plugin:flowtype/recommended", "prettier"],
  "rules": {
    "max-params": ["error", { "max": 7 }],
    "max-statements": ["error", { "max": 100 }],
    "max-lines": ["error", { "max": 1000 }],
    "max-len": 0,
    "complexity": ["error", { "max": 10 }],
    "object-shorthand": ["warn", "properties"],
    "array-callback-return": "error",
    "no-undef": "error",
    "extra-rules/no-commented-out-code": "error",
    "class-methods-use-this": "off",
    "react/react-in-jsx-scope": "off",
    "react/button-has-type": "off",
    "react/jsx-props-no-spreading": "off",
    "react/jsx-filename-extension": [
      "error",
      {
        "extensions": [".js"]
      }
    ],
    "prettier/prettier": "error",
    "compat/compat": "error",
    "linebreak-style": "off"
  },
  "overrides": [
    {
      "files": [
        "**/*.story.js",
        "**/*.mock.js",
        "**/*.config.js",
        "**/*.setup.js",
        "**/*.test.js",
        "**/*.spec.js"
      ],
      "rules": {
        "import/no-extraneous-dependencies": "off",
        "no-console": "off"
      }
    },
    {
      "files": ["**/*.test.js", "**/*.spec.js"],
      "env": {
        "jest/globals": true
      },
      "rules": {
        "flowtype/no-types-missing-file-annotation": "off"
      }
    }
  ],
  "settings": {
    "polyfills": ["promises"]
  }
}