.eslintrc

{
    "parser": "babel-eslint",
    "parserOptions": {
        "ecmaVersion": 2017,
        "sourceType": "module",
        "ecmaFeatures": {
            "jsx": true
        }
    },
    "extends": [
        "airbnb",
        "plugin:flowtype/recommended"
    ],
    "plugins": [
        "flowtype"
    ],
    "env": { 
      "browser": true,
      "jest": true
    },
    "settings": {
        "flowtype": {
          "onlyFilesWithFlowAnnotation": false
        }
    },
    "rules": {
        "flowtype/no-types-missing-file-annotation": 0,     
        "indent": [2, 4],
        "no-unused-vars": [
            "warn",
            {
                "vars": "all",
                "args": "after-used",
                "ignoreRestSiblings": true
            }
        ],
        "max-len": [
            1, 120, 4, {
            "ignoreComments": true,
            "ignoreUrls": true,
            "ignorePattern": "^\\s*var\\s.+=\\s*require\\s*\\("
            }
        ],
        "complexity": [1, 5],
        "import/no-extraneous-dependencies": [
        "error", {
            "optionalDependencies": false,
            "peerDependencies": true
            }
        ],
        "no-prototype-builtins": "off",
        "no-plusplus": ["error", { "allowForLoopAfterthoughts": true }],
        "comma-dangle": ["error", {
            "arrays": "always-multiline",
            "objects": "always-multiline",
            "imports": "always-multiline",
            "exports": "always-multiline",
            "functions": "always-multiline"
        }],
        "no-multi-spaces": ["error", {"ignoreEOLComments": true}],
        "no-return-assign": ["error", "except-parens"],
        "react/jsx-indent": [2, 4],
        "react/jsx-indent-props": [2, 4],
        "react/prefer-es6-class": [1, "always"],
        "react/jsx-no-bind": [1, {
            "ignoreRefs": false,
            "allowArrowFunctions": false,
            "allowBind": false
        }],
        "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
        "react/no-unused-prop-types": [2, { "skipShapeProps": true }],
        "react/forbid-prop-types": [0]
    },
    "overrides": [
        {
            "files": [
                "**/*.spec.js",
                "**/__tests__/**/*.js",
                "**/__mocks__/**/*.js"
            ],
            "env": {
            "jest": true
            },
            "rules": {
                "arrow-body-style": 0
            }
        }
    ]
}