.eslintrc.json

{
    "env": {
        "jest/globals": true
    },
    "extends": [
        "eslint:recommended",
        "standard",
        "prettier",
        "prettier/standard"
    ],
    "parser": "babel-eslint",
    "parserOptions": {
        "ecmaFeatures": {
            "experimentalObjectRestSpread": true,
            "jsx": false,
            "modules": false
        },
        "ecmaVersion": 7,
        "sourceType": "script"
    },
    "plugins": ["babel", "jest"],
    "rules": {
        "arrow-parens": ["error", "always"],
        "camelcase": "error",
        "curly": ["error", "all"],
        "jest/no-disabled-tests": "warn",
        "jest/no-focused-tests": "warn",
        "jest/no-identical-title": "warn",
        "jest/valid-expect": "warn",
        "max-len": [
            "error",
            {
                "code": 140,
                "ignoreUrls": true
            }
        ],
        "multiline-comment-style": ["error", "starred-block"],
        "no-confusing-arrow": "error",
        "no-console": "error",
        "no-undefined": "error",
        "no-var": "error"
    }
}