.eslintrc.json

{
    "env": {
        "commonjs": true,
        "es6": true,
        "node": true,
        "jest": true
    },
    "extends": ["eslint:recommended"],
    "globals": {
        "BigInt": true,
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    },
    "parser": "babel-eslint",
    "parserOptions": {
        "ecmaVersion": 2018
    },
    "rules": {
        "arrow-parens": ["error", "as-needed"],
        "brace-style": ["error", "1tbs"],
        "comma-dangle": ["error", "always-multiline"],
        "curly": ["error", "all"],
        "indent": ["error", 4],
        "linebreak-style": ["error", "unix"],
        "no-var": "error",
        "operator-linebreak": ["error", "after"],
        "prefer-const": ["error", { "destructuring": "any" }],
        "quotes": ["error", "single", { "avoidEscape": true }],
        "semi": ["error", "never"],
        "max-len": [
            "error",
            {
                "code": 120,
                "ignoreUrls": true,
                "ignoreStrings": true,
                "ignoreTemplateLiterals": true
            }
        ]
    }
}