.eslintrc.json

{
    "env": {
        "node": true,
        "jest": true,
        "es6": true
    },
    "extends": "eslint:recommended",
    "parserOptions": {
        "ecmaVersion": 8,
        "sourceType": "module"
    },
    "rules": {
        "array-bracket-spacing": [
            "error",
            "always"
        ],
        "block-scoped-var": "error",
        "block-spacing": [
            "error",
            "never"
        ],
        "brace-style": [
            "error",
            "1tbs"
        ],
        "comma-dangle": [
            "error",
            "never"
        ],
        "indent": [
            "error",
            4
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "global-require": "error",
        "no-extra-parens": "error",
        "no-inline-comments": "error",
        "no-lonely-if": "error",
        "no-multiple-empty-lines": [
            "error",
            {
                "max": 1,
                "maxBOF": 0,
                "maxEOF": 0
            }
        ],
        "no-mixed-operators": "error",
        "no-mixed-requires": "error",
        "no-nested-ternary": "error",
        "no-plusplus": "error",
        "no-return-assign": "error",
        "no-trailing-spaces": "error",
        "no-useless-return": "error",
        "object-curly-newline": [
            "error",
            {
                "minProperties": 2
            }
        ],
        "one-var": [
            "error",
            {
                "initialized": "never",
                "uninitialized": "consecutive"
            }
        ],
        "one-var-declaration-per-line": [
            "error",
            "initializations"
        ],
        "padded-blocks": [
            "error",
            "never"
        ],
        "quotes": [
            "error",
            "single"
        ],
        "require-jsdoc": [
            "warn",
            {
                "require": {
                    "FunctionDeclaration": true,
                    "MethodDefinition": true,
                    "ClassDeclaration": true,
                    "ArrowFunctionExpression": true,
                    "FunctionExpression": true
                }
            }
        ],
        "semi": [
            "error",
            "always"
        ],
        "space-before-function-paren": [
            "error",
            {
                "anonymous": "always",
                "named": "never"
            }
        ],
        "valid-jsdoc": "error"
    }
}