.eslintrc

{
    "ecmaFeatures": {
        "arrowFunctions": false
    },

    "env": {
        "node": true
    },

    "rules": {

        // Prevent Error Prone Code
        ///////////////////////////////////////////////////

        "no-cond-assign": [2, "always"],

        "no-console": 1,

        "no-empty-class": 1,

        "no-extra-parens": 1,

        "no-reserved-keys": 2,

        "valid-jsdoc": [1, {
            "return": "returns"
        }],

        // Best Practice
        ///////////////////////////////////////////////////

        "block-scoped-var": 2,

        "complexity": [1, 3],

        "default-case": 2,

        "guard-for-in": 2,

        "no-div-regex": 2,

        "no-else-return": 2,

        "no-eq-null": 2,

        "no-eval": 1,

        "no-extend-native": 1,

        "no-floating-decimal": 2,

        "no-implied-eval": 2,

        "no-process-env": 1,

        "no-self-compare": 2,

        "no-throw-literal": 2,

        "no-void": 1,

        "no-warning-comments": [2, {"terms": ["FIXME"]}],

        "radix": 2,

        "wrap-iife": 2,

        "strict": [2, "function"],

        "no-undefined": 2,

        // Node Specific
        ///////////////////////////////////////////////////

        "handle-callback-err": 2,

        "no-mixed-requires": [2, true],

        "no-new-require": 2,

        "no-path-concat": 2,

        "no-process-exit": 0,

        // Opinion
        ///////////////////////////////////////////////////

        "indent": 2,

        "brace-style": [2, "stroustrup"],

        "comma-spacing": [2, {"before": false, "after": true}],

        "consistent-this": [2, "self"],

        "func-style": [2, "expression"],

        "key-spacing": [2,
            {
                "beforeColon": false,

                "afterColon": true
            }
        ],

        "max-nested-callbacks": [2, 3],

        "no-inline-comments": 2,

        "no-lonely-if": 2,

        "no-multiple-empty-lines": [2, {"max": 4}],

        "no-spaced-func": 0,

        "no-underscore-dangle": 1,

        "padded-blocks": [2, "never"],

        "quote-props": 2,

        "quotes": [2, "single", "avoid-escape"],

        "semi": [2, "always"],

        "space-after-keywords": 2,

        "space-before-blocks": 2,

        "space-before-function-parentheses": 2,

        "space-in-brackets": [2, "never"],

        "space-in-parens": [2, "never"],

        "space-unary-ops": 2,

        "spaced-line-comment": 2
    }
}