.eslintrc

// eslint.org
{
  "env": {
    "node": true,
    "mocha": true
  },
  "rules": {
    // Possible errors
    "comma-dangle": [2, "never"],
    "no-cond-assign": [2, "always"],
    "no-constant-condition": 2,
    "no-dupe-args": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-empty": 2,
    "no-ex-assign": 2,
    "no-extra-boolean-cast": 2,
    "no-extra-parens": 2,
    "no-extra-semi": 2,
    "no-func-assign": 2,
    "no-inner-declarations": 2,
    "no-invalid-regexp": 2,
    "no-unexpected-multiline": 2,
    "no-sparse-arrays": 2,
    "use-isnan": 2,
    "valid-typeof": 2,

    // Best practices
    "accessor-pairs": 2,
    "block-scoped-var": 2,
    "curly": 2,
    "default-case": 2,
    "dot-notation": 2,
    "dot-location": [2, "property"],
    "eqeqeq": [2, "smart"],
    "guard-for-in": 2,
    "max-depth": [2, 3],
    "no-else-return": 2,
    "no-eq-null": 2,
    "no-extend-native": 2,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-extra-bind": 2,
    "no-lone-blocks": 2,
    "no-loop-func": 2,
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-native-reassign": 2,
    "no-new-func": 2,
    "no-new-wrappers": 2,
    "no-new": 2,
    "no-param-reassign": 2,
    "no-return-assign": 2,
    "no-self-compare": 2,
    "no-unused-expressions": 2,
    "wrap-iife": [2, "outside"],
    "yoda": [2, "never", { "exceptRange": true }],
    "strict": [2, "global"],

    // Variable rules
    "no-catch-shadow": 2,
    "no-delete-var": 2,
    "no-shadow-restricted-names": 2,
    "no-shadow": 2,
    "no-undef-init": 2,
    "no-undef": 2,
    "no-undefined": 2,
    "no-unused-vars": 2,
    "no-use-before-define": [2, "nofunc"],

    // Nodejs rules
    "handle-callback-err": 2,
    "no-mixed-requires": 2,
    "no-new-require": 2,
    "no-path-concat": 2,

    // Style rules
    "array-bracket-spacing": [2, "never"],
    "brace-style": [2, "1tbs", { "allowSingleLine": false }],
    "camelcase": [2, {"properties": "always"}],
    "comma-spacing": [2, {"before": false, "after": true}],
    "comma-style": [2, "last"],
    "computed-property-spacing": [2, "never"],
    "consistent-this": [2, "self"],
    "eol-last": 2,
    "func-names": 0,
    "func-style": [2, "declaration"],
    "indent": [2, 2],
    "key-spacing": [2, {"beforeColon": false, "afterColon": true}],
    "linebreak-style": [2, "unix"],
    "max-nested-callbacks": [2, 3],
    "new-cap": 2,
    "new-parens": 2,
    "no-array-constructor": 2,
    "no-lonely-if": 2,
    "no-multiple-empty-lines": [2, {"max": 1}],
    "no-nested-ternary": 2,
    "no-new-object": 2,
    "no-spaced-func": 2,
    "no-trailing-spaces": 2,
    "no-unneeded-ternary": 2,
    "object-curly-spacing": [2, "never"],
    "one-var": [2, "never"],
    "operator-assignment": [2, "always"],
    "operator-linebreak": [2, "after"],
    "padded-blocks": [2, "never"],
    "quote-props": [2, "as-needed"],
    "quotes": [2, "single", "avoid-escape"],
    "semi-spacing": [2, {"before": false, "after": true}],
    "semi": [2, "never"],
    "space-after-keywords": [2, "always"],
    "space-before-blocks": [2, "always"],
    "space-before-function-paren": [2, "never"],
    "space-in-parens": [2, "never"],
    "space-infix-ops": 2,
    "space-return-throw-case": 2,
    "space-unary-ops": 2,
    "spaced-comment": [2, "always"],
  }
}