.eslintrc.json

{
  "env": {
    "mocha": true,
    "node": true
  },
  "globals": {},
  "extends": "eslint:recommended",

  // Stop ESLint from looking for a configuration file in parent folders
  "root": true,

  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 8,
    "sourceType": "script",
    "ecmaFeatures": {
      "experimentalObjectRestSpread": true
    }
  },
  "rules": {
    "block-scoped-var": 2,
    "complexity": [
      0,
      5
    ],
    "consistent-return": 1,
    "curly": [
      2,
      "all"
    ],
    "dot-notation": 2,
    "eqeqeq": 2,
    "no-caller": 2,
    "no-else-return": 2,
    "no-eq-null": 2,
    "no-extend-native": 2,
    "no-implicit-coercion": 2,
    "no-loop-func": 2,
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-new-func": 2,
    "no-new-wrappers": 2,
    "no-new": 2,
    "no-param-reassign": 2,
    "no-unused-expressions": 2,
    "no-useless-call": 2,
    "no-useless-concat": 2,
    "no-with": 2,
    "vars-on-top": 2,
    "wrap-iife": [2, "any"],
    "yoda": [
      2,
      "never"
    ],

    "no-shadow": 2,
    "no-use-before-define": 2,

    "callback-return": 2,
    "handle-callback-err": 2,
    "no-path-concat": 2,

    "array-bracket-spacing": [
      1,
      "always", {
        "objectsInArrays": false
      }
    ],
    "block-spacing": 1,
    "brace-style": 1,
    "camelcase": [
      1, {
        "properties": "never"
      }
    ],
    "comma-spacing": [
      1, {
        "before": false,
        "after": true
      }
    ],
    "comma-style": [
      1,
      "last"
    ],
    "computed-property-spacing": [
      1,
      "never"
    ],
    "consistent-this": [
      1,
      "self"
    ],
    "eol-last": 1,
    "indent": [
      2,
      4, {
        "SwitchCase": 1
      }
    ],
    "key-spacing": [
      1, {
        "beforeColon": false,
        "afterColon": true
      }
    ],
    "keyword-spacing": 1,
    "linebreak-style": [
      1,
      "unix"
    ],
    "lines-around-comment": [
      1, {
        "allowBlockStart": true,
        "beforeBlockComment": true,
        "beforeLineComment": true
      }
    ],
    "max-depth": [
      1,
      4
    ],
    "max-params": [
      1,
      3
    ],
    "max-statements": [
      0,
      10
    ],
    "new-cap": 2,
    "new-parens": 2,
    "padding-line-between-statements": [
        "error",
        { "blankLine": "always", "prev": ["const", "let", "var"], "next": "*"},
        { "blankLine": "any",    "prev": ["const", "let", "var"], "next": ["const", "let", "var"]}
    ],
    "no-array-constructor": 2,
    "no-bitwise": 1,
    "no-lonely-if": 1,
    "no-multiple-empty-lines": 1,
    "no-new-object": 2,
    "no-spaced-func": 1,
    "no-trailing-spaces": 1,
    "no-unneeded-ternary": 1,
    "object-curly-spacing": [
      1,
      "always"
    ],
    "operator-assignment": [
      1,
      "always"
    ],
    "operator-linebreak": [
      1,
      "after"
    ],
    "quote-props": [
      1,
      "as-needed"
    ],
    "quotes": [
      1,
      "single"
    ],
    "semi": [
      2,
      "always"
    ],
    "semi-spacing": [
      1, {
        "before": false,
        "after": true
      }
    ],
    "space-before-blocks": [
      1,
      "always"
    ],
    "space-before-function-paren": [1, { "anonymous": "always", "named": "never" }],
    "space-in-parens": [1, "never"],
    "space-infix-ops": 1,
    "space-unary-ops": 0,
    "spaced-comment": [1, "always", { "line": { "exceptions": ["-"] } }]
  }
}