.eslintrc

{
  // change to eslint-config-airbnb/base for a config without react rules
  "extends": "eslint-config-airbnb/base", // https://github.com/airbnb/javascript/blob/master/packages/eslint-config-airbnb/.eslintrc

  // Allow the following global variables
  "env": {
    "browser": true, // browser global variables
    "node": true, // Node.js global variables and Node.js scoping.
    "mocha": true // adds all of the Mocha testing global variables.
  },

  "rules": {
    /**
     * ES6
     */
    "prefer-const": 0,

    /**
     * Variables
     */
    "no-shadow": [2, {
      "builtinGlobals": true
    }],
    "no-unused-vars": [2, {
      "vars": "all",
      "args": "after-used"
    }],
    "no-use-before-define": [2, "nofunc"],

    /**
     * Possible errors
     */
    "comma-dangle": [2, "never"],
    "no-inner-declarations": [2, "both"],

    /**
     * Best practices
     */
    "consistent-return": 0,
    "curly": 2,
    "dot-notation": [2, {
      "allowKeywords": true,
      "allowPattern": "^[a-z]+(_[a-z]+)+$"
    }],
    "eqeqeq": [2, "allow-null"],
    "no-eq-null": 0,
    "no-redeclare": [2, {
      "builtinGlobals": true
    }],
    "wrap-iife": [2, "inside"],

    /**
     * Style
     */
    "indent": [2, 2, {
      "VariableDeclarator": {
        "var": 2,
        "let": 2,
        "const": 3
      },
      "SwitchCase": 1
    }],
    "func-names": 0,
    "no-multiple-empty-lines": [2, {
      "max": 1
    }],
    "no-extra-parens": [2, "functions"],
    "one-var": 0,
    "space-before-function-paren": [2, "never"],

    /**
     * Node Style
     */
    "node/no-missing-import": 2,
    "node/no-missing-require": 2,
    "node/no-unpublished-import": 2,
    "node/no-unpublished-require": 2,
    "node/shebang": 2
  },

  "plugins": ["node"]
}