.eslintrc

{
  "parser": "babel-eslint",
  "ecmaFeatures": {
    "modules": true
  },
  "env": {
    "browser": false,
    "commonjs": true,
    "es6": true,
    "node": true,
    "mocha": true
  },
  "rules": {
    "consistent-return": 0,
    "strict": 0,
    "no-underscore-dangle": 0,
    "no-multi-spaces": 0,
    "space-infix-ops": 0,
    "quotes": [ 0 ],
    "new-cap": 0,
    "comma-spacing": 0,
    "no-use-before-define": 0,
    "camelcase": 0,
    "curly": 0,
    "no-trailing-spaces": 0,
    "key-spacing": 2,
    "semi-spacing": 0,
    "no-unused-expressions": 0,
    "eol-last": 0,
    "dot-notation": [2, {"allowPattern": "^NODE_ENV$"}],
    "no-extend-native": 0,
    "comma-dangle": 0,
    "no-redeclare": 2,
    "no-shadow": 2,
    "no-new-func": 2,
    "no-unused-vars": 2,
    "semi": [2, "always"],
    "no-extra-semi": 2,
    "no-debugger": 2,             // disallow use of debugger
    "no-dupe-keys": 2,            // disallow duplicate keys when creating object literals
    "no-empty": 2,                // disallow empty statements
    "no-empty-character-class": 2,// disallow the use of empty character classes in regular expressions
    "no-ex-assign": 2,            // disallow assigning to the exception in a catch block
    "no-func-assign": 2,          // disallow overwriting functions written as function declarations
    "no-invalid-regexp": 2,       // disallow invalid regular expression strings in the RegExp constructor
    "no-unreachable": 2,          // disallow unreachable statements after a return, throw, continue, or break statement
    "no-unexpected-multiline": 2,
    "no-undef": 2,
    "no-shadow-restricted-names": 2,
    "no-delete-var": 2,
    "no-label-var": 2,
    "no-var": 2,
    "no-const-assign": 2,
    "prefer-const": 2
  }
}