.eslintrc

{
  "rules": {
    // Disallow or enforce trailing commas (recommended)
    "comma-dangle": [2, "never"],

    // Disallow assignment in condition expressions (recommended)
    "no-cond-assign": [2, "except-parens"],

    // Disallow use of console in the node environment (recommended)
    "no-console": 2,

    // Disallow use of constant expressions in conditions (recommended)
    "no-constant-condition": 2,

    // Disallow control characters in regular expressions (recommended)
    "no-control-regex": 2,

    // Disallow control characters in regular expressions (recommended)
    "no-debugger": 2,

    // Disallow duplicate arguments in functions (recommended)
    "no-dupe-args": 2,

    // Disallow duplicate keys when creating object literals (recommended)
    "no-dupe-keys": 2,

    // Disallow duplicate case label
    "no-duplicate-case": 2,

    // Disallow the use of empty character classes in regular expressions (recommended),
    "no-empty-character-class": 2,

    // Disallow empty statements (recommended)
    "no-empty": 2,

    // Disallow assigning to the exception in a 'catch' block (recommended)
    "no-ex-assign": 2,

    // Disallow double-negation boolean casts in a boolean context (recommended)
    "no-extra-boolean-cast": 2,

    // Disallow unnecessary parentheses
    "no-extra-parens": [0, "all"],

    // Disallow unnecessary semicolons (recommended)
    "no-extra-semi": 2,

    // Disallow overwriting functions written as function declarations (recommended)
    "no-func-assign": 2, 

    // Disallow function or variable declarations in nested blocks (recommended)
    "no-inner-declarations": [2, "both"],

    // Disallow invalid regular expression strings in the 'RegExp' constructor (recommended)
    "no-invalid-regexp": 2,

    // Disallow irregular whitespace outside of strings and comments (recommended)
    "no-irregular-whitespace": 2,

    // Disallow negation of the left operand in an 'in' expression (recommended)
    "no-negated-in-lhs": 2,

    // Disallow use of object properties of the global object (Math and JSON) as functions (recommended)
    "no-obj-calls": 2,

    // Disallow multiple spaces in a regular expression literal (recommended)
    "no-regex-spaces": 2, 

    // Disallow sparse arrays (recommended)
    "no-sparse-arrays": 2,

    // Disallow unreachable statements after a return, throw, continue, or break statement (recommended)
    "no-unreachable": 1,

    // Disallow comparisons with the value 'NaN' (recommended)
    "use-isnan": 2,

    // Ensure JSDoc comments are valid
    "valid-jsdoc": [2, {
      "prefer": {},
      "requireReturn": true,
      "requireParamDescription": true,
      "requireReturnDescription": true
    }],

    // Ensure that the results of typeof are compared against a valid string (recommended)
    "valid-typeof": 2,

    // Avoid code that looks like two expressions but is actually one
    "no-unexpected-multiline": 2,
    
    // Enforces getter/setter pairs in objects
    "accessor-pairs": [2, {
      getWithoutSet: true,
      setWithoutGet: true
    }],

    // Treat 'var' statements as if they were block scoped
    "block-scoped-var": 2,

    // Specify the maximum cyclomatic complexity allowed in the program
    "complexity": [1, 10],

    // Require 'return' statements to either always or never specify values
    "consistent-return": 1,

    // Specify curly brace conventiosn for all control statements
    "curly": [2, "all"],

    // Require 'default' case in 'switch' statements
    "default-case": 2,

    // Encorages use of dot notation whenever possible
    "dot-notation": [2, {
      "allowKeywords": true,
      "allowPattern": ""
    }],

    // Enforces consistent newlines before or after dots
    "dot-location": [2, "property"],

    // Require  use of '===' and '!=='
    "eqeqeq": [2, "allow-null"],

    // Make sure 'for-in' loops have an 'if' statement
    "guard-for-in": 2,

    // "Disallow the use of 'alert', 'confirm', and 'prompt'
    "no-alert": 2,

    // Disallow use of 'arguments.caller' or 'arguments.callee'
    "no-caller": 2,

    // Disallow division operators explicitly at beginning of regular expressions
    "no-div-regex": 2, 

    // Disallow 'else' after a 'return' in an 'if'
    "no-else-return": 2, 

    // Disallow use of labels for anythinig other than loops and switches
    "no-empty-label": 2,

    // Disallow comparisons with null without a type-checking operator
    "no-eq-null": 2,

    // Disallow use of 'eval()'
    "no-eval": 2,

    // Disallow adding to native types
    "no-extend-native": [2, {
      "exceptions": []
    }],

    // Disallow unnecessary function binding
    "no-extra-bind": 2,

    // Disallow fallthrough of 'case' statements (recommended)
    "no-fallthrough": 2,

    // Disallow the use of leading or trailing decimal points in numeric literals.
    "no-floating-decimal": 2,

    // Disallow the type conversiosn with shorter notations
    "no-implicit-coercion": [2, {
      "boolean": true,
      "number": true,
      "string": true
    }],

    // Disallow use of eval()-like methods
    "no-implied-eval": 2,

    // Disallow 'this' keyword outside of classes or class-like objects
    "no-invalid-this": 1,

    // Disallow usage of __iterator__ property
    "no-iterator": 2,

    // Disallow use of labeled statements
    "no-labels": 2, 

    // Disallow unnecessary nested blocks
    "no-lone-blocks": 2,

    // Disallow creation of functions within loops
    "no-loop-func": 2,

    // Disallow use of multiple spaces
    "no-multi-spaces": [2, {
      "exceptions": {}
    }],

    // Disallow use of multiline strings
    "no-multi-str": 2,

    // Disallow reassignments of native objects
    "no-native-reassign": [2, {
      "exceptions": []
    }],

    // Disallow use of new operator for 'Function' object
    "no-new-func": 2,

    // Disallows creating enw instances of 'String', 'Number', and 'Boolean'
    "no-new-wrappers": 2,

    // Disallow use of the 'new' operator when not part of an assignment or comparison
    "no-new": 0,

    // Disallow use of octal escape sequences in string literals, such as 'var foo = "Copyright \251";'
    "no-octal-escape": 2,

    // Disallow use of octal literals (recommended)
    "no-octal": 2, 

    // Disallow reassignment of function parameters
    "no-param-reassign": [2, {
      "props": true
    }],

    // Disallow use of 'process.env'
    "no-process-env": 2,

    // Disallow usage of __proto__ property
    "no-proto": 2,

    // Disallow declaring the same variable more than once (recommended)
    "no-redeclare": [2, {
      "builtinGlobals": true
    }],

    // Disallow use of assignment in 'return' statement
    "no-return-assign": [2, "except-parens"],

    // Disallow use of 'javascript:' urls
    "no-script-url": 2,

    // Disallow comparisons where both sides are exactly the same
    "no-self-compare": 2,

    // Disallow use of the comma operator
    "no-sequences": 2,

    // Restrict what can be thrown as an exception
    "no-throw-literal": 2,

    // Disallow usage of expressions in statement position
    "no-unused-expressions": 2,

    // Disallow unnecessary '.call()' and '.apply()'
    "no-useless-call": 2, 

    // Disallow use of the 'void' operator
    "no-void": 2,

    // Disallow usage of configurable warning terms in comments -e.g. 'TODO' or 'FIXME'
    "no-warning-comments": [2, {
      "terms": [],
      "location": "start"
    }],

    // Disallow use of the 'with' statement
    "no-with": 2,

    // Require use of the second argument for 'parseInt()'
    "radix": 2,

    // Require declaration of all vars at the top of their containing scope
    "vars-on-top": 2, 

    // Require immediate function invocation to be wrapped in parentheses
    "wrap-iife": [2, "outside"],

    // Require or disallow Yoda conditions
    "yoda": [2, "never", {
      "exceptRange": true 
    }],

    // Controls location of Use Strict Directives
    "strict": [2, "global"],

    // Enforce or disallow variable initializations at definition
    "init-declarations": [2, "always"],

    // Disallow the catch clause parameter name being the same as a variable in the outer scope
    "no-catch-shadow": 2, 

    // Disallow deletion of variables (recommended)
    "no-delete-var": 2, 

    // Disallow labels that share a name with a variable
    "no-label-var": 2, 

    // Disallow shadowing of names such as 'arguments'
    "no-shadow-restricted-names": 2, 

    // Disallow declaration of variables already declared in the outer scope
    "no-shadow": 2, 

    // Disallow use of undefined when initializing variables (recommended)
    "no-undef-init": 2, 

    // Disallow use of undeclared variables unless mentioned in a /*global */ block (recommended)
    "no-undef": 1, 

    // Disallow use of 'undefined' variable
    "no-undefined": 1, 

    // Disallow declaration of variables that are not used in the code (recommended)
    "no-unused-vars": [2, {
      "vars": "all",
      "args": "all"
    }],
    
    // Disallow use of variables before they are defined
    "no-use-before-define": [2, "nofunc"],

    // Enforce 'return' after a callback
    "callback-return": 2, 

    // Enforce error handling in callbacks
    "handle-callback-err": 2,

    // Disallow mixing regular variable and required declarations
    "no-mixed-requires": [2, true],

    // Disallow use of 'new' operator with the 'require' function
    "no-new-require": 2,

    // Disallow string concatenation with '__dirname' and '__filename'
    "no-path-concat": 2
  },
  ecmaFeatures: {
    "arrowFunctions": true,
    "binaryLiterals": true,
    "blockBindings": true,
    "classes": true,
    "defaultParams": true,
    "destructuring": true,
    "forOf": true,
    "generators": true,
    "modules": true,
    "objectLiteralComputedProperties": true,
    "objectLiteralDuplicateProperties": true,
    "objectLiteralShorthandMethods": true,
    "objectLiteralShorthandProperties": true,
    "octalLiterals": true,
    "regexUFlag": true,
    "regexYFlag": true,
    "restParams": true,
    "spread": true,
    "superInFunctions": true,
    "templateStrings": true,
    "unicodeCodePointEscapes": true,
    "globalReturn": true,
    "experimentalObjectRestSpread": true
  },
  "env": {
    "browser": false,
    "node": true
  },
  "globals": {
    "console": true
  },
  "plugins": [
    "babel"
  ]
}