Strict ESLint config for React, ES6 (based on Airbnb Code style) YAML Format

.eslintrc.yaml

parser: babel-eslint
env:
  browser: true
  node: true
  es6: true
ecmaFeactures:
  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
  spread: true
  superInFunctions: true
  templateStrings: true
  unicodeCodePointEscapes: true
  globalReturn: true
rules:
    #
    #Possible Errors
    # The following rules point out areas where you might have made mistakes.
    #
    comma-dangle: 2 #disallow or enforce trailing commas
    no-cond-assign: 2 # disallow assignment in conditional expressions
    no-console: 1 # disallow use of console (off by default in the node environment)
    no-constant-condition: 2 # disallow use of constant expressions in conditions
    no-control-regex: 2 # disallow control characters in regular expressions
    no-debugger: 2 # disallow use of debugger
    no-dupe-args: 2 # disallow duplicate arguments in functions
    no-dupe-keys: 2 # disallow duplicate keys when creating object literals
    no-duplicate-case: 2 # disallow a duplicate case label.
    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-extra-boolean-cast: 2 # disallow double-negation boolean casts in a boolean context
    no-extra-parens: # disallow unnecessary parentheses (off by default)
      - 0
      - all
      - ignoreJSX: all
      - returnAssign: false
    no-extra-semi: 2 # disallow unnecessary semicolons
    no-func-assign: 2 # disallow overwriting functions written as function declarations
    no-inner-declarations: 2 # disallow function or variable declarations in nested blocks
    no-invalid-regexp: 2 # disallow invalid regular expression strings in the RegExp constructor
    no-irregular-whitespace: 2 # disallow irregular whitespace outside of strings and comments
    no-negated-in-lhs: 2 # disallow negation of the left operand of an in expression
    no-obj-calls: 2 # disallow the use of object properties of the global object (Math and JSON) as functions
    no-regex-spaces: 2 # disallow multiple spaces in a regular expression literal
    no-sparse-arrays: 2 # disallow sparse arrays
    no-unreachable: 2 # disallow unreachable statements after a return throw continue or break statement
    use-isnan: 2 # disallow comparisons with the value NaN
    valid-jsdoc: 2 # Ensure JSDoc comments are valid (off by default)
    valid-typeof: 2 # Ensure that the results of typeof are compared against a valid string

    # Best Practices
    #
    # These are rules designed to prevent you from making mistakes.
    # They either prescribe a better way of doing something or help you avoid footguns.
    #
    block-scoped-var: 0 # treat var statements as if they were block scoped (off by default). 0: deep destructuring is not compatible https:#github.com/eslint/eslint/issues/1863
    complexity: 0 # specify the maximum cyclomatic complexity allowed in a program (off by default)
    consistent-return: 2 # require return statements to either always or never specify values
    curly: 2 # specify curly brace conventions for all control statements
    default-case: 2 # require default case in switch statements (off by default)
    dot-notation: 2 # encourages use of dot notation whenever possible
    eqeqeq: 2 # require the use of === and !==
    guard-for-in: 2 # make sure for-in loops have an if statement (off by default)
    no-alert: 2 # disallow the use of alert confirm and prompt
    no-caller: 2 # disallow use of arguments.caller or arguments.callee
    no-div-regex: 2 # disallow division operators explicitly at beginning of regular expression (off by default)
    no-else-return: 2 # disallow else after a return in an if (off by default)
    no-eq-null: 2 # disallow comparisons to null without a type-checking operator (off by default)
    no-eval: 2 # disallow use of eval()
    no-extend-native: 2 # disallow adding to native types
    no-extra-bind: 2 # disallow unnecessary function binding
    no-fallthrough: 2 # disallow fallthrough of case statements
    no-floating-decimal: 2 # disallow the use of leading or trailing decimal points in numeric literals (off by default)
    no-implied-eval: 2 # disallow use of eval()-like methods
    no-iterator: 2 # disallow usage of __iterator__ property
    no-labels: # disallow use of labeled statements disallow use of labels for anything other then loops and switches
      - 2
      - allowLoop : true
        allowSwitch : true
    no-lone-blocks: 2 # disallow unnecessary nested blocks
    no-loop-func: 2 # disallow creation of functions within loops
    no-multi-spaces: 2 # disallow use of multiple spaces
    no-multi-str: 2 # disallow use of multiline strings
    no-native-reassign: 2 # disallow reassignments of native objects
    no-new: 2 # disallow use of new operator when not part of the assignment or comparison
    no-new-func: 2 # disallow use of new operator for Function object
    no-new-wrappers: 2 # disallows creating new instances of StringNumber and Boolean
    no-octal: 2 # disallow use of octal literals
    no-octal-escape: 2 # disallow use of octal escape sequences in string literals such as var foo = Copyright \251;
    no-param-reassign: 2 # disallow reassignment of function parameters (off by default)
    no-process-env: 0 # disallow use of process.env (off by default)
    no-proto: 2 # disallow usage of __proto__ property
    no-redeclare: 2 # disallow declaring the same variable more then once
    no-return-assign: 2 # disallow use of assignment in return statement
    no-script-url: 2 # disallow use of javascript: urls.
    no-self-compare: 2 # disallow comparisons where both sides are exactly the same (off by default)
    no-sequences: 2 # disallow use of comma operator
    no-throw-literal: 2 # restrict what can be thrown as an exception (off by default)
    no-unused-expressions: 2 # disallow usage of expressions in statement position
    no-void: 2 # disallow use of void operator (off by default)
    no-warning-comments: # disallow usage of configurable warning terms in comments: 2 # e.g. TODO or FIXME (off by default)
      - 0
      - terms:
        - todo
        - fixme
        location: start
    no-with: 2 # disallow use of the with statement
    radix: 2 # require use of the second argument for parseInt() (off by default)
    vars-on-top: 2 # requires to declare all vars on top of their containing scope (off by default)
    wrap-iife: 2 # require immediate function invocation to be wrapped in parentheses (off by default)
    yoda: 2 # require or disallow Yoda conditions

    #
    # Strict Mode
    #
    # These rules relate to using strict mode.
    #
    strict: 0 # controls location of Use Strict Directives. 0: required by `babel-eslint`

    #
    # Variables
    #
    # These rules have to do with variable declarations.
    #
    no-catch-shadow: 2 # disallow the catch clause parameter name being the same as a variable in the outer scope (off by default in the node environment)
    no-delete-var: 2 # disallow deletion of variables
    no-label-var: 2 # disallow labels that share a name with a variable
    no-shadow: 2 # disallow declaration of variables already declared in the outer scope
    no-shadow-restricted-names: 2 # disallow shadowing of names such as arguments
    no-undef: 2 # disallow use of undeclared variables unless mentioned in a /*global */ block
    no-undef-init: 2 # disallow use of undefined when initializing variables
    no-undefined: 2 # disallow use of undefined variable (off by default)
    no-unused-vars: 1 # disallow declaration of variables that are not used in the code
    no-use-before-define: 2 # disallow use of variables before they are defined

    #
    #Stylistic Issues
    #
    # These rules are purely matters of style and are quite subjective.
    #
    indent: # this option sets a specific tab width for your code (off by default)
      - 1
      - 2
    brace-style: 1 # enforce one true brace style (off by default)
    camelcase: 1 # require camel case names
    comma-spacing: # enforce spacing before and after comma
      - 1
      - before: false
        after: true
    comma-style: # enforce one true comma style (off by default)
      - 1
      - last
    consistent-this: # enforces consistent naming when capturing the current execution context (off by default)
      - 1
      - _this
    eol-last: 1 # enforce newline at the end of file with no multiple empty lines
    func-names: 0 # require function expressions to have a name (off by default)
    func-style: 0 # enforces use of function declarations or expressions (off by default)
    arrow-spacing: #normalize style of spacing before/after an arrow function’s arrow
      - 1
      - before: true
        after: true
    array-bracket-spacing: 0 #require or disallow spaces between array brackets and other tokens
    object-curly-spacing: 0 #require or disallow spaces between curly braces
    key-spacing: # enforces spacing between keys and values in object literal properties
      - 1
      - beforeColon: false
        afterColon: true
    max-nested-callbacks:
      - 1
      - 3 # specify the maximum depth callbacks can be nested (off by default)
    new-cap: # require a capital letter for constructors
      - 1
      - newIsCap: true
        capIsNew: false
    new-parens: 1 # disallow the omission of parentheses when invoking a constructor with no arguments
    newline-after-var: 0 # allow/disallow an empty newline after var statement (off by default)
    no-array-constructor: 1 # disallow use of the Array constructor
    no-inline-comments: 1 # disallow comments inline after code (off by default)
    no-lonely-if: 1 # disallow if as the only statement in an else block (off by default)
    no-mixed-spaces-and-tabs: 1 # disallow mixed spaces and tabs for indentation
    no-multiple-empty-lines:  # disallow multiple empty lines (off by default)
      - 1
      - max: 2
    no-nested-ternary: 1 # disallow nested ternary expressions (off by default)
    no-new-object: 1 # disallow use of the Object constructor
    no-spaced-func: 1 # disallow space between function identifier and application
    no-ternary: 0 # disallow the use of ternary operators (off by default)
    no-trailing-spaces: 1 # disallow trailing whitespace at the end of lines
    no-underscore-dangle: 1 # disallow dangling underscores in identifiers
    one-var: # allow just one var statement per function (off by default)
      - 1
      - never
    operator-assignment: # require assignment operator shorthand where possible or prohibit it entirely (off by default)
      - 1
      - never
    padded-blocks: # enforce padding within blocks (off by default)
      - 1
      - never
    quote-props: # require quotes around object literal property names (off by default)
      - 1
      - as-needed
    quotes: # specify whether double or single quotes should be used
      - 1
      - single
    semi: # require or disallow use of semicolons instead of ASI
      - 1
      - always
    semi-spacing: # enforce spacing before and after semicolons
      - 1
      - before: false
        after: true
    sort-vars: 0 # sort variables within the same declaration block (off by default)
    keyword-spacing: # require a space after certain keywords (off by default)
      - 1
      - before: true
    space-before-blocks: # require or disallow space before blocks (off by default)
      - 1
      - always
    space-before-function-paren: # require or disallow space before function opening parenthesis (off by default)
      - 1
      - anonymous: always
        named: never
    spaced-comment: # require or disallow spaces inside brackets (off by default)
      - 1
      - never
    space-in-parens: # require or disallow spaces inside parentheses (off by default)
      - 1
      - never
    space-infix-ops: # require spaces around operators
      - 1
      - int32Hint: false
    space-unary-ops: # Require or disallow spaces before/after unary operators (words on by default nonwords off by default)
      - 1
      - words: true
        nonwords: false
    wrap-regex: 0 # require regex literals to be wrapped in parentheses (off by default)

    #
    # ECMAScript 6
    #
    # These rules are only relevant to ES6 environments and are off by default.
    #
    no-var: 2 # require let or const instead of var (off by default)
    generator-star-spacing: # enforce the spacing around the * in generator functions (off by default)
      - 2
      - before
    #
    # Legacy
    #
    # The following rules are included for compatibility with JSHint and JSLint.
    # While the names of the rules may not match up with the JSHint/JSLint counterpart,
    # the functionality is the same.
    #
    max-depth: # specify the maximum depth that blocks can be nested (off by default)
      - 2
      - 3
    max-len: # specify the maximum length of a line in your program (off by default)
      - 2
      - 100
      - 2
    max-params: # limits the number of parameters that can be used in the function declaration. (off by default)
      - 2
      - 5
    max-statements: 0 # specify the maximum number of statement allowed in a function (off by default)
    no-bitwise: 0 # disallow use of bitwise operators (off by default)
    no-plusplus: 2 # disallow use of unary operators, ++ and -- (off by default)

package.json

{
  "name": "master-tau",
  "version": "1.0.1",
  "private": true,
  "main": "start.js",
  "scripts": {
    "start": "node --use_strict start.js",
    "lint": "npm run lint:node && npm run lint:browser",
    "lint:node": "eslint --config=./.eslintrc *.js scripts/*.js",
    "lint:browser": "eslint --config=./src/.eslintrc src/**/**/*.js utils/**/**/*.js app.js start.js"
  },
  "author": "DLFinis <dln.finis@gmail.com>",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.16.0",
    "express": "^4.14.0",
    "request": "^2.79.0"
  },
  "devDependencies": {
    "babel-eslint": "^7.1.1",
    "eslint": "^3.14.1",
    "eslint-loader": "^1.6.1",
    "winston": "^2.3.1"
  }
}