.eslintrc.js

module.exports = {
  env: {
    "browser": true,      // browser global variables.
    "node": true,         // Node.js global variables and Node.js-specific rules.
    "worker": false,      // web workers global variables.
    "amd": true,          // defines require() and define() as global variables as per the amd spec.
    "mocha": true,        // adds all of the Mocha testing global variables.
    "jasmine": false,     // adds all of the Jasmine testing global variables for version 1.3 and 2.0.
    "phantomjs": false,   // phantomjs global variables.
    "jquery": false,      // jquery global variables.
    "prototypejs": false, // prototypejs global variables.
    "shelljs": false,     // shelljs global variables.
    "meteor": false,      // meteor global variables.
    "mongo": false,       // mongo global variables.
    "applescript": false, // applescript global variables.
    "es6": true,          // enable all ECMAScript 6 features except for modules.

  },
  parserOptions: {
    sourceType: 'module',
    ecmaVersion: 6,
    ecmaFeatures: {
      "arrowFunctions": false,                   // enable arrow functions
      "binaryLiterals": false,                   // enable binary literals
      "blockBindings": false,                    // enable let and const (aka block bindings)
      "classes": false,                          // enable classes
      "defaultParams": false,                    // enable default function parameters
      "destructuring": false,                    // enable destructuring
      "forOf": false,                            // enable for-of loops
      "generators": false,                       // enable generators
      "modules": true,                           // enable modules and global strict mode
      "objectLiteralComputedProperties": false,  // enable computed object literal property names
      "objectLiteralDuplicateProperties": false, // enable duplicate object literal properties in strict mode
      "objectLiteralShorthandMethods": false,    // enable object literal shorthand methods
      "objectLiteralShorthandProperties": false, // enable object literal shorthand properties
      "octalLiterals": false,                    // enable octal literals
      "regexUFlag": false,                       // enable the regular expression u flag
      "regexYFlag": false,                       // enable the regular expression y flag
      "restParams": false,                       // enable the rest parameters
      "spread": false,                           // enable the spread operator
      "superInFunctions": false,                 // enable super references inside of functions
      "templateStrings": false,                  // enable template strings
      "unicodeCodePointEscapes": false,          // enable code point escapes
      "globalReturn": false,                     // allow return statements in the global scope
      "jsx": true                               // enable JSX
    }
  },
  rules: {
    // Possible Errors
    "comma-dangle": 0,             // disallow trailing commas in object literals
    "no-cond-assign": 0,           // disallow assignment in conditional expressions
    "no-console": 0,               // disallow use of console (off by default in the node environment)
    "no-constant-condition": 0,    // disallow use of constant expressions in conditions
    "no-control-regex": 0,         // disallow control characters in regular expressions
    "no-debugger": 0,              // disallow use of debugger
    "no-dupe-args": 0,             // disallow duplicate arguments in functions
    "no-dupe-keys": 0,             // disallow duplicate keys when creating object literals
    "no-duplicate-case": 0,        // disallow a duplicate case label
    "no-empty-character-class": 0, // disallow the use of empty character classes in regular expressions
    "no-empty": 0,                 // disallow empty statements
    "no-ex-assign": 0,             // disallow assigning to the exception in a catch block
    "no-extra-boolean-cast": 0,    // disallow double-negation boolean casts in a boolean context
    "no-extra-parens": 0,          // disallow unnecessary parentheses (off by default)
    "no-extra-semi": 2,            // disallow unnecessary semicolons
    "no-func-assign": 0,           // disallow overwriting functions written as function declarations
    "no-inner-declarations": 2,    // disallow function or variable declarations in nested blocks
    "no-invalid-regexp": 0,        // disallow invalid regular expression strings in the RegExp constructor
    "no-irregular-whitespace": 1,  // disallow irregular whitespace outside of strings and comments
    "no-negated-in-lhs": 0,        // disallow negation of the left operand of an in expression
    "no-obj-calls": 0,             // disallow the use of object properties of the global object (Math and JSON) as functions
    "no-regex-spaces": 0,          // disallow multiple spaces in a regular expression literal
    "no-reserved-keys": 0,         // disallow reserved words being used as object literal keys (off by default)
    "no-sparse-arrays": 0,         // disallow sparse arrays
    "no-unreachable": 0,           // disallow unreachable statements after a return, throw, continue, or break statement
    "use-isnan": 0,                // disallow comparisons with the value NaN
    "valid-jsdoc": 0,              // Ensure JSDoc comments are valid (off by default)
    "valid-typeof": 0,             // Ensure that the results of typeof are compared against a valid string
    "no-unexpected-multiline": 0,  // Avoid code that looks like two expressions but is actually one (off by default)


    // Best Practices
    "accessor-pairs": 0,        // enforces getter/setter pairs in objects (off by default)
    "block-scoped-var": 0,      // treat var statements as if they were block scoped (off by default)
    "complexity": 0,            // specify the maximum cyclomatic complexity allowed in a program (off by default)
    "consistent-return": 0,     // require return statements to either always or never specify values
    "curly": 2,                 // specify curly brace conventions for all control statements
    "default-case": 0,          // require default case in switch statements (off by default)
    "dot-notation": 0,          // encourages use of dot notation whenever possible
    "dot-location": 0,          // enforces consistent newlines before or after dots (off by default)
    "eqeqeq": [2, 'smart'],     // require the use of === and !==
    "guard-for-in": 0,          // make sure for-in loops have an if statement (off by default)
    "no-alert": 0,              // disallow the use of alert, confirm, and prompt
    "no-caller": 0,             // disallow use of arguments.caller or arguments.callee
    "no-div-regex": 0,          // disallow division operators explicitly at beginning of regular expression (off by default)
    "no-else-return": 0,        // disallow else after a return in an if (off by default)
    "no-empty-label": 0,        // disallow use of labels for anything other then loops and switches
    "no-eq-null": 0,            // 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": 0,         // disallow unnecessary function binding
    "no-fallthrough": 0,        // disallow fallthrough of case statements
    "no-floating-decimal": 0,   // disallow the use of leading or trailing decimal points in numeric literals (off by default)
    "no-implied-eval": 0,       // disallow use of eval()-like methods
    "no-iterator": 0,           // disallow usage of __iterator__ property
    "no-labels": 0,             // disallow use of labeled statements
    "no-lone-blocks": 0,        // disallow unnecessary nested blocks
    "no-loop-func": 0,          // disallow creation of functions within loops
    "no-multi-spaces": 1,       // disallow use of multiple spaces
    "no-multi-str": 0,          // disallow use of multiline strings
    "no-native-reassign": 0,    // disallow reassignments of native objects
    "no-new-func": 0,           // disallow use of new operator for Function object
    "no-new-wrappers": 2,       // disallows creating new instances of String, Number, and Boolean
    "no-new": 0,                // disallow use of new operator when not part of the assignment or comparison
    "no-octal-escape": 0,       // disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
    "no-octal": 0,              // disallow use of octal literals
    "no-param-reassign": 0,     // disallow reassignment of function parameters (off by default)
    "no-process-env": 0,        // disallow use of process.env (off by default)
    "no-proto": 0,              // disallow usage of __proto__ property
    "no-redeclare": 0,          // disallow declaring the same variable more then once
    "no-return-assign": 0,      // disallow use of assignment in return statement
    "no-script-url": 0,         // disallow use of javascript: urls
    "no-self-compare": 0,       // disallow comparisons where both sides are exactly the same (off by default)
    "no-sequences": 0,          // disallow use of comma operator
    "no-throw-literal": 0,      // restrict what can be thrown as an exception (off by default)
    "no-unused-expressions": 0, // disallow usage of expressions in statement position
    "no-void": 0,               // disallow use of void operator (off by default)
    "no-warning-comments": 0,   // disallow usage of configurable warning terms in comments, e.g. TODO or FIXME (off by default)
    "no-with": 2,               // disallow use of the with statement
    "radix": 0,                 // require use of the second argument for parseInt() (off by default)
    "vars-on-top": 0,           // requires to declare all vars on top of their containing scope (off by default)
    "wrap-iife": 0,             // require immediate function invocation to be wrapped in parentheses (off by default)
    "yoda": 0,                  // require or disallow Yoda conditions


    // Strict Mode
    "strict": 0,          // controls location of Use Strict Directives


    // Variables
    "no-catch-shadow": 0,            // 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": 0,              // disallow deletion of variables
    "no-label-var": 0,               // disallow labels that share a name with a variable
    "no-shadow": 0,                  // disallow declaration of variables already declared in the outer scope
    "no-shadow-restricted-names": 0, // disallow shadowing of names such as arguments
    "no-undef": 2,                   // disallow use of undeclared variables unless mentioned in a /*global */ block
    "no-undef-init": 0,              // disallow use of undefined when initializing variables
    "no-undefined": 0,               // disallow use of undefined variable (off by default)
    "no-unused-vars": 0,             // disallow declaration of variables that are not used in the code
    "no-use-before-define": [2, { 'functions': false }], // disallow use of variables before they are defined


    // Node.js
    "handle-callback-err": 0,   // enforces error handling in callbacks (off by default) (on by default in the node environment)
    "no-mixed-requires": 0,     // disallow mixing regular variable and require declarations (off by default) (on by default in the node environment)
    "no-new-require": 0,        // disallow use of new operator with the require function (off by default) (on by default in the node environment)
    "no-path-concat": 0,        // disallow string concatenation with __dirname and __filename (off by default) (on by default in the node environment)
    "no-process-exit": 0,       // disallow process.exit() (on by default in the node environment)
    "no-restricted-modules": 0, // restrict usage of specified node modules (off by default)
    "no-sync": 0,               // disallow use of synchronous methods (off by default)


    // Stylistic Issues
    "array-bracket-spacing": [2, "never"], // enforce spacing inside array brackets (off by default)
    "brace-style": [2, '1tbs', { 'allowSingleLine': true }], // enforce one true brace style (off by default)
    "camelcase": 2,                        // require camel case names
    "comma-spacing": 1,                    // enforce spacing before and after comma
    "comma-style": [2, 'last'],            // enforce one true comma style (off by default)
    "computed-property-spacing": 0,        // require or disallow padding inside computed properties (off by default)
    "consistent-this": 0,                  // enforces consistent naming when capturing the current execution context (off by default)
    "eol-last": 0,                         // 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": [1, 'expression'],       // enforces use of function declarations or expressions (off by default)
    "indent": [2, 2],                      // this option sets a specific tab width for your code (off by default)
    "key-spacing": 1,                      // enforces spacing between keys and values in object literal properties
    "lines-around-comment": 1,             // enforces empty lines around comments (off by default)
    "linebreak-style": 0,                  // disallow mixed 'LF' and 'CRLF' as linebreaks (off by default)
    "max-nested-callbacks": 0,             // specify the maximum depth callbacks can be nested (off by default)
    "new-cap": 0,                          // require a capital letter for constructors
    "new-parens": 0,                       // disallow the omission of parentheses when invoking a constructor with no arguments
    "new-parens": 0,                       // 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": 2,             // disallow use of the Array constructor
    "no-continue": 0,                      // disallow use of the continue statement (off by default)
    "no-inline-comments": 0,               // disallow comments inline after code (off by default)
    "no-lonely-if": 2,                     // disallow if as the only statement in an else block (off by default)
    "no-mixed-spaces-and-tabs": 2,         // disallow mixed spaces and tabs for indentation
    "no-multiple-empty-lines": 1,          // disallow multiple empty lines (off by default)
    "no-nested-ternary": 0,                // disallow nested ternary expressions (off by default)
    "no-new-object": 2,                    // disallow use of the Object constructor
    "no-spaced-func": 0,                   // disallow space between function identifier and application
    "no-ternary": 0,                       // disallow the use of ternary operators (off by default)
    "no-trailing-spaces": 0,               // disallow trailing whitespace at the end of lines
    "no-underscore-dangle": 0,             // disallow dangling underscores in identifiers
    "object-curly-spacing": [2, "never"],  // require or disallow padding inside curly braces (off by default)
    "one-var": [1, { 'uninitialized': 'never', 'initialized': 'never' }], // allow just one var statement per function (off by default)
    "operator-assignment": 0,              // require assignment operator shorthand where possible or prohibit it entirely (off by default)
    "operator-linebreak": 0,               // enforce operators to be placed before or after line breaks (off by default)
    "padded-blocks": 0,                    // enforce padding within blocks (off by default)
    "quote-props": 0,                      // require quotes around object literal property names (off by default)
    "quotes": [1, 'single'],               // specify whether double or single quotes should be used
    "semi-spacing": 1,                     // enforce spacing before and after semicolons
    "semi": 2,                             // require or disallow use of semicolons instead of ASI
    "sort-vars": 0,                        // sort variables within the same declaration block (off by default)
    "space-after-keywords": 0,             // require a space after certain keywords (off by default)
    "space-before-blocks": 1,              // require or disallow space before blocks (off by default)
    "space-before-function-paren": 0,      // require or disallow space before function opening parenthesis (off by default)
    "space-in-parens": 0,                  // require or disallow spaces inside parentheses (off by default)
    "space-infix-ops": 1,                  // require spaces around operators
    "space-return-throw-case": 0,          // require a space after return, throw, and case
    "space-unary-ops": 0,                  // require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
    "spaced-comment": 1,                   // require or disallow a space immediately following the                                                  // or /* in a comment (off by default)
    "wrap-regex": 0,                       // require regex literals to be wrapped in parentheses (off by default)


    // ECMAScript 6
    "constructor-super": 0,      // verify super() callings in constructors (off by default)
    "generator-star-spacing": 0, // enforce the spacing around the * in generator functions (off by default)
    "no-this-before-super": 0,   // disallow to use this/super before super() calling in constructors (off by default)
    "no-var": 0,                 // require let or const instead of var (off by default)
    "object-shorthand": 0,       // require method and property shorthand syntax for object literals (off by default)
    "prefer-const": 0,           // suggest using of const declaration for variables that are never modified after declared (off by default)


    // Legacy
    "max-depth": 0,        // specify the maximum depth that blocks can be nested (off by default)
    "max-len": [1, 80, 2], // specify the maximum length of a line in your program (off by default)
    "max-params": 0,       // limits the number of parameters that can be used in the function declaration. (off by default)
    "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": 0       // disallow use of unary operators, ++ and -- (off by default)
  }
};