.eslintrc

{
    "root": true,
    "parser": "babel-eslint",
    "extends": "eslint:recommended",
    "env": {
        "es6": true,
        "node": true
    },
    "globals": {},
    "plugins": [],
    "overrides": [
        {
            "files": ["*.integration.js","*.spec.js"],
            "rules": {
              "no-magic-numbers": "off"
            }
        },
        {
            "files": ["*.js"],
            "rules": {
              "prefer-arrow-callback": 0,
              "no-process-env": 0,
              "no-warning-comments": 0,
              "prefer-template": 0,
              "no-sync": 0
            }
        }
    ],
    "rules": {
        //Possible Errors
        "comma-dangle": 0,                                          //disallow or enforce trailing commas
        "no-cond-assign": 2,                                        //disallow assignment in conditional expressions
        "no-console": 2,                                            //disallow use of console in the node environment
        "no-constant-condition": 1,                                 //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-character-class": 2,                              //disallow the use of empty character classes in regular expressions
        "no-empty": 2,                                              //disallow empty statements
        "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": 2,                                       //disallow unnecessary parentheses
        "no-extra-semi": 2,                                         //disallow unnecessary semicolons
        "no-func-assign": 2,                                        //disallow overwriting functions written as function declarations
        "no-inner-declarations": 1,                                 //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-prototype-builtins": 2,                                 //Disallow use of Object.prototypes builtins directly
        "no-regex-spaces": 2,                                       //disallow multiple spaces in a regular expression literal
        "no-sparse-arrays": 1,                                      //disallow sparse arrays
        "no-unexpected-multiline": 2,                               //Avoid code that looks like two expressions but is actually one
        "no-unreachable": 2,                                        //disallow unreachable statements after a return, throw, continue, or break statement
        "no-unsafe-finally": 2,                                     //disallow control flow statements in finally blocks
        "use-isnan": 2,                                             //disallow comparisons with the value NaN
        "valid-jsdoc": 2,                                           //Ensure JSDoc comments are valid
        "valid-typeof": 2,                                          //Ensure that the results of typeof are compared against a valid string

        //Best Practices
        "accessor-pairs": 0,                                        //Enforces getter/setter pairs in objects
        "array-callback-return": 2,                                 //Enforces return statements in callbacks of array"s methods
        "block-scoped-var": 2,                                      //treat var statements as if they were block scoped
        "complexity": 1,                                            //specify the maximum cyclomatic complexity allowed in a program
        "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": 2,                                          //require default case in switch statements
        "dot-location": [2, "property"],                            //enforces consistent newlines before or after dots
        "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
        "no-alert": 2,                                              //disallow the use of alert, confirm, and prompt
        "no-caller": 2,                                             //disallow use of arguments.caller or arguments.callee
        "no-case-declarations": 0,                                  //disallow lexical declarations in case clauses
        "no-div-regex": 2,                                          //disallow division operators explicitly at beginning of regular expression
        "no-else-return": 0,                                        //disallow else after a return in an if
        "no-empty-function": 2,                                     //disallow use of empty functions
        "no-empty-pattern": 2,                                      //disallow use of empty destructuring patterns
        "no-eq-null": 2,                                            //disallow comparisons to null without a type-checking operator
        "no-eval": 2,                                               //disallow use of eval()
        "no-extend-native": 0,                                      //disallow adding to native types
        "no-extra-bind": 1,                                         //disallow unnecessary function binding
        "no-extra-label": 2,                                        //disallow unnecessary labels
        "no-fallthrough": 2,                                        //disallow fallthrough of case statements
        "no-floating-decimal": 2,                                   //disallow the use of leading or trailing decimal points in numeric literals
        "no-implicit-coercion": 0,                                  //disallow the type conversions with shorter notations
        "no-implicit-globals": 0,                                   //disallow var and named functions in global scope
        "no-implied-eval": 2,                                       //disallow use of eval()-like methods
        "no-invalid-this": 2,                                       //disallow this keywords outside of classes or class-like objects
        "no-iterator": 2,                                           //disallow usage of __iterator__ property
        "no-labels": 2,                                             //disallow use of labeled statements
        "no-lone-blocks": 2,                                        //disallow unnecessary nested blocks
        "no-loop-func": 2,                                          //disallow creation of functions within loops
        "no-magic-numbers": [2, { "ignore": [0,1,-1] }],            //disallow the use of magic numbers other than 0 or 1
        "no-multi-spaces": 2,                                       //disallow use of multiple spaces
        "no-multi-str": 0,                                          //disallow use of multiline strings
        "no-native-reassign": 2,                                    //disallow reassignments of native objects
        "no-new-func": 1,                                           //disallow use of new operator for Function object
        "no-new-wrappers": 2,                                       //disallows creating new instances of String,Number, and Boolean
        "no-new": 2,                                                //disallow use of the new operator when not part of an 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": 2,                                     //disallow reassignment of function parameters
        "no-process-env": 2,                                        //disallow use of process.env
        "no-proto": 2,                                              //disallow usage of __proto__ property
        "no-redeclare": 2,                                          //disallow declaring the same variable more than once
        "no-return-assign": 2,                                      //disallow use of assignment in return statement
        "no-script-url": 2,                                         //disallow use of javascript: urls.
        "no-self-assign": 2,                                        //disallow assignments where both sides are exactly the same
        "no-self-compare": 2,                                       //disallow comparisons where both sides are exactly the same
        "no-sequences": 2,                                          //disallow use of the comma operator
        "no-throw-literal": 0,                                      //restrict what can be thrown as an exception
        "no-unmodified-loop-condition": 2,                          //disallow unmodified conditions of loops
        "no-unused-expressions": 0,                                 //disallow usage of expressions in statement position
        "no-unused-labels": 2,                                      //disallow unused labels
        "no-useless-call": 2,                                       //disallow unnecessary .call() and .apply()
        "no-useless-concat": 2,                                     //disallow unnecessary concatenation of literals or template literals
        "no-useless-escape": 2,                                     //disallow unnecessary escape characters
        "no-void": 0,                                               //disallow use of the void operator
        "no-warning-comments": 1,                                   //disallow usage of configurable warning terms in comments (e.g. TODO or FIXME)
        "no-with": 2,                                               //disallow use of the with statement
        "radix": 2,                                                 //require use of the second argument for parseInt()
        "vars-on-top": 0,                                           //require declaration of all vars at the top of their containing scope
        "wrap-iife": 2,                                             //require immediate function invocation to be wrapped in parentheses
        "yoda": 2,                                                  //require or disallow Yoda conditions

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

        //Variables
        "init-declarations": 0,                                     //enforce or disallow variable initializations at definition
        "no-catch-shadow": 2,                                       //disallow the catch clause parameter name being the same as a variable in the outer scope
        "no-delete-var": 2,                                         //disallow deletion of variables
        "no-label-var": 2,                                          //disallow labels that share a name with a variable
        "no-restricted-globals": 0,                                 //restrict usage of specified global variables
        "no-shadow-restricted-names": 2,                            //disallow shadowing of names such as arguments
        "no-shadow": [2, {"allow": ["err"]}],                       //disallow declaration of variables already declared in the outer scope
        "no-undef-init": 2,                                         //disallow use of undefined when initializing variables
        "no-undef": 2,                                              //disallow use of undeclared variables unless mentioned in a /*global */ block
        "no-undefined": 0,                                          //disallow use of undefined variable
        "no-unused-vars": 2,                                        //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 and CommonJS
        "callback-return": 2,                                       //enforce return after a callback
        "global-require": 0,                                        //enforce require() on top-level module scope
        "handle-callback-err": 2,                                   //enforce error handling in callbacks
        "no-mixed-requires": 2,                                     //disallow mixing regular variable and require declarations
        "no-new-require": 2,                                        //disallow use of new operator with the require function
        "no-path-concat": 2,                                        //disallow string concatenation with __dirname and __filename
        "no-process-exit": 2,                                       //disallow process.exit()
        "no-restricted-imports": 0,                                 //restrict usage of specified node imports
        "no-restricted-modules": 0,                                 //restrict usage of specified node modules
        "no-sync": 1,                                               //disallow use of synchronous methods

        //Stylistic Issues
        "array-bracket-spacing": [2, "never"],                      //enforce spacing inside array brackets
        "block-spacing": 0,                                         //disallow or enforce spaces inside of single line blocks
        "brace-style": 2,                                           //enforce one true brace style
        "camelcase": 1,                                             //require camel case names
        "comma-spacing": [2, {"before": false, "after": true}],     //enforce spacing before and after comma
        "comma-style": 2,                                           //enforce one true comma style
        "computed-property-spacing": 2,                             //require or disallow padding inside computed properties
        "consistent-this": 2,                                       //enforce consistent naming when capturing the current execution context
        "eol-last": 2,                                              //enforce newline at the end of file, with no multiple empty lines
        "func-names": 0,                                            //require function expressions to have a name
        "func-style": 0,                                            //enforce use of function declarations or expressions
        "id-blacklist": 0,                                          //blacklist certain identifiers to prevent them being used
        "id-length": [2, {                                          //this option enforces minimum and maximum identifier lengths (variable names, property names etc.)
            "min": 2,
            "max": 25,
            "exceptions": ["_"]
        }],
        "id-match": 0,                                              //require identifiers to match the provided regular expression
        "indent": ["error", 2],                                     //specify tab or space width for your code
        "jsx-quotes": 0,                                            //specify whether double or single quotes should be used in JSX attributes
        "key-spacing": 2,                                           //enforce spacing between keys and values in object literal properties
        "keyword-spacing": [2, {
            "before": true,
            "after": true
        }],                                                         //enforce spacing before and after keywords
        "linebreak-style": 2,                                       //disallow mixed "LF" and "CRLF" as linebreaks
        "lines-around-comment":  ["error", {
            "beforeLineComment": true,
            "allowBlockStart": true
            }
        ],                                                          //enforce empty lines around comments
        "max-depth": 1,                                             //specify the maximum depth that blocks can be nested
        "max-len": [1, 120],                                        //specify the maximum length of a line in your program
        "max-lines": [1, 500],                                      //enforce a maximum file length
        "max-nested-callbacks": 2,                                  //specify the maximum depth callbacks can be nested
        "max-params": [1, 5],                                       //limits the number of parameters that can be used in the function declaration.
        "max-statements": [1, 50],                                  //specify the maximum number of statement allowed in a function
        "max-statements-per-line": 1,                               //enforce a maximum number of statements allowed per line
        "new-cap": 0,                                               //require a capital letter for constructors
        "new-parens": 2,                                            //disallow the omission of parentheses when invoking a constructor with no arguments
        "newline-after-var": 0,                                     //require or disallow an empty newline after variable declarations
        "newline-before-return": 2,                                 //require newline before return statement
        "newline-per-chained-call": 0,                              //enforce newline after each call when chaining the calls
        "no-array-constructor": 2,                                  //disallow use of the Array constructor
        "no-bitwise": 0,                                            //disallow use of bitwise operators
        "no-continue": 0,                                           //disallow use of the continue statement
        "no-inline-comments": 0,                                    //disallow comments inline after code
        "no-lonely-if": 2,                                          //disallow if as the only statement in an else block
        "no-mixed-operators": 0,                                    //disallow mixes of different operators
        "no-mixed-spaces-and-tabs": 2,                              //disallow mixed spaces and tabs for indentation
        "no-multiple-empty-lines": 2,                               //disallow multiple empty lines
        "no-negated-condition": 0,                                  //disallow negated conditions
        "no-nested-ternary": 2,                                     //disallow nested ternary expressions
        "no-new-object": 2,                                         //disallow the use of the Object constructor
        "no-plusplus": 0,                                           //disallow use of unary operators, ++ and --
        "no-restricted-syntax": 0,                                  //disallow use of certain syntax in code
        "no-spaced-func": 2,                                        //disallow space between function identifier and application
        "no-ternary": 0,                                            //disallow the use of ternary operators
        "no-trailing-spaces": 2,                                    //disallow trailing whitespace at the end of lines
        "no-underscore-dangle": 0,                                  //disallow dangling underscores in identifiers
        "no-unneeded-ternary": 2,                                   //disallow the use of ternary operators when a simpler alternative exists
        "no-whitespace-before-property": 2,                         //disallow whitespace before properties
        "object-curly-newline": 2,                                  //enforce consistent line breaks inside braces
        "object-curly-spacing": 2,                                  //require or disallow padding inside curly braces
        "object-property-newline": [2, {                            //enforce placing object properties on either one line or all on separate lines
            "allowAllPropertiesOnSameLine": true
            }
        ],
        "one-var": [2, "never"],                                    //require or disallow one variable declaration per function
        "one-var-declaration-per-line": 2,                          //require or disallow an newline around variable declarations
        "operator-assignment": 0,                                   //require assignment operator shorthand where possible or prohibit it entirely
        "operator-linebreak": [1, "before"],                        //enforce operators to be placed before or after line breaks
        "padded-blocks": 0,                                         //enforce padding within blocks
        "quote-props": [2, "as-needed"],                            //require quotes around object literal property names
        "quotes": [2, "single"],                                    //specify whether backticks, double or single quotes should be used
        "require-jsdoc": 0,                                         //Require JSDoc comment
        "semi-spacing": 2,                                          //enforce spacing before and after semicolons
        "sort-imports": 0,                                          //sort import declarations within module
        "semi": 2,                                                  //require or disallow use of semicolons instead of ASI
        "sort-vars": 0,                                             //sort variables within the same declaration block
        "space-before-blocks": 2,                                   //require or disallow a space before blocks
        "space-before-function-paren": [2, "never"],                //require or disallow a space before function opening parenthesis
        "space-in-parens": 2,                                       //require or disallow spaces inside parentheses
        "space-infix-ops": 2,                                       //require spaces around operators
        "space-unary-ops": 2,                                       //require or disallow spaces before/after unary operators
        "spaced-comment": [2, "always", { "exceptions": ["*"] }],   //require or disallow a space immediately following the // or /* in a comment
        "unicode-bom": 0,                                           //require or disallow the Unicode BOM
        "wrap-regex": 0,                                            //require regex literals to be wrapped in parentheses

        //ECMAScript 6
        "arrow-body-style": [2, "as-needed"],                       //require braces in arrow function body
        "arrow-parens": [2, "as-needed"],                           //require parens in arrow function arguments
        "arrow-spacing": 2,                                         //require space before/after arrow function"s arrow
        "constructor-super": 2,                                     //verify calls of super() in constructors
        "generator-star-spacing": 0,                                //enforce spacing around the * in generator functions
        "no-class-assign": 2,                                       //disallow modifying variables of class declarations
        "no-confusing-arrow": 2,                                    //disallow arrow functions where they could be confused with comparisons
        "no-const-assign": 2,                                       //disallow modifying variables that are declared using const
        "no-dupe-class-members": 2,                                 //disallow duplicate name in class members
        "no-duplicate-imports": 2,                                  //disallow duplicate module imports
        "no-new-symbol": 2,                                         //disallow use of the new operator with the Symbol object
        "no-this-before-super": 2,                                  //disallow use of this/super before calling super() in constructors.
        "no-useless-computed-key": 2,                               //disallow unnecessary computed property keys in object literals
        "no-useless-constructor": 2,                                //disallow unnecessary constructor
        "no-useless-rename": 2,                                     //disallow renaming import, export, and destructured assignments to the same name
        "no-var": 0,                                                //require let or const instead of var
        "object-shorthand": 1,                                      //require method and property shorthand syntax for object literals
        "prefer-arrow-callback": 1,                                 //suggest using arrow functions as callbacks
        "prefer-const": 1,                                          //suggest using const declaration for variables that are never modified after declared
        "prefer-rest-params": 1,                                    //suggest using the rest parameters instead of arguments
        "prefer-spread": 1,                                         //suggest using the spread operator instead of .apply().
        "prefer-template": 1,                                       //suggest using template literals instead of strings concatenation
        "require-yield": 0,                                         //disallow generator functions that do not have yield
        "rest-spread-spacing": ["error", "never"],                  //enforce spacing between rest and spread operators and their expressions
        "template-curly-spacing": 2,                                //enforce spacing around embedded expressions of template strings
        "yield-star-spacing": [2, "after"]                          //enforce spacing around the * in yield* expressions
    }
}