.eslintrc

{
  "parser": "babel-eslint",
  "env": {
    "browser": true,
    "node": true,
    "es6": true
  },
  "rules": {
    "comma-dangle": 0,                // Disallow or enforce trailing commas
    "no-cond-assign": 2,              // Disallow assignment in conditional expressions
    "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": 0,             // Disallow unnecessary parentheses (off by default)
    "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-reserved-keys": 0,            // Disallow reserved words being used as object literal keys (off by default)
    "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-typeof": 2,                // Ensure that the results of typeof are compared against a valid string


    "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)
    "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-empty-label": 2,              // Disallow use of labels for anything other then loops and switches
    "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": 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-multi-str": 2,                // Disallow use of multiline strings
    "no-multi-spaces": [0],           // 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 String,Number, 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-process-env": 2,              // 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-void": 2,                     // Disallow use of void operator (off by default)
    "no-with": 2,                     // Disallow use of the with statement
    "radix": 2,                       // Require use of the second argument for parseInt() (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

    "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-shadow": 0,                   // 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-unused-vars": 2,              // Disallow declaration of variables that are not used in the code
    "no-use-before-define": 0,

    "indent": [1, 2],                 // This option sets a specific tab width for your code (off by default)
    "brace-style": 1,                 // Enforce one true brace style (off by default)
    "camelcase": 1,                   // Require camel case names
    "comma-spacing": [1, {"before": false, "after": true}], // enforce spacing before and after comma
    "comma-style": [1, "last"],       // Enforce one true comma style (off by default)
    "consistent-this": [1, "_this"],  // Enforces consistent naming when capturing the current execution context (off by default)
    "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)
    "key-spacing": [1, {"beforeColon": false, "afterColon": true}], // enforces spacing between keys and values in object literal properties
    "max-nested-callbacks": [1, 3],   // Specify the maximum depth callbacks can be nested (off by default)
    "new-cap": [1, {newIsCap: true, capIsNew: false}], // require a capital letter for constructors
    "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": 0,          // 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": [1, {"max": 2}], // disallow multiple empty lines (off by default)
    "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": 0,        // Disallow dangling underscores in identifiers
    "one-var": [1, "never"],          // Allow just one var statement per function (off by default)
    "operator-assignment": [1, "never"], // Require assignment operator shorthand where possible or prohibit it entirely (off by default)
    "padded-blocks": [0, "never"],        // Enforce padding within blocks (off by default)
    "quote-props": [1, "as-needed"],      // Require quotes around object literal property names (off by default)
    "quotes": [1, "single"],              // Specify whether double or single quotes should be used
    "semi": [1, "always"],                // Require or disallow use of semicolons instead of ASI
    "semi-spacing": [1, {"before": false, "after": true}], // enforce spacing before and after semicolons
    "space-before-blocks": [1, "always"], // Require or disallow space before blocks (off by default)
    "space-in-brackets": [0, "never"],    // Require or disallow spaces inside brackets (off by default)
    "space-in-parens": [1, "never"],      // Require or disallow spaces inside parentheses (off by default)
    "space-infix-ops": [1, {}],     // Require spaces around operators
    "space-return-throw-case": [1], // require a space after return, throw, and case
    "space-unary-ops": [1, {"words": true, "nonwords": false}], // Require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
    "spaced-comment": [1, "always"], // Require or disallow a space immediately following the // in a line comment (off by default)
    "wrap-regex": 0,                      // Require regex literals to be wrapped in parentheses (off by default)

    "no-var": 2,                              // Require let or const instead of var (off by default)

    "max-depth": [2, 3],              // Specify the maximum depth that blocks can be nested (off by default)
    "max-len": [2, 120, 2],           // Specify the maximum length of a line in your program (off by default)
    "max-params": [2, 5],             // 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)
  }
}