.eslintrc

# which environments your script is designed to run in. Each environment brings with it a certain set of global variables and rules that are enabled by default.
env:
    browser: true # - browser global variables.
    #node: true # - Node.js global variables and Node.js-specific rules.
    #worker: true # - 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: true # - adds all of the Jasmine testing global variables for version 1.3 and 2.0.
    #phantomjs: true # - phantomjs global variables.
    #jquery: true # - jquery global variables.
    #prototypejs: true # - prototypejs global variables.
    #shelljs: true # - shelljs global variables.
    #meteor: true # - meteor global variables.
    #mongo: true # - mongo global variables.
    #applescript: true # - applescript global variables.
    #es6: true # - enable all ECMAScript 6 features except for modules.


ecmaFeatures:
    # arrowFunctions: true # - enable arrow functions
    # binaryLiterals: true # - enable binary literals
    # blockBindings: true # - enable let and const (aka block bindings)
    # classes: true # - enable classes
    # defaultParams: true # - enable default function parameters
    # destructuring: true # - enable destructuring
    # forOf: true # - enable for-of loops
    # generators: true # - enable generators
    # modules: true # - enable modules and global strict mode
    # objectLiteralComputedProperties: true # - enable computed object literal property names
    # objectLiteralDuplicateProperties: true # - enable duplicate object literal properties in strict mode
    # objectLiteralShorthandMethods: true # - enable object literal shorthand methods
    # objectLiteralShorthandProperties: true # - enable object literal shorthand properties
    # octalLiterals: true # - enable octal literals
    # regexUFlag: true # - enable the regular expression u flag
    # regexYFlag: true # - enable the regular expression y flag
    # restParams: true # - enable the rest parameters
    # spread: true # - enable the spread operator
    # superInFunctions: true # - enable super references inside of functions
    # templateStrings: true # - enable template strings
    # unicodeCodePointEscapes: true # - enable code point escapes
    # globalReturn: true # - allow return statements in the global scope
    jsx: false # - enable JSX


# the additional global variables your script accesses during execution.
globals:
    var1: true
    var2: false

# which rules are enabled and at what error level.
rules:
    # Errors
    comma-dangle: [1, "never"] ## - disallow or enforce trailing commas
    no-cond-assign: [2, "except-parens"] # - disallow assignment in conditional expressions
    no-console: 0 # - 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: 1 # - 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: 1 # - 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: 1 # - disallow double-negation boolean casts in a boolean context
    no-extra-parens: 1 # - 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: 1 # - disallow multiple spaces in a regular expression literal
    no-reserved-keys: 1 # - 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-jsdoc: 1 # - Ensure JSDoc comments are valid (off by default)
    valid-typeof: 1 # - Ensure that the results of typeof are compared against a valid string
    no-unexpected-multiline: 2 # - Avoid code that looks like two expressions but is actually one (off by default)

    # Best Practices

    accessor-pairs: 2 # - 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: 2 # - require return statements to either always or never specify values
    curly: [2, "all"] # - specify curly brace conventions for all control statements
    default-case: 2 # - require default case in switch statements (off by default)
    dot-notation: [2, {"allowPattern": "^[a-z]+(_[a-z]+)+$"}] # - encourages use of dot notation whenever possible
    dot-location: [2, "object"] # - enforces consistent newlines before or after dots (off by default)
    eqeqeq: [2, "allow-null"] # - require the use of === and !==
    guard-for-in: 1 # - 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: 1 # - disallow else after a return in an if (off by default)
    no-empty-label: 2 # - disallow use of labels for anything other than 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: 2 # - disallow unnecessary function binding
    no-fallthrough: 1 # - disallow fallthrough of case statements
    no-floating-decimal: 1 # - 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-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-func: 2 # - 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 new operator when not part of the assignment or comparison
    no-octal-escape: 2 # - disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
    no-octal: 2 # - 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: 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-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: 0 # - restrict what can be thrown as an exception (off by default)
    no-unused-expressions: 2 # - 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: 2 # - requires to declare all vars on top of their containing scope (off by default)
    wrap-iife: [2, "any"] # - require immediate function invocation to be wrapped in parentheses (off by default)
    yoda: 0 # - require or disallow Yoda conditions

    # Strict mode
    strict: 2

    # Variables
    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-restricted-names: 2 # - disallow shadowing of names such as arguments
    no-shadow: 2 # - 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: 2 # - disallow use of undefined variable (off by default)
    no-unused-vars: 2 # - disallow declaration of variables that are not used in the code
    no-use-before-define: 2 # - disallow u

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

    # ES6
    # constructor-super: # - verify super() callings in constructors (off by default)
    # generator-star-spacing: # - enforce the spacing around the * in generator functions (off by default)
    # generator-star: # - (deprecated) enforce the position of the * in generator functions (off by default)
    # no-this-before-super: # - disallow to use this/super before super() calling in constructors. (off by default)
    # no-var: # - require let or const instead of var (off by default)
    # object-shorthand: # - require method and property shorthand syntax for object literals (off by default)
    # prefer-const: # - suggest using of const declaration for variables that are never modified after declared (off by default)


    # Stylistic
    array-bracket-spacing: 0 # - enforce spacing inside array brackets (off by default)
    brace-style: [2, "1tbs"] # - enforce one true brace style (off by default)
    camelcase: 2 # - require camel case names
    comma-spacing: [2, {"before": false, "after": true}] # - 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 # [2, "root"] # - enforces consistent naming when capturing the current execution context (off by default)
    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 (off by default)
    func-style: 0 # - enforces use of function declarations or expressions (off by default)
    indent: [2, 4] # - this option sets a specific tab width for your code (off by default)
    key-spacing: 0 #[2, {"afterColon": true, "beforeColon": true, "align": "colon"}] # - enforces spacing between keys and values in object literal properties
    lines-around-comment: 0 # - 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: 2 # - require a capital letter for constructors
    new-parens: 0 # - disallow the omission of parentheses when invoking a constructor with no arguments
    newline-after-var: [1, "always"] # - 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: 1 # - 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, {"max": 2}]# - disallow multiple empty lines (off by default)
    no-nested-ternary: 1 # - disallow nested ternary expressions (off by default)
    no-new-object: 2 # - disallow use of the Object constructor
    no-spaced-func: 2 # - disallow space between function identifier and application
    no-ternary: 0 # - disallow the use of ternary operators (off by default)
    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 Boolean literals in conditional expressions (off by default)
    object-curly-spacing: 0 # - require or disallow padding inside curly braces (off by default)
    one-var: 2 # - allow or disallow one variable declaration per function (off by default)
    operator-assignment: 0 # - require assignment operator shorthand where possible or prohibit it entirely (off by default)
    operator-linebreak: [2, "after"] # - 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 backticks, double or single quotes should be used
    semi-spacing: [2, {"before": false, "after": true}] # - enforce spacing before and after semicolons
    semi: [2, "always"] # - 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: 2 # - require a space after certain keywords (off by default)
    space-before-blocks: [2, "always"] # - require or disallow space before blocks (off by default)
    space-before-function-paren: [2, "always"] # - require or disallow space before function opening parenthesis (off by default)
    space-in-parens: [2, "never"] # - require or disallow spaces inside parentheses (off by default)
    space-infix-ops: [2, {"int32Hint": true}] # - require spaces around operators
    space-return-throw-case: 2 # - require a space after return, throw, and case
    space-unary-ops: 2 # - Require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
    spaced-comment: 2 # - 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)