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.eslintrc
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.eslintrc
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parserOptions:
ecmaVersion: 6
env:
node: true # Node.js global variables and Node.js-specific rules
es6: true # Required for things like Promise constructors to be recognized
rules:
# Possible Errors
comma-dangle: ["error", "never"] # disallow trailing commas
no-cond-assign: ["error", "always"] # disallow assignment operators in conditional expressions
no-console: 0 # allow the use of console while we're developing. Turn this off later
no-constant-condition: "error" # disallow constant expressions in conditions
no-control-regex: "error" # disallow control characters in regular expressions
no-debugger: "error" # disallow the use of debugger
no-dupe-args: "error" # disallow duplicate arguments in function definitions
no-dupe-keys: "error" # disallow duplicate keys in object literals
no-duplicate-case: "error" # disallow duplicate case labels
no-empty: "error" # disallow empty block statements
no-empty-character-class: "error" # disallow empty character classes in regular expressions
no-ex-assign: "error" # disallow reassigning exceptions in catch clauses
no-extra-boolean-cast: "error" # disallow unnecessary boolean casts
no-extra-parens: 0 # disallow unnecessary parentheses
no-extra-semi: "error" # disallow unnecessary semicolons
no-func-assign: "error" # disallow reassigning function declarations
no-inner-declarations: "error" # disallow function or var declarations in nested blocks
no-invalid-regexp: "error" # disallow invalid regular expression strings in RegExp constructors
no-irregular-whitespace: "error" # disallow irregular whitespace outside of strings and comments
no-negated-in-lhs: "error" # disallow negating the left operand in in expressions
no-obj-calls: "error" # disallow calling global object properties as functions
no-regex-spaces: "error" # disallow multiple spaces in regular expression literals
no-sparse-arrays: "error" # disallow sparse arrays
no-unexpected-multiline: "error" # disallow confusing multiline expressions
no-unreachable: "error" # disallow unreachable code after return, throw, continue, and break statements
no-unsafe-finally: "error" # disallow control flow statements in finally blocks
use-isnan: "error" # require calls to isNaN() when checking for NaN
valid-jsdoc: 0 # enforce valid JSDoc comments
valid-typeof: "error" # enforce comparing typeof expressions against valid strings
# Best Practice
accessor-pairs: "error" # enforces getter/setter pairs in objects (off by default)
block-scoped-var: "error" # 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: ["error", "all"] # specify curly brace conventions for all control statements
default-case: "error" # require default case in switch statements (off by default)
dot-notation: "error" # encourages use of dot notation whenever possible
dot-location: ["error", "property"] # enforces consistent newlines before or after dots (off by default)
eqeqeq: "error" # require the use of === and !==
guard-for-in: "error" # make sure for-in loops have an if statement (off by default)
no-alert: "error" # disallow the use of alert, confirm, and prompt
no-caller: "error" # disallow use of arguments.caller or arguments.callee
no-confusing-arrow: "error" # disallow arrow functions where they could be confused with comparisons
no-div-regex: "error" # disallow division operators explicitly at beginning of regular expression (off by default)
no-else-return: "error" # disallow else after a return in an if (off by default)
no-eq-null: "error" # disallow comparisons to null without a type-checking operator (off by default)
no-eval: "error" # disallow use of eval()
no-extend-native: "error" # disallow adding to native types
no-extra-bind: "error" # disallow unnecessary function binding
no-fallthrough: "error" # disallow fallthrough of case statements
no-floating-decimal: "error" # disallow the use of leading or trailing decimal points in numeric literals (off by default)
no-implied-eval: "error" # disallow use of eval()-like methods
no-iterator: "error" # disallow usage of __iterator__ property
no-labels: "error" # disallow use of labeled statements
no-lone-blocks: "error" # disallow unnecessary nested blocks
no-loop-func: "error" # disallow creation of functions within loops
no-multi-spaces: "error" # disallow use of multiple spaces
no-multi-str: "error" # disallow use of multiline strings
no-native-reassign: "error" # disallow reassignments of native objects
no-new-func: "error" # disallow use of new operator for Function object
no-new-wrappers: "error" # disallows creating new instances of String, Number, and Boolean
no-new: "error" # disallow use of new operator when not part of the assignment or comparison
no-octal-escape: "error" # disallow use of octal escape sequences in string literals, such as var foo = "Copyright \251";
no-octal: "error" # 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: "error" # disallow usage of __proto__ property
no-redeclare: "error" # disallow declaring the same variable more then once
no-return-assign: "error" # disallow use of assignment in return statement
no-script-url: "error" # disallow use of javascript: urls
no-self-compare: "error" # disallow comparisons where both sides are exactly the same (off by default)
no-sequences: "error" # disallow use of comma operator
no-throw-literal: "error" # restrict what can be thrown as an exception (off by default)
no-unused-expressions: "error" # disallow usage of expressions in statement position
no-void: "error" # disallow use of void operator (off by default)
no-warning-comments: "warn" # disallow usage of configurable erroring terms in comments, e.g. TODO or FIXME (off by default)
no-with: "error" # disallow use of the with statement
radix: "error" # require use of the second argument for parseInt() (off by default)
vars-on-top: "error" # requires to declare all vars on top of their containing scope (off by default)
wrap-iife: "error" # require immediate function invocation to be wrapped in parentheses (off by default)
yoda: 0 # require or disallow Yoda conditions
# Strict Mode
strict: "error" # 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: "error" # 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: "error" # disallow shadowing of names such as arguments
no-undef: "error" # disallow use of undeclared variables unless mentioned in a /*global */ block
no-undef-init: "error" # disallow use of undefined when initializing variables
no-undefined: 0 # disallow use of undefined variable (off by default)
no-unused-vars: "error" # disallow declaration of variables that are not used in the code
no-use-before-define: ["error", "nofunc"] # disallow use of variables before they are defined
# Node.js
handle-callback-err: "warn" # enforces error handling in callbacks (off by default) (on by default in the node environment)
no-mixed-requires: "error" # disallow mixing regular variable and require declarations (off by default) (on by default in the node environment)
no-new-require: "error" # disallow use of new operator with the require function (off by default) (on by default in the node environment)
no-path-concat: "error" # 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: "warn" # disallow use of synchronous methods (off by default)
# Stylistic Issues
array-bracket-spacing: ["error", "never"] # enforce spacing inside array brackets (off by default)
brace-style: ["error", "1tbs"] # enforce one true brace style (off by default)
camelcase: "error" # require camel case names
comma-spacing: ["error", {before: false, after: true}] # enforce spacing before and after comma
comma-style: ["error", "last"] # enforce one true comma style (off by default)
computed-property-spacing: ["error", "never"] # require or disallow padding inside computed properties (off by default)
consistent-this: ["error", "that"] # enforces consistent naming when capturing the current execution context (off by default)
eol-last: "error" # 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: ["error", 4] # this option sets a specific tab width for your code (off by default)
key-spacing: ["error", {beforeColon: false, afterColon: true}] # enforces spacing between keys and values in object literal properties
lines-around-comment: 0 # enforces empty lines around comments (off by default)
linebreak-style: ["error", "unix"] # disallow mixed 'LF' and 'CRLF' as linebreaks (off by default)
max-nested-callbacks: ["error", 5] # require a capital letter for constructors
new-parens: "error" # allow/disallow an empty newline after var statement (off by default)
no-array-constructor: "error" # disallow use of the Array constructor
no-continue: "error" # disallow use of the continue statement (off by default)
no-inline-comments: 0 # disallow comments inline after code (off by default)
no-lonely-if: "error" # disallow if as the only statement in an else block (off by default)
no-mixed-spaces-and-tabs: "error" # disallow mixed spaces and tabs for indentation
no-multiple-empty-lines: 0 # disallow multiple empty lines (off by default)
no-nested-ternary: "error" # disallow nested ternary expressions (off by default)
no-new-object: 0 # disallow use of the Object constructor
no-spaced-func: "error" # disallow space between function identifier and application
no-ternary: 0 # disallow the use of ternary operators (off by default)
no-trailing-spaces: "error" # disallow trailing whitespace at the end of lines
no-underscore-dangle: 0 # allow dangling underscores, because of the streams API
one-var: 0 # allow just one var statement per function (off by default)
operator-assignment: ["error", "always"] # require assignment operator shorthand where possible or prohibit it entirely (off by default)
operator-linebreak: ["error", "before"] # 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: ["error", "double", {allowTemplateLiterals: true}] # specify whether double or single quotes should be used
semi-spacing: ["error", {before: false, after: true}] # enforce spacing before and after semicolons
semi: ["error", "always"] # require or disallow use of semicolons instead of ASI
sort-vars: 0 # sort variables within the same declaration block (off by default)
keyword-spacing: ["error", {before: true, after: true}] # require a space before or after certain keywords
space-before-blocks: ["error", "always"] # require or disallow space before blocks (off by default)
space-before-function-paren: ["error", {anonymous: always, named: never}] # require or disallow space before function opening parenthesis (off by default)
space-in-parens: ["error", "never"] # require or disallow spaces inside parentheses (off by default)
space-infix-ops: "error" # require spaces around operators
space-unary-ops: "error" # require or disallow spaces before/after unary operators (words on by default, nonwords off by default)
spaced-comment: ["error", "always"] # require or disallow a space immediately following the # or /* in a comment (off by default)
wrap-regex: "error" # require regex literals to be wrapped in parentheses (off by default)
# ECMAScript 6
constructor-super: "error" # 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: "error" # disallow to use this/super before super() calling in constructors (off by default)
no-var: "error" # 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: "error" # suggest using of const declaration for variables that are never modified after declared (off by default)
# Legacy
max-depth: ["error", 5] # specify the maximum depth that blocks can be nested (off by default)
max-len: ["error", 120] # specify the maximum length of a line in your program (off by default)
max-params: ["error", 4] # 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: "error" # disallow use of bitwise operators (off by default)
no-plusplus: "error" # disallow use of unary operators, ++ and -- (off by default)