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rules.yml
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rules.yml
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deprecated:
description: >-
These rules have been deprecated in accordance with the <a
href="/docs/user-guide/rule-deprecation">deprecation policy</a>, and
replaced by newer rules:
name: Deprecated
rules:
- name: callback-return
replacedBy: []
- name: global-require
replacedBy: []
- name: handle-callback-err
replacedBy: []
- name: id-blacklist
replacedBy:
- id-denylist
- name: indent-legacy
replacedBy:
- indent
- name: lines-around-directive
replacedBy:
- padding-line-between-statements
- name: newline-after-var
replacedBy:
- padding-line-between-statements
- name: newline-before-return
replacedBy:
- padding-line-between-statements
- name: no-buffer-constructor
replacedBy: []
- name: no-catch-shadow
replacedBy:
- no-shadow
- name: no-mixed-requires
replacedBy: []
- name: no-native-reassign
replacedBy:
- no-global-assign
- name: no-negated-in-lhs
replacedBy:
- no-unsafe-negation
- name: no-new-require
replacedBy: []
- name: no-path-concat
replacedBy: []
- name: no-process-env
replacedBy: []
- name: no-process-exit
replacedBy: []
- name: no-restricted-modules
replacedBy: []
- name: no-spaced-func
replacedBy:
- func-call-spacing
- name: no-sync
replacedBy: []
- name: prefer-reflect
replacedBy: []
- name: require-jsdoc
replacedBy: []
- name: valid-jsdoc
replacedBy: []
removed:
description: >-
These rules from older versions of ESLint (before the <a
href="/docs/user-guide/rule-deprecation">deprecation policy</a> existed)
have been replaced by newer rules:
name: Removed
rules:
- removed: generator-star
replacedBy:
- generator-star-spacing
- removed: global-strict
replacedBy:
- strict
- removed: no-arrow-condition
replacedBy:
- no-confusing-arrow
- no-constant-condition
- removed: no-comma-dangle
replacedBy:
- comma-dangle
- removed: no-empty-class
replacedBy:
- no-empty-character-class
- removed: no-empty-label
replacedBy:
- no-labels
- removed: no-extra-strict
replacedBy:
- strict
- removed: no-reserved-keys
replacedBy:
- quote-props
- removed: no-space-before-semi
replacedBy:
- semi-spacing
- removed: no-wrap-func
replacedBy:
- no-extra-parens
- removed: space-after-function-name
replacedBy:
- space-before-function-paren
- removed: space-after-keywords
replacedBy:
- keyword-spacing
- removed: space-before-function-parentheses
replacedBy:
- space-before-function-paren
- removed: space-before-keywords
replacedBy:
- keyword-spacing
- removed: space-in-brackets
replacedBy:
- object-curly-spacing
- array-bracket-spacing
- removed: space-return-throw-case
replacedBy:
- keyword-spacing
- removed: space-unary-word-ops
replacedBy:
- space-unary-ops
- removed: spaced-line-comment
replacedBy:
- spaced-comment
ruleTypes:
- &ref_0
description: 'These rules relate to possible logic errors in code:'
displayName: Possible Problems
name: problem
rules:
- description: enforce `return` statements in callbacks of array methods
fixable: false
name: array-callback-return
recommended: false
- description: require `super()` calls in constructors
fixable: false
name: constructor-super
recommended: true
- description: >-
enforce "for" loop update clause moving the counter in the right
direction.
fixable: false
name: for-direction
recommended: true
- description: enforce `return` statements in getters
fixable: false
name: getter-return
recommended: true
- description: disallow using an async function as a Promise executor
fixable: false
name: no-async-promise-executor
recommended: true
- description: disallow `await` inside of loops
fixable: false
name: no-await-in-loop
recommended: false
- description: disallow reassigning class members
fixable: false
name: no-class-assign
recommended: true
- description: disallow comparing against -0
fixable: false
name: no-compare-neg-zero
recommended: true
- description: disallow assignment operators in conditional expressions
fixable: false
name: no-cond-assign
recommended: true
- description: disallow reassigning `const` variables
fixable: false
name: no-const-assign
recommended: true
- description: disallow constant expressions in conditions
fixable: false
name: no-constant-condition
recommended: true
- description: disallow returning value from constructor
fixable: false
name: no-constructor-return
recommended: false
- description: disallow control characters in regular expressions
fixable: false
name: no-control-regex
recommended: true
- description: disallow the use of `debugger`
fixable: false
name: no-debugger
recommended: true
- description: disallow duplicate arguments in `function` definitions
fixable: false
name: no-dupe-args
recommended: true
- description: disallow duplicate class members
fixable: false
name: no-dupe-class-members
recommended: true
- description: disallow duplicate conditions in if-else-if chains
fixable: false
name: no-dupe-else-if
recommended: true
- description: disallow duplicate keys in object literals
fixable: false
name: no-dupe-keys
recommended: true
- description: disallow duplicate case labels
fixable: false
name: no-duplicate-case
recommended: true
- description: disallow duplicate module imports
fixable: false
name: no-duplicate-imports
recommended: false
- description: disallow empty character classes in regular expressions
fixable: false
name: no-empty-character-class
recommended: true
- description: disallow empty destructuring patterns
fixable: false
name: no-empty-pattern
recommended: true
- description: disallow reassigning exceptions in `catch` clauses
fixable: false
name: no-ex-assign
recommended: true
- description: disallow fallthrough of `case` statements
fixable: false
name: no-fallthrough
recommended: true
- description: disallow reassigning `function` declarations
fixable: false
name: no-func-assign
recommended: true
- description: disallow assigning to imported bindings
fixable: false
name: no-import-assign
recommended: true
- description: disallow variable or `function` declarations in nested blocks
fixable: false
name: no-inner-declarations
recommended: true
- description: disallow invalid regular expression strings in `RegExp` constructors
fixable: false
name: no-invalid-regexp
recommended: true
- description: disallow irregular whitespace
fixable: false
name: no-irregular-whitespace
recommended: true
- description: disallow literal numbers that lose precision
fixable: false
name: no-loss-of-precision
recommended: false
- description: >-
disallow characters which are made with multiple code points in
character class syntax
fixable: false
name: no-misleading-character-class
recommended: true
- description: disallow `new` operators with the `Symbol` object
fixable: false
name: no-new-symbol
recommended: true
- description: disallow calling global object properties as functions
fixable: false
name: no-obj-calls
recommended: true
- description: disallow returning values from Promise executor functions
fixable: false
name: no-promise-executor-return
recommended: false
- description: disallow calling some `Object.prototype` methods directly on objects
fixable: false
name: no-prototype-builtins
recommended: true
- description: disallow assignments where both sides are exactly the same
fixable: false
name: no-self-assign
recommended: true
- description: disallow comparisons where both sides are exactly the same
fixable: false
name: no-self-compare
recommended: false
- description: disallow returning values from setters
fixable: false
name: no-setter-return
recommended: true
- description: disallow sparse arrays
fixable: false
name: no-sparse-arrays
recommended: true
- description: disallow template literal placeholder syntax in regular strings
fixable: false
name: no-template-curly-in-string
recommended: false
- description: disallow `this`/`super` before calling `super()` in constructors
fixable: false
name: no-this-before-super
recommended: true
- description: >-
disallow the use of undeclared variables unless mentioned in `/*global
*/` comments
fixable: false
name: no-undef
recommended: true
- description: disallow confusing multiline expressions
fixable: false
name: no-unexpected-multiline
recommended: true
- description: disallow unmodified loop conditions
fixable: false
name: no-unmodified-loop-condition
recommended: false
- description: >-
disallow unreachable code after `return`, `throw`, `continue`, and
`break` statements
fixable: false
name: no-unreachable
recommended: true
- description: disallow loops with a body that allows only one iteration
fixable: false
name: no-unreachable-loop
recommended: false
- description: disallow control flow statements in `finally` blocks
fixable: false
name: no-unsafe-finally
recommended: true
- description: disallow negating the left operand of relational operators
fixable: false
name: no-unsafe-negation
recommended: true
- description: >-
disallow use of optional chaining in contexts where the `undefined`
value is not allowed
fixable: false
name: no-unsafe-optional-chaining
recommended: false
- description: disallow unused variables
fixable: false
name: no-unused-vars
recommended: true
- description: disallow the use of variables before they are defined
fixable: false
name: no-use-before-define
recommended: false
- description: disallow useless backreferences in regular expressions
fixable: false
name: no-useless-backreference
recommended: false
- description: >-
disallow assignments that can lead to race conditions due to usage of
`await` or `yield`
fixable: false
name: require-atomic-updates
recommended: false
- description: require calls to `isNaN()` when checking for `NaN`
fixable: false
name: use-isnan
recommended: true
- description: enforce comparing `typeof` expressions against valid strings
fixable: false
name: valid-typeof
recommended: true
- &ref_1
description: 'These rules suggest alternate ways of doing things:'
displayName: Suggestions
name: suggestion
rules:
- description: enforce getter and setter pairs in objects and classes
fixable: false
name: accessor-pairs
recommended: false
- description: require braces around arrow function bodies
fixable: true
name: arrow-body-style
recommended: false
- description: enforce the use of variables within the scope they are defined
fixable: false
name: block-scoped-var
recommended: false
- description: enforce camelcase naming convention
fixable: false
name: camelcase
recommended: false
- description: enforce or disallow capitalization of the first letter of a comment
fixable: true
name: capitalized-comments
recommended: false
- description: enforce that class methods utilize `this`
fixable: false
name: class-methods-use-this
recommended: false
- description: enforce a maximum cyclomatic complexity allowed in a program
fixable: false
name: complexity
recommended: false
- description: require `return` statements to either always or never specify values
fixable: false
name: consistent-return
recommended: false
- description: enforce consistent naming when capturing the current execution context
fixable: false
name: consistent-this
recommended: false
- description: enforce consistent brace style for all control statements
fixable: true
name: curly
recommended: false
- description: require `default` cases in `switch` statements
fixable: false
name: default-case
recommended: false
- description: enforce default clauses in switch statements to be last
fixable: false
name: default-case-last
recommended: false
- description: enforce default parameters to be last
fixable: false
name: default-param-last
recommended: false
- description: enforce dot notation whenever possible
fixable: true
name: dot-notation
recommended: false
- description: require the use of `===` and `!==`
fixable: true
name: eqeqeq
recommended: false
- description: >-
require function names to match the name of the variable or property
to which they are assigned
fixable: false
name: func-name-matching
recommended: false
- description: require or disallow named `function` expressions
fixable: false
name: func-names
recommended: false
- description: >-
enforce the consistent use of either `function` declarations or
expressions
fixable: false
name: func-style
recommended: false
- description: require grouped accessor pairs in object literals and classes
fixable: false
name: grouped-accessor-pairs
recommended: false
- description: require `for-in` loops to include an `if` statement
fixable: false
name: guard-for-in
recommended: false
- description: disallow specified identifiers
fixable: false
name: id-denylist
recommended: false
- description: enforce minimum and maximum identifier lengths
fixable: false
name: id-length
recommended: false
- description: require identifiers to match a specified regular expression
fixable: false
name: id-match
recommended: false
- description: require or disallow initialization in variable declarations
fixable: false
name: init-declarations
recommended: false
- description: enforce a maximum number of classes per file
fixable: false
name: max-classes-per-file
recommended: false
- description: enforce a maximum depth that blocks can be nested
fixable: false
name: max-depth
recommended: false
- description: enforce a maximum number of lines per file
fixable: false
name: max-lines
recommended: false
- description: enforce a maximum number of lines of code in a function
fixable: false
name: max-lines-per-function
recommended: false
- description: enforce a maximum depth that callbacks can be nested
fixable: false
name: max-nested-callbacks
recommended: false
- description: enforce a maximum number of parameters in function definitions
fixable: false
name: max-params
recommended: false
- description: enforce a maximum number of statements allowed in function blocks
fixable: false
name: max-statements
recommended: false
- description: enforce a particular style for multiline comments
fixable: true
name: multiline-comment-style
recommended: false
- description: require constructor names to begin with a capital letter
fixable: false
name: new-cap
recommended: false
- description: 'disallow the use of `alert`, `confirm`, and `prompt`'
fixable: false
name: no-alert
recommended: false
- description: disallow `Array` constructors
fixable: false
name: no-array-constructor
recommended: false
- description: disallow bitwise operators
fixable: false
name: no-bitwise
recommended: false
- description: disallow the use of `arguments.caller` or `arguments.callee`
fixable: false
name: no-caller
recommended: false
- description: disallow lexical declarations in case clauses
fixable: false
name: no-case-declarations
recommended: true
- description: disallow arrow functions where they could be confused with comparisons
fixable: true
name: no-confusing-arrow
recommended: false
- description: disallow the use of `console`
fixable: false
name: no-console
recommended: false
- description: disallow `continue` statements
fixable: false
name: no-continue
recommended: false
- description: disallow deleting variables
fixable: false
name: no-delete-var
recommended: true
- description: >-
disallow division operators explicitly at the beginning of regular
expressions
fixable: true
name: no-div-regex
recommended: false
- description: disallow `else` blocks after `return` statements in `if` statements
fixable: true
name: no-else-return
recommended: false
- description: disallow empty block statements
fixable: false
name: no-empty
recommended: true
- description: disallow empty functions
fixable: false
name: no-empty-function
recommended: false
- description: disallow `null` comparisons without type-checking operators
fixable: false
name: no-eq-null
recommended: false
- description: disallow the use of `eval()`
fixable: false
name: no-eval
recommended: false
- description: disallow extending native types
fixable: false
name: no-extend-native
recommended: false
- description: disallow unnecessary calls to `.bind()`
fixable: true
name: no-extra-bind
recommended: false
- description: disallow unnecessary boolean casts
fixable: true
name: no-extra-boolean-cast
recommended: true
- description: disallow unnecessary labels
fixable: true
name: no-extra-label
recommended: false
- description: disallow unnecessary semicolons
fixable: true
name: no-extra-semi
recommended: true
- description: disallow leading or trailing decimal points in numeric literals
fixable: true
name: no-floating-decimal
recommended: false
- description: disallow assignments to native objects or read-only global variables
fixable: false
name: no-global-assign
recommended: true
- description: disallow shorthand type conversions
fixable: true
name: no-implicit-coercion
recommended: false
- description: disallow declarations in the global scope
fixable: false
name: no-implicit-globals
recommended: false
- description: disallow the use of `eval()`-like methods
fixable: false
name: no-implied-eval
recommended: false
- description: disallow inline comments after code
fixable: false
name: no-inline-comments
recommended: false
- description: disallow `this` keywords outside of classes or class-like objects
fixable: false
name: no-invalid-this
recommended: false
- description: disallow the use of the `__iterator__` property
fixable: false
name: no-iterator
recommended: false
- description: disallow labels that share a name with a variable
fixable: false
name: no-label-var
recommended: false
- description: disallow labeled statements
fixable: false
name: no-labels
recommended: false
- description: disallow unnecessary nested blocks
fixable: false
name: no-lone-blocks
recommended: false
- description: disallow `if` statements as the only statement in `else` blocks
fixable: true
name: no-lonely-if
recommended: false
- description: >-
disallow function declarations that contain unsafe references inside
loop statements
fixable: false
name: no-loop-func
recommended: false
- description: disallow magic numbers
fixable: false
name: no-magic-numbers
recommended: false
- description: disallow mixed binary operators
fixable: false
name: no-mixed-operators
recommended: false
- description: disallow use of chained assignment expressions
fixable: false
name: no-multi-assign
recommended: false
- description: disallow multiline strings
fixable: false
name: no-multi-str
recommended: false
- description: disallow negated conditions
fixable: false
name: no-negated-condition
recommended: false
- description: disallow nested ternary expressions
fixable: false
name: no-nested-ternary
recommended: false
- description: disallow `new` operators outside of assignments or comparisons
fixable: false
name: no-new
recommended: false
- description: disallow `new` operators with the `Function` object
fixable: false
name: no-new-func
recommended: false
- description: disallow `Object` constructors
fixable: false
name: no-new-object
recommended: false
- description: >-
disallow `new` operators with the `String`, `Number`, and `Boolean`
objects
fixable: false
name: no-new-wrappers
recommended: false
- description: disallow `\8` and `\9` escape sequences in string literals
fixable: false
name: no-nonoctal-decimal-escape
recommended: false
- description: disallow octal literals
fixable: false
name: no-octal
recommended: true
- description: disallow octal escape sequences in string literals
fixable: false
name: no-octal-escape
recommended: false
- description: disallow reassigning `function` parameters
fixable: false
name: no-param-reassign
recommended: false
- description: disallow the unary operators `++` and `--`
fixable: false
name: no-plusplus
recommended: false
- description: disallow the use of the `__proto__` property
fixable: false
name: no-proto
recommended: false
- description: disallow variable redeclaration
fixable: false
name: no-redeclare
recommended: true
- description: disallow multiple spaces in regular expressions
fixable: true
name: no-regex-spaces
recommended: true
- description: disallow specified names in exports
fixable: false
name: no-restricted-exports
recommended: false
- description: disallow specified global variables
fixable: false
name: no-restricted-globals
recommended: false
- description: disallow specified modules when loaded by `import`
fixable: false
name: no-restricted-imports
recommended: false
- description: disallow certain properties on certain objects
fixable: false
name: no-restricted-properties
recommended: false
- description: disallow specified syntax
fixable: false
name: no-restricted-syntax
recommended: false
- description: disallow assignment operators in `return` statements
fixable: false
name: no-return-assign
recommended: false
- description: disallow unnecessary `return await`
fixable: false
name: no-return-await
recommended: false
- description: 'disallow `javascript:` urls'
fixable: false
name: no-script-url
recommended: false
- description: disallow comma operators
fixable: false
name: no-sequences
recommended: false
- description: >-
disallow variable declarations from shadowing variables declared in
the outer scope
fixable: false
name: no-shadow
recommended: false
- description: disallow identifiers from shadowing restricted names
fixable: false
name: no-shadow-restricted-names
recommended: true
- description: disallow ternary operators
fixable: false
name: no-ternary
recommended: false
- description: disallow throwing literals as exceptions
fixable: false
name: no-throw-literal
recommended: false
- description: disallow initializing variables to `undefined`
fixable: true
name: no-undef-init
recommended: false
- description: disallow the use of `undefined` as an identifier
fixable: false
name: no-undefined
recommended: false
- description: disallow dangling underscores in identifiers
fixable: false
name: no-underscore-dangle
recommended: false
- description: disallow ternary operators when simpler alternatives exist
fixable: true
name: no-unneeded-ternary
recommended: false
- description: disallow unused expressions
fixable: false
name: no-unused-expressions
recommended: false
- description: disallow unused labels
fixable: true
name: no-unused-labels
recommended: true
- description: disallow unnecessary calls to `.call()` and `.apply()`
fixable: false
name: no-useless-call
recommended: false
- description: disallow unnecessary `catch` clauses
fixable: false
name: no-useless-catch
recommended: true
- description: disallow unnecessary computed property keys in objects and classes
fixable: true
name: no-useless-computed-key
recommended: false
- description: disallow unnecessary concatenation of literals or template literals
fixable: false
name: no-useless-concat
recommended: false
- description: disallow unnecessary constructors
fixable: false
name: no-useless-constructor
recommended: false
- description: disallow unnecessary escape characters
fixable: false
name: no-useless-escape
recommended: true
- description: >-
disallow renaming import, export, and destructured assignments to the
same name
fixable: true
name: no-useless-rename
recommended: false
- description: disallow redundant return statements
fixable: true
name: no-useless-return
recommended: false
- description: require `let` or `const` instead of `var`
fixable: true
name: no-var
recommended: false
- description: disallow `void` operators
fixable: false
name: no-void
recommended: false
- description: disallow specified warning terms in comments
fixable: false
name: no-warning-comments
recommended: false
- description: disallow `with` statements
fixable: false
name: no-with
recommended: true
- description: >-
require or disallow method and property shorthand syntax for object
literals
fixable: true
name: object-shorthand
recommended: false
- description: >-
enforce variables to be declared either together or separately in
functions
fixable: true
name: one-var
recommended: false
- description: require or disallow newlines around variable declarations
fixable: true
name: one-var-declaration-per-line
recommended: false
- description: require or disallow assignment operator shorthand where possible
fixable: true
name: operator-assignment
recommended: false
- description: require using arrow functions for callbacks
fixable: true
name: prefer-arrow-callback
recommended: false
- description: >-
require `const` declarations for variables that are never reassigned
after declared
fixable: true
name: prefer-const
recommended: false
- description: require destructuring from arrays and/or objects
fixable: true
name: prefer-destructuring
recommended: false
- description: disallow the use of `Math.pow` in favor of the `**` operator
fixable: true
name: prefer-exponentiation-operator
recommended: false
- description: enforce using named capture group in regular expression
fixable: false
name: prefer-named-capture-group
recommended: false
- description: >-
disallow `parseInt()` and `Number.parseInt()` in favor of binary,
octal, and hexadecimal literals
fixable: true
name: prefer-numeric-literals
recommended: false
- description: >-
disallow using Object.assign with an object literal as the first
argument and prefer the use of object spread instead.
fixable: true
name: prefer-object-spread
recommended: false
- description: require using Error objects as Promise rejection reasons
fixable: false
name: prefer-promise-reject-errors
recommended: false
- description: >-
disallow use of the `RegExp` constructor in favor of regular
expression literals
fixable: false
name: prefer-regex-literals
recommended: false
- description: require rest parameters instead of `arguments`
fixable: false
name: prefer-rest-params
recommended: false
- description: require spread operators instead of `.apply()`
fixable: false
name: prefer-spread
recommended: false
- description: require template literals instead of string concatenation
fixable: true
name: prefer-template
recommended: false
- description: require quotes around object literal property names
fixable: true
name: quote-props
recommended: false
- description: >-
enforce the consistent use of the radix argument when using
`parseInt()`
fixable: false
name: radix
recommended: false
- description: disallow async functions which have no `await` expression
fixable: false
name: require-await
recommended: false
- description: enforce the use of `u` flag on RegExp
fixable: false
name: require-unicode-regexp
recommended: false
- description: require generator functions to contain `yield`
fixable: false
name: require-yield
recommended: true
- description: enforce sorted import declarations within modules
fixable: true
name: sort-imports
recommended: false
- description: require object keys to be sorted
fixable: false
name: sort-keys
recommended: false
- description: require variables within the same declaration block to be sorted
fixable: true
name: sort-vars
recommended: false
- description: enforce consistent spacing after the `//` or `/*` in a comment
fixable: true
name: spaced-comment
recommended: false
- description: require or disallow strict mode directives
fixable: true
name: strict
recommended: false
- description: require symbol descriptions
fixable: false
name: symbol-description
recommended: false
- description: >-
require `var` declarations be placed at the top of their containing
scope
fixable: false
name: vars-on-top
recommended: false
- description: require or disallow "Yoda" conditions
fixable: true
name: yoda
recommended: false
- &ref_2
description: 'These rules care about how the code looks rather than how it executes:'
displayName: Layout & Formatting
name: layout
rules:
- description: enforce linebreaks after opening and before closing array brackets
fixable: true
name: array-bracket-newline
recommended: false
- description: enforce consistent spacing inside array brackets
fixable: true
name: array-bracket-spacing
recommended: false
- description: enforce line breaks after each array element
fixable: true
name: array-element-newline
recommended: false
- description: require parentheses around arrow function arguments
fixable: true
name: arrow-parens
recommended: false
- description: >-
enforce consistent spacing before and after the arrow in arrow
functions
fixable: true
name: arrow-spacing