Unicorn

223 rules eslint-plugin-unicorn@76.0.0

Complete effective rule inventory.

Docs

unicorn/class-reference-in-static-methods
Enforce consistent class references in static methods.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/consistent-assert
Enforce consistent assertion style with node:assert.

: error in All Unicorn contexts

Autofix available
unicorn/consistent-date-clone
Prefer passing Date directly to the constructor when cloning.

: error in All Unicorn contexts

Autofix available
unicorn/consistent-empty-array-spread
Prefer consistent types when spreading a ternary in an array literal.

: error in All Unicorn contexts

Autofix available
unicorn/consistent-function-scoping
Move function definitions to the highest possible scope.

: error in TypeScript source, React source, JavaScript source, React JavaScript source, Syntax-only tool configuration, Design-system React source

No autofix
unicorn/consistent-json-file-read
Enforce consistent JSON file reads before JSON.parse().

: error in All Unicorn contexts

Autofix available
unicorn/custom-error-definition
Enforce correct Error subclassing.

: warning in All Unicorn contexts

Autofix available
unicorn/error-message
Enforce passing a message value when creating a built-in error.

: error in All Unicorn contexts

No autofix
unicorn/explicit-timer-delay
Enforce or disallow explicit delay argument for setTimeout() and setInterval().

: error in All Unicorn contexts

Autofix available
unicorn/filename-case
Enforce a case style for filenames and directory names.

: error in All Unicorn contexts

No autofix
unicorn/iteration-fallback-style
Enforce a consistent style for optional loop sources.

: warning in All Unicorn contexts

Autofix available
unicorn/logical-assignment-operators
Require or disallow logical assignment operator shorthand

: warning in All Unicorn contexts

Autofix available; suggestions available
unicorn/new-for-builtins
Enforce correct use of new for builtin constructors.

: error in All Unicorn contexts

Autofix available; suggestions available
unicorn/no-accessor-recursion
Disallow recursive access to this within getters and setters.

: error in All Unicorn contexts

No autofix
unicorn/no-accidental-bitwise-operator
Disallow bitwise operators where a logical operator was likely intended.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-array-concat-in-loop
Disallow array accumulation with Array#concat() in loops.

: error in All Unicorn contexts

No autofix
unicorn/no-array-fill-with-reference-type
Disallow using reference values as Array#fill() values.

: error in All Unicorn contexts

No autofix
unicorn/no-array-from-fill
Disallow .fill() after Array.from({length: …}).

: error in All Unicorn contexts

No autofix
unicorn/no-array-method-this-argument
Disallow using the this argument in array methods.

: error in All Unicorn contexts

Autofix available; suggestions available
unicorn/no-array-reverse
Prefer Array#toReversed() over Array#reverse().

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-array-sort
Prefer Array#toSorted() over Array#sort().

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-array-sort-for-min-max
Disallow sorting arrays to get the minimum or maximum value.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-async-iterator-callback
Disallow asynchronous callbacks in synchronous iterator helpers.

: error in All Unicorn contexts

No autofix
unicorn/no-async-promise-finally
Disallow async functions as Promise#finally() callbacks.

: error in All Unicorn contexts

No autofix
unicorn/no-await-expression-member
Disallow member access from await expression.

: error in All Unicorn contexts

Autofix available
unicorn/no-await-in-promise-methods
Disallow using await in Promise method parameters.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-blob-to-file
Disallow unnecessary Blob to File conversion.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-boolean-sort-comparator
Disallow boolean-returning sort comparators.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-canvas-to-image
Prefer drawing canvases directly instead of converting them to images.

: error in All Unicorn contexts

No autofix
unicorn/no-chained-comparison
Disallow chained comparisons such as a < b < c.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-collection-bracket-access
Disallow accessing Map, Set, WeakMap, and WeakSet entries with bracket notation.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-computed-property-existence-check
Disallow dynamic object property existence checks.

: warning in All Unicorn contexts

No autofix; suggestions available
unicorn/no-confusing-array-splice
Disallow confusing uses of Array#{splice,toSpliced}().

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-confusing-array-with
Disallow confusing uses of Array#with().

: error in All Unicorn contexts

No autofix
unicorn/no-constant-zero-expression
Disallow arithmetic and bitwise operations that always evaluate to 0.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-document-cookie
Do not use document.cookie directly.

: error in All Unicorn contexts

No autofix
unicorn/no-double-comparison
Disallow two comparisons of the same operands that can be combined into one.

: error in All Unicorn contexts

No autofix; suggestions available
unicorn/no-duplicate-if-branches
Disallow duplicate adjacent branches in if chains.

: error in All Unicorn contexts

No autofix
unicorn/no-duplicate-logical-operands
Disallow adjacent duplicate operands in logical expressions.

: error in All Unicorn contexts

Autofix available; suggestions available
unicorn/no-duplicate-loops
Disallow .map() and .filter() in for…of and for await…of loop headers.

: error in All Unicorn contexts

No autofix

Rules