oxc-project/oxc

Documented errors, page 4 of 12. Back to oxc-project/oxc

Code / Message	Type	Severity	Tags
The function is equivalent to	validation	error
This overload can be combined with another overload into…	validation	warning	oxlint, lint, typescript, overloads, optional-parameters, style
` ` can be escaped with	validation	error
An iframe element defines a sandbox attribute with invalid…	validation	error
Assign literal to a variable before exporting as module…	validation	warning	lint, oxlint, imports, default-export, literals, template-literal, style
Label in continue statement is not allowed	validation	warning	lint, javascript, labels, continue, control-flow, style
`VirtualFree` failed	panic	warning	vue, oxlint, lint, sfc, default-export, script
Bad array method on `arguments`.	validation	error	oxc, javascript, arguments, array-methods, runtime-error, oxlint
React Hook cannot be called inside a callback. React Hooks…	validation	error	react, hooks, rules-of-hooks, oxlint, lint, correctness
Unexpected surrogate pair in character class.	validation	warning	lint, regex, unicode, surrogate-pairs, emoji, javascript
Do not use `arguments.	validation	error	lint, deprecated-api, strict-mode, arguments-object, oxlint
` ` is forbidden after an `await` expression.	validation	warning	vue, async-await, script-setup, lint, expose
Unnecessary closing tag	validation	error
Unnecessary `.getTime()` call	validation	warning	oxlint, lint, unicorn, date, refactor
Expected to be before .	validation	warning	eslint, oxlint, style, accessor, getter, setter, object-literal
Global flag (g) is missing in the regular expression…	validation	error	oxlint, oxc, regexp, matchall, static-analysis, javascript
Interactive elements should not be assigned non-interactive…	validation	warning	jsx-a11y, react, accessibility, aria-roles, lint
Lacked a call of `super()` in some code paths.	validation	error	eslint, oxlint, class, super, constructor, control-flow
The attribute ` ` is not supported by the role ` `.	validation	warning	jsx-a11y, react, accessibility, aria, aria-roles, lint
This function does not use any variables from its parent…	validation	warning	oxlint, lint, unicorn, scoping, functions, performance
' ' was used before it was defined.	validation	warning	eslint, oxlint, hoisting, tdz, declaration-order
Prefer negative index over `.length - index` when possible.	validation	error
`tabIndex` should only be declared on interactive elements.	validation	warning	jsx-a11y, react, accessibility, tabindex, keyboard-navigation, lint
Fast refresh only works when a file only exports…	validation	error
invalid fix capabilities	panic	error	vue, oxlint, lint, emits, validator, falsy-return
Do not access a member directly from an await expression.	validation	warning	async-await, style, readability, oxlint
Missing name in `@property` tag.	validation	error
Prefer class field declaration over `this` assignment in…	validation	warning	oxlint, unicorn, classes, modernization, refactor
Unexpected `await` inside a loop.	validation	warning	lint, async, performance, promise, oxlint
`defineOptions` has been called multiple times.	validation	error	vue, script-setup, compiler-macro, defineoptions, lint, duplicate-call
Inline helpers are not supported yet	panic	error	vue, oxlint, lint, script-setup, defineemits, compiler-macro
Unexpected return statement in constructor.	validation	error	lint, constructor, class, return-value, oxlint
Expect must have a corresponding matcher call.	validation	error	jest, vitest, oxlint, expect, assertion, vacuous-test
Invalid regular expression: Duplicated flag	validation	error	regex, lint, javascript, syntax-error, flags
Prefer consistent types when spreading a ternary in an…	validation	warning	oxlint, lint, unicorn, arrays, spread, types
React Hook contains a call to setState. Without a list of…	validation	error
all spread attributes are treated as if they contain an…	validation	warning	react, security, spread-props, tabnabbing, oxlint, lint
Unexpected sync method	validation	warning	node, async, performance, event-loop, oxlint
Using string literals in ref attributes is deprecated.	validation	error
An `iframe` element defines a sandbox attribute with both…	validation	error
Missing throw	validation	error	oxlint, oxc, error-handling, logic-bug, javascript, static-analysis
Second argument must be a function	validation	error	jest, vitest, oxlint, describe, validation
This rule can't verify that `export *` only exports…	validation	error
Do not spread accumulators in loops	validation	warning	oxlint, performance, loop, object-spread, quadratic-complexity
Useless case in switch statement.	validation	warning	lint, oxlint, unicorn, switch, fall-through, dead-code, pedantic
Prefer ternary expressions over simple `if-else` statements.	validation	warning	oxlint, unicorn, style, ternary, conditional
The ` ` lifecycle hook is deprecated. Use ` ` instead.	validation	error	vue, oxlint, lint, lifecycle, vue3, migration, deprecated, memory-leak
Use ` ` instead.	validation	warning	jest, vitest, test-focus, style, oxlint, lint
Import the following Jest functions from `@jest/globals	validation	warning	lint, jest, testing, imports, globals, autofix, oxlint
Magic number for `Array.prototype.flat` depth is not…	validation	warning	arrays, magic-numbers, readability, oxlint
Missing return type on function.	validation	warning	typescript, lint, annotations, return-type, oxlint
Prefer ` `.	validation	error
The ` ` element has an implicit role of ` `. Defining this…	validation	warning	jsx-a11y, react, accessibility, aria-roles, lint
Disallowed usage of `process.env`.	validation	warning	node, configuration, environment-variables, restriction, oxlint
Mocks should not be manually imported from a `__mocks__`…	validation	warning	jest, vitest, oxlint, testing, mocks, imports
Unexpected use of `new` operator with `require`	validation	warning	node, commonjs, require, constructor, oxlint
Avoid using a negative index with `Array#with()`.	validation	warning	arrays, es2023, suspicious-code, oxlint
Disallow using `Object.assign` with an object literal as…	validation	warning	oxlint, eslint, es2018, objects, spread, modernization
Do not construct dirname.	validation	error
Empty array binding pattern	validation	warning	eslint, destructuring, oxlint, lint, correctness
Enforces a maximum depth to nested describe calls.	validation	warning	jest, vitest, oxlint, testing, nesting, describe
Every test should have either	validation	warning	lint, jest, testing, assertions, autofix, oxlint
Missing "key" prop for element in array.	validation	error	react, jsx, list-key, reconciliation, oxlint, lint
No duplicate polyfills from Polyfill.io are allowed.	validation	warning	nextjs, polyfill, security, performance, lint
Use of ` ` is disallowed	validation	warning	jest, vitest, oxlint, testing, matchers, config, restricted-api
Encountered same-named class field declaration and `this`…	validation	warning	oxlint, unicorn, classes, dead-code, refactor
Standard form for React fragments is preferred.	validation	error
Test must end with an assertion	validation	warning	lint, jest, testing, assertions, oxlint
Unexpected access to `module.exports`.	validation	info	node, commonjs, exports, style, oxlint
Usage of namespaced aka wildcard \"*\" imports prohibited	console	warning	lint, oxlint, imports, namespace-import, tree-shaking, style
Using a spread operator here creates a new array…	validation	warning	lint, oxlint, unicorn, spread, function-calls, arguments, correctness
an empty interface is equivalent to	validation	warning	typescript, lint, interface, type-safety, oxlint
Do not use string interpolation inside of snapshots	validation	warning	jest, vitest, oxlint, testing, snapshots, interpolation, template-literal
Unexpected Unicode BOM (Byte Order Mark)	validation	warning	eslint, oxlint, unicode, bom, encoding, lint
Use uppercase characters for the value of the escape…	validation	warning	oxlint, lint, unicorn, strings, regex, style
Unexpected multiple arguments.	validation	warning	vue, slots, lint, render-function
Unexpected var, use let or const instead.	validation	warning	lint, eslint, oxlint, variables, scoping, javascript
Ambiguous text within anchor, screen reader users rely on…	validation	warning	jsx-a11y, accessibility, link-text, screen-reader, react, lint, oxlint
`jest.mock()` factories should not be used without an…	console	warning	lint, jest, typescript, mocking, testing, oxlint
Use an `import` instead of an `import type`.	validation	warning	typescript, lint, imports, type-import, oxlint
All `if` blocks contain the same code at the end	validation	warning	oxlint, oxc, code-duplication, pedantic, javascript, static-analysis
Do not use `new` on `Promise.	validation	error	promise, async, lint, runtime-error, oxlint
Error message should be a string.	validation	warning	oxlint, lint, unicorn, errors, types
Passing a fragment to a HTML element is useless.	validation	warning	react, jsx, fragment, html-element, autofix, oxlint, lint
React does not recognize data-* props with uppercase…	validation	error
Unexpected spread argument.	validation	warning	vue, slots, lint, spread, render-function
Backreference ' ' will be ignored. It references group ' '…	validation	warning	lint, eslint, oxlint, regex, lookbehind
ES2015 module syntax is preferred over namespaces.	validation	warning	typescript, namespace, modules, modernization, oxlint, lint
Object keys should be sorted	validation	info	eslint, oxlint, sorting, objects, style, lint
Redundant double negation	validation	warning	javascript, eslint, lint, boolean, autofix
The attribute ` ` is not supported by the role ` `. This…	validation	warning	jsx-a11y, react, accessibility, aria, aria-roles, lint
Use the rest parameters instead of `arguments`.	validation	warning	eslint, oxlint, es6, modernization, lint
Backreference ' ' will be ignored. It references group ' '…	validation	warning	lint, eslint, oxlint, regex, negative-lookahead
No spaces inside empty pair of braces allowed	validation	warning	oxlint, lint, unicorn, formatting, whitespace, style
Suggest using `toBeCalledWith()` or…	validation	warning	jest, vitest, oxlint, testing, mocks, assertions, static-analysis
This overload can be combined with another overload into…	validation	warning	oxlint, lint, typescript, overloads, rest-parameter, style
Unexpected declaration in the global scope.	validation	warning	oxlint, lint, globals, scope, scripts
Function name ` ` should match property name ` `.	validation	warning	eslint, oxlint, naming, function-expression
Prefer `String#replaceAll()` over `String#replace()` when…	validation	warning	oxlint, unicorn, string, regex, es2021
Confusing combinations of non-null assertion and assignment…	validation	warning	typescript, lint, non-null-assertion, assignment, oxlint