3 Releases published by 1 person

• v5.9-beta TypeScript 5.9 Beta

  published Jul 8, 2025

• v5.9-rc TypeScript 5.9 RC

  published Jul 24, 2025

• v5.9.2 TypeScript 5.9

  published Jul 31, 2025

14 Pull requests merged by 9 people

• 🤖 Pick PR #61978 (Restructure CI to prepare for requi...) into release-5.9

  #62164 merged Aug 1, 2025

• Intentionally regress one buggy declaration output to an older version

  #62163 merged Aug 1, 2025

• Bump version to 6.0

  #62162 merged Jul 31, 2025

• Restructure CI to prepare for required checks and merge queues

  #61978 merged Jul 31, 2025

• Fix private identifier fields generating errors in class expression declarations

  #62155 merged Jul 31, 2025

• Add format to update baselines/fix lints task

  #62160 merged Jul 31, 2025

• Give more specific errors for verbatimModuleSyntax

  #62113 merged Jul 23, 2025

• LEGO: Pull request from lego/hb_5378966c-b857-470a-8675-daebef4a6da1_20250714192406710 to main

  #62068 merged Jul 22, 2025

• Don't use noErrorTruncation when printing types with maximumLength set

  #62091 merged Jul 22, 2025

• Remove unused and confusing dom.iterable.d.ts file

  #62037 merged Jul 21, 2025

• Restore AbortSignal.abort

  #62086 merged Jul 17, 2025

• LEGO: Pull request from lego/hb_5378966c-b857-470a-8675-daebef4a6da1_20250710202354753 to main

  #62038 merged Jul 10, 2025

• Clear out checker-level stacks on pop

  #62016 merged Jul 8, 2025

• Fix for Issue 61081

  #61221 merged Jul 7, 2025

36 Pull requests opened by 15 people

• Don't defer index types for non-generic substitution types

  #61999 opened Jul 6, 2025

• Bump github/codeql-action from 3.29.1 to 3.29.2 in the github-actions group

  #62006 opened Jul 7, 2025

• Fix diagnostic code 69010 typo to 6910

  #62007 opened Jul 7, 2025

• Add approximatelySign to NumberFormatPartTypeRegistry for ES2023

  #62013 opened Jul 7, 2025

• Force inclusion of ES6, DOM.Iterable

  #62025 opened Jul 9, 2025

• Fix JSDoc @import crashes in getCompletionEntryDetails

  #62028 opened Jul 9, 2025

• Qualify enum member names when referencing in value position

  #62034 opened Jul 10, 2025

• Fix --showConfig to work when no input files are found

  #62047 opened Jul 11, 2025

• fix(Intl): make Intl.Collator.compare a getter that returns a bound function (#62048)

  #62052 opened Jul 12, 2025

• Fix JSDoc typeof parameter resolution

  #62053 opened Jul 12, 2025

• Fix: Exclude generator functions from convert-to-class suggestions

  #62066 opened Jul 14, 2025

• Fix debug assertion failure in move to file refactor for React components

  #62067 opened Jul 14, 2025

• Fix false positive "no overlap" error when comparing `this` with subclass instances

  #62070 opened Jul 15, 2025

• Fix crash when using non-null assertion on await expressions with NODE_ENV=development

  #62074 opened Jul 15, 2025

• Don't inherit JSDocs from unrelated base properties onto constructor parameters with the same names

  #62077 opened Jul 15, 2025

• Fix optional property quick info showing redundant '| undefined'

  #62084 opened Jul 16, 2025

• fix: tsconfig `extends` supporting same extensions (inc `.jsonc`) for relative and package imports (bug #43121)

  #62092 opened Jul 19, 2025

• Combine inferences from distributive conditional types

  #62093 opened Jul 20, 2025

• Change `export =` structurally to allow other exported elements in the same file

  #62103 opened Jul 22, 2025

• Don't emit redundant and invalid extra renamed keyword exports in JS files

  #62104 opened Jul 22, 2025

• Move DOM.Iterable contents to DOM, make DOM reference ES6/ES2015

  #62111 opened Jul 23, 2025

• Enable exhaustiveness checking and never narrowing for non-union types

  #62114 opened Jul 23, 2025

• Fixed Japanese translations for messages 1259, 2556, 2620, 2621, 2706, and 18046

  #62120 opened Jul 24, 2025

• Derive disposability checks from known symbols rather than global interfaces

  #62122 opened Jul 24, 2025

• Fixed reference searches related to `JsxNamespacedName`

  #62124 opened Jul 25, 2025

• Fix isolated declarations to not flag function expressions in call arguments

  #62125 opened Jul 25, 2025

• Prioritize `case` and `default` keywords in switch statement completions

  #62126 opened Jul 25, 2025

• Fix "used before being assigned" error with type assertions in LHS

  #62128 opened Jul 25, 2025

• Implement enhanced CLI error formatting

  #62130 opened Jul 26, 2025

• Add types for `RegExp.escape`

  #62138 opened Jul 28, 2025

• Fix contextual typing sensitivity to binding pattern structure in destructuring

  #62142 opened Jul 28, 2025

• Trimmed leading and trailing spaces when reading string literals after "[" and added a test case.

  #62144 opened Jul 29, 2025

• LEGO: Pull request from lego/hb_5378966c-b857-470a-8675-daebef4a6da1_20250730202607176 to main

  #62150 opened Jul 30, 2025

• Revert PR 61668

  #62158 opened Jul 31, 2025

• Enhance type argument completions

  #62170 opened Aug 1, 2025

• Use tuple context based on apparent type of the contextual type uninstantiated by return mapper

  #62174 opened Aug 1, 2025

214 Issues closed by 30 people

• Typescript compiler removes comments it ought not remove

  #62159 closed Aug 3, 2025

• Type inference incorrectly considers `const z = { ...this }` to be `z: this`

  #62154 closed Aug 3, 2025

• TSC Compiler fails with Zod v3 and fails with Zod v4

  #62172 closed Aug 2, 2025

• Class member variable types incorrectly narrowed for constant assignments when calling member functions afterwards

  #62148 closed Aug 2, 2025

• minify when compile

  #62165 closed Aug 1, 2025

• TypeScript 5.9 is added under the latest tag, but should have been the RC tag?

  #62166 closed Aug 1, 2025

• regression: Private fields appear in type literal in declarations (5.9)

  #62153 closed Jul 31, 2025

• Arrow function needs extra declaration on asserts

  #62157 closed Jul 31, 2025

• Better typing for keys when calling Object.entries

  #62152 closed Jul 31, 2025

• MDN Reference cannot be turned off.

  #62129 closed Jul 31, 2025

• in jsx/tsx, auto closing quotes not happen when cursor is at end of self closing tag.

  #41964 closed Jul 30, 2025

• Operator '<' cannot be applied to types 'boolean' and 'never'.

  #62149 closed Jul 30, 2025

• Support the Language Service being aware of the build version of TypeScript

  #43513 closed Jul 29, 2025

• Support having '@types/web' as overriding 'dom' in TypeScript's lib resolver

  #44795 closed Jul 29, 2025

• [CLI DX] Improve positioning of compiler error messaging info

  #45717 closed Jul 29, 2025

• Support closed-file diagnostics in VS Code

  #36664 closed Jul 29, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250727 vs 5.8.3

  #62137 closed Jul 28, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250727 vs 5.8.3

  #62136 closed Jul 28, 2025

• [NewErrors] 5.9.0-dev.20250727 vs 5.8.3

  #62135 closed Jul 28, 2025

• The diff is huge, so maybe this needs to run with `noLib` or some similar thing to trim down the full completion list.

  #62132 closed Jul 28, 2025

• https://github.com/automatisch/automatisch/actions/runs/16484397537/job/46606075556#step:7:30

  #62131 closed Jul 28, 2025

• Incorrect Japanese translations for messages 1259, 2556, 2620, 2621, 2706, and 18046

  #53337 closed Jul 28, 2025

• Instance types of classes with the same name as primitives are interpreted as primitive types

  #62116 closed Jul 27, 2025

• If I have multi-group character mode to create responsible objects, I want to define multi-group dynamic keys

  #62106 closed Jul 26, 2025

• Unexpected type collapse of union type at const initialization

  #62108 closed Jul 26, 2025

• EmitResolver cannot handle JsxOpeningLikeElement and JsxOpeningFragment that didn't originate from the parse tree

  #35686 closed Jul 25, 2025

• Enum used as object key is not exported in declaration

  #35329 closed Jul 25, 2025

• RangeError: Maximum call stack size exceeded (with await nested promises)

  #35289 closed Jul 25, 2025

• `getSignaturesOfType` throws `Cannot read property 'flags' of undefined`

  #33829 closed Jul 25, 2025

• Types for async functions do not handle `void` assignments like normal ones

  #33420 closed Jul 25, 2025

• Add ElementInternals, attachInternals from HTML standard

  #33218 closed Jul 25, 2025

• Imported values don't conflict with global module declarations (regression?)

  #32808 closed Jul 25, 2025

• Using && with a string produces union type with empty string

  #32455 closed Jul 25, 2025

• Union not narrowed with `typeof x.y` as a discriminant

  #32399 closed Jul 25, 2025

• Inconsistent implicit any when referencing destructured variable more than once

  #32278 closed Jul 25, 2025

• Super call of non-method incorrectly allowed if target >= ES6

  #32121 closed Jul 25, 2025

• Babel-generated module with exports["default"] not importable

  #32005 closed Jul 25, 2025

• No object literal completions for type parameter constrained to mapped type

  #16136 closed Jul 25, 2025

• Narrowed is fail when use as `T`

  #36613 closed Jul 25, 2025

• strictNullChecks allows inconsistent indexed type with spread syntax

  #36849 closed Jul 25, 2025

• Experiment with trailing comma insertion text for object literal completions

  #22854 closed Jul 25, 2025

• `ts.ImportClause.namedBindings.forEachChild()` and `getChildren()` process different number of results

  #62112 closed Jul 25, 2025

• TS2869 not fired on `stubTrue() ?? false`

  #62119 closed Jul 25, 2025

• Typescript error because nested value might be null even after I check it's not null

  #62105 closed Jul 25, 2025

• TouchList is missing Symbol.iterator, can't use with 'for..of'

  #31826 closed Jul 24, 2025

• ServiceWorkerRegistration.Update() should return Promise<ServiceWorkerRegistration>

  #31502 closed Jul 24, 2025

• react-redux type inference is broken since v3.1

  #30874 closed Jul 24, 2025

• Unconstrained generics are incorrectly assignable to _any_ "Partial" type

  #30634 closed Jul 24, 2025

• Ambient imports are not removed when importing an interface from a package & emitDecoratorMetadata is enabled

  #30490 closed Jul 24, 2025

• Adjacent .d.ts file stops working when using import path aliases

  #30339 closed Jul 24, 2025

• [BUG] Comments between export and import modules are removed

  #30298 closed Jul 24, 2025

• Merged object exports of globalThis broken

  #30159 closed Jul 24, 2025

• JSDoc @implements tag/clause not checked

  #30156 closed Jul 24, 2025

• How to import generic function type declaration from one javascript file to another?

  #29964 closed Jul 24, 2025

• tsc counts errors twice

  #29725 closed Jul 24, 2025

• Private Members with Default Value on Class Extension Compiles with Member declarations before Super call if function is called before super

  #29453 closed Jul 24, 2025

• Type checking doesn't work with extra function arguments

  #29409 closed Jul 24, 2025

• for() not compiled correctly in 3.2.2

  #29391 closed Jul 24, 2025

• Using compiled *.d.ts file produces a type error, but using the same type from the source file doesn't

  #29354 closed Jul 24, 2025

• ES5 + downlevelIteration on spread operator disables strictNullChecks

  #29347 closed Jul 24, 2025

• Constructor property inheritance is not giving an error in ES2015+ target

  #29328 closed Jul 24, 2025

• TS2739: Type is missing the following properties from type

  #29197 closed Jul 24, 2025

• output declaration type not as expect

  #29126 closed Jul 24, 2025

• Incompatible type error in regular js with JSDoc generic type annotations

  #29116 closed Jul 24, 2025

• Improve exception reporting

  #29114 closed Jul 24, 2025

• Method decorators in class expressions are silently ignored.

  #28903 closed Jul 24, 2025

• 5.9.0-beta - Type 'Buffer<ArrayBuffer>' is not assignable to type 'ArrayBuffer'

  #62109 closed Jul 24, 2025

• Badly hoisted variable declaration on tslib import

  #28849 closed Jul 24, 2025

• Suggestion: make `RequestInit.method` suggest standard verbs

  #61129 closed Jul 24, 2025

• cyclic dependency and main/module package.json breaks structural typing

  #28807 closed Jul 23, 2025

• AMD Module Names Directives Rewrite CommonJS require's.

  #28760 closed Jul 23, 2025

• "Unique symbol as the name of a private method" results in invalid .d.ts declaration

  #28383 closed Jul 23, 2025

• Property ? is missing in wrong type

  #28017 closed Jul 23, 2025

• Computed Properties aren't bound correctly during Object/Class evaluation

  #27864 closed Jul 23, 2025

• Stack overflow in long concatenating string

  #27705 closed Jul 23, 2025

• More poor errors with value/type/namespace confusion

  #27630 closed Jul 23, 2025

• Excess property errors reported on overloads report errors on the wrong overload

  #27564 closed Jul 23, 2025

• `export default interface` in augmentation shadows original default export

  #27286 closed Jul 23, 2025

• Spreading private property is wrong

  #27166 closed Jul 23, 2025

• Unexpected result of declaration emit while namespace is shared between two @types

  #27007 closed Jul 23, 2025

• noImplicitAny+prototype assignment causes incorrect error on prototype methods

  #26923 closed Jul 23, 2025

• In JS, assignment to property of class has no contextual type

  #26748 closed Jul 23, 2025

• Incorrect "Cannot find name" when importing default value

  #26391 closed Jul 23, 2025

• JS: Can't assign to superclass property

  #26284 closed Jul 23, 2025

• In JS, extra circular reference errors when referring to a missing property on `module`

  #26268 closed Jul 23, 2025

• In JS, bogus noImplicitAny error on some this-property assignments

  #26097 closed Jul 23, 2025

• Duplicated synthetic comment emit on module declarations

  #25668 closed Jul 23, 2025

• Conditional types can cause TS to miss incorrect interface extensions

  #25344 closed Jul 23, 2025

• in typescript 2.8, a common definition of Omit causes declarations that don't compile to be generated

  #25041 closed Jul 23, 2025

• Source code transpiles, but emitted declarations filled with errors

  #24876 closed Jul 23, 2025

• Object spread incorrectly compiles getter

  #24799 closed Jul 23, 2025

• Cannot augment global namespace from module due to shadowing(?)

  #24525 closed Jul 23, 2025

• Add `SharedWorker` to the library

  #24323 closed Jul 23, 2025

• Cannot create declaration files from static factory class returned from a function.

  #24226 closed Jul 23, 2025

• Revise whitespace handling in JSDoc

  #24217 closed Jul 23, 2025

• Destructuring parameter JSDoc not matched up correctly

  #24045 closed Jul 23, 2025

• "program.emit" produces wrong declaration file if "declaration" option is false or not specified

  #24002 closed Jul 23, 2025

• JSDoc referencing non-global class: Namespace 'X' has no exported member 'MyClass'

  #23936 closed Jul 23, 2025

• Suggestion: Allow interface to extend conditional type

  #23850 closed Jul 23, 2025

• CFA failure with fallthrough clauses in switch statements

  #23818 closed Jul 23, 2025

• Cannot use variable from common deconstruction into the initialising expression of another one when strictNullChecks is on

  #23774 closed Jul 23, 2025

• Callback in mapped type implicitly has 'any' type

  #23429 closed Jul 23, 2025

• Do not type check .js files in referenced node_modules under `--checkJs` and `--maxNodeModuleJsDepth` > 0

  #23219 closed Jul 23, 2025

• In JS, aliasing property assignments to JS containers should work

  #22619 closed Jul 23, 2025

• Javascript should allow non-top-level assignment to exports assignments

  #22441 closed Jul 23, 2025

• Tagged union types aren't narrowed in for/while loop

  #22046 closed Jul 23, 2025

• `this` types in intrinsic class attributes not inferred correctly

  #21662 closed Jul 23, 2025

• Destructing assignments with initializers do not affect control flow correctly in strictNullChecks

  #21146 closed Jul 23, 2025

• "Variable is used before being assigned" even though it is assigned

  #20755 closed Jul 23, 2025

• Return type inference broken for types with static members in ts 2.5; later fixed

  #20102 closed Jul 23, 2025

• JSDoc Allow lone rest type

  #19990 closed Jul 23, 2025

• JSDoc allow missing parameter names

  #19988 closed Jul 23, 2025

• JSDoc function type not parsed correctly when nested

  #19986 closed Jul 23, 2025

• JSDoc function type within generic not parsed correctly

  #19982 closed Jul 23, 2025

• No compile error for satisfying function signature of only one branch of union of two

  #19465 closed Jul 23, 2025

• Bug(?): Using attribute type of extended generic param and an intersection type

  #19379 closed Jul 23, 2025

• @ts-check complains about the object given to Object.defineProperty not having Object properties

  #18475 closed Jul 23, 2025

• Cannot implement generic type guarding function

  #18202 closed Jul 23, 2025

• Problem with destructuring + default values in the implementation of an inherited signature

  #18191 closed Jul 23, 2025

• warning on emitDecoratorMetadata for interface in esnext

  #18008 closed Jul 23, 2025

• MethodDecorator gets TS2322/TS2315

  #17936 closed Jul 23, 2025

• Seemingly wrong arguments object when both es6 and commonjs options are present

  #17866 closed Jul 23, 2025

• Don't allow `this` in decorator expressions

  #17598 closed Jul 23, 2025

• cannot redeclare exported variable

  #17547 closed Jul 23, 2025

• Generic functon doesn't resolve type property when accept this as a parameter ?

  #16791 closed Jul 23, 2025

• ES6 modules cannot use "await" as an identifier

  #8559 closed Jul 23, 2025

• Improve error message for decorator type mismatches

  #4534 closed Jul 23, 2025

• Unexpected type listing for `keyof T` on declaration file

  #17294 closed Jul 22, 2025

• 2.4: Readonly<Map<k,v>> vs. ReadonlyMap<k,v>

  #16840 closed Jul 22, 2025

• Default exported named class throw an error if there is another class with same name

  #16598 closed Jul 22, 2025

• The check "Parameter cannot be referenced in its initializer" for default parameters is too strict

  #15253 closed Jul 22, 2025

• Can not set static properties on arrow-function-initialized variables

  #14621 closed Jul 22, 2025

• Inconsistent errors for non-module entities

  #12768 closed Jul 22, 2025

• Object Spread should not invoke setter.

  #13668 closed Jul 22, 2025

• Allow pass through of class-properties

  #12212 closed Jul 22, 2025

• Support property decorators for shorthand constructor-parameter syntax

  #10777 closed Jul 22, 2025

• probable bug in typeof type guard

  #10442 closed Jul 22, 2025

• 'innerText' should not be nullable in most of Node's derived types

  #10315 closed Jul 22, 2025

• Widening after inferring null or undefined for a type parameter should be an implicit any

  #531 closed Jul 22, 2025

• Issue a more useful error when attempting to construct non-newable type

  #227 closed Jul 22, 2025

• Namespaces not merged from UMD globals

  #9329 closed Jul 22, 2025

• Module augmentation with export list

  #9127 closed Jul 22, 2025

• Exported ambient variables are neither emitted nor an error

  #8015 closed Jul 22, 2025

• Why do multiple ES6 imports compile to multiple requires / define() deps with suffixed names?

  #6137 closed Jul 22, 2025

• Handle default constructor when extending null

  #4048 closed Jul 22, 2025

• Invalid combinations of --out, --outDir, and --rootDir should cause a compiler error.

  #3305 closed Jul 22, 2025

• Assignment of string literal indexed enum member passes compilation but results in invalid javascript

  #2215 closed Jul 22, 2025

• Some comments not emitted - upgrade 1.0.1 to 1.3.0

  #1311 closed Jul 22, 2025

• Improve error messages for duplicate identifiers

  #529 closed Jul 22, 2025

• Give better error messages down the line when generic merged interfaces have different type parameters

  #6248 closed Jul 22, 2025

• Assignability error reporting should have a more specific error for unions

  #6541 closed Jul 22, 2025

• Emitted extends clause should come after deatched-comment at the top of the file

  #7038 closed Jul 22, 2025

• WebWorker and dom lib does not support transfers in the type for postMessage

  #12657 closed Jul 22, 2025

• Incorrect type definition for "ErrorEvent" in "lib.es6.d.ts"

  #12666 closed Jul 22, 2025

• User-defined type guard method can be overridden with any non-type-guard return type

  #27687 closed Jul 22, 2025

• Incorrect `any` displayed in type with noErrorTruncation: true

  #62032 closed Jul 22, 2025

• Efikcoin staking core

  #62096 closed Jul 21, 2025

• No way to restrict object/Record keys to unique Symbols

  #62100 closed Jul 21, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250720 vs 5.8.3

  #62098 closed Jul 21, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250720 vs 5.8.3

  #62099 closed Jul 21, 2025

• [NewErrors] 5.9.0-dev.20250720 vs 5.8.3

  #62097 closed Jul 21, 2025

• Controlled runtime inference for trusted pure functions (secureInference)

  #62088 closed Jul 21, 2025

• CFA doesn't see non executable code

  #15089 closed Jul 20, 2025

• strictNullChecks false-positive when returning or breaking from within loop

  #14143 closed Jul 20, 2025

• 5.9-beta regression, Effect-TS's Effect result typed as any

  #62090 closed Jul 19, 2025

• Covariance in intersection

  #62049 closed Jul 19, 2025

• Suggestion: add excludeTypeRoots to tsconfig

  #62089 closed Jul 18, 2025

• Changing or reloading the current page via location should cause unreachable code error

  #62073 closed Jul 18, 2025

• Linter didn't detect { [x: string]: any; }[] !== { [x: string]: any; }

  #62087 closed Jul 17, 2025

• Global classes allow `globalThis.ClassName` but not `typeof globalThis.ClassName`

  #62078 closed Jul 17, 2025

• Error: Debug Failure. False expression.

  #52952 closed Jul 17, 2025

• Implicit `this` parameter bypasses assignability checks with derived methods

  #62055 closed Jul 17, 2025

• Unexpected behavior of enum keys while evaluating mapped types

  #62051 closed Jul 17, 2025

• Missing parser error for arguments in class field

  #62062 closed Jul 17, 2025

• Typesafety violation

  #62043 closed Jul 17, 2025

• `configFileName` on `ProjectInfo` returns `projectName` which is inconsistent with commented behavior

  #62082 closed Jul 16, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250713 vs 5.8.3

  #62061 closed Jul 15, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250713 vs 5.8.3

  #62060 closed Jul 15, 2025

• [NewErrors] 5.9.0-dev.20250713 vs 5.8.3

  #62059 closed Jul 15, 2025

• (not) Deprecating `--rootDirs`

  #61885 closed Jul 15, 2025

• This comparison appears to be unintentional because the types 'this' and <derived class> have no overlap.

  #62057 closed Jul 14, 2025

• is symbol type permitted as a computed property name in an interface ?

  #62064 closed Jul 14, 2025

• Type renders to any

  #62063 closed Jul 14, 2025

• TypeScript compiler cannot find `ReferrerPolicy` & `RequestDestination` in `node_modules/@types/react-dom`

  #62044 closed Jul 13, 2025

• [TypeScript] Can't infer type from `switch` and conditions

  #62042 closed Jul 13, 2025

• Intellisense doesn't use JSDocs `@requires` for registering types

  #62039 closed Jul 13, 2025

• Function signature overload with rest parameter : TS picks the wrong signature when called with argument `any[]`

  #62000 closed Jul 11, 2025

• Function signature overload with rest parameter: TS picks the wrong signature

  #62019 closed Jul 11, 2025

• Enum const members set to -0 get compiled into 0

  #61993 closed Jul 11, 2025

• Improve inference of return types of generic functions.

  #62018 closed Jul 11, 2025

• Module resolution: node20 not working in typescript@5.9-beta

  #62036 closed Jul 10, 2025

• "Typescript: Remove unused imports" does not take into consideration if an import is valid or not

  #62017 closed Jul 10, 2025

• Feature request: Allow to combine default type import with named imports

  #61972 closed Jul 10, 2025

• Not showing imports in `Quick Fix` suggestions

  #62012 closed Jul 10, 2025

• BUG: Tags syntax highlighting in `React` components doesnt work for components that have `children`

  #62015 closed Jul 10, 2025

• constraint causes too specific generic type inference

  #61989 closed Jul 10, 2025

• `NaN && 1` gets incorrectly typed as `0 | 1`

  #61988 closed Jul 10, 2025

• Abstract Members Not Properly Validated in Multiple Mixin Composition

  #62014 closed Jul 10, 2025

• Enable to infer the parameter's type correctly in this case. Why?

  #62026 closed Jul 9, 2025

• JS/TS language service crashes & endless “Analyzing…” / formatter-hang due to Copilot-Chat watcher storm (vscode-chat-code-block paths)

  #61985 closed Jul 9, 2025

• Release notes for 5.8.3 link to nonexistent milestone

  #62020 closed Jul 8, 2025

• Unable to use the rename symbol option - exception thrown

  #61984 closed Jul 7, 2025

• Array.splice "deleteCount" argument description is somewhat insufficient

  #61081 closed Jul 7, 2025

• Allow `rewriteRelativeImportExtensions` to be used with import `paths` aliases

  #61991 closed Jul 7, 2025

• Typescript problems won't update after removing folder with typescript project

  #62010 closed Jul 7, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250706 vs 5.8.3

  #62005 closed Jul 7, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250706 vs 5.8.3

  #62004 closed Jul 7, 2025

• [NewErrors] 5.9.0-dev.20250706 vs 5.8.3

  #62002 closed Jul 7, 2025

• Test ticket for A2A protocol

  #61998 closed Jul 7, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250629 vs 5.8.3

  #61970 closed Jul 7, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250629 vs 5.8.3

  #61969 closed Jul 7, 2025

• [NewErrors] 5.9.0-dev.20250629 vs 5.8.3

  #61968 closed Jul 7, 2025

• Incorrect `expected expression, got '.'` error

  #62003 closed Jul 6, 2025

• `rootDirs` / `outDir` options behaviour change depending on files

  #62001 closed Jul 6, 2025

48 Issues opened by 45 people

• Confusing in narrowing and property access on type parameter with `never` base constraint

  #62178 opened Aug 2, 2025

• Issues around casting tuples to arrays

  #62177 opened Aug 2, 2025

• No error on self-referencing type parameter of non-generic mapped type

  #62176 opened Aug 2, 2025

• type BufferSource has changed, causing my project to not pass

  #62168 opened Aug 1, 2025

• Inferred return type of functions in array allows incorrect value for optional property of return type

  #62167 opened Aug 1, 2025

• Bloomberg feedback for 5.9

  #62156 opened Jul 31, 2025

• Proposal: repurpose "is" operator for a narrowing version of "satisfies"

  #62146 opened Jul 29, 2025

• Imperative type definition

  #62145 opened Jul 29, 2025

• respect pragma for imports on sort

  #62147 opened Jul 29, 2025

• compiler memory leak in 5.8.x and upwards

  #62143 opened Jul 28, 2025

• Regression in generic inference with JSX in v5.7+

  #62140 opened Jul 28, 2025

• [error] TSServer exited. Code: null. Signal: SIGTERM on VSCode output - but Typescript still runs in the background

  #62139 opened Jul 28, 2025

• All types of ECMAScript NativeErrors are always subtype reduced between themselves

  #62134 opened Jul 27, 2025

• `x && x` should not be `NonNullable`

  #62133 opened Jul 27, 2025

• Duplicate imports when using "Update Imports On Paste"

  #62141 opened Jul 26, 2025

• "used before being assigned" fires on LHS inside parens/type assertion

  #62127 opened Jul 25, 2025

• Go-to-Definition/Find all References/… with `JsxNamespacedName` are not working

  #62123 opened Jul 24, 2025

• Suggestion: Derive disposability checks from known symbols rather than global interfaces

  #62121 opened Jul 24, 2025

• No completion for properties in object type unless comma or semicolon is used

  #62117 opened Jul 24, 2025

• Type Assertion for Function Parameters

  #62110 opened Jul 23, 2025

• Adding a space after the string literal in a computed property name causes an incorrect hover display

  #62101 opened Jul 21, 2025

• Refactor -> `Move to a new file`/`Move to file` fail if contains dependency function call

  #62115 opened Jul 21, 2025

• Spread operator allows invalid return type in record data types

  #62095 opened Jul 20, 2025

• [isolatedDeclarations] function expressions as an argument to a function call that is exported are reported as needing an annotation

  #62085 opened Jul 17, 2025

• Google feedback on TS 5.9-beta

  #62083 opened Jul 16, 2025

• `export { _void as void }` leads to exporting duplicate identifiers

  #62081 opened Jul 16, 2025

• [tsserver] Multi-project goto definition with accurate results

  #62080 opened Jul 16, 2025

• Unable to infer parameters for generic constructor/functions with a distributive conditional type

  #62079 opened Jul 16, 2025

• HTMLElement inherits onerror and addListener("error" definitions that are unique to Window

  #62075 opened Jul 15, 2025

• "await x as any" - Node PartiallyEmittedExpression did not pass test 'isLeftHandSideExpression' assert triggered

  #62072 opened Jul 15, 2025

• Type inference regression on function calls not saved to variables, due to #61668

  #62071 opened Jul 15, 2025

• Derived class constructor parameter incorrectly inherits JSDoc from parent class's field of the same name

  #62069 opened Jul 15, 2025

• default-exporting symbol doesn't show `@deprecated` reason

  #62058 opened Jul 13, 2025

• [Typescript] Give a visual indicator when overriding methods with the `@sealed` js/tsdoc annotation

  #62076 opened Jul 13, 2025

• Generator functions trigger TS80002

  #62056 opened Jul 13, 2025

• `invalidateResolutionsOfFailedLookupLocations` hogs the CPU for a large project

  #62054 opened Jul 12, 2025

• Control Flow Analysis Performance Regression

  #62050 opened Jul 12, 2025

• [TypeScript] Rename Symbol doesn't work as expected with Declaration Merging

  #62065 opened Jul 11, 2025

• Intl.Collator#compare method type does not match spec

  #62048 opened Jul 11, 2025

• Solution builder not detecting out of date compiler options

  #62035 opened Jul 10, 2025

• Shouldn't TypeScript be able to polyfill `import defer` with `Proxy` to work with `"module": "commonjs"`?

  #62031 opened Jul 9, 2025

• JSDoc `@import` causes `getCompletionEntryDetails` to crash

  #62027 opened Jul 9, 2025

• Deprioritise properties of the form `{ prop?: never }` in completions

  #62024 opened Jul 9, 2025

• Support `@import` JSDoc tag for auto-imports

  #62008 opened Jul 7, 2025

• importing merged declorations in js files

  #61997 opened Jul 5, 2025

• VSCode not respecting declaration map without absolute sourceRoot

  #62009 opened Jul 5, 2025

• Inconsistent behavior with Generic ElementType

  #61995 opened Jul 3, 2025

• `export let` variable doesn't require the variable to be assigned within current file

  #61994 opened Jul 3, 2025

147 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• Add the type of Intl.DurationFormat to the lib.

  #60646 commented on Aug 2, 2025 • 2 new comments

• Fix switch-true case-true narrowing to behave equivalently to default case

  #59459 commented on Jul 18, 2025 • 2 new comments

• Fix using transform variable shadowing in for-of loops

  #61934 commented on Aug 1, 2025 • 1 new comment

• Check expression operand equivalence in isMatchingReference before computing property key equivalence

  #61608 commented on Jul 7, 2025 • 1 new comment

• Defer checking of class static blocks

  #59607 commented on Jul 3, 2025 • 1 new comment

• TypeScript class method decorator not rendering properly in version >= 1.63.2

  #47679 commented on Jul 3, 2025 • 0 new comments

• Allow `this` in constructor parameter

  #38038 commented on Jul 30, 2025 • 0 new comments

• ScriptKind.Deferred treated as LanguageVariant.Standard

  #60125 commented on Jul 31, 2025 • 0 new comments

• Add ES2025 target and library

  #61735 commented on Jul 31, 2025 • 0 new comments

• rewriteRelativeImportExtensions: tsc doesn't rewrite extensions in emitted declaration files

  #61037 commented on Jul 31, 2025 • 0 new comments

• TypeScript 5.9 Iteration Plan

  #61648 commented on Jul 31, 2025 • 0 new comments

• Double slash comment `//` will be wrongly removed in the trailing position of the object attribute

  #56055 commented on Jul 31, 2025 • 0 new comments

• Safe type assertion (upcast / widening) operator

  #56235 commented on Jul 31, 2025 • 0 new comments

• Support import types in JSDoc links

  #43950 commented on Aug 1, 2025 • 0 new comments

• Completions for type arguments of expressions

  #61751 commented on Aug 1, 2025 • 0 new comments

• Autocomplete on extends keyof generic

  #28662 commented on Aug 1, 2025 • 0 new comments

• Commit characters are not reset inside typescript object property key strings

  #62161 commented on Aug 1, 2025 • 0 new comments

• Allow use of `infer` in the type parameter of a type declaration

  #52791 commented on Aug 1, 2025 • 0 new comments

• Custom JSDoc type cannot be extended

  #62021 commented on Aug 2, 2025 • 0 new comments

• 6.0 Deprecation Candidates

  #54500 commented on Aug 2, 2025 • 0 new comments

• disallow comparing to null and undefined unless they are valid cases in strict null mode

  #11920 commented on Aug 2, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Aug 2, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Aug 2, 2025 • 0 new comments

• Cannot infer generic argument type from passed callback

  #31146 commented on Jul 24, 2025 • 0 new comments

• Incorrect union type inference for conjunction with strictNullChecks disabled

  #31789 commented on Jul 24, 2025 • 0 new comments

• Use context to prioritize or only show `case` and `default` in a `switch` statement

  #52234 commented on Jul 25, 2025 • 0 new comments

• Source Map includes mapping for line ending characters

  #34695 commented on Jul 25, 2025 • 0 new comments

• Allow tsconfig.json when input files are specified

  #27379 commented on Jul 26, 2025 • 0 new comments

• `strictPropertyInitialization` should allow private initialization helpers

  #32194 commented on Jul 27, 2025 • 0 new comments

• Proposal: Follow program flow in constructor when strictPropertyInitialization = true

  #30462 commented on Jul 27, 2025 • 0 new comments

• Proposal: Partial Type Argument Inference

  #26242 commented on Jul 27, 2025 • 0 new comments

• Add types for RegExp.escape

  #61321 commented on Jul 27, 2025 • 0 new comments

• JSX: Add a way to specify children as not a part of props

  #18357 commented on Jul 28, 2025 • 0 new comments

• Add types for window.performance.getEntriesByType

  #33866 commented on Jul 28, 2025 • 0 new comments

• Unable to use `@ts-ignore` in JSDoc comments.

  #47392 commented on Jul 28, 2025 • 0 new comments

• String union types narrowed to falsy should narrow string to ""

  #45329 commented on Jul 29, 2025 • 0 new comments

• querySelector return type could be more specific for compound selectors

  #29037 commented on Jul 30, 2025 • 0 new comments

• Allow async functions to return union type T | Promise<T>

  #33595 commented on Jul 30, 2025 • 0 new comments

• Support @ts-ignore for specific errors

  #19139 commented on Jul 30, 2025 • 0 new comments

• Module resolution using nodenext and a wildcard in package.json exports

  #55021 commented on Jul 30, 2025 • 0 new comments

• Crash when defining `Array` type via `[]` syntax

  #57009 commented on Aug 2, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Aug 2, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Aug 2, 2025 • 0 new comments

• Error not issued when global type is an alias of an object type literal

  #57564 commented on Aug 2, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Aug 2, 2025 • 0 new comments

• Move to File and Move to new File not working to React components

  #62029 commented on Aug 2, 2025 • 0 new comments

• Autocompletion fails - unnecessarily narrow for inferred Generic

  #52726 commented on Aug 2, 2025 • 0 new comments

• TypeScript: 3 connected together BUGS in `Refactor: move to file`

  #62022 commented on Aug 2, 2025 • 0 new comments

• Allow more things to be evaluated in enum members with template expression initializers

  #55696 commented on Jul 29, 2025 • 0 new comments

• Use `...args: never` in builtin conditional type helpers

  #55714 commented on Jul 30, 2025 • 0 new comments

• Fixed an issue with intersected abstract properties not requiring to be implemented

  #56751 commented on Jul 7, 2025 • 0 new comments

• Keep returned (and yielded) literal types as const when their types using `const` type variables

  #56859 commented on Jul 30, 2025 • 0 new comments

• Make generic arrays indexable by `numericStringType`

  #56878 commented on Jul 30, 2025 • 0 new comments

• Evaluate expressions with annotated constant variables

  #57236 commented on Jul 30, 2025 • 0 new comments

• Fix private properties not being allowed in optional chains

  #60263 commented on Jul 21, 2025 • 0 new comments

• Don't compare "missing" to `undefined` in `compareProperties` under `exactOptionalPropertyTypes`

  #61683 commented on Jul 21, 2025 • 0 new comments

• Fixed `anyFunctionType` leak

  #61980 commented on Jul 7, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Aug 2, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Aug 2, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Aug 2, 2025 • 0 new comments

• Support Intellisense for string/number literals in a widened union

  #33471 commented on Aug 2, 2025 • 0 new comments

• Implicit Symbol.iterator call in for..of loops / spread destructuring doesn't infer `this` generic type parameter

  #38388 commented on Aug 2, 2025 • 0 new comments

• improper declared type cause narrow type not work when its computed type is not union.

  #39114 commented on Aug 2, 2025 • 0 new comments

• In JSDoc @type is not a type declaration, which it is much more like type conversion.

  #39650 commented on Aug 2, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Aug 2, 2025 • 0 new comments

• Error when trying to assign a subclass of a base class with generics to `typeof` of that base class

  #41770 commented on Aug 2, 2025 • 0 new comments

• Correctly handle generic functions (e.g.: `Object.freeze`) passed as callbacks to generic functions (e.g.: `Array.prototype.map`)

  #42862 commented on Aug 2, 2025 • 0 new comments

• Broken emit when `Infinity` or `‑Infinity` ends up in a type position

  #42905 commented on Aug 2, 2025 • 0 new comments

• Typescript 4.2.x - incorrectly infered generic return type of a record union (extra undefined)

  #43943 commented on Aug 2, 2025 • 0 new comments

• Support inferring `never` as the return type in JavaScript when overriding a class method that returns `never`

  #46791 commented on Aug 2, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Aug 2, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Aug 2, 2025 • 0 new comments

• Order of ReadonlySet/ReadonlyMap in union causes differing key inference

  #52313 commented on Aug 2, 2025 • 0 new comments

• Expression produces a union type that is too complex to represent

  #53234 commented on Aug 2, 2025 • 0 new comments

• tsconfig.json "lib": "dom" should include "dom.iterable"(?)

  #60959 commented on Jul 9, 2025 • 0 new comments

• Support `satisfies` in type declaration

  #52222 commented on Jul 9, 2025 • 0 new comments

• VS Code removes trailing comma in export statement

  #62030 commented on Jul 9, 2025 • 0 new comments

• Comment like jsx text emitted twice when preserve enabled

  #61860 commented on Jul 9, 2025 • 0 new comments

• Type annotation for all exports in the module

  #38511 commented on Jul 9, 2025 • 0 new comments

• Typeguards with destructuring parameters

  #28311 commented on Jul 9, 2025 • 0 new comments

• Ambient Module Declarations for Import Attributes (formerly known as Import Assertions)

  #46135 commented on Jul 10, 2025 • 0 new comments

• Request: Way to target Compound Components (eg. React) in a theme specifically. (<MyComponent.*>)

  #62040 commented on Jul 10, 2025 • 0 new comments

• Dual ESM/CJS emit with tsc

  #54593 commented on Jul 11, 2025 • 0 new comments

• TSC --showConfig throws error instead of listing configuration

  #48443 commented on Jul 11, 2025 • 0 new comments

• `types-registry` keeps installing every time VS Code starts even if explicitly disabled

  #60487 commented on Jul 13, 2025 • 0 new comments

• es2022 transpiles class fields to static init blocks

  #48145 commented on Jul 13, 2025 • 0 new comments

• Treat `T[keyof T]` as covariant (rather than invariant) during variance measurement

  #52083 commented on Jul 14, 2025 • 0 new comments

• Extend JSDoc @this to JavaScript class - apply @this to every non-static method

  #62041 commented on Jul 14, 2025 • 0 new comments

• Ability for checker to resolve modules by node similar to program when providing custom host

  #61941 commented on Jul 14, 2025 • 0 new comments

• Immutable-By-Default Flags

  #32758 commented on Jul 14, 2025 • 0 new comments

• Strawperson TypeScript integration for Record & Tuple

  #49243 commented on Jul 14, 2025 • 0 new comments

• False positive 'This condition will always return false' comparing `this` with an instance of a subclass

  #46709 commented on Jul 15, 2025 • 0 new comments

• Incorrect type declarations for a constant inside a namespace merged with an enum

  #61944 commented on Jul 4, 2025 • 0 new comments

• Different types based on visibility

  #43553 commented on Jul 6, 2025 • 0 new comments

• Allow for optional index signatures (for the sake of `exactOptionalPropertyTypes`)

  #46969 commented on Jul 6, 2025 • 0 new comments

• [isolatedDeclarations] Optional parameter properties are unnecessarily disallowed in isolatedDeclarations mode

  #61501 commented on Jul 7, 2025 • 0 new comments

• `@experimental` JSDoc tag, with strikethrough style (or similar) like `@deprecated` JSDoc tag

  #56808 commented on Jul 7, 2025 • 0 new comments

• Diagnostic code `69010` may be typo of `6910`?

  #61971 commented on Jul 7, 2025 • 0 new comments

• The parsing problem of the compiler under specific syntax combinations

  #61975 commented on Jul 7, 2025 • 0 new comments

• Unexpected circularity error when variable is initialized from a class member

  #61606 commented on Jul 7, 2025 • 0 new comments

• Type '`x.y.${Name}`' does not satisfy the constraint '`${string}.${Name}`'.(2344)

  #61990 commented on Jul 7, 2025 • 0 new comments

• Missing errors in generic functions in context-sensitive arguments

  #61979 commented on Jul 7, 2025 • 0 new comments

• NumberFormatPartTypeRegistry doesn't have approximatelySign in it

  #61960 commented on Jul 7, 2025 • 0 new comments

• Allow type annotation on catch clause variable

  #20024 commented on Jul 7, 2025 • 0 new comments

• Autocomplete Filepath Strings.

  #42054 commented on Jul 7, 2025 • 0 new comments

• Missing constraint error in instantiation expression for a nested class

  #61982 commented on Jul 8, 2025 • 0 new comments

• add a modifier for pure functions

  #7770 commented on Jul 8, 2025 • 0 new comments

• @types dependency resolution can reference incorrect version

  #59173 commented on Jul 8, 2025 • 0 new comments

• Ignore non-ts/js files in move to file refactor

  #56749 commented on Jul 9, 2025 • 0 new comments

• Compiler Option typeTruncationLength

  #59035 commented on Jul 9, 2025 • 0 new comments

• Module Resolution: imports with JSON assertion should not need flag when module is esnext

  #54929 commented on Jul 15, 2025 • 0 new comments

• TypeScript does not recognize unreachable code after a method returning never is called outside of its defining scope

  #59138 commented on Jul 21, 2025 • 0 new comments

• Hover documentation for typescript uses jsdoc rules and not tsdoc

  #61603 commented on Jul 22, 2025 • 0 new comments

• Type narrowing not working for unions of tuples with object literals

  #31613 commented on Jul 22, 2025 • 0 new comments

• Typescript crashes in VS Code insiders latest build with all extensions disabled and TypeScript Nightly extension

  #52353 commented on Jul 22, 2025 • 0 new comments

• `as enum` assertion for object literals

  #60790 commented on Jul 22, 2025 • 0 new comments

• Type named capture groups better

  #32098 commented on Jul 22, 2025 • 0 new comments

• RegExp literal flag types

  #38671 commented on Jul 22, 2025 • 0 new comments

• Provide way to link to other files from JSDoc comments

  #47718 commented on Jul 23, 2025 • 0 new comments

• JSDoc optional/required variant doesn't play well with multi-@param RecordType declarations

  #23397 commented on Jul 23, 2025 • 0 new comments

• Typescript failed to expand type in generic for unknown reason

  #28545 commented on Jul 23, 2025 • 0 new comments

• Feature Request: allow exclusion of node_modules when skipLibCheck is false

  #30511 commented on Jul 23, 2025 • 0 new comments

• Find All References fails for CommonJS named exports in checkJs Mode

  #60094 commented on Jul 24, 2025 • 0 new comments

• TypeScript 5.8 Iteration Plan

  #61023 commented on Jul 24, 2025 • 0 new comments

• Provide per-project build progress in `tsc -b`

  #53763 commented on Jul 24, 2025 • 0 new comments

• Exhaustiveness checking against an enum only works when the enum has >1 member.

  #23572 commented on Jul 24, 2025 • 0 new comments

• missing 'used before declaration' error within computed name of accessor or method

  #29137 commented on Jul 24, 2025 • 0 new comments

• Inaccurate error or buggy behavior for JSDoc @typedef tags

  #30155 commented on Jul 24, 2025 • 0 new comments

• Enum redeclared as var inside block scope

  #30585 commented on Jul 24, 2025 • 0 new comments

• Inlay hints will be disabled after extending constructor function in Mixin Implementation using Typescript

  #62023 commented on Jul 15, 2025 • 0 new comments

• Bug: string is not a string

  #60764 commented on Jul 16, 2025 • 0 new comments

• Module "..." cannot be named without a reference to "..." error when decl emitting references to nested modules

  #48212 commented on Jul 16, 2025 • 0 new comments

• Property does not exist on `globalThis` immediately after declaring it

  #39504 commented on Jul 16, 2025 • 0 new comments

• Show unused public properties and methods

  #29293 commented on Jul 16, 2025 • 0 new comments

• JSON modules without "allowSyntheticDefaultImports"

  #47862 commented on Jul 16, 2025 • 0 new comments

• Disable formatting a region of code using directives

  #18261 commented on Jul 17, 2025 • 0 new comments

• [FR] `"javascript/typescript.preferences.importModuleSpecifier": "no-relative-parent-imports"`

  #54955 commented on Jul 17, 2025 • 0 new comments

• No narrowing on assert.strictEqual()

  #48244 commented on Jul 17, 2025 • 0 new comments

• Disable type checking for node_modules entirely

  #40426 commented on Jul 18, 2025 • 0 new comments

• disable certain global types for specific files, or specify type roots for specific files.

  #37053 commented on Jul 18, 2025 • 0 new comments

• JSDoc export type support

  #48104 commented on Jul 18, 2025 • 0 new comments

• Allow users to customize the variance of built-in `Array`

  #52621 commented on Jul 18, 2025 • 0 new comments

• T | (() => T)

  #37663 commented on Jul 19, 2025 • 0 new comments

• tsconfig should support suffix `.jsonc`

  #43121 commented on Jul 19, 2025 • 0 new comments

• export default type

  #41409 commented on Jul 19, 2025 • 0 new comments

• Function should be assignable to (...args: any[]) => any

  #20007 commented on Jul 20, 2025 • 0 new comments

• Trade-offs in Control Flow Analysis

  #9998 commented on Jul 21, 2025 • 0 new comments