2 Pull requests merged by 2 people

• Allow --module bundler --moduleResolution commonjs

  #62320 merged Aug 22, 2025

• Bump the github-actions group with 2 updates

  #62299 merged Aug 18, 2025

5 Pull requests opened by 3 people

• Consistently error on attempts to access private properties on generic objects

  #62300 opened Aug 18, 2025

• Disable package.json conditional exports fallback lookups

  #62310 opened Aug 20, 2025

• Fix parenthesizer rules for manually constructed binary expressions with `??` and `||`/`&&` mix

  #62311 opened Aug 21, 2025

• Narrow by constant element access callees

  #62314 opened Aug 21, 2025

• Feat/58561 allow leading underscore to bypass no unused locals

  #62323 opened Aug 22, 2025

29 Issues closed by 8 people

• Add definite assignment checks for interacting with `noUncheckedIndexAccess`

  #47998 closed Aug 24, 2025

• Types for new `CookieStore` API

  #62316 closed Aug 24, 2025

• Issues around casting tuples to arrays

  #62177 closed Aug 24, 2025

• Circular reference error even when overridden with "as"

  #62223 closed Aug 24, 2025

• Type inference fails when type narrowing occurs within a loop

  #62279 closed Aug 24, 2025

• IntelliSense is broken for Angular Material in standalone Components in VSCode

  #62301 closed Aug 24, 2025

• TypeScript falls back to generic constraint instead of inferred type when object contains function properties

  #62204 closed Aug 24, 2025

• Allow subclass access to generic type parameters of base class (TOptions in Mapper<TLocal, TRemote, TOptions>)

  #62222 closed Aug 23, 2025

• Option to ignore `.d.ts` or default to goToSourceDefinition

  #62254 closed Aug 23, 2025

• Return type incorrectly narrowed to intersection instead of union

  #62217 closed Aug 23, 2025

• Blob constructor no longer accepts a TypedArray input (ts5.9)

  #62324 closed Aug 23, 2025

• Path aliases should work with `require.context`

  #62315 closed Aug 22, 2025

• Interface with Required<UnionType> parameter not enforced when implementation accepts UnionType

  #62226 closed Aug 22, 2025

• Weird behaviour when parsing enum names with JSON.parse()

  #62302 closed Aug 22, 2025

• confusingly statement

  #62276 closed Aug 22, 2025

• Add readonly property detection in conditional types

  #62280 closed Aug 22, 2025

• Should we set '"types": []' for 'tsc init'?

  #39354 closed Aug 21, 2025

• [ServerErrors][TypeScript] 6.0.0-dev.20250817 vs 5.9.2

  #62298 closed Aug 21, 2025

• [NewErrors] 6.0.0-dev.20250817 vs 5.9.2

  #62296 closed Aug 21, 2025

• in operator as type guard / narrowing for partial records and similar objects

  #62303 closed Aug 21, 2025

• Internal compiler errors on complex expressions, bug was briefly fixed only in TS 4.7.4

  #62282 closed Aug 21, 2025

• Resolve type structure with optional properties

  #62216 closed Aug 21, 2025

• Infer-only function generics

  #62182 closed Aug 21, 2025

• [ServerErrors][JavaScript] 6.0.0-dev.20250817 vs 5.9.2

  #62297 closed Aug 20, 2025

• [ServerErrors][TypeScript] 6.0.0-dev.20250810 vs 5.9.2

  #62251 closed Aug 20, 2025

• `tsc --init` created `tsconfig.json` is not compatible with `JSON.parse()`

  #62286 closed Aug 20, 2025

• Typescript incorrectly infers array typing after applying a non-falsy filter

  #62284 closed Aug 18, 2025

• I don't know what title to enter, please change

  #62287 closed Aug 18, 2025

• Missing type-error for inconsistency between overloaded function signature and actual implementation.

  #62288 closed Aug 18, 2025

14 Issues opened by 14 people

• TypeScript plugins do not support ESM-only packages

  #62326 opened Aug 24, 2025

• union with undefined not shown in type hint tooltip regression bug

  #62325 opened Aug 23, 2025

• `type readonly = ...` and `interface readonly ...` are considered valid

  #62322 opened Aug 22, 2025

• Design Meeting Notes, 8/22/2025

  #62321 opened Aug 22, 2025

• Multiple keys being remapped to same key causes unstable modifier propagation

  #62318 opened Aug 22, 2025

• Support for `throws` keyword like Java

  #62317 opened Aug 22, 2025

• Automatically added TypeScript import on save is incorrectly type import

  #62319 opened Aug 22, 2025

• const/readonly assertion support for `Map` and `Set`

  #62312 opened Aug 21, 2025

• Import intellisense not working when installing non-compiled package as a devDependency

  #62313 opened Aug 21, 2025

• JSDoc present in mapped types is not output in generated type literals in declaration files

  #62309 opened Aug 20, 2025

• Improved `NumberConstructor` for literal types

  #62308 opened Aug 20, 2025

• Manually constructed nullish coalescing + OR AST is missing parentheses when printed

  #62307 opened Aug 20, 2025

• Contextual typing doesn't work when mixing up discriminated unions with function variant

  #62306 opened Aug 20, 2025

• Incorrect emitted declaration for unique symbol re-assignment

  #62305 opened Aug 19, 2025

88 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.

• Fixed an issue with mapped property symbol not displaying added `| undefined` when its origin symbol was optional

  #59957 commented on Aug 23, 2025 • 6 new comments

• Discard types that reduce to `never` before discriminating by discriminable items

  #62275 commented on Aug 20, 2025 • 0 new comments

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

  #42905 commented on Aug 24, 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 24, 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 24, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Aug 24, 2025 • 0 new comments

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

  #39650 commented on Aug 24, 2025 • 0 new comments

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

  #39114 commented on Aug 24, 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 24, 2025 • 0 new comments

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

  #33471 commented on Aug 24, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Aug 24, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Aug 24, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Aug 24, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Aug 24, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Aug 24, 2025 • 0 new comments

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

  #11920 commented on Aug 24, 2025 • 0 new comments

• Allow leading underscore for types to bypass noUnusedLocals warning

  #58561 commented on Aug 23, 2025 • 0 new comments

• Class field initialization order different between target ES2021 and ES2022

  #52331 commented on Aug 22, 2025 • 0 new comments

• Component not always a valid JSX component depending on a generic type

  #54702 commented on Aug 22, 2025 • 0 new comments

• `EventTarget` doesnt friends with listeners callback that want to accept `CustomEvent` which inherits `Event`

  #62233 commented on Aug 22, 2025 • 0 new comments

• `controller.byobRequest` type incorrectly says value is possibly null while `autoAllocateChunkSize` is present.

  #62224 commented on Aug 22, 2025 • 0 new comments

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

  #62115 commented on Aug 21, 2025 • 0 new comments

• TypeScript Language Features: `Analyzing '...' and its dependencies` takes crazy long time!

  #62230 commented on Aug 21, 2025 • 0 new comments

• Improve inference by not considering thisless functions to be context-sensitive

  #62243 commented on Aug 22, 2025 • 0 new comments

• Fix JSX attribute completion for union types containing string-like t…

  #62242 commented on Aug 21, 2025 • 0 new comments

• Consider `as const` expressions as potentially context sensitive

  #62221 commented on Aug 21, 2025 • 0 new comments

• Fixed more ghost errors after LSP requests caching wrong contextual and parameter types

  #62184 commented on Aug 18, 2025 • 0 new comments

• Combine inferences from distributive conditional types

  #62093 commented on Aug 20, 2025 • 0 new comments

• Error on destructured nullables

  #60121 commented on Aug 24, 2025 • 0 new comments

• Add source mappings for serialized properties with available declaration

  #60005 commented on Aug 19, 2025 • 0 new comments

• Filter out classes with private members from the contextual types for object literal nodes

  #56183 commented on Aug 23, 2025 • 0 new comments

• `inherit` keyword as shorthand to refer to super class fields and methods.

  #36165 commented on Aug 24, 2025 • 0 new comments

• Regression with TS 5. Type instantiation is excessively deep and possibly infinite.ts(2589)

  #53514 commented on Aug 24, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Aug 24, 2025 • 0 new comments

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

  #57564 commented on Aug 24, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Aug 24, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Aug 24, 2025 • 0 new comments

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

  #57009 commented on Aug 24, 2025 • 0 new comments

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

  #53234 commented on Aug 24, 2025 • 0 new comments

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

  #52313 commented on Aug 24, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Aug 24, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Aug 24, 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 24, 2025 • 0 new comments

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

  #43943 commented on Aug 24, 2025 • 0 new comments

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

  #62178 commented on Aug 20, 2025 • 0 new comments

• Revert ts5.9 changes for Uint8Array

  #62240 commented on Aug 20, 2025 • 0 new comments

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

  #62176 commented on Aug 20, 2025 • 0 new comments

• package.json `exports` resolution uses fallback conditions, unlike Node

  #50762 commented on Aug 20, 2025 • 0 new comments

• Ghost error in a circular situation

  #62181 commented on Aug 20, 2025 • 0 new comments

• Generics in union should be inferred as `never` when possible

  #62248 commented on Aug 20, 2025 • 0 new comments

• Affine types / ownership system

  #16148 commented on Aug 20, 2025 • 0 new comments

• Support `@var` or `@member` JSDoc tags

  #56674 commented on Aug 20, 2025 • 0 new comments

• Stronger existence guarantees for `declare`

  #62290 commented on Aug 20, 2025 • 0 new comments

• keyword to force calling the super on any method

  #21388 commented on Aug 19, 2025 • 0 new comments

• Allow explicit fallthrough when noFallthroughCasesInSwitch is enabled

  #62295 commented on Aug 19, 2025 • 0 new comments

• `verbatimModuleSyntax` leaves empty curly brackets in the JS output

  #62239 commented on Aug 19, 2025 • 0 new comments

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

  #46135 commented on Aug 18, 2025 • 0 new comments

• Provide a way to type a fix-length tuple-like generator/iterator

  #42033 commented on Aug 18, 2025 • 0 new comments

• Hover documentation for typescript uses jsdoc rules and not tsdoc

  #61603 commented on Aug 18, 2025 • 0 new comments

• Error TS4020 or TS4023, working with mixins, base class has static symbol property, only when multiple files.

  #52644 commented on Aug 18, 2025 • 0 new comments

• 6.0 Deprecation Candidates

  #54500 commented on Aug 18, 2025 • 0 new comments

• Isolated Declarations in TS 5.5: State of the feature

  #58944 commented on Aug 18, 2025 • 0 new comments

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

  #31613 commented on Aug 18, 2025 • 0 new comments

• [Feature request]type level equal operator

  #48100 commented on Aug 17, 2025 • 0 new comments

• Regex-validated string types (feedback reset)

  #41160 commented on Aug 17, 2025 • 0 new comments

• TypeScript 5.9 Iteration Plan

  #61648 commented on Aug 17, 2025 • 0 new comments

• `transformTime` performance regression since 5.6.x

  #61406 commented on Aug 21, 2025 • 0 new comments

• JSDoc @type completion not working inside function argument

  #62281 commented on Aug 21, 2025 • 0 new comments

• `as const` breaks intra expression inference

  #62220 commented on Aug 21, 2025 • 0 new comments

• JSX autocompletes as `class={}` instead of `class=""`

  #62237 commented on Aug 21, 2025 • 0 new comments

• Missing error about inability to access conflicting private properties on generic types involving intersections

  #62294 commented on Aug 21, 2025 • 0 new comments

• Regression: Maximum call stack exceeded in TypeScript 5.8.3 with large type inference

  #62289 commented on Aug 21, 2025 • 0 new comments

• Nested Promise not automatically unwrapped

  #59111 commented on Aug 21, 2025 • 0 new comments

• Declaration file emits symbol property keys without importing them

  #62257 commented on Aug 21, 2025 • 0 new comments

• ERROR: Debug Failure. False expression: Script kind should match provided ScriptKind:8 and sourceFile.scriptKind: 3, !entry:false

  #62293 commented on Aug 21, 2025 • 0 new comments

• lib.dom.ts LockManager Incorrect

  #62231 commented on Aug 21, 2025 • 0 new comments

• Ghost error appearing after signature help in inferred signatures with rest parameter

  #62183 commented on Aug 21, 2025 • 0 new comments

• abstract type guard does not narrow when keyed with a unique symbol

  #62247 commented on Aug 21, 2025 • 0 new comments

• checker: Default import not flagged when target has no default export (moduleResolution=bundler)”

  #62241 commented on Aug 21, 2025 • 0 new comments

• MSBuild integration with ASP.NET Core

  #60538 commented on Aug 21, 2025 • 0 new comments

• Find All References does not work with module.exports in JavaScript

  #44832 commented on Aug 21, 2025 • 0 new comments

• please alias jsdoc doc comments to variable assignments

  #49798 commented on Aug 21, 2025 • 0 new comments

• Hoist types in declarations or copy JSDoc comments to all copies of type

  #54076 commented on Aug 21, 2025 • 0 new comments

• Regression in some error elaborations involving a target type mixing arrays with non-arrays

  #62234 commented on Aug 20, 2025 • 0 new comments

• One line import quick info hovers support increased verbosity without any additional information

  #62232 commented on Aug 20, 2025 • 0 new comments

• Typescript 5.9 can no longer derive this type, becomes 'any' instead

  #62256 commented on Aug 20, 2025 • 0 new comments

• ImportType attributes can include JS expressions

  #62179 commented on Aug 20, 2025 • 0 new comments

• Confusing missing property error in a circular situation

  #62180 commented on Aug 20, 2025 • 0 new comments