2 Pull requests merged by 2 people

• Bump the github-actions group with 2 updates

  #62299 merged Aug 18, 2025

• Update deps

  #62285 merged Aug 14, 2025

3 Pull requests opened by 2 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

17 Issues closed by 6 people

• 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

• Intersection of Pick and Omit does not restore the original type

  #62292 closed Aug 17, 2025

• وارد کردن دستی توکن ها

  #62291 closed Aug 17, 2025

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

  #62250 closed Aug 15, 2025

• [ServerErrors][TypeScript] 6.0.0-dev.20250803 vs 5.9.2

  #62187 closed Aug 15, 2025

• [NewErrors] 6.0.0-dev.20250810 vs 5.9.2

  #62249 closed Aug 15, 2025

• [ServerErrors][JavaScript] 6.0.0-dev.20250803 vs 5.9.2

  #62186 closed Aug 15, 2025

• [NewErrors] 6.0.0-dev.20250803 vs 5.9.2

  #62185 closed Aug 15, 2025

15 Issues opened by 14 people

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

  #62312 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

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

  #62302 opened Aug 18, 2025

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

  #62301 opened Aug 18, 2025

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

  #62298 opened Aug 17, 2025

• [NewErrors] 6.0.0-dev.20250817 vs 5.9.2

  #62296 opened Aug 17, 2025

• Allow explicit fallthrough when noFallthroughCasesInSwitch is enabled

  #62295 opened Aug 17, 2025

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

  #62294 opened Aug 17, 2025

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

  #62293 opened Aug 17, 2025

• Stronger existence guarantees for `declare`

  #62290 opened Aug 15, 2025

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

  #62289 opened Aug 15, 2025

75 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.

• Error handling test

  #62219 commented on Aug 15, 2025 • 2 new comments

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

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

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

  #43943 commented on Aug 21, 2025 • 0 new comments

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

  #42905 commented on Aug 21, 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 21, 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 21, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Aug 21, 2025 • 0 new comments

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

  #39650 commented on Aug 21, 2025 • 0 new comments

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

  #39114 commented on Aug 21, 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 21, 2025 • 0 new comments

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

  #33471 commented on Aug 21, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Aug 21, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Aug 21, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Aug 21, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Aug 21, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Aug 21, 2025 • 0 new comments

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

  #11920 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

• Circular reference error even when overridden with "as"

  #62223 commented on Aug 21, 2025 • 0 new comments

• keyword to force calling the super on any method

  #21388 commented on Aug 19, 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

• Derive disposability checks from known symbols rather than global interfaces

  #62122 commented on Aug 15, 2025 • 0 new comments

• Combine inferences from distributive conditional types

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

• Defer checking subexpressions of binary expressions with known boolean result type

  #60865 commented on Aug 14, 2025 • 0 new comments

• Add source mappings for serialized properties with available declaration

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

• Issues around casting tuples to arrays

  #62177 commented on Aug 21, 2025 • 0 new comments

• Type inference fails when type narrowing occurs within a loop

  #62279 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

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Aug 21, 2025 • 0 new comments

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

  #57564 commented on Aug 21, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Aug 21, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Aug 21, 2025 • 0 new comments

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

  #57009 commented on Aug 21, 2025 • 0 new comments

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

  #53234 commented on Aug 21, 2025 • 0 new comments

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

  #52313 commented on Aug 21, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Aug 21, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Aug 21, 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 21, 2025 • 0 new comments

• Add readonly property detection in conditional types

  #62280 commented on Aug 19, 2025 • 0 new comments

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

  #62226 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

• Existential type?

  #14466 commented on Aug 17, 2025 • 0 new comments

• Ability to extend compilerOptions's paths config

  #44589 commented on Aug 15, 2025 • 0 new comments

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

  #39354 commented on Aug 15, 2025 • 0 new comments

• #AvoidTheVoid Allow users to avoid the `void` type.

  #42709 commented on Aug 14, 2025 • 0 new comments

• [Discussion] Better Way to Declare Globals in JavaScript files

  #15626 commented on Aug 14, 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

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

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

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

  #62230 commented on Aug 20, 2025 • 0 new comments

• Revert ts5.9 changes for Uint8Array

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

• Return type incorrectly narrowed to intersection instead of union

  #62217 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

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

  #62222 commented on Aug 20, 2025 • 0 new comments

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

  #62254 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

• `transformTime` performance regression since 5.6.x

  #61406 commented on Aug 20, 2025 • 0 new comments

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

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

• confusingly statement

  #62276 commented on Aug 19, 2025 • 0 new comments