3 Pull requests merged by 3 people

• fix(61258): Renaming namespace with const enum doesn't update enum references

  #61263 merged Apr 24, 2025

• Add the .getNonPrimitiveType() method to the TypeChecker

  #61562 merged Apr 24, 2025

• Fix #61098

  #61113 merged Apr 24, 2025

3 Pull requests opened by 3 people

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

  #61608 opened Apr 22, 2025

• Bump github/codeql-action from 3.28.15 to 3.28.16 in the github-actions group

  #61625 opened Apr 28, 2025

• chore: `string` type also allows as args in Intl.NumberFormat.format

  #61628 opened Apr 29, 2025

15 Issues closed by 8 people

• Proposal: Add Overloads to `Array.prototype.includes` and `ReadonlyArray.prototype.includes` for Improved Type Safety and Usability

  #61618 closed Apr 29, 2025

• JSX.Element and function component return type assignability

  #61620 closed Apr 28, 2025

• JSDoc type parameter `{object|boolean}`: error in object properties

  #61612 closed Apr 28, 2025

• Inconsistent inferred type for extended unions.

  #61616 closed Apr 28, 2025

• Don't allow applying the ! operator to uncalled functions

  #61607 closed Apr 27, 2025

• Intellisense should show internals of an interface declaration on hover

  #38040 closed Apr 25, 2025

• Add caching to improve performance of rebuilds in --build mode

  #60701 closed Apr 25, 2025

• TypeScript fails to infer generic key `K` when constrained by `T[K]`'s type and `T` is inferred from `this`

  #61611 closed Apr 25, 2025

• Renaming namespace with const enum doesn't update enum references

  #61258 closed Apr 24, 2025

• Add `.getObjectType()` to the `TypeChecker`

  #61517 closed Apr 24, 2025

• Type containing templated, branded string is not assignable to itself

  #61098 closed Apr 24, 2025

• "Debug Failure. False expression." when using default export from js file

  #60692 closed Apr 24, 2025

• Docs for `--rewriteRelativeImportExtensions` literally say "Does something"

  #61609 closed Apr 24, 2025

• Custom type guard fails for supertype in union type

  #61597 closed Apr 23, 2025

• TS module not found until server is restarted

  #59129 closed Apr 22, 2025

15 Issues opened by 13 people

• string also allows as args in Intl.NumberFormat.format

  #61629 opened Apr 29, 2025

• incomplete between parameter type annotation and default value, but no error is reported.

  #61627 opened Apr 28, 2025

• Inconsistency with default value export and default type export

  #61626 opened Apr 28, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250427 vs 5.8.3

  #61624 opened Apr 27, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250427 vs 5.8.3

  #61623 opened Apr 27, 2025

• [NewErrors] 5.9.0-dev.20250427 vs 5.8.3

  #61622 opened Apr 27, 2025

• The inference when using the new keyword doesn't work as expected.

  #61621 opened Apr 27, 2025

• Argument of type 'object & Record<"property", unknown>' is not assignable to parameter of type 'Interface'.

  #61619 opened Apr 26, 2025

• `rewriteRelativeImportExtensions` errors on relative import

  #61615 opened Apr 25, 2025

• Prefer local auto-imports over those from external modules

  #61617 opened Apr 25, 2025

• Add option to always inline .json type import

  #61614 opened Apr 25, 2025

• Allow .ts extension when importing from a private mapping?

  #61613 opened Apr 25, 2025

• TypeScript fails to find declaration file of a peer project after it rebuilds in a monorepo

  #61610 opened Apr 23, 2025

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

  #61606 opened Apr 22, 2025

• Exclude specific exported identifiers from auto import suggestions

  #61605 opened Apr 22, 2025

58 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.

• String case change methods should return intrinsic string manipulation types

  #44268 commented on Apr 22, 2025 • 0 new comments

• MSBuild integration with ASP.NET Core

  #60538 commented on Apr 23, 2025 • 0 new comments

• Index signature is assignable to weak type whose properties don't match the signature type

  #27144 commented on Apr 23, 2025 • 0 new comments

• Bring back typedef property expansion

  #25784 commented on Apr 24, 2025 • 0 new comments

• TypeScript 5.8 Iteration Plan

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

• Support `satisfies` operator on functions

  #51556 commented on Apr 24, 2025 • 0 new comments

• Handle union type of void and Promise<void> in return types

  #43921 commented on Apr 24, 2025 • 0 new comments

• Add CookieStore API types

  #61604 commented on Apr 24, 2025 • 0 new comments

• Hover documentation for typescript uses jsdoc rules and not tsdoc

  #61603 commented on Apr 24, 2025 • 0 new comments

• Type narrowing in one case statement does not propagate to the next case

  #56361 commented on Apr 25, 2025 • 0 new comments

• Switch statement over a union of literals is not exhaustive when checking against enum members

  #53736 commented on Apr 25, 2025 • 0 new comments

• Unexpected "'Type' is declared but its value is never read." error with jsdoc @import syntax

  #60908 commented on Apr 25, 2025 • 0 new comments

• TypeScript code suggestions include inaccessible private fields from base classes

  #61462 commented on Apr 25, 2025 • 0 new comments

• References from dynamic imports not recognized when indirectly exporting variable

  #61366 commented on Apr 25, 2025 • 0 new comments

• Show deprecated strikethrough for JSX properties when union type

  #57584 commented on Apr 25, 2025 • 0 new comments

• JSDocs don't support properties on functions

  #56615 commented on Apr 26, 2025 • 0 new comments

• TypeScript complains about overwriting .d.ts files that are potentially known outputs

  #16749 commented on Apr 26, 2025 • 0 new comments

• Typescript can't infer types when using Proxy

  #20846 commented on Apr 26, 2025 • 0 new comments

• Allow trailing commas in type arguments

  #21984 commented on Apr 26, 2025 • 0 new comments

• Allow bigint as an index type because number is allowed too

  #46395 commented on Apr 26, 2025 • 0 new comments

• Inconsistent behaviour of `-?`

  #59948 commented on Apr 27, 2025 • 0 new comments

• Add Temporal (Stage 3) types

  #60164 commented on Apr 28, 2025 • 0 new comments

• Assigning window.location after 5.8.2 upgrade fails

  #61335 commented on Apr 28, 2025 • 0 new comments

• Strict null checks for Map members

  #9619 commented on Apr 28, 2025 • 0 new comments

• MsBuild: Target `TypeScriptDeleteOutputFromOtherConfigs` can grab tsc.out from other Configuration

  #50428 commented on Apr 28, 2025 • 0 new comments

• Confusing error message when there is an accidental circular reference in monorepo

  #61577 commented on Apr 28, 2025 • 0 new comments

• refactor: New file generates import from wrong module specifier

  #58897 commented on Apr 29, 2025 • 0 new comments

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

  #11920 commented on Apr 29, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Apr 29, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Apr 29, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Apr 29, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Apr 29, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Apr 29, 2025 • 0 new comments

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

  #33471 commented on Apr 29, 2025 • 0 new comments

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

  #38388 commented on Apr 29, 2025 • 0 new comments

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

  #39114 commented on Apr 29, 2025 • 0 new comments

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

  #39650 commented on Apr 29, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Apr 29, 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 Apr 29, 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 Apr 29, 2025 • 0 new comments

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

  #42905 commented on Apr 29, 2025 • 0 new comments

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

  #43943 commented on Apr 29, 2025 • 0 new comments

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

  #46791 commented on Apr 29, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Apr 29, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Apr 29, 2025 • 0 new comments

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

  #52313 commented on Apr 29, 2025 • 0 new comments

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

  #53234 commented on Apr 29, 2025 • 0 new comments

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

  #57009 commented on Apr 29, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Apr 29, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Apr 29, 2025 • 0 new comments

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

  #57564 commented on Apr 29, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Apr 29, 2025 • 0 new comments

• [Experiment] Handle package.json watch in tsc --build

  #48889 commented on Apr 28, 2025 • 0 new comments

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

  #59957 commented on Apr 26, 2025 • 0 new comments

• fix `Intl.Segments#containing` return value type

  #61236 commented on Apr 28, 2025 • 0 new comments

• fix(57026): Renaming on declaration whose name is a String Literal

  #61353 commented on Apr 25, 2025 • 0 new comments

• Cache mapper instantiations

  #61505 commented on Apr 24, 2025 • 0 new comments

• Fix #61429: Fast arithmetic type check for type-parameters upper-bounded by `bigint` fixed

  #61571 commented on Apr 27, 2025 • 0 new comments