4 Pull requests merged by 4 people

• Bump the github-actions group across 1 directory with 3 updates

  #61601 merged Apr 21, 2025

• Deemphasize old JSX transform

  #61586 merged Apr 17, 2025

• Fix crash when serializing default export in error

  #61582 merged Apr 16, 2025

• Expandable hover

  #61492 merged Apr 15, 2025

4 Pull requests opened by 4 people

• Improve `.origin` preservation in `getNarrowedTypeWorker`

  #61589 opened Apr 17, 2025

• fix: private field in class expression emits invalid dts

  #61590 opened Apr 17, 2025

• Don't latebind global JS property assignments

  #61593 opened Apr 18, 2025

• docs(lib): add @throws JSDoc for JSON methods

  #61596 opened Apr 20, 2025

25 Issues closed by 11 people

• Inconsistent behaviour of `never` within a mapped type

  #61602 closed Apr 22, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250420 vs 5.8.3

  #61600 closed Apr 21, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250420 vs 5.8.3

  #61599 closed Apr 21, 2025

• [NewErrors] 5.9.0-dev.20250420 vs 5.8.3

  #61598 closed Apr 21, 2025

• Failed to resolve plugin when using pnpm custom virtual-store-dir

  #61584 closed Apr 21, 2025

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

  #61577 closed Apr 21, 2025

• Proposal: Add indexof operator to access private members for testing

  #61595 closed Apr 20, 2025

• tsserver doesn't work under git-bash on windows

  #61587 closed Apr 20, 2025

• Typescript type checker gets stuck

  #46227 closed Apr 19, 2025

• Provide a Warning when tslib is needed, but not declared in the projects package.json as a peer dependency.

  #61569 closed Apr 19, 2025

• Need a new Version of NodeNext? Or remove types from @types/node?

  #61572 closed Apr 19, 2025

• namespaces don't respect `const`s

  #61568 closed Apr 19, 2025

• Ternary branches not checked

  #61578 closed Apr 19, 2025

• AllowSharedBufferSource definition is incorrect

  #61480 closed Apr 18, 2025

• never type as argument in conditional sub-type position does not evaluate conditional

  #61594 closed Apr 18, 2025

• Using `var` in limited contexts to avoid runtime TDZ checks

  #52924 closed Apr 18, 2025

• `--jsx react` should be deemphasized

  #61585 closed Apr 17, 2025

• jsdoc: Optional function parameters don't have optional type within function definition

  #61579 closed Apr 17, 2025

• Huge jump in tsc memory usage from 5.5.4 -> 5.6.2

  #60166 closed Apr 16, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250413 vs 5.8.3

  #61575 closed Apr 16, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250413 vs 5.8.3

  #61574 closed Apr 16, 2025

• [NewErrors] 5.9.0-dev.20250413 vs 5.8.3

  #61573 closed Apr 16, 2025

• Support importing types from a `.mts` file from within a CommonJS file.

  #58195 closed Apr 16, 2025

• Return type of exported function has or is using name X from external module Y but cannot be named.

  #61567 closed Apr 16, 2025

• Support Expandable Quick Info/Hover Verbosity

  #59029 closed Apr 15, 2025

10 Issues opened by 10 people

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

  #61607 opened Apr 22, 2025

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

  #61606 opened Apr 22, 2025

• Exclude specific imports from auto import suggestions

  #61605 opened Apr 22, 2025

• Add CookieStore API types

  #61604 opened Apr 22, 2025

• Custom type guard fails for supertype in union type

  #61597 opened Apr 20, 2025

• Hover documentation for typescript uses jsdoc rules and not tsdoc

  #61603 opened Apr 19, 2025

• Support auto-completion for TSDoc

  #61592 opened Apr 18, 2025

• TS4055 when generating declaration for return type that uses type of paramter for protected methods

  #61591 opened Apr 18, 2025

• source.organizeImports affects export object

  #61588 opened Apr 16, 2025

• Internal error in tsc: "TypeError: Cannot read properties of undefined (reading 'flags')"

  #61583 opened Apr 16, 2025

48 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.

• Implement(60881): Added detailed diagnostic for parent to child assignment

  #61145 commented on Apr 18, 2025 • 4 new comments

• `arguments` should not be allowed in class static block

  #48172 commented on Apr 18, 2025 • 2 new comments

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

  #61571 commented on Apr 18, 2025 • 1 new comment

• Improve release publisher pipeline

  #61551 commented on Apr 21, 2025 • 1 new comment

• Add types for `String.{matchAll,replaceAll}` with a well known symbol

  #61449 commented on Apr 21, 2025 • 1 new comment

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

  #39650 commented on Apr 22, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Apr 22, 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 22, 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 22, 2025 • 0 new comments

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

  #42905 commented on Apr 22, 2025 • 0 new comments

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

  #43943 commented on Apr 22, 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 22, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Apr 22, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Apr 22, 2025 • 0 new comments

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

  #52313 commented on Apr 22, 2025 • 0 new comments

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

  #53234 commented on Apr 22, 2025 • 0 new comments

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

  #57009 commented on Apr 22, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Apr 22, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Apr 22, 2025 • 0 new comments

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

  #57564 commented on Apr 22, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Apr 22, 2025 • 0 new comments

• [WIP] Support condition always true in prefix unary expression

  #60068 commented on Apr 21, 2025 • 0 new comments

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

  #61353 commented on Apr 22, 2025 • 0 new comments

• Cache mapper instantiations

  #61505 commented on Apr 21, 2025 • 0 new comments

• Add the strictMathChecks option to allow for less complex code with math operations

  #45543 commented on Apr 15, 2025 • 0 new comments

• Aliases are lost when conditionals are applied

  #61581 commented on Apr 16, 2025 • 0 new comments

• Set as executable files that are intended to be binaries

  #37583 commented on Apr 16, 2025 • 0 new comments

• Differing user-defined type guard and 'typeof' type guard behaviour when narrowing 'any'

  #6015 commented on Apr 17, 2025 • 0 new comments

• TypeScript file watcher holds onto folders and causes EPERM

  #54087 commented on Apr 17, 2025 • 0 new comments

• Auto-import priority rules

  #51155 commented on Apr 18, 2025 • 0 new comments

• TypeScript slow project load times for large projects on MacOS

  #60832 commented on Apr 18, 2025 • 0 new comments

• `transformTime` performance regression since 5.6.x

  #61406 commented on Apr 18, 2025 • 0 new comments

• Force Override Declarations Types

  #36146 commented on Apr 18, 2025 • 0 new comments

• Support to method decorator that change the method signature

  #49229 commented on Apr 18, 2025 • 0 new comments

• Exact Types

  #12936 commented on Apr 20, 2025 • 0 new comments

• Expect to use @throws in lib/*.d.ts to mark which methods may throw err

  #43528 commented on Apr 20, 2025 • 0 new comments

• tsc with allowJs reports TS9005 error for nested anonymous constructor functions

  #57523 commented on Apr 20, 2025 • 0 new comments

• `Intl.DurationFormat` missing from library definitions

  #60608 commented on Apr 20, 2025 • 0 new comments

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

  #60487 commented on Apr 21, 2025 • 0 new comments

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

  #11920 commented on Apr 22, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Apr 22, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Apr 22, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Apr 22, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Apr 22, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Apr 22, 2025 • 0 new comments

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

  #33471 commented on Apr 22, 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 22, 2025 • 0 new comments

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

  #39114 commented on Apr 22, 2025 • 0 new comments