2 Pull requests merged by 2 people

• Fix getResolvePackageJsonImports utility

  #61707 merged May 16, 2025

• Stop reassigning .valueDeclaration to avoid replacing earlier declarations with late ones

  #60857 merged May 15, 2025

4 Pull requests opened by 4 people

• Add type definitions for `Uint8Array` to/from base64 methods

  #61696 opened May 13, 2025

• Improve `@throws {@link CustomError}` handling

  #61722 opened May 18, 2025

• Bump the github-actions group across 1 directory with 2 updates

  #61726 opened May 19, 2025

• Handle lock file 3 version when caching the typings ensuring we can reuse already installed packages

  #61730 opened May 19, 2025

25 Issues closed by 9 people

• [ServerErrors][TypeScript] 5.9.0-dev.20250518 vs 5.8.3

  #61725 closed May 19, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250518 vs 5.8.3

  #61724 closed May 19, 2025

• [NewErrors] 5.9.0-dev.20250518 vs 5.8.3

  #61723 closed May 19, 2025

• Boolean type is not inferred correctly when a variable is declared with `let`

  #61727 closed May 19, 2025

• Typescript fail to parse JSX syntax correctly

  #61720 closed May 19, 2025

• Exported types in an ESM namespace are not "nameable" (have repro)

  #61700 closed May 19, 2025

• `jsconfig.*.json` don't have `"allowJs": true` by default

  #61704 closed May 19, 2025

• False negative on exhaustive type guard on multilevel union

  #61708 closed May 19, 2025

• `click` event's interface should be changed to `PointerEvent`

  #60746 closed May 18, 2025

• TypeChecker: Symbol.getDeclarations() returns undefined declarations when used with complex generic types

  #61697 closed May 18, 2025

• Strange vscode typescript intellisense bug.

  #61705 closed May 18, 2025

• Type narrow not worked with this union type.

  #61701 closed May 18, 2025

• type of FetchEvent.handled shold be Promise<undefined> not Promise<void>;

  #61703 closed May 18, 2025

• Type assertion of readonly array property doesn't work only with a class type (static property).

  #61719 closed May 17, 2025

• File '/path/hsciiwapp/node_modules/hsciistr/dist/hsciistr.d.ts' is not a module.ts(2306)

  #61693 closed May 17, 2025

• `tsserver` diagnostic discrepancy on identifier completion

  #60606 closed May 16, 2025

• Mangling interface bindings to indicate identifier type

  #61710 closed May 16, 2025

• JSDoc property modifiers on computed properties

  #60590 closed May 15, 2025

• How to get the name of the codefix from getSupportedCodeFixes?

  #61679 closed May 15, 2025

• Recursive Type Field Validation + Suggest, compile, fail over, Improve Transform of Circular Types Generic type hint Circular<type>

  #61685 closed May 15, 2025

• Generic constraint `extends` is confusing

  #61694 closed May 15, 2025

• Circular Generic Type Transforms to New mutation Circular Generic Types

  #61686 closed May 15, 2025

• Problem of losing "this" context in class method when casting to arrow function

  #61684 closed May 15, 2025

• Readonly methods and readonly types

  #61690 closed May 15, 2025

• interface&type inference

  #61699 closed May 14, 2025

16 Issues opened by 14 people

• Overriding type of union works as declared type but not as generic type

  #61729 opened May 19, 2025

• Poor quick info due to erroneously deferring `keyof T` since #51621

  #61728 opened May 19, 2025

• Mixing base class defeats circularity protection

  #61721 opened May 18, 2025

• Emitted declarations for JS file do not import a class if it's re-exported

  #61718 opened May 17, 2025

• `tsc --build --watch` produces stray `.js`/`.js.map` files when adding a file to upstream project

  #61717 opened May 17, 2025

• Double initializing a `readonly` field should not be allowed

  #61716 opened May 17, 2025

• Function definition parameter type inference

  #61715 opened May 16, 2025

• `using` transform throws when a for body binding shadows the for head binding

  #61714 opened May 16, 2025

• Missing Intl.Locale.prototype.getWeekInfo()

  #61713 opened May 16, 2025

• Add option to remove "move to new file" quick fix

  #61712 opened May 16, 2025

• Resolution order dependent circular heritage

  #61711 opened May 16, 2025

• Monorepo workspace packages in devDependencies are not considered for auto-imports

  #61709 opened May 16, 2025

• `Object.groupBy` should not return `Partial<Record<string, T>>` or `Partial<Record<number, T>>`

  #61706 opened May 15, 2025

• TS Server Plugin rename supoort transform user input

  #61702 opened May 15, 2025

• Internal caching of Iterable types skips type checks for optional Arrays, only emits error on first encountered instance of TS error 2488

  #61698 opened May 13, 2025

• base64/hex methods missing from `Uint8Array`

  #61695 opened May 12, 2025

61 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.

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

  #61236 commented on May 15, 2025 • 1 new comment

• type destructuring

  #35396 commented on May 13, 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 May 19, 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 May 19, 2025 • 0 new comments

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

  #42905 commented on May 19, 2025 • 0 new comments

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

  #43943 commented on May 19, 2025 • 0 new comments

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

  #46791 commented on May 19, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on May 19, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on May 19, 2025 • 0 new comments

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

  #52313 commented on May 19, 2025 • 0 new comments

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

  #53234 commented on May 19, 2025 • 0 new comments

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

  #57009 commented on May 19, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on May 19, 2025 • 0 new comments

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

  #57564 commented on May 19, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on May 19, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on May 19, 2025 • 0 new comments

• Add option to include files in type checking, but not compiling

  #54410 commented on May 19, 2025 • 0 new comments

• Generic TypedArray constructors have only one overload

  #61680 commented on May 19, 2025 • 0 new comments

• This JSX tag's 'children' prop expects type 'string' which requires multiple children, but only a single child was provided

  #61692 commented on May 19, 2025 • 0 new comments

• Native support for PnP

  #35206 commented on May 14, 2025 • 0 new comments

• Avoid binding readonly properties as special properties on a function symbol

  #49146 commented on May 14, 2025 • 0 new comments

• Fix(51162): TS Server fatal error

  #52372 commented on May 13, 2025 • 0 new comments

• fix issue 53775, do not always narrow to property signature

  #54110 commented on May 13, 2025 • 0 new comments

• Replace errorType return with Debug fail in checkExpressionWorker

  #54117 commented on May 13, 2025 • 0 new comments

• Add nested call and new expressions as potential intra expression inference sites

  #54183 commented on May 19, 2025 • 0 new comments

• Mark all unreachable executable statements in cases and source files

  #55588 commented on May 15, 2025 • 0 new comments

• [wip] Shared resolutions in tsserver

  #55968 commented on May 17, 2025 • 0 new comments

• [wip] Type acquisition and module resolution updates

  #56074 commented on May 16, 2025 • 0 new comments

• Add source mappings for serialized properties with available declaration

  #60005 commented on May 14, 2025 • 0 new comments

• Add support for `import defer` proposal

  #60757 commented on May 15, 2025 • 0 new comments

• Compare optional property flag when comparing against discriminant properties under `exactOptionalPropertyTypes`

  #61682 commented on May 19, 2025 • 0 new comments

• Disable type checking for node_modules entirely

  #40426 commented on May 13, 2025 • 0 new comments

• source.organizeImports affects export object

  #61588 commented on May 13, 2025 • 0 new comments

• "The inferred type of X cannot be named without a reference to Y" (TS2742) still happens, when working with npm link to link packages manually

  #58914 commented on May 13, 2025 • 0 new comments

• Decouple jsx element type from jsx factory return type and sfc return type

  #21699 commented on May 14, 2025 • 0 new comments

• `asserts this is T` does not narrow type of `this`

  #60140 commented on May 14, 2025 • 0 new comments

• VS Code doesn't show autocomplete for Mongoose MongoDB operators (like $elemMatch, $match,$gte and ...) in JavaScript, while WebStorm does

  #61666 commented on May 14, 2025 • 0 new comments

• A contextually-typed signature coming from correlated union can't be assigned back to source of its contextual type

  #61676 commented on May 14, 2025 • 0 new comments

• Alias for TypeScript declaration emitting

  #30952 commented on May 15, 2025 • 0 new comments

• [Suggestion] a "const mode" where `as const` is by default for literals

  #51930 commented on May 15, 2025 • 0 new comments

• TypeScript 5.9 Iteration Plan

  #61648 commented on May 15, 2025 • 0 new comments

• MSBuild integration with ASP.NET Core

  #60538 commented on May 15, 2025 • 0 new comments

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

  #56749 commented on May 16, 2025 • 0 new comments

• C++-style `const` modifier on class members

  #58236 commented on May 16, 2025 • 0 new comments

• VSCode auto-import ignores typescript.preferences.importModuleSpecifierEnding when using a path from the package.json imports

  #60423 commented on May 17, 2025 • 0 new comments

• Excessive stack depth comparing types with TS 3.2

  #29112 commented on May 17, 2025 • 0 new comments

• Supply label names in tuple types using type-level strings

  #56093 commented on May 18, 2025 • 0 new comments

• A mixin class must have a constructor with a single rest parameter of type 'any[]'.

  #37142 commented on May 18, 2025 • 0 new comments

• Support `proposal-json-parse-with-source` (`JSON.rawJSON()`, `JSON.isRawJSON()`, `context` parameter of `reviver` function, etc...)

  #61330 commented on May 19, 2025 • 0 new comments

• Numeric Range Types (Feature Update)

  #54925 commented on May 19, 2025 • 0 new comments

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

  #11920 commented on May 19, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on May 19, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on May 19, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on May 19, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on May 19, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on May 19, 2025 • 0 new comments

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

  #33471 commented on May 19, 2025 • 0 new comments

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

  #38388 commented on May 19, 2025 • 0 new comments

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

  #39114 commented on May 19, 2025 • 0 new comments

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

  #39650 commented on May 19, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on May 19, 2025 • 0 new comments