3 Pull requests merged by 2 people

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

  #61596 merged May 2, 2025

• check usage before declaration for decorators

  #50372 merged May 2, 2025

• arguments should not be allowed in class static block

  #48172 merged May 2, 2025

12 Pull requests opened by 11 people

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

  #61628 opened Apr 29, 2025

• Don't obtain apparent type of contextual types being optional type variables

  #61635 opened Apr 30, 2025

• Function initializers as properties

  #61636 opened May 1, 2025

• Make an error message related to the `PropertyDecorator` kinder

  #61637 opened May 1, 2025

• Add opt-in flag for projects that want stricter spread checking

  #61641 opened May 2, 2025

• Draft: Add codefix scaffold for undeclared private method

  #61643 opened May 2, 2025

• Add lib.esnext.sharedmemory

  #61646 opened May 2, 2025

• DOM Update 2025-05-02

  #61647 opened May 2, 2025

• docs(lib): add @throws JSDoc for BigInt methods and constructor

  #61653 opened May 4, 2025

• Fix unwanted constant comparisons potentially causing bugs

  #61655 opened May 4, 2025

• Avoid resolving source prop type when the target is `unknown`/`any`

  #61660 opened May 5, 2025

• Add configurable maximum hover length

  #61662 opened May 5, 2025

15 Issues closed by 6 people

• TypeScript: After moving file into new destination its extensions `declare module '../types' {` are not changing path of module being extending

  #61639 closed May 5, 2025

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

  #61629 closed May 5, 2025

• Bug: Predicate function does not narrow correctly

  #61652 closed May 4, 2025

• "used before its declaration" errors not reported when variable/enum/class is used as decorator parameter on class member

  #50349 closed May 2, 2025

• `rewriteRelativeImportExtensions` errors on relative import

  #61615 closed May 2, 2025

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

  #61623 closed May 2, 2025

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

  #61624 closed May 2, 2025

• [NewErrors] 5.9.0-dev.20250427 vs 5.8.3

  #61622 closed May 2, 2025

• `arguments` should not be allowed class static block

  #48152 closed May 2, 2025

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

  #61613 closed May 1, 2025

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

  #61621 closed May 1, 2025

• Inconsistency with default value export and default type export

  #61626 closed May 1, 2025

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

  #61627 closed May 1, 2025

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

  #61619 closed May 1, 2025

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

  #61618 closed Apr 29, 2025

19 Issues opened by 15 people

• Tsserver never picks up a new file

  #61663 opened May 6, 2025

• TypeScript doesn't reverse-infer generic constraints from discriminated unions

  #61661 opened May 5, 2025

• Support cyclical type inference of self-referential data structures, when subject to some assignability constraints

  #61659 opened May 4, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250504 vs 5.8.3

  #61658 opened May 4, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250504 vs 5.8.3

  #61657 opened May 4, 2025

• [NewErrors] 5.9.0-dev.20250504 vs 5.8.3

  #61656 opened May 4, 2025

• Unwanted constant comparisons potentially causing bugs

  #61654 opened May 4, 2025

• Support the `@private` JSDoc directive to exclude private APIs from emitted type declarations

  #61651 opened May 4, 2025

• Unexpected narrowing of optional fields via Object.entries

  #61650 opened May 3, 2025

• Cross-module inference issue: never-returning function doesn't prevent further type checking in async context

  #61649 opened May 3, 2025

• TypeScript 5.9 Iteration Plan

  #61648 opened May 2, 2025

• require(esm) 'module.exports' interop export name support

  #61645 opened May 2, 2025

• Invalid quick fix for class that's exported as a variable with `isolatedDeclarations`

  #61644 opened May 2, 2025

• Invalid quick fix for function returning `Promise<unknown>` with `isolatedDeclarations`

  #61642 opened May 2, 2025

• Add an option not to use implicit any when I create an empty container (for example [], new Set() or new Map())

  #61638 opened May 1, 2025

• Broken inference for generic classes passed to a generic function taking an optional class

  #61633 opened Apr 30, 2025

• typescript auto import includes from `node_modules`

  #61634 opened Apr 30, 2025

• Intellisense for import.meta.resolve()

  #61631 opened Apr 29, 2025

• "Extract..." refactorings not available on right side of addition/multiplication expression

  #61630 opened Apr 29, 2025

60 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.

• Suggestion: Allow ES6 export syntax in namespaces

  #39865 commented on Apr 29, 2025 • 0 new comments

• refactor: New file generates import from wrong module specifier

  #58897 commented on Apr 30, 2025 • 0 new comments

• moduleResolution Bundler and importModuleSpecifierEnding

  #60478 commented on Apr 30, 2025 • 0 new comments

• Module "..." cannot be named without a reference to "..." error when decl emitting references to nested modules

  #48212 commented on Apr 30, 2025 • 0 new comments

• Unable to access ServiceWorkerGlobalScope via `self.`

  #14877 commented on Apr 30, 2025 • 0 new comments

• Fix "isolatedDeclarations" QuickFix

  #59112 commented on May 1, 2025 • 0 new comments

• Improve error message for decorator type mismatches

  #4534 commented on May 1, 2025 • 0 new comments

• `import defer` Stage 3 proposal support

  #59391 commented on May 1, 2025 • 0 new comments

• Settings to prefer local import over external import v2

  #56676 commented on May 1, 2025 • 0 new comments

• Wrong import attribute typed as any, but should be typed as string

  #61469 commented on May 1, 2025 • 0 new comments

• Module resolution: NodeNext breaks typechecking

  #60561 commented on May 2, 2025 • 0 new comments

• JSDoc `@` in the code block is broken

  #61640 commented on May 2, 2025 • 0 new comments

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

  #61577 commented on May 2, 2025 • 0 new comments

• move to new file not working

  #61632 commented on May 2, 2025 • 0 new comments

• tsc --init update 2024

  #58420 commented on May 2, 2025 • 0 new comments

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

  #31613 commented on May 3, 2025 • 0 new comments

• Instantiation expressions don't filter signatures with non-matching constraints

  #51694 commented on May 4, 2025 • 0 new comments

• `@ts-nocheck` and `@ts-ignore` should also disable suggestions

  #47315 commented on May 4, 2025 • 0 new comments

• Generic values

  #17574 commented on May 5, 2025 • 0 new comments

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

  #11920 commented on May 5, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on May 5, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on May 5, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on May 5, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on May 5, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on May 5, 2025 • 0 new comments

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

  #33471 commented on May 5, 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 5, 2025 • 0 new comments

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

  #39114 commented on May 5, 2025 • 0 new comments

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

  #39650 commented on May 5, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on May 5, 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 5, 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 5, 2025 • 0 new comments

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

  #42905 commented on May 5, 2025 • 0 new comments

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

  #43943 commented on May 5, 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 5, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on May 5, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on May 5, 2025 • 0 new comments

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

  #52313 commented on May 5, 2025 • 0 new comments

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

  #53234 commented on May 5, 2025 • 0 new comments

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

  #57009 commented on May 5, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on May 5, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on May 5, 2025 • 0 new comments

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

  #57564 commented on May 5, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on May 5, 2025 • 0 new comments

• Suggest @ts-expect-error as Quick Fix

  #59934 commented on May 5, 2025 • 0 new comments

• ServiceWorkerRegistration.Update() should return Promise<ServiceWorkerRegistration>

  #31502 commented on May 6, 2025 • 0 new comments

• Implement partial type argument inference using the _ sigil

  #26349 commented on Apr 30, 2025 • 0 new comments

• Instantiate conditional types within contextual type instantiation when inference candidates are available

  #48838 commented on Apr 30, 2025 • 0 new comments

• Improve signature assignability for argument lists of different lengths

  #49218 commented on Apr 30, 2025 • 0 new comments

• Allow some per file compiler options

  #49886 commented on Apr 30, 2025 • 0 new comments

• Allow nonNullAssertions on possibly-uninitialized auto-typed let variables

  #52483 commented on May 2, 2025 • 0 new comments

• fix(53576): Don't remove indentations from JSDoc tag documentation

  #53631 commented on Apr 30, 2025 • 0 new comments

• Attempt to reduce types which are about to produce a complexity error

  #53739 commented on May 1, 2025 • 0 new comments

• Preserve type parameter constraint in emitted mapped types while preserving their distributivity

  #54759 commented on Apr 30, 2025 • 0 new comments

• Fix(15506) - Disallow non-any/number/string operands on comparisons

  #56666 commented on Apr 30, 2025 • 0 new comments

• Fixed single signature type instantiations leaking between calls with different mappers

  #59972 commented on Apr 30, 2025 • 0 new comments

• Add support for `import defer` proposal

  #60757 commented on May 1, 2025 • 0 new comments

• feat: add Error.isError() to ESNext lib

  #60788 commented on May 2, 2025 • 0 new comments

• Cache mapper instantiations

  #61505 commented on May 2, 2025 • 0 new comments

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

  #61625 commented on May 5, 2025 • 0 new comments