1 Pull request merged by 1 person

• Fix serialization of accessor types in declaration files.

  #61392 merged Mar 14, 2025

7 Pull requests opened by 6 people

• Improve narrowing by `in` operator under `noUncheckedIndexedAccess` for variable properties

  #61393 opened Mar 11, 2025

• Sort unions without using type IDs

  #61399 opened Mar 11, 2025

• Fix typos

  #61404 opened Mar 12, 2025

• Implement erasable Enum Annotations

  #61414 opened Mar 13, 2025

• Sort symbol members

  #61420 opened Mar 14, 2025

• 🤖 Pick PR #61392 (Fix serialization of accessor types...) into release-5.8

  #61423 opened Mar 14, 2025

• Fix to aggressive indentation for ternary operator #3676

  #61430 opened Mar 15, 2025

21 Issues closed by 15 people

• dynamic import from module=none of an module=es2022 via barrel reemits it as commonjs

  #61316 closed Mar 17, 2025

• Omit Type

  #61408 closed Mar 17, 2025

• Array.isArray( ) with readonly []

  #61381 closed Mar 17, 2025

• CFA does not consider pass-by-reference to invalidate assumptions

  #61416 closed Mar 16, 2025

• TC39 Accessor Decorators unable to use `declare`

  #61418 closed Mar 14, 2025

• Still only the last overloaded signature is picked when passing an overloaded function to Array.map

  #61398 closed Mar 14, 2025

• Unresolved generic type arguments end up in type declarations since 5.7.2

  #61338 closed Mar 14, 2025

• Unbound type parameter in declaration files for accessors with divergent types.

  #61391 closed Mar 14, 2025

• Unreachable code breaks subsequent CFA

  #61419 closed Mar 14, 2025

• Inferred types for named capture groups in RegExp

  #61413 closed Mar 13, 2025

• `ReadableStreamGenericReader` is incompatible with @types/node

  #61390 closed Mar 13, 2025

• Api to Copilot

  #61412 closed Mar 13, 2025

• Array access possibly undefined with noUncheckedIndexedAccess despite findIndex

  #61388 closed Mar 13, 2025

• Unexpected "property is not assignable to type 'undefined'" on dynamic assignment

  #61409 closed Mar 12, 2025

• Mistake in the docs

  #57005 closed Mar 12, 2025

• Refactor `getTypeOfSymbol` for Improved Readability and Maintainability

  #61401 closed Mar 12, 2025

• When subclassing incorrectly, the compiler error suggests changing base class rather than the derived one

  #61407 closed Mar 12, 2025

• How should we interpret the compatibility between optional-never objects and normal objects?

  #61396 closed Mar 11, 2025

• A minimal custom transformer plugin proposal

  #54276 closed Mar 11, 2025

• Incorrect Type Inference for Array Properties in Recursive Type Definitions

  #61394 closed Mar 11, 2025

• Allow Type Extraction and/or Access from `#` Private Fields and Methods in TypeScript Classes

  #61397 closed Mar 11, 2025

25 Issues opened by 23 people

• Allow `import.meta.url` when `module` is `node16` or `node18`

  #61441 opened Mar 17, 2025

• ts will try to compile import files from a folder without reference or include

  #61440 opened Mar 17, 2025

• I triggered the Debug assertion `Revert #54442 and add a testcase with whatever triggered this` when running with `--diagnostics`

  #61438 opened Mar 17, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250316 vs 5.8.2

  #61437 opened Mar 16, 2025

• Type Conversion Error with Empty and Non-Empty Generic Types in Record Mapping

  #61436 opened Mar 16, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250316 vs 5.8.2

  #61435 opened Mar 16, 2025

• `T?` shortcut for `T | undefined`

  #61434 opened Mar 16, 2025

• Support fuzzy search for "Go to Symbol in Workspace" for Javascript/Typescript

  #61439 opened Mar 16, 2025

• `{@link Class.name}` resolves wrongly to `Function.name`

  #61433 opened Mar 16, 2025

• [NewErrors] 5.9.0-dev.20250316 vs 5.8.2

  #61432 opened Mar 16, 2025

• Strange error message when accessing undefined property of an enum

  #61431 opened Mar 16, 2025

• Arithmetic operations on type-parameters subtyping `bigint` are incorrectly inferred to have type `number`

  #61429 opened Mar 15, 2025

• Iteration Plan for 5.9?

  #61428 opened Mar 15, 2025

• Provide a core types Type (result of typeof)

  #61427 opened Mar 15, 2025

• Intellisense: deprioritise native function methods

  #61426 opened Mar 15, 2025

• Class implementing interface implicit types

  #61425 opened Mar 14, 2025

• Potentially-`undefined` value not flagged when destructuring union of empty tuple and array

  #61424 opened Mar 14, 2025

• Typescript compiler hangs indefinitely

  #61422 opened Mar 14, 2025

• Using intersection types breaks type inference for function types

  #61417 opened Mar 13, 2025

• Allow tuple labels passed to `satisfies` to participate in type inference

  #61415 opened Mar 13, 2025

• Missing compiler error (or emit bug) in another isolatedModules + emitDecoratorMetadata use case

  #61411 opened Mar 13, 2025

• A flag to replace removed syntax with blank space

  #61410 opened Mar 12, 2025

• `transformTime` performance regression since 5.6.x

  #61406 opened Mar 12, 2025

• Unreliably report for unused local variable in the editor

  #61403 opened Mar 12, 2025

• require() is generated in JS although there's no runtime code

  #61395 opened Mar 11, 2025

74 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(60908): Unexpected "'Type' is declared but its value is never read." error with jsdoc @import syntax

  #60921 commented on Mar 17, 2025 • 3 new comments

• support quick info and go to definition on mapped keys

  #61061 commented on Mar 12, 2025 • 1 new comment

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

  #61263 commented on Mar 17, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Mar 17, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Mar 17, 2025 • 0 new comments

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

  #46791 commented on Mar 17, 2025 • 0 new comments

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

  #43943 commented on Mar 17, 2025 • 0 new comments

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

  #42905 commented on Mar 17, 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 Mar 17, 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 Mar 17, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Mar 17, 2025 • 0 new comments

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

  #39650 commented on Mar 17, 2025 • 0 new comments

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

  #39114 commented on Mar 17, 2025 • 0 new comments

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

  #38388 commented on Mar 17, 2025 • 0 new comments

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

  #33471 commented on Mar 17, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Mar 17, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Mar 17, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Mar 17, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Mar 17, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Mar 17, 2025 • 0 new comments

• Use comparability for discriminant properties when narrowing types for a default switch clause

  #61211 commented on Mar 12, 2025 • 0 new comments

• New `--enforceReadonly` compiler option to enforce read-only semantics in type relations

  #58296 commented on Mar 13, 2025 • 0 new comments

• More specific TemplateStringsArray type for tagged templates

  #49552 commented on Mar 11, 2025 • 0 new comments

• Add math intrinsic types

  #48198 commented on Mar 12, 2025 • 0 new comments

• TS Perf degradation since last version upgrade

  #61400 commented on Mar 17, 2025 • 0 new comments

• Talk about Exceptions Here

  #56365 commented on Mar 17, 2025 • 0 new comments

• Request: Class Decorator Mutation

  #4881 commented on Mar 17, 2025 • 0 new comments

• Support Expandable Quick Info/Hover Verbosity

  #59029 commented on Mar 17, 2025 • 0 new comments

• TypeScript 5.8 Iteration Plan

  #61023 commented on Mar 17, 2025 • 0 new comments

• Missing controlsList property in HTMLMediaElement

  #31532 commented on Mar 17, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Mar 17, 2025 • 0 new comments

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

  #57564 commented on Mar 17, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Mar 17, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Mar 17, 2025 • 0 new comments

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

  #57009 commented on Mar 17, 2025 • 0 new comments

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

  #53234 commented on Mar 17, 2025 • 0 new comments

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

  #52313 commented on Mar 17, 2025 • 0 new comments

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

  #11920 commented on Mar 17, 2025 • 0 new comments

• Support for declaring index signatures using JSDoc

  #48096 commented on Mar 12, 2025 • 0 new comments

• Computed import types

  #44636 commented on Mar 12, 2025 • 0 new comments

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

  #60908 commented on Mar 12, 2025 • 0 new comments

• Consider property access a form of type guards

  #1260 commented on Mar 12, 2025 • 0 new comments

• Typescript type hint problem

  #60725 commented on Mar 12, 2025 • 0 new comments

• Accessors should be allowed to be optional

  #54240 commented on Mar 12, 2025 • 0 new comments

• tsserver should implement the Language Server Protocol

  #39459 commented on Mar 12, 2025 • 0 new comments

• 6.0 Deprecation Candidates

  #54500 commented on Mar 11, 2025 • 0 new comments

• Alternative to rewriteRelativeImportExtensions & allowImportingTsExtensions

  #61050 commented on Mar 11, 2025 • 0 new comments

• Allow mapped type to declare functions

  #48125 commented on Mar 11, 2025 • 0 new comments

• 'identity' modifier to indicate a function's parameter-less returns should be narrowed like a value

  #60948 commented on Mar 11, 2025 • 0 new comments

• Add override / noImplicitOverride support for interfaces

  #45136 commented on Mar 11, 2025 • 0 new comments

• Option in TSConfig to include hidden/dot files

  #49555 commented on Mar 11, 2025 • 0 new comments

• "Referenced projects must have the new composite setting enabled" does not hold true

  #60465 commented on Mar 11, 2025 • 0 new comments

• Combining destructuring with parameter properties

  #5326 commented on Mar 11, 2025 • 0 new comments

• Different 'find all references' results on export default depending on trigger position

  #48676 commented on Mar 11, 2025 • 0 new comments

• FEATURE REQUEST: For TypeScript / JS add new refactor feature: if class method can be static add tooltip "make method static"

  #58588 commented on Mar 10, 2025 • 0 new comments

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

  #60166 commented on Mar 10, 2025 • 0 new comments

• JSDoc unexpected leading whitespace behaviour with `@example` and `<caption>`

  #43955 commented on Mar 16, 2025 • 0 new comments

• Suggestion: Reopen static and instance side of classes

  #2957 commented on Mar 16, 2025 • 0 new comments

• Allow "T extends enum" generic constraint

  #30611 commented on Mar 16, 2025 • 0 new comments

• Polymorphic "this" for static members

  #5863 commented on Mar 14, 2025 • 0 new comments

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

  #60692 commented on Mar 14, 2025 • 0 new comments

• Inconsistent errors reported between tsc and VSCode (Unions across objects with method overload definitions)

  #53614 commented on Mar 14, 2025 • 0 new comments

• Higher order type inference doesn't work with overloads

  #33594 commented on Mar 14, 2025 • 0 new comments

• The terms in the Refactor menu are not internationalized.

  #61374 commented on Mar 14, 2025 • 0 new comments

• Order member intellisense by inheritance

  #37362 commented on Mar 14, 2025 • 0 new comments

• Feature request: allow user to merge extended arrays in tsconfig files

  #20110 commented on Mar 13, 2025 • 0 new comments

• Exact Types

  #12936 commented on Mar 13, 2025 • 0 new comments

• @ts-ignore for the block scope and imports

  #19573 commented on Mar 13, 2025 • 0 new comments

• allow decorators for functions

  #7318 commented on Mar 13, 2025 • 0 new comments

• TypeScript 5.6 Iteration Plan

  #59250 commented on Mar 13, 2025 • 0 new comments

• “Type instantiation is excessively deep and possibly infinite” but only in a large codebase

  #34933 commented on Mar 13, 2025 • 0 new comments

• Assigning window.location after 5.8.2 upgrade fails

  #61335 commented on Mar 13, 2025 • 0 new comments

• Add `--strictObjectIterables` (bikeshed): exclude primitive (`string`) from `Iterable` types

  #59676 commented on Mar 12, 2025 • 0 new comments

• Enable type parameter lower-bound syntax

  #14520 commented on Mar 12, 2025 • 0 new comments