1 Pull request merged by 1 person

• Restore AbortSignal.abort

  #62086 merged Jul 17, 2025

2 Pull requests opened by 2 people

• Don't inherit JSDocs from unrelated base properties onto constructor parameters with the same names

  #62077 opened Jul 15, 2025

• Fix optional property quick info showing redundant '| undefined'

  #62084 opened Jul 16, 2025

10 Issues closed by 3 people

• Suggestion: add excludeTypeRoots to tsconfig

  #62089 closed Jul 18, 2025

• Changing or reloading the current page via location should cause unreachable code error

  #62073 closed Jul 18, 2025

• Linter didn't detect { [x: string]: any; }[] !== { [x: string]: any; }

  #62087 closed Jul 17, 2025

• Global classes allow `globalThis.ClassName` but not `typeof globalThis.ClassName`

  #62078 closed Jul 17, 2025

• Error: Debug Failure. False expression.

  #52952 closed Jul 17, 2025

• Implicit `this` parameter bypasses assignability checks with derived methods

  #62055 closed Jul 17, 2025

• Unexpected behavior of enum keys while evaluating mapped types

  #62051 closed Jul 17, 2025

• Missing parser error for arguments in class field

  #62062 closed Jul 17, 2025

• Typesafety violation

  #62043 closed Jul 17, 2025

• `configFileName` on `ProjectInfo` returns `projectName` which is inconsistent with commented behavior

  #62082 closed Jul 16, 2025

6 Issues opened by 6 people

• Controlled runtime inference for trusted pure functions (secureInference)

  #62088 opened Jul 18, 2025

• [isolatedDeclarations] function expressions as an argument to a function call that is exported are reported as needing an annotation

  #62085 opened Jul 17, 2025

• Google feedback on TS 5.9-beta

  #62083 opened Jul 16, 2025

• `export { _void as void }` leads to exporting duplicate identifiers

  #62081 opened Jul 16, 2025

• [tsserver] Multi-project goto definition with accurate results

  #62080 opened Jul 16, 2025

• Unable to infer parameters for generic constructor/functions with a distributive conditional type

  #62079 opened Jul 16, 2025

51 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 switch-true case-true narrowing to behave equivalently to default case

  #59459 commented on Jul 18, 2025 • 2 new comments

• Covariance in intersection

  #62049 commented on Jul 16, 2025 • 0 new comments

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

  #39114 commented on Jul 18, 2025 • 0 new comments

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

  #39650 commented on Jul 18, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Jul 18, 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 Jul 18, 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 Jul 18, 2025 • 0 new comments

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

  #42905 commented on Jul 18, 2025 • 0 new comments

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

  #43943 commented on Jul 18, 2025 • 0 new comments

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

  #46791 commented on Jul 18, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Jul 18, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Jul 18, 2025 • 0 new comments

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

  #52313 commented on Jul 18, 2025 • 0 new comments

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

  #53234 commented on Jul 18, 2025 • 0 new comments

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

  #57009 commented on Jul 18, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Jul 18, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Jul 18, 2025 • 0 new comments

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

  #57564 commented on Jul 18, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Jul 18, 2025 • 0 new comments

• JSDoc export type support

  #48104 commented on Jul 18, 2025 • 0 new comments

• Allow users to customize the variance of built-in `Array`

  #52621 commented on Jul 18, 2025 • 0 new comments

• T | (() => T)

  #37663 commented on Jul 18, 2025 • 0 new comments

• Add math intrinsic types

  #48198 commented on Jul 18, 2025 • 0 new comments

• Don't compare "missing" to `undefined` in `compareProperties` under `exactOptionalPropertyTypes`

  #61683 commented on Jul 16, 2025 • 0 new comments

• Fix JSDoc @import crashes in getCompletionEntryDetails

  #62028 commented on Jul 16, 2025 • 0 new comments

• Fix JSDoc typeof parameter resolution

  #62053 commented on Jul 16, 2025 • 0 new comments

• Bug: string is not a string

  #60764 commented on Jul 16, 2025 • 0 new comments

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

  #48212 commented on Jul 16, 2025 • 0 new comments

• Property does not exist on `globalThis` immediately after declaring it

  #39504 commented on Jul 16, 2025 • 0 new comments

• Intl.Collator#compare method type does not match spec

  #62048 commented on Jul 16, 2025 • 0 new comments

• Show unused public properties and methods

  #29293 commented on Jul 16, 2025 • 0 new comments

• JSON modules without "allowSyntheticDefaultImports"

  #47862 commented on Jul 16, 2025 • 0 new comments

• [TypeScript] Rename Symbol doesn't work as expected with Declaration Merging

  #62065 commented on Jul 16, 2025 • 0 new comments

• TypeScript 5.9 Iteration Plan

  #61648 commented on Jul 16, 2025 • 0 new comments

• ES6 modules cannot use "await" as an identifier

  #8559 commented on Jul 17, 2025 • 0 new comments

• strictNullChecks false-positive when returning or breaking from within loop

  #14143 commented on Jul 17, 2025 • 0 new comments

• CFA doesn't see non executable code

  #15089 commented on Jul 17, 2025 • 0 new comments

• Generic functon doesn't resolve type property when accept this as a parameter ?

  #16791 commented on Jul 17, 2025 • 0 new comments

• Disable formatting a region of code using directives

  #18261 commented on Jul 17, 2025 • 0 new comments

• [FR] `"javascript/typescript.preferences.importModuleSpecifier": "no-relative-parent-imports"`

  #54955 commented on Jul 17, 2025 • 0 new comments

• No narrowing on assert.strictEqual()

  #48244 commented on Jul 17, 2025 • 0 new comments

• Disable type checking for node_modules entirely

  #40426 commented on Jul 18, 2025 • 0 new comments

• disable certain global types for specific files, or specify type roots for specific files.

  #37053 commented on Jul 18, 2025 • 0 new comments

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

  #11920 commented on Jul 18, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Jul 18, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Jul 18, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Jul 18, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Jul 18, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Jul 18, 2025 • 0 new comments

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

  #33471 commented on Jul 18, 2025 • 0 new comments

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

  #38388 commented on Jul 18, 2025 • 0 new comments