3 Pull requests merged by 2 people

• Create fourslash syntax, compiler testcase, and build instructions summary

  #61900 merged Jun 18, 2025

• LEGO: Pull request from lego/hb_5378966c-b857-470a-8675-daebef4a6da1_20250618192323088 to main

  #61898 merged Jun 18, 2025

• LEGO: Pull request from lego/hb_5378966c-b857-470a-8675-daebef4a6da1_20250617192341571 to main

  #61887 merged Jun 17, 2025

9 Pull requests opened by 8 people

• Watch failed lookups, affecting locations only if resolution was failed

  #61861 opened Jun 13, 2025

• 🤖 Pick PR #61861 (Watch failed lookups, affecting loc...) into release-5.8

  #61864 opened Jun 13, 2025

• fix(61867): fix find-all-refs for constructors involving string literals

  #61869 opened Jun 14, 2025

• Do not set `valueDeclaration` for intersection properties when one symbol does not have a `valueDeclaration`

  #61872 opened Jun 15, 2025

• [experimental] Force strict binding

  #61888 opened Jun 17, 2025

• Be strict about package.json JSON syntax

  #61901 opened Jun 18, 2025

• [WIP] Symbol properties on objects are imported by type and not by value when auto-completed

  #61902 opened Jun 18, 2025

• Use strict subtype relation in `getCommonSupertype`

  #61903 opened Jun 19, 2025

• Fix typo in nightly yaml

  #61906 opened Jun 20, 2025

19 Issues closed by 7 people

• Error in ts.findAncestor caused by ASI

  #61905 closed Jun 20, 2025

• Module resolution: Setting `target` to `ES6` and higher results in numerous `TS2792: Cannot find module 'undici-types'` errors

  #61877 closed Jun 20, 2025

• The output structures of `rootDir` and `rootDirs` are inconsistent

  #61883 closed Jun 20, 2025

• Error when overriding arrow function in superclass with regular method in subclass to correctly bind `this` to super

  #61882 closed Jun 19, 2025

• Intellisense should offer "constructor" property (Javascript)

  #61863 closed Jun 19, 2025

• Detect no overlap for "in" keyword

  #61874 closed Jun 19, 2025

• Create fourslash syntax, compiler testcase, and build instructions summary

  #61899 closed Jun 18, 2025

• noUnusedLocals incorrectly reports `using` resources as unused unless explicitly used

  #61890 closed Jun 18, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250615 vs 5.8.3

  #61878 closed Jun 17, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250615 vs 5.8.3

  #61876 closed Jun 17, 2025

• [NewErrors] 5.9.0-dev.20250615 vs 5.8.3

  #61875 closed Jun 17, 2025

• Build instructions of TypeScript

  #61865 closed Jun 16, 2025

• Broken generic default

  #61873 closed Jun 16, 2025

• Please always add default values to `tsconfig.json` documentation

  #61790 closed Jun 16, 2025

• doc: The mdn links of requestAnimationFrame and cancelAnimationFrame are incorrect

  #61879 closed Jun 16, 2025

• Skip assignment narrowing when declaring & initializing a variable in the same statement

  #61789 closed Jun 16, 2025

• [isolatedDeclarations] explicit annotation required when `satisfies T` is provided on an object that would otherwise be inferrable

  #61859 closed Jun 16, 2025

• Add type something = {}

  #61847 closed Jun 15, 2025

• await (await fn()).method() gets wrong type in intellisense

  #61849 closed Jun 13, 2025

16 Issues opened by 15 people

• @azure/msal-angular Shows Red Import Error in VS Code but Builds Fine

  #61904 opened Jun 19, 2025

• Symbol properties on objects are imported by type and not by value when auto-completed

  #61894 opened Jun 18, 2025

• Preserve computed property in `--isolatedDeclarations` emit

  #61892 opened Jun 18, 2025

• Namespaces: use before declaration is not reported

  #61891 opened Jun 18, 2025

• Comparing arrays doesn't give any error

  #61889 opened Jun 18, 2025

• Add `.isApplicableIndexType()` to the `TypeChecker`

  #61886 opened Jun 17, 2025

• (not) Deprecating `--rootDirs`

  #61885 opened Jun 17, 2025

• __esDecorate transpiled code uses "Symbol" even of this is shadowed by a local variable

  #61884 opened Jun 17, 2025

• Type Guard Documentation Is Incorrectly Labeled as Deprecated

  #61881 opened Jun 16, 2025

• When there is only one member in an enumDeclaration, const enum E {A = 1}, the declared type of the enumDeclaration is incorrect

  #61871 opened Jun 15, 2025

• `T` satisfies a constraint that `E extends T` does not (specifically with `Omit`)

  #61870 opened Jun 14, 2025

• Homomorphic mapped types with arrays doesn't work well with recursive arrays

  #61868 opened Jun 14, 2025

• TypeError: Cannot read properties of undefined (reading 'length')

  #61867 opened Jun 14, 2025

• Distributive generic with extends constraint not assignable to original non-distributed type

  #61866 opened Jun 14, 2025

• Class decorators run before class static side is fully defined when downleveling

  #61862 opened Jun 13, 2025

• Comment like jsx text emitted twice when preserve enabled

  #61860 opened Jun 13, 2025

47 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.

• [BUG] This JSX tag requires the module path 'react/jsx-runtime' to exist, but none could be found. Make sure you have types for the appropriate package installed.

  #61756 commented on Jun 13, 2025 • 0 new comments

• No inlay hints. provideInlayHints results in Debug Failure. Unexpected node.

  #61845 commented on Jun 13, 2025 • 0 new comments

• Spurious "referenced directly or indirectly in its own initializer" when combined with narrowing, asserts function, and loop

  #53955 commented on Jun 14, 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 Jun 14, 2025 • 0 new comments

• Proposal: Partial Type Argument Inference

  #26242 commented on Jun 15, 2025 • 0 new comments

• Please add default values to all properties in configuration reference

  #48441 commented on Jun 16, 2025 • 0 new comments

• TypeScript 5.8 Iteration Plan

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

• TS 5.8 TypeError: Cannot read properties of undefined (reading 'kind')

  #61351 commented on Jun 17, 2025 • 0 new comments

• Improve typings of Array.map when called on tuples

  #29841 commented on Jun 17, 2025 • 0 new comments

• TypeScript class method decorator not rendering properly in version >= 1.63.2

  #47679 commented on Jun 17, 2025 • 0 new comments

• JSDoc `@import` no longer works correctly with default exports

  #60317 commented on Jun 18, 2025 • 0 new comments

• TypeScript skips type-checking despite deleted file in referenced project

  #60335 commented on Jun 18, 2025 • 0 new comments

• Compiler Option typeTruncationLength

  #59035 commented on Jun 18, 2025 • 0 new comments

• Disable type checking for node_modules entirely

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

• Consider allowing packages to define multiple canonical names for their modules

  #42764 commented on Jun 19, 2025 • 0 new comments

• Infinite type instantiation around recursive conditional types

  #60237 commented on Jun 19, 2025 • 0 new comments

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

  #37053 commented on Jun 19, 2025 • 0 new comments

• [Feature request]type level equal operator

  #48100 commented on Jun 20, 2025 • 0 new comments

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

  #11920 commented on Jun 20, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Jun 20, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Jun 20, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Jun 20, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Jun 20, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Jun 20, 2025 • 0 new comments

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

  #33471 commented on Jun 20, 2025 • 0 new comments

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

  #38388 commented on Jun 20, 2025 • 0 new comments

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

  #39114 commented on Jun 20, 2025 • 0 new comments

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

  #39650 commented on Jun 20, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Jun 20, 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 Jun 20, 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 Jun 20, 2025 • 0 new comments

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

  #42905 commented on Jun 20, 2025 • 0 new comments

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

  #43943 commented on Jun 20, 2025 • 0 new comments

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

  #46791 commented on Jun 20, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Jun 20, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Jun 20, 2025 • 0 new comments

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

  #52313 commented on Jun 20, 2025 • 0 new comments

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

  #53234 commented on Jun 20, 2025 • 0 new comments

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

  #57009 commented on Jun 20, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Jun 20, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Jun 20, 2025 • 0 new comments

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

  #57564 commented on Jun 20, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Jun 20, 2025 • 0 new comments

• Implement partial type argument inference using the _ sigil

  #26349 commented on Jun 15, 2025 • 0 new comments

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

  #58296 commented on Jun 16, 2025 • 0 new comments

• Fixed crash in `hasVisibleDeclarations` related to binding elements

  #61352 commented on Jun 17, 2025 • 0 new comments

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

  #61804 commented on Jun 16, 2025 • 0 new comments