12 Pull requests opened by 9 people

• Fix missing ClassificationType.regularExpressionLiteral cases in classifier switch statements

  #61775 opened May 28, 2025

• Improve TypeScript error messages for long type assignments

  #61776 opened May 28, 2025

• fix(checker): report error when using bigint as enum key

  #61777 opened May 28, 2025

• explicitly disallow `using` in ambient contexts

  #61781 opened May 29, 2025

• Reuse single errored signature candidate as resolved signature

  #61787 opened May 30, 2025

• Fixed control flow Analysis of aliased discriminants with parenthesized initializers

  #61788 opened May 31, 2025

• Assign contextual parameter types to functions with type parameters

  #61792 opened Jun 1, 2025

• Fix capitalisation for `checkJs`

  #61795 opened Jun 1, 2025

• fix: const declarations inside block to be more aggressive

  #61796 opened Jun 1, 2025

• Update pr_owners.txt

  #61798 opened Jun 1, 2025

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

  #61804 opened Jun 2, 2025

• Add `--module node20`

  #61805 opened Jun 2, 2025

7 Issues closed by 5 people

• Reference issue for PR #61796: Make const declarations inside block more aggressive

  #61797 closed Jun 1, 2025

• Deprecate `appendChild` in favor of `append`

  #61778 closed May 31, 2025

• tsc - This is not the tsc command you are looking for

  #61786 closed May 30, 2025

• I'm

  #61771 closed May 29, 2025

• new short for expression variable == null ? value : variable; ts(2345)

  #61779 closed May 29, 2025

• Mr

  #60281 closed May 29, 2025

• Narrowing for constant indexed access fails on array getter

  #58803 closed May 28, 2025

21 Issues opened by 17 people

• Critical null pointer bug in incremental builder: affectedFilesIndex undefined access

  #61808 opened Jun 3, 2025

• Declaration Order Affects Type Checking

  #61806 opened Jun 3, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250601 vs 5.8.3

  #61803 opened Jun 1, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250601 vs 5.8.3

  #61802 opened Jun 1, 2025

• Incorrect capitalisation for `checkJs`

  #61801 opened Jun 1, 2025

• [NewErrors] 5.9.0-dev.20250601 vs 5.8.3

  #61800 opened Jun 1, 2025

• `someBool || true` gets the literal type `true` when assigned to a `let` variable at initialization (unlike `true` getting the type `boolean`)

  #61799 opened Jun 1, 2025

• `tsBuildInfoFile` is not extendable. Add an alternative `tsBuildInfoDir` option

  #61794 opened Jun 1, 2025

• Cannot assign Uint8Array type to Uint8Array variable created with constructor

  #61793 opened Jun 1, 2025

• Parameters in functions with type parameters are not contextually-typed

  #61791 opened Jun 1, 2025

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

  #61790 opened Jun 1, 2025

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

  #61789 opened May 31, 2025

• "Used before initialization" error false positives and negatives with optional properties

  #61785 opened May 30, 2025

• Parenthesis break narrowing.

  #61784 opened May 29, 2025

• Function implementation name must be ... (2389) when abstract method is declared again later

  #61783 opened May 29, 2025

• Don't allow a `Record` keyed by a template literal type to be assigned to a type without a compatible index signature

  #61782 opened May 29, 2025

• ReturnType is lost after a simple wrapper function

  #61780 opened May 29, 2025

• ts plugin provide color

  #61773 opened May 28, 2025

• enum member key should reject bigint

  #61772 opened May 27, 2025

• Allow narrowing of unions discriminated by numeric literals using `>` `<` etc

  #61770 opened May 27, 2025

• [DTS] Object literal method with bigint is omitted in generated `.d.ts`, but class method works correctly

  #61769 opened May 27, 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(61747): for (using of = is incorrectly parsed

  #61764 commented on May 27, 2025 • 2 new comments

• Remapped property names has wrong completion, error messages and code actions (snippets)

  #59769 commented on May 27, 2025 • 0 new comments

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

  #33471 commented on Jun 3, 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 3, 2025 • 0 new comments

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

  #39114 commented on Jun 3, 2025 • 0 new comments

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

  #39650 commented on Jun 3, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Jun 3, 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 3, 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 3, 2025 • 0 new comments

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

  #42905 commented on Jun 3, 2025 • 0 new comments

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

  #43943 commented on Jun 3, 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 3, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Jun 3, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Jun 3, 2025 • 0 new comments

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

  #52313 commented on Jun 3, 2025 • 0 new comments

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

  #53234 commented on Jun 3, 2025 • 0 new comments

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

  #57009 commented on Jun 3, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Jun 3, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Jun 3, 2025 • 0 new comments

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

  #57564 commented on Jun 3, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Jun 3, 2025 • 0 new comments

• Add numeric constraints to type parameters of mapped types with narrowed down array constraints

  #55386 commented on May 27, 2025 • 0 new comments

• Check expression operand equivalence in isMatchingReference before computing property key equivalence

  #61608 commented on May 27, 2025 • 0 new comments

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

  #61653 commented on May 29, 2025 • 0 new comments

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

  #61660 commented on May 28, 2025 • 0 new comments

• Suggest completions for type arguments of expressions

  #61758 commented on Jun 2, 2025 • 0 new comments

• Type safety with `TemplateStringsArray` and tag functions

  #33304 commented on May 28, 2025 • 0 new comments

• MsBuild: Target `TypeScriptDeleteOutputFromOtherConfigs` can grab tsc.out from other Configuration

  #50428 commented on May 28, 2025 • 0 new comments

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

  #61351 commented on May 28, 2025 • 0 new comments

• Generic of abstract class should be inferrable from abstract property implemented in subclass

  #39180 commented on May 28, 2025 • 0 new comments

• Should we set '"types": []' for 'tsc init'?

  #39354 commented on May 29, 2025 • 0 new comments

• Improve inference in the presence of context-sensitive expressions

  #47599 commented on May 29, 2025 • 0 new comments

• Mapped types shouldn't transform unknown type

  #29793 commented on May 29, 2025 • 0 new comments

• Add '--bail' option when running '--build' mode

  #29938 commented on May 29, 2025 • 0 new comments

• Potentially misleading documentation for the `types` TSConfig option

  #61256 commented on May 30, 2025 • 0 new comments

• Support opting-out of type narrowing on assignment

  #49669 commented on May 31, 2025 • 0 new comments

• Allow type narrowing to be specified as always-on or always-off

  #57725 commented on May 31, 2025 • 0 new comments

• No semantic token assigned to import names, but available for export

  #57082 commented on May 31, 2025 • 0 new comments

• Support a @nonnull/@nonnullable JSDoc assertion comment

  #23405 commented on May 31, 2025 • 0 new comments

• Proposal: JSX.ElementType

  #13890 commented on May 31, 2025 • 0 new comments

• Generic template literal index does not resolve value type

  #50030 commented on Jun 1, 2025 • 0 new comments

• Variant accessors for index signatures and mapped types

  #43826 commented on Jun 1, 2025 • 0 new comments

• tsc --init update 2024

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

• Make default JSX mode "react"

  #8529 commented on Jun 2, 2025 • 0 new comments

• refactor: New file generates import from wrong module specifier

  #58897 commented on Jun 2, 2025 • 0 new comments

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

  #11920 commented on Jun 3, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Jun 3, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Jun 3, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Jun 3, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Jun 3, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Jun 3, 2025 • 0 new comments