1 Pull request merged by 1 person

• Treat functions with @type tags on parameters as typed in JS files

  #61177 merged Apr 14, 2025

5 Pull requests opened by 5 people

• Fix missing properties codefix for property assignment declarations

  #61559 opened Apr 9, 2025

• Don't set parent on non-transient symbols in mergeSymbolTable

  #61560 opened Apr 9, 2025

• Add the `.getNonPrimitiveType()` method to the `TypeChecker`

  #61562 opened Apr 10, 2025

• Fix #61429: Fast arithmetic type check for type-parameters upper-bounded by `bigint` fixed

  #61571 opened Apr 13, 2025

• Bump github/codeql-action from 3.28.13 to 3.28.15 in the github-actions group

  #61576 opened Apr 14, 2025

21 Issues closed by 10 people

• `Parameters` does not work in JS files unless a `@param` has been explicitly defined

  #61172 closed Apr 14, 2025

• Synchronous dynamic imports

  #61580 closed Apr 14, 2025

• Key Remapping in Mapped Types does not contribute to the reference of the original type

  #44643 closed Apr 14, 2025

• Type Cast or Assertions on the FunctionDeclaration

  #40378 closed Apr 14, 2025

• Type narrowing of singleton class

  #54191 closed Apr 14, 2025

• Make tsc --init generate default target to ES6 or higher

  #39308 closed Apr 14, 2025

• Generic key does not match narrow type in nested objects

  #61555 closed Apr 14, 2025

• Function augmented types are enforced inconsistently

  #61554 closed Apr 14, 2025

• Proposing a `try` operator to allow expressions to be protected directly and the result handled normally.

  #61558 closed Apr 13, 2025

• `import.meta.resolve` is not shimmed when using `--rewriteRelativeImportExtensions`

  #61541 closed Apr 13, 2025

• TypeScript reports incorrect error

  #61563 closed Apr 13, 2025

• Inconsistent extends check when comparing a directly written generic (Template<'a'>) to a type-aliased version of the same generic (TA = Template<'a'>)

  #61548 closed Apr 12, 2025

• Partial Mode: IntelliSense not available for Typescript

  #60322 closed Apr 11, 2025

• `asserts err is ResponseError<T>` assertion narrowing doesn't work as expected

  #61564 closed Apr 10, 2025

• Broken Type guard narrowing when `strictnullcheck` is `false`

  #61546 closed Apr 10, 2025

• Allow all error messages from tsc compiler to have their severity customized

  #61557 closed Apr 9, 2025

• `exactOptionalPropertyTypes`: strict type equality is too lenient

  #61547 closed Apr 9, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250406 vs 5.8.3

  #61544 closed Apr 8, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250406 vs 5.8.3

  #61543 closed Apr 8, 2025

• [NewErrors] 5.9.0-dev.20250406 vs 5.8.3

  #61542 closed Apr 8, 2025

• Export collisions not considered errors when in .d.ts files

  #61553 closed Apr 8, 2025

12 Issues opened by 10 people

• jsdoc: Optional function parameters don't have optional type within function definition

  #61579 opened Apr 14, 2025

• Ternary branches not checked

  #61578 opened Apr 14, 2025

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

  #61577 opened Apr 14, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250413 vs 5.8.3

  #61575 opened Apr 13, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250413 vs 5.8.3

  #61574 opened Apr 13, 2025

• [NewErrors] 5.9.0-dev.20250413 vs 5.8.3

  #61573 opened Apr 13, 2025

• Need a new Version of NodeNext? Or remove types from @types/node?

  #61572 opened Apr 13, 2025

• Provide a Warning when tslib is needed, but not declared in the projects package.json as a peer dependency.

  #61569 opened Apr 12, 2025

• namespaces don't respect `const`s

  #61568 opened Apr 12, 2025

• Return type of exported function has or is using name X from external module Y but cannot be named.

  #61567 opened Apr 11, 2025

• Allow return type annotations on setters

  #61561 opened Apr 10, 2025

• Implements typeof object does not scaffold missing properties

  #61556 opened Apr 9, 2025

67 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.

• Expandable hover

  #61492 commented on Apr 14, 2025 • 27 new comments

• Cache repeated mapper instantiations only within a single instantiation call

  #61535 commented on Apr 12, 2025 • 2 new comments

• Improve release publisher pipeline

  #61551 commented on Apr 11, 2025 • 1 new comment

• Inconsistent type inference on overloaded function types

  #57351 commented on Apr 14, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Apr 14, 2025 • 0 new comments

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

  #57009 commented on Apr 14, 2025 • 0 new comments

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

  #53234 commented on Apr 14, 2025 • 0 new comments

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

  #52313 commented on Apr 14, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Apr 14, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Apr 14, 2025 • 0 new comments

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

  #46791 commented on Apr 14, 2025 • 0 new comments

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

  #43943 commented on Apr 14, 2025 • 0 new comments

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

  #42905 commented on Apr 14, 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 Apr 14, 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 Apr 14, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Apr 14, 2025 • 0 new comments

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

  #39650 commented on Apr 14, 2025 • 0 new comments

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

  #39114 commented on Apr 14, 2025 • 0 new comments

• Manually constructed nullish coalescing AST is missing parentheses when printed

  #61369 commented on Apr 11, 2025 • 0 new comments

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

  #57564 commented on Apr 14, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Apr 14, 2025 • 0 new comments

• @deprecated strikethrough doesn't appear in many cases, such as JSX elements, const arrow functions, or properties.

  #39374 commented on Apr 14, 2025 • 0 new comments

• cloneNode should return sub type, not Node

  #283 commented on Apr 14, 2025 • 0 new comments

• `transformTime` performance regression since 5.6.x

  #61406 commented on Apr 14, 2025 • 0 new comments

• Implicitly typed parameters of function properties of generic parameters break autocompletion

  #46916 commented on Apr 14, 2025 • 0 new comments

• Object.defineProperty(variable) does not error in `.js` files if `variable` does not exist

  #61165 commented on Apr 14, 2025 • 0 new comments

• Add a --strictNaNChecks option, and a NaN / integer / float type to avoid runtime NaN errors

  #28682 commented on Apr 15, 2025 • 0 new comments

• Support importing types from a `.mts` file from within a CommonJS file.

  #58195 commented on Apr 15, 2025 • 0 new comments

• `arguments` should not be allowed in class static block

  #48172 commented on Apr 14, 2025 • 0 new comments

• Fix completions for object literal argument when generics have default type

  #51067 commented on Apr 14, 2025 • 0 new comments

• Implement(60881): Added detailed diagnostic for parent to child assignment

  #61145 commented on Apr 13, 2025 • 0 new comments

• fix(57026): Renaming on declaration whose name is a String Literal

  #61353 commented on Apr 11, 2025 • 0 new comments

• Fixed nullish coalesce operator's precedence

  #61372 commented on Apr 11, 2025 • 0 new comments

• Cache mapper instantiations

  #61505 commented on Apr 14, 2025 • 0 new comments

• TypeScript 5.8 Iteration Plan

  #61023 commented on Apr 11, 2025 • 0 new comments

• `Intl.DurationFormat` missing from library definitions

  #60608 commented on Apr 11, 2025 • 0 new comments

• Incorrect type inference for generic class in JavaScript

  #61552 commented on Apr 10, 2025 • 0 new comments

• @ts-ignore for the block scope and imports

  #19573 commented on Apr 10, 2025 • 0 new comments

• Interaction of empty arrays and `satisfies` is unsatisfying

  #51853 commented on Apr 10, 2025 • 0 new comments

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

  #61517 commented on Apr 10, 2025 • 0 new comments

• DOM lib: Add support for Trusted Types API

  #30024 commented on Apr 10, 2025 • 0 new comments

• Filename with two dollar signs ($$) behaves differently when using paths config

  #61538 commented on Apr 9, 2025 • 0 new comments

• Service Worker typings

  #11781 commented on Apr 9, 2025 • 0 new comments

• Import type over generic argument

  #31090 commented on Apr 9, 2025 • 0 new comments

• Array.isArray type narrows to any[] for ReadonlyArray<T>

  #17002 commented on Apr 9, 2025 • 0 new comments

• [bug:7.5.3] Mapper class explicite field regression

  #61540 commented on Apr 8, 2025 • 0 new comments

• Wrong location generated for JSX with whitespace around it when react-jsxdev

  #61533 commented on Apr 8, 2025 • 0 new comments

• Assigning window.location after 5.8.2 upgrade fails

  #61335 commented on Apr 8, 2025 • 0 new comments

• Infer tuple types like template literal types do

  #61539 commented on Apr 8, 2025 • 0 new comments

• Expose design-time type information in TC39 decorator metadata when `emitDecoratorMetadata: true`

  #57533 commented on Apr 8, 2025 • 0 new comments

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

  #38388 commented on Apr 14, 2025 • 0 new comments

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

  #33471 commented on Apr 14, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Apr 14, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Apr 14, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Apr 14, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Apr 14, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Apr 14, 2025 • 0 new comments

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

  #11920 commented on Apr 14, 2025 • 0 new comments

• Dynamically named tuples

  #44939 commented on Apr 14, 2025 • 0 new comments

• Allow Inifinity and -Infinity as number literal types

  #32277 commented on Apr 13, 2025 • 0 new comments

• Missing explicit return type for static methods using private static methods causes return type inference issues in declaration files

  #61545 commented on Apr 12, 2025 • 0 new comments

• Use the width of a type to add newlines in type assignment error messages

  #45896 commented on Apr 12, 2025 • 0 new comments

• Fix "isolatedDeclarations" QuickFix

  #59112 commented on Apr 11, 2025 • 0 new comments

• [Feature request]type level equal operator

  #48100 commented on Apr 11, 2025 • 0 new comments

• "function" semantic token applied instead of "decorator", thus cannot configure correct syntax highlighting

  #50469 commented on Apr 11, 2025 • 0 new comments

• Suggestion: Allow getters to have predicate return types

  #43368 commented on Apr 11, 2025 • 0 new comments

• Incorrect operator precedence when using private fields with nullish coalescing assignment for targets <= es2021

  #61109 commented on Apr 11, 2025 • 0 new comments