7 Pull requests merged by 3 people

• Fix errors on type assertions in erasableSyntaxOnly

  #61452 merged Mar 19, 2025

• 🤖 Pick PR #61452 (Fix errors on type assertions in er...) into release-5.8

  #61453 merged Mar 19, 2025

• 🤖 Pick PR #61261 (Fixed accidentally reused comments ...) into release-5.8

  #61290 merged Mar 19, 2025

• 🤖 Pick PR #61342 (Rename type parameters when they ar...) into release-5.8

  #61345 merged Mar 19, 2025

• 🤖 Pick PR #61244 (Ban old-style type assertions under...) into release-5.8

  #61320 merged Mar 19, 2025

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

  #61423 merged Mar 19, 2025

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

  #60921 merged Mar 17, 2025

2 Pull requests opened by 2 people

• Add types for `String.{matchAll,replaceAll}` with a well known symbol

  #61449 opened Mar 19, 2025

• Ban non-ambient namespaces written with `module` keyword

  #61450 opened Mar 19, 2025

31 Issues closed by 10 people

• Generic function constraints degrade in conditionas but work in higher order functions

  #61364 closed Mar 23, 2025

• TypeScript 5.5+ declaration of AbortSignal conflicts with Node.js v14 types

  #61447 closed Mar 23, 2025

• Class satisfies type

  #61324 closed Mar 23, 2025

• Records should not be assignable to Partial Records of incompatible types

  #61456 closed Mar 23, 2025

• Inconsistent behavior of the never return type between function and class method

  #61464 closed Mar 22, 2025

• Union type on object's property behaves different than having a union of the whole object with all possible values for this field

  #61202 closed Mar 22, 2025

• get property return type inferred incorrectly from 'this' type, when other methods exist

  #61361 closed Mar 22, 2025

• `T?` shortcut for `T | undefined`

  #61434 closed Mar 21, 2025

• [ServerErrors][TypeScript] 5.9.0-dev.20250309 vs 5.8.2

  #61386 closed Mar 20, 2025

• [ServerErrors][JavaScript] 5.9.0-dev.20250309 vs 5.8.2

  #61385 closed Mar 20, 2025

• [NewErrors] 5.9.0-dev.20250309 vs 5.8.2

  #61384 closed Mar 20, 2025

• Adding the focusVisible attribute to the FocusOptions

  #61458 closed Mar 20, 2025

• tsserver go to definition doesn't work as expected when `disableSourceOfProjectReferenceRedirect` is enabled

  #61451 closed Mar 20, 2025

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

  #61437 closed Mar 20, 2025

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

  #61435 closed Mar 20, 2025

• Module resolution: the `moduleResolution` compiler option seems set to be `bundler` when the `module` compiler option is set to `ES6`, `ES2015`, `ES2020`, `ES2022`, or `ESNext`.

  #61454 closed Mar 20, 2025

• git clone https://github.com/panntod/Whatsapp-Mentioned-All.git

  #61455 closed Mar 20, 2025

• Automatically Assign Constructor Parameters as Class Properties in TypeScript

  #61457 closed Mar 20, 2025

• Provide a core types Type (result of typeof)

  #61427 closed Mar 20, 2025

• Iteration Plan for 5.9?

  #61428 closed Mar 20, 2025

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

  #61440 closed Mar 20, 2025

• Strange error message when accessing undefined property of an enum

  #61431 closed Mar 20, 2025

• Class implementing interface implicit types

  #61425 closed Mar 20, 2025

• Incorrect narrowing of boolean type when variable is mutated in a timer

  #61445 closed Mar 18, 2025

• TS2551: Property XXX does not exist on type

  #61442 closed Mar 18, 2025

• Cannot find namespace 'config' or File '.../types.ts' is not a module.

  #61444 closed Mar 18, 2025

• JSDoc @import not detecting use in @callback

  #58368 closed Mar 17, 2025

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

  #60908 closed Mar 17, 2025

• 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

17 Issues opened by 17 people

• require("path") does not have types for exports in .ts files

  #61468 opened Mar 23, 2025

• Explicit target type breaks generic parameter inference for function call with intersection return type

  #61467 opened Mar 23, 2025

• `containerSeemsToBeEmptyDomElement` does not check correctly for lib.dom.d.ts

  #61466 opened Mar 22, 2025

• TS complains about assignability instead of narrowing

  #61465 opened Mar 22, 2025

• Narrowing with `in` keyword and `const` identifier

  #61463 opened Mar 21, 2025

• Local function variables are suggested within its default arguments

  #61461 opened Mar 21, 2025

• `InstanceType` and constructor return type inference doesn’t work for built‑in subtypes of `ErrorConstructor`

  #61460 opened Mar 21, 2025

• TypeScript code suggestions include inaccessible private fields from base classes

  #61462 opened Mar 21, 2025

• Add types for `String.{matchAll,replaceAll}` with a well known symbol

  #61448 opened Mar 19, 2025

• `T` is not assignable to `SomeType | Exclude<T, SomeType>` where `T` is a generic union type

  #61446 opened Mar 19, 2025

• Type alias circularly references itself

  #61443 opened Mar 18, 2025

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

  #61441 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

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

  #61436 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

78 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(61258): Renaming namespace with const enum doesn't update enum references

  #61263 commented on Mar 18, 2025 • 4 new comments

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

  #42905 commented on Mar 23, 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 23, 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 23, 2025 • 0 new comments

• Compile error if I named last array destructuring element.

  #41548 commented on Mar 23, 2025 • 0 new comments

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

  #39114 commented on Mar 23, 2025 • 0 new comments

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

  #39650 commented on Mar 23, 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 23, 2025 • 0 new comments

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

  #33471 commented on Mar 23, 2025 • 0 new comments

• Allow extending types referenced through interfaces

  #31843 commented on Mar 23, 2025 • 0 new comments

• Suggestion: Type annotations and interfaces for function declarations

  #22063 commented on Mar 23, 2025 • 0 new comments

• this any typed in some JS object literals

  #22058 commented on Mar 23, 2025 • 0 new comments

• Error inferring types of promise function

  #17873 commented on Mar 23, 2025 • 0 new comments

• Support @class in JSDoc

  #12681 commented on Mar 23, 2025 • 0 new comments

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

  #11920 commented on Mar 23, 2025 • 0 new comments

• Allow wrapped values to be used in place of primitives.

  #2361 commented on Mar 23, 2025 • 0 new comments

• Poor type inference for `reduce`

  #25454 commented on Mar 22, 2025 • 0 new comments

• Conditional type evaluation of type aliases produces different result than their equivalent substitution

  #48070 commented on Mar 22, 2025 • 0 new comments

• Allow specifying exclude as a command line option

  #46005 commented on Mar 22, 2025 • 0 new comments

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

  #61411 commented on Mar 21, 2025 • 0 new comments

• Sort symbol members

  #61420 commented on Mar 20, 2025 • 0 new comments

• Implement erasable Enum Annotations

  #61414 commented on Mar 18, 2025 • 0 new comments

• Sort unions without using type IDs

  #61399 commented on Mar 20, 2025 • 0 new comments

• Bring back return type narrowing + fixes

  #61359 commented on Mar 21, 2025 • 0 new comments

• [WIP] Disallow merging of `enum` declarations

  #61262 commented on Mar 20, 2025 • 0 new comments

• Fix #61098

  #61113 commented on Mar 19, 2025 • 0 new comments

• Make TypeScript itself ESM-only, made possible by require(ESM)

  #58419 commented on Mar 19, 2025 • 0 new comments

• Add option to include default typeRoots when overriding typeRoots

  #30855 commented on Mar 23, 2025 • 0 new comments

• Inconsistent typechecking with require() in JS and TS

  #60032 commented on Mar 23, 2025 • 0 new comments

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

  #57564 commented on Mar 23, 2025 • 0 new comments

• Inconsistent type inference on overloaded function types

  #57351 commented on Mar 23, 2025 • 0 new comments

• mapped type with remapped keys unexpectedly widens type

  #57265 commented on Mar 23, 2025 • 0 new comments

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

  #57009 commented on Mar 23, 2025 • 0 new comments

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

  #53234 commented on Mar 23, 2025 • 0 new comments

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

  #52313 commented on Mar 23, 2025 • 0 new comments

• Regression in 4.8 where string union type widens to string

  #50635 commented on Mar 23, 2025 • 0 new comments

• Intersection causes incorrect type compatability

  #48720 commented on Mar 23, 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 23, 2025 • 0 new comments

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

  #43943 commented on Mar 23, 2025 • 0 new comments

• SUGGESTION: add support for writeonly properties on interfaces

  #21759 commented on Mar 21, 2025 • 0 new comments

• Strict null checks for Map members

  #9619 commented on Mar 20, 2025 • 0 new comments

• Auto-import priority rules

  #51155 commented on Mar 20, 2025 • 0 new comments

• CSS module support

  #46689 commented on Mar 19, 2025 • 0 new comments

• Talk about Exceptions Here

  #56365 commented on Mar 19, 2025 • 0 new comments

• Support source phase imports

  #61216 commented on Mar 19, 2025 • 0 new comments

• Add allowImportingJsExtensions option to prevent incorrect .js imports

  #61371 commented on Mar 19, 2025 • 0 new comments

• refactor: New file generates import from wrong module specifier

  #58897 commented on Mar 19, 2025 • 0 new comments

• Missing controlsList property in HTMLMediaElement

  #31532 commented on Mar 19, 2025 • 0 new comments

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

  #48212 commented on Mar 19, 2025 • 0 new comments

• Disable type checking for node_modules entirely

  #40426 commented on Mar 19, 2025 • 0 new comments

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

  #61395 commented on Mar 19, 2025 • 0 new comments

• TS Perf degradation since last version upgrade

  #61400 commented on Mar 18, 2025 • 0 new comments

• auto-import with `package.json#imports` does not take `moduleResolution` into account

  #60405 commented on Mar 18, 2025 • 0 new comments

• Intellisense: deprioritise native function methods

  #61426 commented on Mar 17, 2025 • 0 new comments

• Typescript compiler hangs indefinitely

  #61422 commented on Mar 17, 2025 • 0 new comments

• Request: Class Decorator Mutation

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

• TypeScript 5.8 Iteration Plan

  #61023 commented on Mar 17, 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

• 6.0 Deprecation Candidates

  #54500 commented on Mar 21, 2025 • 0 new comments

• Sourcemap - names array empty for all files

  #9627 commented on Mar 21, 2025 • 0 new comments

• Proposal: Partial Type Argument Inference

  #26242 commented on Mar 21, 2025 • 0 new comments

• Support Expandable Quick Info/Hover Verbosity

  #59029 commented on Mar 21, 2025 • 0 new comments

• tsserver should implement the Language Server Protocol

  #39459 commented on Mar 21, 2025 • 0 new comments

• Type annotation for all exports in the module

  #38511 commented on Mar 21, 2025 • 0 new comments

• typeToString doesn't respect TypeFormatFlags.MultilineObjectLiterals

  #61348 commented on Mar 20, 2025 • 0 new comments

• Support for `JSON.rawJSON()`

  #61330 commented on Mar 20, 2025 • 0 new comments

• Negated types

  #4196 commented on Mar 20, 2025 • 0 new comments

• Spurious missing `Symbol.iterator` on `never` when `yield*`ing generic call within a generic call

  #61318 commented on Mar 20, 2025 • 0 new comments

• Instantiable types from return types of contextual signatures don't provide contextual type information for return expressions

  #61197 commented on Mar 20, 2025 • 0 new comments

• Intellisense doesn't narrow properly when discriminator is a template literal

  #61347 commented on Mar 20, 2025 • 0 new comments

• JSX types should automatically pick setter types instead of getter types.

  #61341 commented on Mar 20, 2025 • 0 new comments

• Suggestion: Support readonly interfaces in `getSuggestedLibFor...`

  #61323 commented on Mar 20, 2025 • 0 new comments

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

  #61429 commented on Mar 20, 2025 • 0 new comments

• `transformTime` performance regression since 5.6.x

  #61406 commented on Mar 20, 2025 • 0 new comments

• tsc --init-basic

  #46150 commented on Mar 20, 2025 • 0 new comments

• export access modifiers

  #41316 commented on Mar 20, 2025 • 0 new comments

• Accept de-structured elements in type predicates

  #41173 commented on Mar 20, 2025 • 0 new comments