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Error type constructor

Status: Open.

#63315 In microsoft/TypeScript;

· masaeedu opened on Mar 28, 2026

Allow structural typing of prototypes

Awaiting More FeedbackThis means we'd like to hear from more people who would be helped by this featureThis means we'd like to hear from more people who would be helped by this feature

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#63314 In microsoft/TypeScript;

· 5cover opened on Mar 28, 2026

Type of return value of yield cannot be inferred from explicitly declared TNext

Status: Open.

#63313 In microsoft/TypeScript;

· zimtsui opened on Mar 28, 2026

typescript.d.ts uses ES2015+ globals (Map, ReadonlyMap) without /// <reference lib> directive

Status: Open.

#63311 In microsoft/TypeScript;

· baraknaveh opened on Mar 28, 2026

Regression in 6.0: type inferred from const with broader type is too narrow

Status: Open.

#63309 In microsoft/TypeScript;

· trevorade opened on Mar 27, 2026

let a = {} infers {} instead of object, which seems too wide for the initializer

Not a DefectThis behavior is one of several equally-correct optionsThis behavior is one of several equally-correct options

Status: Open.

#63308 In microsoft/TypeScript;

· 5cover opened on Mar 27, 2026

packageId is not generated when name or version fields are missing

Won't FixThe severity and priority of this issue do not warrant the time or complexity needed to fix itThe severity and priority of this issue do not warrant the time or complexity needed to fix it

Status: Open.

#63307 In microsoft/TypeScript;

· denis-sokolov opened on Mar 27, 2026

AsyncDisposable should allow non-Promise returning implementations

Working as IntendedThe behavior described is the intended behavior; this is not a bugThe behavior described is the intended behavior; this is not a bug

Status: Open.

#63299 In microsoft/TypeScript;

· mfulton26 opened on Mar 25, 2026

Custom syntax for distributive conditional

Awaiting More FeedbackThis means we'd like to hear from more people who would be helped by this featureThis means we'd like to hear from more people who would be helped by this feature

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#63295 In microsoft/TypeScript;

· yarden-app opened on Mar 24, 2026

Removing optional modifier in a mapped type behaves inconsistently b/w array vs object

Needs InvestigationThis issue needs a team member to investigate its status.This issue needs a team member to investigate its status.

Status: Open.

#63291 In microsoft/TypeScript;

· juhort opened on Mar 24, 2026

RegExpIndicesArray - Named group indices can be undefined

Awaiting More FeedbackThis means we'd like to hear from more people who would be helped by this featureThis means we'd like to hear from more people who would be helped by this feature

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#63281 In microsoft/TypeScript;

· TomStrepsil opened on Mar 22, 2026

[Localization] Misleading Chinese translation for TS2561 error message

BugA bug in TypeScriptA bug in TypeScript

Domain: Error MessagesThe issue relates to error messagingThe issue relates to error messaging

i18n(Ping PDostalek) Translation/Localization/Internationalization of messages in the compiler.(Ping PDostalek) Translation/Localization/Internationalization of messages in the compiler.

Status: Open.

#63274 In microsoft/TypeScript;

· HHaoWang opened on Mar 20, 2026