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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

Omit<UnionType, "NonDiscriminatedKey"> cause failure in destructed type

DuplicateAn existing issue was already createdAn existing issue was already created

Status: Open.

#63294 In microsoft/TypeScript;

· yarden-app opened on Mar 24, 2026

Enable all strictness options by default in TypeScript 7.0

DeclinedThe issue was declined as something which matches the TypeScript visionThe issue was declined as something which matches the TypeScript vision

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#63293 In microsoft/TypeScript;

· sakgoyal 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

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

Crash: RangeError: Maximum call stack size exceeded in getNameOfSymbolAsWritten via recursive conditional ReturnType

BugA bug in TypeScriptA bug in TypeScript

Domain: check: Type Circularitystackoverflows caused by circularities, or unexpected errors where no circularity appears to existstackoverflows caused by circularities, or unexpected errors where no circularity appears to exist

Status: Open.

#63273 In microsoft/TypeScript;

· na7ure-a opened on Mar 20, 2026

·  

Backlog

Crash: RangeError: Invalid string length in addSpans during instantiation of recursive template literal types

BugA bug in TypeScriptA bug in TypeScript

Domain: CrashesUnhandled exceptions/panics with no immediate primary root cause identifiedUnhandled exceptions/panics with no immediate primary root cause identified

Status: Open.

#63271 In microsoft/TypeScript;

· na7ure-a opened on Mar 19, 2026

·  

Backlog

Crash: RangeError: Maximum call stack size exceeded in isRelatedTo with recursive tuple types and spread elements

BugA bug in TypeScriptA bug in TypeScript

Domain: check: Type Circularitystackoverflows caused by circularities, or unexpected errors where no circularity appears to existstackoverflows caused by circularities, or unexpected errors where no circularity appears to exist

Status: Open.

#63270 In microsoft/TypeScript;

· na7ure-a opened on Mar 19, 2026

·  

Backlog

Regression: RangeError: Maximum call stack size exceeded in instantiateTypeWorker with recursive intersections and invalid type queries

BugA bug in TypeScriptA bug in TypeScript

Domain: check: Type Circularitystackoverflows caused by circularities, or unexpected errors where no circularity appears to existstackoverflows caused by circularities, or unexpected errors where no circularity appears to exist

Status: Open.

#63269 In microsoft/TypeScript;

· na7ure-a opened on Mar 19, 2026

·  

Backlog

Type narrowing incorrect when providing some function generics when default generics present

DuplicateAn existing issue was already createdAn existing issue was already created

Status: Open.

#63259 In microsoft/TypeScript;

· ChromeQ opened on Mar 18, 2026

Mechanism to specify input source location to find package.json instead of output source location when determining module format

Needs ProposalThis issue needs a plan that clarifies the finer details of how it could be implemented.This issue needs a plan that clarifies the finer details of how it could be implemented.

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#63251 In microsoft/TypeScript;

· monsanto opened on Mar 14, 2026