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NoInfer on second generic parameter doesn't pick up inference from sibling methods

DuplicateAn existing issue was already createdAn existing issue was already created

Status: Open.

#63477 In microsoft/TypeScript;

· paoloricciuti opened on May 14, 2026

=== is not strong enough to narrow equal values to the same type

DuplicateAn existing issue was already createdAn existing issue was already created

Status: Open.

#63476 In microsoft/TypeScript;

· danon opened on May 14, 2026

Simple inversion of && causes types to stop being valid, even though the js execution is the same

Design LimitationConstraints of the existing architecture prevent this from being fixedConstraints of the existing architecture prevent this from being fixed

Status: Open.

#63474 In microsoft/TypeScript;

· danon opened on May 13, 2026

This type in jsdoc cause ts2502 but cannot reproduce with ts

Status: Open.

#63468 In microsoft/TypeScript;

· qwq0 opened on May 11, 2026

Implement interface codefix is offered when the implemented interface type is invalid

Status: Open.

#63465 In microsoft/TypeScript;

· danyalahmed1995 opened on May 10, 2026

default keyword is offered in expression-bodied arrow function completions

BugA bug in TypeScriptA bug in TypeScript

Domain: LS: Completion ListsThe issue relates to showing completion lists in an editorThe issue relates to showing completion lists in an editor

Status: Open.

#63463 In microsoft/TypeScript;

· DhineshPonnarasan opened on May 9, 2026

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Backlog

String.split() method's separator argument should allow 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.

#63456 In microsoft/TypeScript;

· JohanRonnblom opened on May 1, 2026

new super() in static method does not cause error

BugA bug in TypeScriptA bug in TypeScript

Domain: classesBehavior of various `class` constructs, e.g. mixins or base classesBehavior of various `class` constructs, e.g. mixins or base classes

Fix AvailableA PR has been opened for this issueA PR has been opened for this issue

Status: Open.

#63451 In microsoft/TypeScript;

· Withered-Flower-0422 opened on Apr 30, 2026

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Dormant

libReplacement: true lookup folder should be configurable (via typeRoots ?)

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.

#63448 In microsoft/TypeScript;

· freshp86 opened on Apr 29, 2026

symbolToNode stack overflow when using recursive types and functions with type parameters

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.

#63441 In microsoft/TypeScript;

· StyleShit opened on Apr 26, 2026

Paths from tsconfig are not used if declaration is on a different partition

Status: Open.

#63430 In microsoft/TypeScript;

· dragomirtitian opened on Apr 24, 2026

Add type definition for Math.sumPrecise (ES2025 / TC39 proposal)

BugA bug in TypeScriptA bug in TypeScript

Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScriptThe issue relates to the different libraries shipped with TypeScript

Help WantedYou can do thisYou can do this

Status: Open.

#63427 In microsoft/TypeScript;

· 827652549 opened on Apr 23, 2026

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Backlog