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Fix confusing keywords "as const" and introduce "valueof"

Status: Open.

#63557 In microsoft/TypeScript;

· kadun13nindi12 opened on Jun 15, 2026

override missing from createElementNS

Status: Open.

#63556 In microsoft/TypeScript;

· mozesstumpf opened on Jun 15, 2026

Quadratic check time for diamond-shaped interface inheritance graphs

Status: Open.

#63555 In microsoft/TypeScript;

· canonic-epicure opened on Jun 15, 2026

different behaviour between function and arrow function while define never return type

Status: Open.

#63553 In microsoft/TypeScript;

· CaptainJon opened on Jun 15, 2026

Destructured function does not show outline of inner function parameters

Status: Open.

#63551 In microsoft/TypeScript;

· aiday-mar opened on Jun 12, 2026

packageId is not set when calling resolveModuleName on a directory with an index.d.ts file in a dependency

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.

#63547 In microsoft/TypeScript;

· TheLazySquid opened on Jun 10, 2026

Duplicate function declarations in generated .d.ts for non-module JS files with allowJs + declaration

Status: Open.

#63546 In microsoft/TypeScript;

· LangLangBart opened on Jun 10, 2026

Better ownership lint to eliminate ownership chaos for generated code

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.

#63540 In microsoft/TypeScript;

· loynoir opened on Jun 6, 2026

Design Meeting Notes, 2026-06-04

Design NotesNotes from our design meetingsNotes from our design meetings

Status: Open.

#63533 In microsoft/TypeScript;

· RyanCavanaugh opened on Jun 4, 2026

Declarations that shadow global Symbol break emit for using declarations

BugA bug in TypeScriptA bug in TypeScript

Domain: JS EmitThe issue relates to the emission of JavaScriptThe issue relates to the emission of JavaScript

Status: Open.

#63522 In microsoft/TypeScript;

· DanielRosenwasser opened on Jun 1, 2026

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Backlog

Font bug

Needs More InfoThe issue still hasn't been fully clarifiedThe issue still hasn't been fully clarified

Status: Open.

#63507 In microsoft/TypeScript;

· Liam1-dev opened on May 26, 2026

Wildcard package.json exports auto-import path does not apply traversal containment checks

BugA bug in TypeScriptA bug in TypeScript

Domain: LS: Auto-import

Status: Open.

#63499 In microsoft/TypeScript;

· zainnadeem786 opened on May 22, 2026

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