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Package missing error from Typescript 7 via npm

Status: Open.

#63668 In microsoft/TypeScript;

· mind-bending-forks opened on Jul 22, 2026

Ambient redeclaration of a global type alias no longer overrides the built-in lib declaration in TypeScript 7.0 (regression from 6.0)

Status: Open.

#63667 In microsoft/TypeScript;

· chrisvltn opened on Jul 22, 2026

[5.9 regression] as const readonly tuple inferred as mutable through a nested generic call under a conditional-type circular constraint

Status: Open.

#63666 In microsoft/TypeScript;

· xkatianx opened on Jul 22, 2026

Incremental builder re-emits entire transitive import closure on a whitespace-only edit (regression in 5.5: exportedModulesMap removal + text version hashes stored as shape signatures)

Status: Open.

#63664 In microsoft/TypeScript;

· kaiguogit opened on Jul 21, 2026

as/satisfies between exponentiation operators cannot be safely erased

BugA bug in TypeScriptA bug in TypeScript

Domain: ParserThe parser didn't handle the syntax correctlyThe parser didn't handle the syntax correctly

Status: Open.

#63661 In microsoft/TypeScript;

· magic-akari opened on Jul 20, 2026

·  

Backlog

JSON imported with import type treated as value

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.

#63659 In microsoft/TypeScript;

· ysulyma opened on Jul 19, 2026

--build --dry reports a noEmit project reference as perpetually out of date (expects emitted output that noEmit never produces)

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

Status: Open.

#63656 In microsoft/TypeScript;

· schickling-assistant opened on Jul 19, 2026

No type mismatch for records with enum keys inside object literal with dynamic key

DuplicateAn existing issue was already createdAn existing issue was already created

Status: Open.

#63655 In microsoft/TypeScript;

· droooney opened on Jul 19, 2026

Template literal union type-checking is exponentially slower when type is explicitly annotated vs inferred

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

Status: Open.

#63653 In microsoft/TypeScript;

· LangLangBart opened on Jul 16, 2026

tsc --watch does not work in docker

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

Status: Open.

#63646 In microsoft/TypeScript;

· laverdet opened on Jul 14, 2026

In a class, an unique symbol attribute is sometime lost during incremental build

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

Status: Open.

#63644 In microsoft/TypeScript;

· denis-migdal opened on Jul 14, 2026

Proposal: Export multiple, runtime-specific declaration files

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.

#63641 In microsoft/TypeScript;

· yassernasc opened on Jul 10, 2026