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Declaration merging can break equality tests for named tuples

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

Status: Not planned (skipped).

#61162 In Microsoft/TypeScript;

· by LukeAbby was closed on Feb 15, 2025

TypeScript 5.3 Iteration Plan

PlanningIteration plans and roadmappingIteration plans and roadmapping

Status: Open.

#55486 In Microsoft/TypeScript;

· DanielRosenwasser opened on Aug 23, 2023

TS 5 Regression. tsconfig extends stop resolving references to node_modules

BugA bug in TypeScriptA bug in TypeScript

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

Status: Closed (completed).

#53314 In Microsoft/TypeScript;

· by Vidda777 was closed on Mar 22, 2023

· 

TypeScript 5.0.3

Regression in 4.8 where string union type widens to string

BugA bug in TypeScriptA bug in TypeScript

Domain: check: Type InferenceRelated to type inference performed during signature resolution or `infer` type resolutionRelated to type inference performed during signature resolution or `infer` type resolution

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

Has ReproThis issue has compiler-backed repros: https://aka.ms/ts-reprosThis issue has compiler-backed repros: https://aka.ms/ts-repros

RescheduledThis issue was previously scheduled to an earlier milestoneThis issue was previously scheduled to an earlier milestone

Status: Open.

#50635 In Microsoft/TypeScript;

· me4502 opened on Sep 5, 2022

· 

TypeScript 5.7.0

Concerns with TypeScript 4.5's Node 12+ ESM Support

DiscussionIssues which may not have code impactIssues which may not have code impact

Status: Closed (completed).

#46452 In Microsoft/TypeScript;

· by DanielRosenwasser was closed on Dec 22, 2022

Class static block does not allow forward reference to static method

BugA bug in TypeScriptA bug in TypeScript

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

Status: Closed (completed).

#45932 In Microsoft/TypeScript;

· by fwienber was closed on Mar 23, 2022

· 

TypeScript 4.6.1

Mixin classes with private/protected constructors are subclassable

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

Status: Open.

#42264 In Microsoft/TypeScript;

· rafasofizada opened on Jan 9, 2021

· 

Backlog

Using an optional call with <code>.flat()</code> produces incorrect types

Has ReproThis issue has compiler-backed repros: https://aka.ms/ts-reprosThis issue has compiler-backed repros: https://aka.ms/ts-repros

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

RescheduledThis issue was previously scheduled to an earlier milestoneThis issue was previously scheduled to an earlier milestone

Status: Closed (completed).

#41007 In Microsoft/TypeScript;

· by tom-sherman was closed on Oct 24, 2023

· 

TypeScript 5.1.0

Support “Arbitrary module namespace identifier names”

Domain: ES ModulesThe issue relates to import/export style module behaviorThe issue relates to import/export style module behavior

Effort: ModerateRequires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".Requires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".

ES NextNew featurers for ECMAScript (a.k.a. ESNext)New featurers for ECMAScript (a.k.a. ESNext)

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

Has ReproThis issue has compiler-backed repros: https://aka.ms/ts-reprosThis issue has compiler-backed repros: https://aka.ms/ts-repros

Help WantedYou can do thisYou can do this

RescheduledThis issue was previously scheduled to an earlier milestoneThis issue was previously scheduled to an earlier milestone

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Closed (completed).

#40594 In Microsoft/TypeScript;

· by ExE-Boss was closed on Jun 4, 2024

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TypeScript 5.6.0

const enum imports are stripped even with isolatedModules

BugA bug in TypeScriptA bug in TypeScript

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

Status: Closed (completed).

#40499 In Microsoft/TypeScript;

· by nayeemrmn was closed on Jan 13, 2021

· 

TypeScript 4.2.0

Types defining <code>Symbol.hasInstance</code> should be eligible to use with the <code>instanceof</code> operator

In DiscussionNot yet reached consensusNot yet reached consensus

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Closed (completed).

#39064 In Microsoft/TypeScript;

· by lazytype was closed on Sep 29, 2023

Allow to find references of the actual type

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.

#39324 In Microsoft/TypeScript;

· bpasero opened on Jun 11, 2020