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Deprecation error message reporting method type as deprecated instead of method name

BugA bug in TypeScriptA bug in TypeScript

Domain: Error MessagesThe issue relates to error messagingThe issue relates to error messaging

Help WantedYou can do thisYou can do this

Status: Open.

#62396 In microsoft/TypeScript;

· andrewbranch opened on Sep 4, 2025

Distribute property type union members to create union of object types

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

Status: Open.

#36969 In microsoft/TypeScript;

· ethanresnick opened on Feb 23, 2020

Unexpected "'Type' is declared but its value is never read." error with jsdoc @import syntax

BugA bug in TypeScriptA bug in TypeScript

Domain: JSDocRelates to JSDoc parsing and type generationRelates to JSDoc parsing and type generation

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

Help WantedYou can do thisYou can do this

Status: Open.

#60908 In microsoft/TypeScript;

· DavidBruant opened on Jan 2, 2025

"const" was transformed to "var" when target is "esnext"

BugA bug in TypeScriptA bug in TypeScript

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

Help WantedYou can do thisYou can do this

Status: Open.

#59877 In microsoft/TypeScript;

· Roise-yue opened on Sep 6, 2024

Incorrect use-before-declaration error in async IIFE initializer

BugA bug in TypeScriptA bug in TypeScript

Domain: BinderGenerally crashes in, or caused by, the binder not doing something rightGenerally crashes in, or caused by, the binder not doing something right

Help WantedYou can do thisYou can do this

Status: Open.

#50123 In microsoft/TypeScript;

· Jessidhia opened on Aug 1, 2022

[TS 5.4.0-beta] .d.ts emit adding an inline type import instead of utilising existing import

Domain: Declaration EmitThe issue relates to the emission of d.ts filesThe issue relates to the emission of d.ts files

Help WantedYou can do thisYou can do this

Possible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some cases

Status: Open.

#57415 In microsoft/TypeScript;

· acutmore opened on Feb 15, 2024

Narrowing discriminated union via type predicate and type assertion results in different behavior.

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

Status: Open.

#45770 In microsoft/TypeScript;

· MicahZoltu opened on Sep 7, 2021

Problem with infer two types from string at same time

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

Status: Open.

#56936 In microsoft/TypeScript;

· AtataUruru opened on Jan 3, 2024

Decouple jsx element type from jsx factory return type and sfc return type

Breaking ChangeWould introduce errors in existing codeWould introduce errors in existing code

Domain: JSX/TSXRelates to the JSX parser and emitterRelates to the JSX parser and emitter

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".

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

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#21699 In microsoft/TypeScript;

· weswigham opened on Feb 6, 2018

Go to definition for TypeScript literal strings

Domain: LS: Symbol NavigationRelates to go-to-definition, find-all-references, highlighting/occurrences.Relates to go-to-definition, find-all-references, highlighting/occurrences.

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

Help WantedYou can do thisYou can do this

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#49033 In microsoft/TypeScript;

· KATT opened on May 9, 2022

Inability to use typeof on an ES private property

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

Help WantedYou can do thisYou can do this

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#47595 In microsoft/TypeScript;

· rraziel opened on Jan 25, 2022

Conditional type prevents assignability

BugA bug in TypeScriptA bug in TypeScript

Domain: Conditional TypesThe issue relates to conditional typesThe issue relates to conditional types

Help WantedYou can do thisYou can do this

Status: Open.

#48033 In microsoft/TypeScript;

· dylhunn opened on Feb 25, 2022

<code>deleteCount</code> param to <code>splice()</code> is not optional in es5 types

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

Status: Open.

#32638 In microsoft/TypeScript;

· tjenkinson opened on Jul 31, 2019

Trigger Node type acquisition on matching shebang

Domain: JavaScriptThe issue relates to JavaScript specificallyThe issue relates to JavaScript specifically

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#46278 In microsoft/TypeScript;

· Mlocik97 opened on Oct 8, 2021

Dangerous "name" (and potentially others) global

CommittedThe team has roadmapped this issueThe team has roadmapped this issue

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

Good First IssueWell scoped, documented and has the green lightWell scoped, documented and has the green light

Help WantedYou can do thisYou can do this

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#18433 In microsoft/TypeScript;

· pocesar opened on Sep 13, 2017

cloneNode should return sub type, not Node

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.

#283 In microsoft/TypeScript;

· dlee opened on Jul 28, 2014

Abstract classes will still import the value for a computed property at runtime

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.

#33525 In microsoft/TypeScript;

· puppy0cam opened on Sep 20, 2019

Intellisense does not work with [P in keyof T]

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#13701 In microsoft/TypeScript;

· geverges-oleg opened on Jan 26, 2017

Support Intellisense for string/number literals in a widened union

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

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

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#33471 In microsoft/TypeScript;

· orta opened on Sep 17, 2019

document.createTreewalker and document.createNodeIterator have missing signature types that which are supported both in IE, Firefox and Chrome

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

Status: Open.

#33462 In microsoft/TypeScript;

· mrttrifork opened on Sep 17, 2019

jsdoc mouse hover definition {Array.&lt;static class&gt;} bug

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#33455 In microsoft/TypeScript;

· jonlepage opened on Sep 16, 2019

Compiler API: no Symbol for Node

BugA bug in TypeScriptA bug in TypeScript

Domain: APIRelates to the public API for TypeScriptRelates to the public API for TypeScript

Status: Open.

#13165 In microsoft/TypeScript;

· aiboost opened on Dec 25, 2016

navto does not include jsdoc @typedef symbols

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#33404 In microsoft/TypeScript;

· mjbvz opened on Sep 13, 2019

support destructuring parameter @param tag in tsdoc

Experience EnhancementNoncontroversial enhancementsNoncontroversial enhancements

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#33367 In microsoft/TypeScript;

· xiaoxiangmoe opened on Sep 11, 2019

Type of heterogeneous enum value can't be inferred correctly when used in object literal

BugA bug in TypeScriptA bug in TypeScript

Domain: enumEnums and their associated types/valuesEnums and their associated types/values

Status: Open.

#33439 In microsoft/TypeScript;

· whzx5byb opened on Sep 15, 2019