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Last updated May 30, 2025
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  • Unexpected "'Type' is declared but its value is never read." error with jsdoc @import syntax

    BugA bug in TypeScript
    Fix AvailableA PR has been opened for this issue
    Help WantedYou 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 TypeScript
    Help WantedYou 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 TypeScript
    Help WantedYou 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

    Help WantedYou can do this
    Possible ImprovementThe 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.
    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.
    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 code
    Domain: JSX/TSXRelates to the JSX parser and emitter
    Effort: ModerateRequires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".
    Fix AvailableA PR has been opened for this issue
    SuggestionAn idea for TypeScript
    Status: Open.
    #21699 In microsoft/TypeScript;
    · weswigham opened on Feb 6, 2018

  • Go to definition for TypeScript literal strings

    Domain: Symbol NavigationRelates to go-to-definition, find-all-references, highlighting/occurrences.
    Experience EnhancementNoncontroversial enhancements
    Help WantedYou can do this
    SuggestionAn 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 enhancements
    Help WantedYou can do this
    SuggestionAn idea for TypeScript
    Status: Open.
    #47595 In microsoft/TypeScript;
    · rraziel opened on Jan 25, 2022

  • Conditional type prevents assignability

    BugA bug in TypeScript
    Help WantedYou can do this
    Status: Open.
    #48033 In microsoft/TypeScript;
    · dylhunn opened on Feb 25, 2022

  • source.organizeImports causing extra blank line

    BugA bug in TypeScript
    Domain: Refactoringse.g. extract to constant or function, rename symbol
    Help WantedYou can do this
    Status: Open.
    #48126 In microsoft/TypeScript;
    · clabough opened on Mar 4, 2022

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

    BugA bug in TypeScript
    Domain: lib.d.tsThe 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 specifically
    Experience EnhancementNoncontroversial enhancements
    SuggestionAn idea for TypeScript
    Status: Open.
    #46278 In microsoft/TypeScript;
    · Mlocik97 opened on Oct 8, 2021

  • Move to new file doesn't maintain prologues directives, ts-check

    BugA bug in TypeScript
    Domain: Refactoringse.g. extract to constant or function, rename symbol
    Effort: ModerateRequires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".
    Help WantedYou can do this
    Status: Open.
    #30478 In microsoft/TypeScript;
    · DanielRosenwasser opened on Mar 19, 2019

  • Dangerous "name" (and potentially others) global

    CommittedThe team has roadmapped this issue
    Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScript
    Good First IssueWell scoped, documented and has the green light
    Help WantedYou can do this
    SuggestionAn 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 TypeScript
    Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScript
    Help WantedYou can do this
    Status: Open.
    #283 In microsoft/TypeScript;
    · dlee opened on Jul 28, 2014

  • Go to implementation misses some implementations

    BugA bug in TypeScript
    Status: Open.
    #11788 In microsoft/TypeScript;
    · sandersn opened on Oct 21, 2016

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

    BugA bug in TypeScript
    Status: Open.
    #33525 In microsoft/TypeScript;
    · puppy0cam opened on Sep 20, 2019

  • Intellisense does not work with [P in keyof T]

    Experience EnhancementNoncontroversial enhancements
    SuggestionAn 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 enhancements
    Has ReproThis issue has compiler-backed repros: https://aka.ms/ts-repros
    SuggestionAn 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 TypeScript
    Domain: lib.d.tsThe 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 enhancements
    SuggestionAn idea for TypeScript
    Status: Open.
    #33455 In microsoft/TypeScript;
    · jonlepage opened on Sep 16, 2019

  • Compiler API: no Symbol for Node

    BugA bug in TypeScript
    Status: Open.
    #13165 In microsoft/TypeScript;
    · aiboost opened on Dec 25, 2016

  • navto does not include jsdoc @typedef symbols

    Experience EnhancementNoncontroversial enhancements
    SuggestionAn idea for TypeScript
    Status: Open.
    #33404 In microsoft/TypeScript;
    · mjbvz opened on Sep 13, 2019

  • support destructuring parameter @param tag in tsdoc

    Experience EnhancementNoncontroversial enhancements
    SuggestionAn idea for TypeScript
    Status: Open.
    #33367 In microsoft/TypeScript;
    · xiaoxiangmoe opened on Sep 11, 2019
    •