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Last updated May 6, 2025
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  • 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

  • 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

  • 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

  • F12 go to definition get 2 same result

    BugA bug in TypeScript
    Domain: Symbol NavigationRelates to go-to-definition, find-all-references, highlighting/occurrences.
    Status: Open.
    #33428 In microsoft/TypeScript;
    · KT-71 opened on Sep 12, 2019

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

    BugA bug in TypeScript
    Status: Open.
    #33439 In microsoft/TypeScript;
    · whzx5byb opened on Sep 15, 2019

  • Signature help not select correct overload for partially completed function

    Experience EnhancementNoncontroversial enhancements
    SuggestionAn idea for TypeScript
    Status: Open.
    #33328 In microsoft/TypeScript;
    · mjbvz opened on Sep 9, 2019

  • Add ElementInternals, attachInternals from HTML standard

    BugA bug in TypeScript
    Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScript
    Status: Open.
    #33218 In microsoft/TypeScript;
    · JanMiksovsky opened on Sep 3, 2019
    •