Issues

• PoC for #36165 'inherit' keyword

  For Uncommitted Bug
  Unread
  microsoft/TypeScript#64811·tadhgmister opened Oct 14, 2026 · Updated Oct 14, 2026·Draft
  1

• 1 | 2 | 3 can be assigned to 1 | 2 when using a recursive type

  Design Limitation
  microsoft/TypeScript#63454 · by Filter by author carljohnsonnewhampshire-hue was closed on May 6, 2026
  13

• Hover display for non-homomorphic mapped types renders numeric-string keys indistinguishably from numeric keys

  Experimentation NeededSuggestion
  microsoft/TypeScript#63425 · Filter by author codpro2005 opened on Apr 23, 2026 · Backlog
  6

• Improve tracking of deeply nested object types

  Author: TeamFor Uncommitted Bug
  Unread
  microsoft/TypeScript#63415·by ahejlsberg was closed Aug 25, 2026
  34

  

• Unsafe array mutation allowed by loose generic constraints in item-creator functions

  Duplicate
  microsoft/TypeScript#62666 · by Filter by author SimonSimCity was closed on Oct 31, 2025
  10

• Typescript Type Resolution Fails with generics of T | null

  7.0 LS MigrationDomain: LS: Type DisplayHelp WantedPossible Improvement
  microsoft/TypeScript#62608 · by Filter by author adminnz was closed on Dec 3, 2025 · Backlog
  3

• Revert ts5.9 changes for Uint8Array

  Docs
  microsoft/TypeScript#62240 · Filter by author paulmillr opened on Aug 9, 2025
  39

• Comparing arrays doesn't give any error

  Awaiting More FeedbackSuggestion
  microsoft/TypeScript#61889 · Filter by author DonaldDuck313 opened on Jun 18, 2025
  4

• Overriding type of union works as declared type but not as generic type

  Design Limitation
  microsoft/TypeScript#61729 · by Filter by author SimonSimCity was closed on May 22, 2025
  3

• Recursive Type Field Validation + Suggest, compile, fail over, Improve Transform of Circular Types Generic type hint Circular<type>

  Question
  microsoft/TypeScript#61685 · by Filter by author wesleyolis was closed on May 15, 2025
  2

• Error: Debug Failure. No error for last overload signature

  BugDomain: check: Variance RelationshipsHelp Wanted
  microsoft/TypeScript#61524 · Filter by author jens-duttke opened on Apr 3, 2025 · Backlog
  6

• Declaration merging can break equality tests for named tuples

  Not a Defect
  microsoft/TypeScript#61162 · by Filter by author LukeAbby was closed on Feb 15, 2025
  12

• Incomplete inference of generic union type over array

  Duplicate
  microsoft/TypeScript#60893 · by Filter by author adriantrunzo was closed on Jan 5, 2025
  3

• Declaration file not working

  Question
  microsoft/TypeScript#60670 · by Filter by author dpwzone was closed on Dec 3, 2024
  36

• Typed Function for better class inheritance.

  microsoft/TypeScript#60596 · by Filter by author Byloth was closed on Nov 26, 2024
  7

• Loosen strictness of Array.prototype.includes() and Set.prototype.has()

  microsoft/TypeScript#60559 · by Filter by author sod was closed on Nov 22, 2024
  7

• Set.has() should accept any value, and could be a type predicate

  Duplicate
  microsoft/TypeScript#60547 · by Filter by author jthemphill was closed on Nov 26, 2024
  8

• TypeScript Compiler compiles Generic ArrowFunction into a TsxElement

  Working as Intended
  microsoft/TypeScript#60474 · by Filter by author Densyakun was closed on Nov 15, 2024
  2

• TypeScript Extensions Proposal

  microsoft/TypeScript#60421 · by Filter by author shlyk was closed on Nov 5, 2024
  1

• Array.isArray() : a possible fix ? + discussion on type guards (frozen keyword + better type deduction)

  Awaiting More FeedbackSuggestion
  microsoft/TypeScript#60177 · Filter by author denis-migdal opened on Oct 9, 2024
  2

• Type inference when using extend in a generic is not consistent

  Question
  microsoft/TypeScript#59993 · by Filter by author ShacharHarshuv was closed on Sep 21, 2024
  3

• Google feedback on TS 5.6-beta

  Discussion
  microsoft/TypeScript#59733 · Filter by author trevorade opened on Aug 23, 2024
  5

• lib.es5.d.ts: Default ArrayConstructor generic parameter to undefined

  DeclinedSuggestion
  microsoft/TypeScript#59379 · by Filter by author karlhorky was closed on Aug 1, 2024
  5

• Allow satisfies keyof assertions in computed property names

  Author: TeamFor Uncommitted Bug
  Unread
  microsoft/TypeScript#58829·by weswigham was closed Mar 24, 2026
  7

  

• Inline type annotations for destructured properties using angle bracket syntax

  microsoft/TypeScript#58633 · by Filter by author Not-Jayden was closed on May 23, 2024
  3