Issues

• Add a new type Tuple<3, T> = [T, T, T]

  DeclinedSuggestion
  microsoft/TypeScript#54740 · by Filter by author chwoerz was closed on Jun 22, 2023
  5

• Remove missing type from tuple type arguments under exactOptionalPropertyTypes

  For Backlog Bug
  Unread
  microsoft/TypeScript#54718·by Andarist was closed Mar 24, 2026
  26

  

• Fixed parenthesized array literal expressions spread in calls not being tupleized

  For Uncommitted Bug
  Unread
  microsoft/TypeScript#54623·by Andarist was merged Jun 29, 2023
  4

  

• Mapped Type [Lhs of Rhs] Syntax for Array and Tuple Types

  In DiscussionSuggestion
  microsoft/TypeScript#54575 · Filter by author NonSpicyBurrito opened on Jun 8, 2023
  2

• (...args: never) => void signature throws an error in TS 5.1

  Duplicate
  microsoft/TypeScript#54543 · by Filter by author anthonyma94 was closed on Jun 9, 2023
  3

• 5.1 regression: constraints of generic tuple types are sometimes order-sensitive

  Fix AvailableNeeds More Info
  microsoft/TypeScript#54495 · by Filter by author alecgibson was closed on Jun 13, 2023 · TypeScript 5.1.6
  13

  

• TS 5.1.3 Regression: TSC Compiler throws FATAL ERROR: Reached heap limit Allocation failed

  BugCrashFix AvailableRecent Regression
  microsoft/TypeScript#54491 · by Filter by author virtuallyunknown was closed on Jun 13, 2023 · TypeScript 5.1.6
  10

  

• PSA: potential lib breaking change after iterator-helpers proposal

  Awaiting More FeedbackSuggestion
  microsoft/TypeScript#54481 · by Filter by author Josh-Cena was closed on Jul 19, 2024
  17

• Omitting a property from tuple breaks destruction

  BugDomain: Mapped TypesHelp Wanted
  microsoft/TypeScript#54371 · Filter by author so1ve opened on May 24, 2023 · Backlog
  17

• A minimal custom transformer plugin proposal

  Fix AvailableIn DiscussionRescheduledSuggestion
  microsoft/TypeScript#54276 · by Filter by author jakebailey was closed on Mar 11, 2025 · Backlog
  84

  

• Named/keyed type parameters

  In DiscussionSuggestion
  microsoft/TypeScript#54254 · Filter by author Andarist opened on May 15, 2023
  21

• Comparing a tuple input to a variadic tuple no longer narrows it

  BugFix Available
  microsoft/TypeScript#54048 · by Filter by author ssalbdivad was closed on Jun 27, 2023 · TypeScript 5.2.0
  2

• Improve inference for context sensitive functions within reverse mapped types

  For Backlog Bug
  Unread
  microsoft/TypeScript#54029·by Andarist was closed Mar 24, 2026
  23

  

• Expected tuple type as function return value is not infered from written code

  Working as Intended
  microsoft/TypeScript#53911 · by Filter by author jonathanfady was closed on Apr 23, 2023
  8

• Contextual typing for more function return values

  microsoft/TypeScript#53701 · by Filter by author ethanresnick was closed on Apr 8, 2023
  2

• Constraints for generic tuple types

  Author: TeamFor Milestone Bug
  Unread
  microsoft/TypeScript#53672·by ahejlsberg was merged May 2, 2023
  44

  

• Read-only tuple or Set has wrong types in typescript/lib/lib.es2016.array.include.d.ts

  Duplicate
  microsoft/TypeScript#53584 · by Filter by author alesmenzel was closed on Apr 2, 2023
  4

• Add fallback logic for generating signatures for unions of array members

  Author: TeamFor Uncommitted Bug
  Unread
  microsoft/TypeScript#53489·by weswigham was merged May 16, 2023
  37

  

• Isolated declarations

  For Uncommitted Bug
  Unread
  microsoft/TypeScript#53463·by dragomirtitian was closed Mar 18, 2024
  241

  

• ...args should not be readonly within function body

  Experience EnhancementSuggestion
  microsoft/TypeScript#53398 · Filter by author jakebailey opened on Mar 20, 2023 · Backlog
  6

• Array type gets inferred incorrectly

  Working as Intended
  microsoft/TypeScript#53380 · by Filter by author tippfelher was closed on Mar 20, 2023
  1

• Allowed tuples to have both named and anonymous members

  Breaking ChangeFor Backlog Bug
  Unread
  microsoft/TypeScript#53356·by JoshuaKGoldberg was merged Jun 26, 2023
  63

  

• The intersection of a tuple with an unrelated array is handled inconsistently

  Experimentation NeededSuggestion
  microsoft/TypeScript#53355 · Filter by author geoffreytools opened on Mar 19, 2023 · Backlog
  13

• Revert PR #52589

  Author: TeamFor Uncommitted Bug
  Unread
  microsoft/TypeScript#53280·by jakebailey was merged Mar 16, 2023
  14

  

• Ensure rest type for source parameter is readonly in relations

  Author: TeamFor Milestone Bug
  Unread
  microsoft/TypeScript#53258·by jakebailey was merged Mar 20, 2023
  24