Issues

• Tuple Spread Inconsistencies When Intersected

  BugDomain: IntersectionHelp Wanted
  microsoft/TypeScript#60539 · Filter by author LukeAbby opened on Nov 19, 2024 · Backlog
  1

• Add NonEmptyArray to lib (but **not** length > 0 narrowing)

  Awaiting More FeedbackSuggestion
  microsoft/TypeScript#60491 · Filter by author Rudxain opened on Nov 12, 2024
  6

• [...T[], T] does not extend [T, ...T[]]

  Domain: check: Type InferenceHelp WantedPossible Improvement
  microsoft/TypeScript#60463 · Filter by author geoffreytools opened on Nov 9, 2024 · Backlog
  4

• Fix #55632 issue (No type inferrence of callback arguments inside a tuple union type)

  For Backlog Bug
  Unread
  microsoft/TypeScript#60434·by fwolff was closed Mar 24, 2026
  42

• Regression Bug: Error "The type of this node cannot be serialized because its property '[fooSymbol]' cannot be serialized." happens but potentially avoidable automatically.

  Needs Investigation
  microsoft/TypeScript#60114 · Filter by author LumaKernel opened on Oct 2, 2024 · TypeScript 5.7.0
  2

  

• Add numeric constraints to type parameters of mapped types with array/tuple intersections constraints

  For Uncommitted Bug
  Unread
  microsoft/TypeScript#60084·by Andarist was closed Mar 24, 2026
  13

• Request: An alternative type syntax that better resembles TS code

  Duplicate
  microsoft/TypeScript#60067 · by Filter by author SephReed was closed on Sep 29, 2024
  2

• Only pad initializer types for parameters without annotations and contextual signatures

  For Backlog Bug
  Unread
  microsoft/TypeScript#59975·by Andarist was closed Sep 27, 2024
  17

• Pad object literal types with implicit anys based on binding pattern elements

  For Uncommitted Bug
  Unread
  microsoft/TypeScript#59924·by Andarist was closed Sep 27, 2024
  24

  

• Distribute mapped types over intersections with some array/tuple members

  For Backlog Bug
  Unread
  microsoft/TypeScript#59864·by Andarist was closed Mar 24, 2026
  1

• Error type on spreading array with additional props

  BugDomain: IntersectionHelp Wanted
  microsoft/TypeScript#59849 · Filter by author ssalbdivad opened on Sep 4, 2024 · Backlog
  1

• Type discrimination bug with string literal tuple.

  Duplicate
  microsoft/TypeScript#59785 · by Filter by author gyurielf was closed on Sep 1, 2024
  4

• Inconsistent function argument type inference based on result assignment way

  microsoft/TypeScript#59781 · by Filter by author AjiTae was closed on Aug 28, 2024
  3

• Intellisense doesn't show type info about array index access on hover

  Duplicate
  microsoft/TypeScript#59696 · by Filter by author lionel-rowe was closed on Aug 23, 2024
  2

• Fix Callback argument type not inferred for union of interfaces #59309

  For Backlog Bug
  Unread
  microsoft/TypeScript#59672·by MichalMarsalek was closed Mar 24, 2026
  25

• TupleGenerator

  For Uncommitted Bug
  Unread
  microsoft/TypeScript#59627·by zojize was closed Mar 24, 2026
  2

• Inconsistent type validation: Different result depending on inline defined and executed function and declared and executed function

  Question
  microsoft/TypeScript#59560 · by Filter by author medikoo was closed on Aug 12, 2024
  17

• string not assignable to Record with specific number key

  Not a Defect
  microsoft/TypeScript#59489 · by Filter by author camsteffen was closed on Aug 5, 2024
  10

• Literal Tuples/'as const' - allow lib creator to mark type parameters as 'as const' to allow for better TS DSLs

  Fixed
  microsoft/TypeScript#59380 · by Filter by author jkavalec was closed on Jul 26, 2024
  2

• Mapped types over subclassed arrays behave strangely

  Needs Investigation
  microsoft/TypeScript#59260 · Filter by author Andarist opened on Jul 12, 2024
  1

  

• Filter with a type guard fails to narrow when the type guard's predicate is a tuple supertype

  Not a Defect
  microsoft/TypeScript#59054 · by Filter by author RobertSandiford was closed on Jul 12, 2024
  4

• Derive tuple labels for rest elements from array binding patterns

  Author: TeamFor Backlog Bug
  Unread
  microsoft/TypeScript#59045·by rbuckton was merged Jul 17, 2024
  8

  

• Get another function's parameter types for use in another function's rest parameter

  microsoft/TypeScript#58991 · by Filter by author STofone was closed on Jun 24, 2024
  5

• Design Meeting Notes, 6/7/2024

  Design Notes
  microsoft/TypeScript#58804 · by Filter by author DanielRosenwasser was closed on Nov 5, 2025
  6

• Feature Request: Display JSDoc Array of Objects as Array

  Awaiting More FeedbackSuggestion
  microsoft/TypeScript#58901 · Filter by author agbrettpittman opened on Jun 5, 2024
  4