Issues

• jsx: react-jsxdev passes this to jsxDEV before super() returns

  Bug
  microsoft/TypeScript#65415 · Filter by author trackoor opened on Nov 9, 2026 · Dormant

• Format Document is not idempotent when a line break moves a token that enclosing nodes start at

  Bug
  microsoft/TypeScript#65000 · Filter by author roninjin10 opened on Oct 28, 2026 · Dormant

• Type argument with a subset of the parameter constraint's optional keys incorrectly reported as unassignable to constraint

  BugDomain: Mapped Types
  microsoft/TypeScript#63725 · Filter by author aweebit opened on Aug 6, 2026 · Dormant
  3

• Property lookups on arguments to type parameters constrained by string index signatures can violate other constraints because undefined is included for optional properties

  Cursed?Domain: Indexed Access TypesPossible Improvement
  microsoft/TypeScript#63709 · Filter by author aweebit opened on Aug 2, 2026 · Dormant
  3

• Incorrect type resolution with nested constructors

  BugDomain: classes
  microsoft/TypeScript#63559 · Filter by author Mudloop opened on Jun 16, 2026 · Dormant

• new super() in static method does not cause error

  BugDomain: classes
  microsoft/TypeScript#63451 · Filter by author Withered-Flower-0422 opened on Apr 30, 2026 · Dormant
  4

• The module namespace object returned by __importStar is not the same when import the same module multiple times

  BugDomain: JS Emit
  microsoft/TypeScript#63391 · Filter by author yanjiew1 opened on Apr 12, 2026 · Dormant
  2

• Inside a generic function with a remapped type as parameter, elements are wrongfully inferred as {}.

  Needs Investigation
  microsoft/TypeScript#63363 · Filter by author denis-migdal opened on Apr 6, 2026 · Dormant
  4

• Error on function return is less useful than it should be

  Domain: check: Contextual TypesPossible Improvement
  microsoft/TypeScript#63357 · Filter by author pfgithub opened on Apr 5, 2026 · Dormant
  1

• Confusing error message (2322), should use (2741) and (2322) error message when this["XXX"] = {...} has a missing (or mispelled) key or an incompatible value.

  BugDomain: Error Messages
  microsoft/TypeScript#63206 · Filter by author denis-migdal opened on Mar 2, 2026 · Dormant
  13

• Double error message when referencing variable of type union of string literals from ambient declaration

  Domain: Error MessagesPossible Improvement
  microsoft/TypeScript#63050 · Filter by author devanshj opened on Jan 25, 2026 · Dormant
  3

• Using declarations like a statement leads to strange bugs.

  BugDomain: check: Control Flow
  microsoft/TypeScript#62896 · Filter by author olegdunkan opened on Dec 14, 2025 · Dormant
  7

• Regression in generic inference with JSX in v5.7+

  Domain: JSX/TSXPossible Improvement
  microsoft/TypeScript#62140 · Filter by author pikax opened on Jul 28, 2025 · Dormant
  1

• Incorrect Chinese Translation for 'initializer' and Incorrect Use of Chinese Quotation Marks

  BugDomain: Something Else
  microsoft/TypeScript#58130 · Filter by author cheezone opened on Apr 9, 2024 · Dormant

• Double slash comment // will be wrongly removed in the trailing position of the object attribute

  Domain: Comment EmitPossible Improvement
  microsoft/TypeScript#56055 · Filter by author Azurewarth0920 opened on Oct 10, 2023 · Dormant
  2

• Enum value 1 / 0 incorrectly transformed if there is Infinity declared in scope

  BugDomain: enum
  microsoft/TypeScript#55091 · Filter by author nicolo-ribaudo opened on Jul 20, 2023 · Dormant
  3

• Source Map includes mapping for line ending characters

  BugDomain: Source Maps
  microsoft/TypeScript#34695 · Filter by author ashi009 opened on Oct 24, 2019 · Dormant
  1

• Incorrect union type inference for conjunction with strictNullChecks disabled

  BugDomain: check: Type Inference
  microsoft/TypeScript#31789 · Filter by author pedro-pedrosa opened on Jun 6, 2019 · Dormant
  3