Issues · microsoft/TypeScript

Find all references on `from` of a default import drops results after an unsaved edit in another file

microsoft/TypeScript#64497 · opened

on Sep 28, 2026

· Backlog

1

Incorrect/unhelpful error message for non-module jsx file

microsoft/TypeScript#64438 · opened

on Sep 24, 2026

3

The `options` arg of `Temporal.ZonedDateTime.prototype.toLocaleString()` currently accepts "illegal" option `timeZone`

microsoft/TypeScript#64227 · opened

on Sep 10, 2026

· Backlog

1

`importHelpers` incorrectly requires `tslib` for native `#private` class members at every dated `target` (ES2022–ES2025), even though no helper is ever emitted

microsoft/TypeScript#63728 · opened

on Aug 6, 2026

· Backlog

3

Type narrowing not working correctly with Uppercase<string> & Lowercase<string>

microsoft/TypeScript#63724 · opened

on Aug 6, 2026

· Backlog

8

`Array.prototype.at` docs use "code unit" instead of "item"

microsoft/TypeScript#63722 · opened

on Aug 5, 2026

· Backlog

4

Should not allow `import.defer?.('x')`

microsoft/TypeScript#63679 · opened

on Jul 25, 2026

· Backlog

4

DOM: `Element#matches()` incorrectly narrows types

microsoft/TypeScript#63497 · opened

on May 20, 2026

· Backlog

14

Add type definition for Math.sumPrecise (ES2025 / TC39 proposal)

microsoft/TypeScript#63427 · opened

on Apr 23, 2026

· Backlog

8

Corsa differences in `export=` module augmentation

microsoft/TypeScript#63814 · opened

on Apr 21, 2026

8

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

microsoft/TypeScript#63206 · opened

on Mar 2, 2026

· Dormant

13

Intellisense keeps crashing

microsoft/TypeScript#63151 · opened

on Feb 17, 2026

· Backlog

25

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

microsoft/TypeScript#63050 · opened

on Jan 25, 2026

· Dormant

3

Regression: Generic function returning union of tuples is not assignable to identical type since v4.2

microsoft/TypeScript#63019 · opened

on Jan 20, 2026

· Backlog

5

Crash： when inferring from a tuple with middle rest elements and trailing variadic elements

microsoft/TypeScript#63005 · opened

on Jan 17, 2026

· Backlog

1

JSDoc comments for async_hooks are confusing/misleading

microsoft/TypeScript#62967 · opened

on Jan 9, 2026

· Backlog

2

Crash: RangeError: Maximum call stack size exceeded during contextual typing of object literal with yield in computed property name

microsoft/TypeScript#62941 · opened

on Jan 1, 2026

· Backlog

1

Document that compiler.extends can be an array

microsoft/TypeScript#62915 · opened

on Dec 20, 2025

· Backlog

4

Using declarations like a statement leads to strange bugs.

microsoft/TypeScript#62896 · opened

on Dec 14, 2025

· Dormant

7

ES `ClassDecoratorContext.name` has incorrect value with static `name`

microsoft/TypeScript#62870 · opened

on Dec 9, 2025

· Backlog

2

`__setFunctionName` breaks custom static `name` on classes

microsoft/TypeScript#62854 · opened

on Dec 8, 2025

· Backlog

2

`silentNeverType` leak through return type inference

microsoft/TypeScript#62824 · opened

on Dec 2, 2025

· Backlog

2

Spread operator fails to distribute over union when recursive type call is inlined instead of aliased

microsoft/TypeScript#62812 · opened

on Nov 27, 2025

· Backlog

1

Type parameter leak caused by `this` and reverse mapped type

microsoft/TypeScript#62779 · opened

on Nov 18, 2025

· Backlog

1

"Lookup" Type Broken When Using Generics

microsoft/TypeScript#62770 · opened

on Nov 17, 2025

· Backlog

3

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Find all references on `from` of a default import drops results after an unsaved edit in another file

Incorrect/unhelpful error message for non-module jsx file

The `options` arg of `Temporal.ZonedDateTime.prototype.toLocaleString()` currently accepts "illegal" option `timeZone`

`importHelpers` incorrectly requires `tslib` for native `#private` class members at every dated `target` (ES2022–ES2025), even though no helper is ever emitted

Type narrowing not working correctly with Uppercase<string> & Lowercase<string>

`Array.prototype.at` docs use "code unit" instead of "item"

Should not allow `import.defer?.('x')`

DOM: `Element#matches()` incorrectly narrows types

Add type definition for Math.sumPrecise (ES2025 / TC39 proposal)

Corsa differences in `export=` module augmentation

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

Intellisense keeps crashing

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

Regression: Generic function returning union of tuples is not assignable to identical type since v4.2

Crash： when inferring from a tuple with middle rest elements and trailing variadic elements

JSDoc comments for async_hooks are confusing/misleading

Crash: RangeError: Maximum call stack size exceeded during contextual typing of object literal with yield in computed property name

Document that compiler.extends can be an array

Using declarations like a statement leads to strange bugs.

ES `ClassDecoratorContext.name` has incorrect value with static `name`

`__setFunctionName` breaks custom static `name` on classes

`silentNeverType` leak through return type inference

Spread operator fails to distribute over union when recursive type call is inlined instead of aliased

Type parameter leak caused by `this` and reverse mapped type

"Lookup" Type Broken When Using Generics