microsoft/TypeScript

View on GitHub

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

Stars: 111k
Forks: 14.3k
Open beginner issues: 18
Indexed issues: 4.9k
Avg merge: 2d 4h
Merged PRs (30d): 132

Dominant language: Go
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

Open All

4,857 open issues indexed

Allow `interface extends object` syntax Open

In Discussion Suggestion

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/TypeScript#60730 · 2 comments · 3 reactions · Opened Dec 10, 2024
[exactOptionalPropertyTypes] Unexpected 'undefined' arises in error message Open

Bug Domain: flag: exactOptionalPropertyTypes Help Wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60712 · 1 comment · Opened Dec 7, 2024
satisfies operator shadows object this with interface this Open

Needs More Info

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/TypeScript#60711 · 2 comments · Opened Dec 7, 2024
Error span incorrect when `this` constraint on member function fails Open

Domain: Related Error Spans Help Wanted Possible Improvement

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/TypeScript#60709 · Opened Dec 7, 2024
Writes to indexed access of an index signature are not sufficiently constrained Open

Experimentation Needed Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60703 · 5 comments · Opened Dec 6, 2024
Discriminating property with never as possible type makes its enclosing object type disappear when narrowing Open

In Discussion Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/TypeScript#60702 · 10 comments · Opened Dec 6, 2024
[bug] declaration files have invalid class member generics with mixin & multiple layer inheritance Open

Bug Domain: Declaration Emit

microsoft/TypeScript#60697 · 1 assignee · Opened Dec 6, 2024
Mixin constructor not working with `args:unknown[]`, only with `args:any[]` Open

Awaiting More Feedback Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 42/100

microsoft/TypeScript#60694 · 2 comments · Opened Dec 5, 2024
Inconsistent narrowing of adjacently tagged unions Open

Experimentation Needed Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 42/100

microsoft/TypeScript#60685 · 1 comment · 2 reactions · Opened Dec 4, 2024
Incorrect error attribution on indexed access, when using object spread operator Open

Domain: Indexed Access Types Help Wanted Possible Improvement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60675 · 5 comments · Opened Dec 4, 2024
Support declaring multiple setter overloads Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/TypeScript#60664 · 2 comments · 1 reaction · Opened Dec 3, 2024
should error on assignment that shadows a prototype method Open

Awaiting More Feedback Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/TypeScript#60649 · 2 comments · 3 reactions · Opened Dec 1, 2024
Generic function with function as argument autocomplete broken, unless generic argument of the argument function is it's first argument Open

Experience Enhancement Help Wanted Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60648 · 1 comment · Opened Dec 1, 2024
Flattening types in generated .d.ts files for libraries Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/TypeScript#60647 · 2 comments · Opened Dec 1, 2024
`CredentialsContainer.create()` & `.get()` should be able to return `PublicKeyCredential`, and the PKC interface should be more well-defined Open

Domain: lib.d.ts Experience Enhancement Help Wanted Suggestion

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/TypeScript#60641 · 5 reactions · Opened Nov 29, 2024
Start getting types error after update to v5.7.2 Open

Needs More Info

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60634 · 3 comments · 2 reactions · Opened Nov 28, 2024
Enable Type Checking for Custom File Extensions Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 35/100

microsoft/TypeScript#60632 · 2 comments · 2 reactions · Opened Nov 28, 2024
Some Playwright types now reported as `any` after upgrading to 5.7.2 Open

Domain: check: Type Inference Help Wanted Possible Improvement

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/TypeScript#60619 · 4 comments · Opened Nov 26, 2024
Bloomberg feedback for 5.7 Open

Discussion

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/TypeScript#60611 · 1 reaction · Opened Nov 26, 2024
Javascript function type inference breaks across a property accessor but not a function call Open

Experience Enhancement Help Wanted Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60600 · 1 comment · Opened Nov 25, 2024
rewriteRelativeImportExtensions does not rewrite the extension for an import expressions unless the file is detected to be a module Open

Needs Investigation

microsoft/TypeScript#60599 · 6 comments · 1 assignee · Opened Nov 25, 2024
Dynamically importing JSON should require import attribute with node16/nodenext Open

Needs Investigation

microsoft/TypeScript#60598 · 1 comment · 1 assignee · Opened Nov 25, 2024
Static Index Signature with Generics Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/TypeScript#60587 · 1 comment · Opened Nov 25, 2024
Misleading error message "'{}' and 'number' have no overlap" Open

Needs Proposal Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/TypeScript#60583 · 2 comments · 1 reaction · Opened Nov 25, 2024
Rethinking relationships between `{}` type, `object`, and primitives Open

Needs Proposal Suggestion

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/TypeScript#60582 · 17 comments · 10 reactions · Opened Nov 25, 2024
Type Instantiation is Excessively Deep Error Regression in #37348 Open

Bug Domain: check: Type Circularity Help Wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60567 · 1 reaction · Opened Nov 23, 2024
Improve call expression source maps Open

Bug Domain: Source Maps Help Wanted

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/TypeScript#60565 · Opened Nov 22, 2024
Missing `Go to definition` links when accessing properties after `jsdoc` typecast Open

Experience Enhancement Help Wanted Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/TypeScript#60562 · Opened Nov 22, 2024
Generic function passed to generic function inferred correctly only with spread Open

Domain: check: Type Inference Help Wanted Possible Improvement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/TypeScript#60552 · 1 comment · Opened Nov 21, 2024
MIDIMessageEvent data is incorrectly typed Open

Bug Domain: lib.d.ts Help Wanted Needs Human Review

microsoft/TypeScript#60546 · 2 comments · 2 reactions · 2 assignees · Opened Nov 20, 2024
NoInfer not working on callback parameter destructuring Open

Domain: check: Type Inference Help Wanted Possible Improvement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

microsoft/TypeScript#60544 · 16 comments · Opened Nov 20, 2024
Tuple Spread Inconsistencies When Intersected Open

Bug Domain: Intersection Help Wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60539 · 1 comment · Opened Nov 19, 2024
MSBuild integration with ASP.NET Core Open

Needs Investigation

microsoft/TypeScript#60538 · 8 comments · 27 reactions · 1 assignee · Opened Nov 19, 2024
Non-null assertion operator whitespace allowances can create confusing conditional statements Open

Experience Enhancement Help Wanted Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60518 · 2 comments · 2 reactions · Opened Nov 16, 2024
Missing Boolean.toString definition and loose valueOf definition Open

Awaiting More Feedback Suggestion

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

microsoft/TypeScript#60517 · 3 comments · 6 reactions · Opened Nov 16, 2024
Computing buildInfoTime even when !isIncremental Open

Domain: tsc: --incremental Help Wanted Possible Improvement

Difficulty 3/5 1-2 days Newbie friendliness 42/100

microsoft/TypeScript#60500 · 3 comments · 1 reaction · Opened Nov 14, 2024
Add `NonEmptyArray` to `lib` (but **not** `length > 0` narrowing) Open

Awaiting More Feedback Suggestion

Difficulty 3/5 1-2 days Newbie friendliness 45/100

microsoft/TypeScript#60491 · 6 comments · Opened Nov 12, 2024
NuGet packages not available for pre-release versions of 5.7 Open

Needs Investigation

microsoft/TypeScript#60489 · 4 comments · 1 assignee · Opened Nov 12, 2024
`types-registry` keeps installing every time VS Code starts even if explicitly disabled Open

Needs Investigation

microsoft/TypeScript#60487 · 3 comments · 1 assignee · Opened Nov 12, 2024
Change the behavior of `tsc` on a tsconfig solution Open

In Discussion Suggestion

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/TypeScript#60479 · 11 comments · 2 reactions · Opened Nov 11, 2024
slow paste with spinner Open

Needs Investigation

microsoft/TypeScript#60485 · 3 comments · 1 assignee · Opened Nov 11, 2024
"Referenced projects must have the new composite setting enabled" does not hold true Open

Docs

Difficulty 3/5 1-2 days Newbie friendliness 35/100

microsoft/TypeScript#60465 · 5 comments · 3 reactions · Opened Nov 10, 2024
`[...T[], T]` does not extend `[T, ...T[]]` Open

Domain: check: Type Inference Help Wanted Possible Improvement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60463 · 4 comments · 4 reactions · Opened Nov 9, 2024
moduleResolution Bundler and importModuleSpecifierEnding Open

Needs Investigation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60478 · 2 comments · 5 reactions · Opened Nov 9, 2024
Error: TypeError: Cannot read properties of undefined (reading 'kind') Open

Needs More Info

Difficulty 4/5 3-5 days Newbie friendliness 25/100

microsoft/TypeScript#60457 · 2 comments · 1 reaction · Opened Nov 8, 2024
Proposal: Enhance String interface definition to support type inference for string literals Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 25/100

microsoft/TypeScript#60456 · 3 comments · Opened Nov 8, 2024
Error not generated for nested generic array Open

Bug Domain: check: Variance Relationships Help Wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

microsoft/TypeScript#60453 · 2 comments · Opened Nov 7, 2024
Type Inference Fails with Generic Types Open

Needs More Info

Difficulty 5/5 Over a week Newbie friendliness 30/100

microsoft/TypeScript#60447 · 5 comments · 1 reaction · Opened Nov 7, 2024
No file ending when adding import Open

Needs Investigation

microsoft/TypeScript#60451 · 2 comments · 2 reactions · 1 assignee · Opened Nov 7, 2024
Ukrainian localisation Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 32/100

microsoft/TypeScript#60444 · 3 comments · 23 reactions · Opened Nov 6, 2024

microsoft/TypeScript

Get new issues in your inbox