microsoft/TypeScript

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

Stars: 111k
Forks: 14.4k
Open beginner issues: 21
Indexed issues: 4.9k
Avg merge: 1d 19h
Merged PRs (30d): 117

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

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4,862 open issues indexed

Add support for `willDeleteFiles`/`didDeleteFiles` to tsserver Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#54986 · 4 reactions · Opened Jul 12, 2023
ctrl+click on an existing asset with a querystring Open

Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#54993 · 2 reactions · Opened Jul 12, 2023
TypeScript / JavaScript - IntelliSense - Improve JSDoc display for overloaded functions, including ones overloaded with `@overload` Open

Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#55056 · 11 reactions · Opened Jul 12, 2023
Need some way to propagate optional fields from `satisfies` to type it is used on Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#54976 · 1 reaction · Opened Jul 12, 2023
*explicit* type guard passed to Array.filter does not narrow type Open

Domain: check: Control Flow Help Wanted Possible Improvement

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

microsoft/TypeScript#54966 · 7 comments · 2 reactions · Opened Jul 11, 2023
error TS4058: Return type of exported function has or is using name '$SYM' from external module fileA but cannot be named Open

Domain: Declaration Emit Help Wanted Possible Improvement

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

microsoft/TypeScript#54964 · 1 comment · 4 reactions · Opened Jul 11, 2023
Improve type errors when applying a decorator to a member it does not support Open

Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#54963 · 6 reactions · Opened Jul 11, 2023
[PERFORMANCE]: TS takes several seconds to validate types resulting in poor DX Open

Needs More Info

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

microsoft/TypeScript#54939 · 3 comments · 2 reactions · Opened Jul 9, 2023
Enable `noExplicitAny` in `./tsconfig.json`. Open

Needs Proposal Suggestion

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

microsoft/TypeScript#54933 · 5 comments · Opened Jul 9, 2023
Module Resolution: imports with JSON assertion should not need flag when module is esnext Open

Needs Proposal Suggestion

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

microsoft/TypeScript#54929 · 7 comments · 1 reaction · Opened Jul 8, 2023
Numeric Range Types (Feature Update) Open

Feature Update Suggestion

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/TypeScript#54925 · 22 comments · 156 reactions · Opened Jul 7, 2023
Feature Updates Open

Feature Update

Difficulty 5/5 Over a week Newbie friendliness 15/100

microsoft/TypeScript#54923 · 7 comments · 50 reactions · Opened Jul 7, 2023
Error elaboration says nothing due to circularity Open

Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#54921 · Opened Jul 7, 2023
Type instantiation is excessively deep with tuple spread Open

Domain: Conditional Types Help Wanted Possible Improvement

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

microsoft/TypeScript#54910 · 2 comments · Opened Jul 7, 2023
getLeadingCommentRanges misses comment in call expression Open

Domain: Parser Help Wanted Possible Improvement

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

microsoft/TypeScript#54906 · 3 reactions · Opened Jul 7, 2023
REOPEN: Classes that extend other Classes are not properly parsed by the JS Editor Open

Needs More Info

Difficulty 4/5 3-5 days Newbie friendliness 38/100

microsoft/TypeScript#54953 · 6 comments · Opened Jul 6, 2023
jsdoc: escaped property names are not parsed properly Open

Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#54898 · 10 comments · 2 reactions · Opened Jul 6, 2023
Generic types should be compatible Open

Bug Domain: check: Variance Relationships Help Wanted

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

microsoft/TypeScript#54892 · 3 comments · 2 reactions · Opened Jul 5, 2023
extends causing string literal can't be used as index Open

Domain: Indexed Access Types Possible Improvement

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

microsoft/TypeScript#54886 · 6 comments · 1 reaction · Opened Jul 5, 2023
[FR] `"javascript/typescript.preferences.importModuleSpecifier": "no-relative-parent-imports"` Open

Awaiting More Feedback Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 38/100

microsoft/TypeScript#54955 · 1 comment · Opened Jul 5, 2023
Quick Info for `export { foo as default }` is displaying `export default` only Open

Domain: LS: Quick Info Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#54882 · 5 comments · Opened Jul 4, 2023
A function that returns a class with a property getter is unusable via a declaration file (TS2611) Open

Needs Investigation Rescheduled

microsoft/TypeScript#54879 · 6 comments · 4 reactions · 1 assignee · Opened Jul 4, 2023
TS4082 occurs when using `composite: true` Open

Needs More Info

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

microsoft/TypeScript#54878 · 3 comments · 2 reactions · Opened Jul 4, 2023
Intellisense for Symbol properties Open

Awaiting More Feedback Domain: LS: Completion Lists Suggestion

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

microsoft/TypeScript#54870 · 3 comments · 3 reactions · Opened Jul 3, 2023
resolve declaration extension assets as paths and directing users to the correct implementation Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 20/100

microsoft/TypeScript#54863 · 1 reaction · Opened Jul 3, 2023
TS:1379 An import alias cannot reference a declaration that was exported using 'export type' Open

Bug Domain: ES Modules Help Wanted

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

microsoft/TypeScript#54855 · 12 comments · 3 reactions · Opened Jul 1, 2023
Suggestion: ClassMethodDecoratorContext's name property could pick up Value["name"] Open

Needs More Info

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

microsoft/TypeScript#54850 · 2 comments · Opened Jul 1, 2023
Spread operator in JSX causes loss of type information for inline functions defined outside the spread operator Open

Bug Domain: JSX/TSX Help Wanted

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

microsoft/TypeScript#54841 · 3 comments · Opened Jun 30, 2023
Distinct type specification for public field members Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#54829 · 3 comments · Opened Jun 29, 2023
Dead code typecheck elimination Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#54826 · 5 comments · Opened Jun 29, 2023
Unsound calls allowed on a function coming from a deferred indexed access when intersection is involved Open

Domain: Indexed Access Types Help Wanted Possible Improvement

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

microsoft/TypeScript#54824 · Opened Jun 29, 2023
Should `lib` support `disposable`? Should `decorators` be merged with `esnext.decorators`? Open

Needs Investigation

microsoft/TypeScript#54822 · 1 comment · 1 assignee · Opened Jun 29, 2023
Version 5.0.4 -> 5.1.3 Regression when using generic types Open

Bug Domain: check: Type Inference Rescheduled

microsoft/TypeScript#54805 · 2 comments · 4 reactions · 1 assignee · Opened Jun 28, 2023
enum should not be able to used with math operators Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#54793 · 7 comments · 4 reactions · Opened Jun 27, 2023
Function's attached JSDoc is not preserved when using OmitThisParameter Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#54783 · 5 comments · 1 reaction · Opened Jun 26, 2023
Fails to expand indexed access type when used as a generic type parameter Open

Domain: Indexed Access Types Help Wanted Possible Improvement

Difficulty 4/5 3-5 days Newbie friendliness 40/100

microsoft/TypeScript#54776 · 1 comment · Opened Jun 26, 2023
Strange behavior of types while using nested mapped types and generics Open

Needs Investigation

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

microsoft/TypeScript#54775 · Opened Jun 26, 2023
Can't infer the type of this self-calculated Open

Needs Investigation

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

microsoft/TypeScript#54766 · Opened Jun 25, 2023
Cannot use ".d.ts" file on non-relative import with `rootDirs` and `baseUrl` Open

Needs Investigation Rescheduled

microsoft/TypeScript#54749 · 1 assignee · Opened Jun 23, 2023
Allow subclasses to declare overloads of methods Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#54747 · 1 comment · Opened Jun 23, 2023
.js error when module type is CommonJS and a variable name is exports Open

Bug Domain: JS Emit Help Wanted

Difficulty 3/5 1-2 days Newbie friendliness 38/100

microsoft/TypeScript#54738 · 1 comment · Opened Jun 22, 2023
Provide support for comma insertion with snippet completion Open

Domain: LS: Completion Lists Rescheduled Suggestion

microsoft/TypeScript#54731 · 2 reactions · 1 assignee · Opened Jun 21, 2023
'this' implicitly has type 'any' in a function used within a conditional expression Open

Bug Domain: This-Typing Help Wanted

Difficulty 4/5 3-5 days Newbie friendliness 40/100

microsoft/TypeScript#54723 · 1 comment · 1 reaction · Opened Jun 21, 2023
Preserve properties descriptions when converting @typedef's to interfaces Open

Experience Enhancement Help Wanted Suggestion

Difficulty 3/5 1-2 days Newbie friendliness 55/100

microsoft/TypeScript#54716 · 1 reaction · Opened Jun 20, 2023
jsdoc: Picks up @errors comment inside a code snippet inside jsdoc as a tag Open

Domain: JSDoc Help Wanted Possible Improvement

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

microsoft/TypeScript#54709 · Opened Jun 19, 2023
Generics are lost during `Function.prototype.bind()` and `Function.prototype.call()` Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#54707 · 4 comments · 13 reactions · Opened Jun 19, 2023
Component not always a valid JSX component depending on a generic type Open

Domain: JSX/TSX Help Wanted Possible Improvement

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

microsoft/TypeScript#54702 · 2 comments · Opened Jun 19, 2023
Find all references on super() only shows other calls to `super()`, not all calls to ctor Open

Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#54711 · 5 comments · Opened Jun 15, 2023
Decorated function parameter types are not inferred Open

Needs Investigation

microsoft/TypeScript#54652 · 2 comments · 10 reactions · 1 assignee · Opened Jun 15, 2023
Autoimport: Prefer Secondary Entrypoint Open

Awaiting More Feedback Domain: LS: Auto-import Suggestion

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

microsoft/TypeScript#54643 · Opened Jun 14, 2023

microsoft/TypeScript

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