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: 18
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

Beginner friendly Everything

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4,855 open issues indexed

GeneratorFunction should not be newable Open

Needs Investigation

microsoft/TypeScript#56645 · 1 reaction · 1 assignee · Opened Dec 2, 2023
Vanilla JS: Mixins break inherited type hints Open

Domain: LS: Quick Info Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#56663 · Opened Dec 1, 2023
JSDocs don't support properties on functions Open

Bug Domain: JSDoc Experience Enhancement

microsoft/TypeScript#56615 · 12 comments · 2 reactions · 1 assignee · Opened Nov 30, 2023
Can you provide a configuration in tsconfig that prohibits throwing not Error subtypes Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56596 · 1 comment · Opened Nov 29, 2023
MediaStream API should support pan, zoom and tilt Open

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

microsoft/TypeScript#56589 · 5 comments · 1 reaction · 2 assignees · Opened Nov 29, 2023
Cannot assign readonly statics in static blocks Open

Needs Investigation

microsoft/TypeScript#56584 · 4 comments · 1 reaction · 1 assignee · Opened Nov 29, 2023
code fence indentation inside JSDoc is removed Open

Bug Domain: Comment Emit Help Wanted

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

microsoft/TypeScript#56583 · 3 comments · 1 reaction · Opened Nov 29, 2023
Allow merging enums with undefined Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56579 · 2 reactions · Opened Nov 28, 2023
array filter/find has inconsistent results and incorrect constraint specifications Open

Domain: check: Type Inference Possible Improvement

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

microsoft/TypeScript#56572 · 2 comments · Opened Nov 28, 2023
Named function arguments not supported in JSDOC Open

In Discussion Suggestion

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

microsoft/TypeScript#56574 · 7 comments · Opened Nov 27, 2023
Semantic highlighting: Non-explicit readonly properties not shown as such Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56563 · 2 reactions · Opened Nov 27, 2023
Update Twitter to X in README Open

Awaiting More Feedback Docs

microsoft/TypeScript#56546 · 4 comments · 5 reactions · 1 assignee · Opened Nov 26, 2023
New inlay hint implementation after v5.3 can appear too long Open

Needs Investigation

Difficulty 3/5 1-2 days Newbie friendliness 32/100

microsoft/TypeScript#56541 · 7 reactions · Opened Nov 26, 2023
Module/interface augmentation doesn't preserve import for declaration emit Open

Domain: Declaration Emit Needs Investigation

microsoft/TypeScript#56528 · 16 comments · 1 reaction · 1 assignee · Opened Nov 24, 2023
Incorporating exhaustiveness analysis into the control flow of if statements. Open

Domain: check: Control Flow Possible Improvement

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

microsoft/TypeScript#56527 · 2 comments · Opened Nov 24, 2023
Comparison of different enumeration types error Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56524 · 2 reactions · Opened Nov 24, 2023
Warn about invalid triple slash directive location. Open

In Discussion Suggestion

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

microsoft/TypeScript#56522 · Opened Nov 24, 2023
`this` is incorrect for static fields and static accessors within decorators Open

Needs Investigation

microsoft/TypeScript#56503 · 10 reactions · 1 assignee · Opened Nov 22, 2023
[Rename symbol command] Remove unnecessary named import Open

Effort: Casual Experience Enhancement Help Wanted Suggestion

Difficulty 3/5 1-2 days Newbie friendliness 48/100

microsoft/TypeScript#56497 · 2 comments · 1 reaction · Opened Nov 21, 2023
Inference from annotated parameters of context-sensitive functions is order dependent Open

Bug Domain: check: Type Inference

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

microsoft/TypeScript#56459 · Opened Nov 19, 2023
[js/ts] Feature request: In Quick Fix menu, show also a dynamic import variant Open

Effort: Difficult Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#56472 · Opened Nov 18, 2023
Expand and shrink selection around JavaScript `if-elseif-else` statements Open

Awaiting More Feedback Domain: LS: Smart-Select Suggestion

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

microsoft/TypeScript#56432 · 2 comments · Opened Nov 16, 2023
Object spreading produces wrong type with non-literal keys Open

Bug Domain: Index Types Experimentation Needed

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

microsoft/TypeScript#56431 · 12 comments · 1 reaction · Opened Nov 16, 2023
improvements for non-experimental decorator types Open

Awaiting More Feedback Domain: Decorators Suggestion

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

microsoft/TypeScript#56426 · 4 comments · Opened Nov 16, 2023
Object union member functions that return never are incorrectly narrowed Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56425 · 6 comments · 1 reaction · Opened Nov 16, 2023
Types that depend on constants are not narrowing correctly Open

Bug Domain: Conditional Types Help Wanted

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

microsoft/TypeScript#56417 · 10 comments · Opened Nov 15, 2023
Misleading EPC error on deferred generic type when assigning any object literal, but empty object is also not assignable Open

Bug Domain: check: Excess Property Checking Help Wanted

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

microsoft/TypeScript#56391 · 1 comment · Opened Nov 14, 2023
better ux and ui design for debug Open

Needs Proposal

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

microsoft/TypeScript#56381 · 3 comments · Opened Nov 13, 2023
Strict index signatures option Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 28/100

microsoft/TypeScript#56378 · 3 comments · Opened Nov 13, 2023
[ServerErrors][JavaScript] 5.4.0-dev.20231112 Open

Needs Investigation

microsoft/TypeScript#56374 · 5 comments · 1 assignee · Opened Nov 12, 2023
Talk about Exceptions Here Open

Discussion

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

microsoft/TypeScript#56365 · 117 comments · Opened Nov 10, 2023
infinite generator transform is no longer infinite Open

Needs Investigation

microsoft/TypeScript#56363 · 1 comment · 1 reaction · 1 assignee · Opened Nov 10, 2023
Type narrowing in one case statement does not propagate to the next case Open

Domain: check: Control Flow Help Wanted Possible Improvement

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

microsoft/TypeScript#56361 · 10 comments · 5 reactions · Opened Nov 10, 2023
JSX broken generics with polymorphic components Open

Domain: JSX/TSX Help Wanted Possible Improvement

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

microsoft/TypeScript#56314 · 4 comments · 1 reaction · Opened Nov 5, 2023
Inferring function parameters from the return type Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56311 · 2 comments · 2 reactions · Opened Nov 4, 2023
Odd TS highlight/hover when hovering a comment Open

Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#56329 · 2 comments · Opened Nov 3, 2023
Option to report errors enabled by `useDefineForClassFields`, but still transpile using assignment semantics Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56298 · 4 comments · 2 reactions · Opened Nov 2, 2023
Static property access fails in transpiled JS code when referenced in a private method in TypeScript 5.2.2 Open

Bug Domain: classes

microsoft/TypeScript#56292 · 4 comments · 11 reactions · 1 assignee · Opened Nov 2, 2023
Module resolution: tsc unexpectedly rewrites the import path when exports field contains multiple entries resolving to the same file Open

Needs Proposal Suggestion

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

microsoft/TypeScript#56290 · 4 comments · Opened Nov 2, 2023
Project References Wildcards Open

In Discussion Suggestion

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

microsoft/TypeScript#56279 · 12 comments · 23 reactions · Opened Oct 31, 2023
Replace Node interface with discriminated unions Open

Experimentation Needed Suggestion

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

microsoft/TypeScript#56275 · 4 comments · 2 reactions · Opened Oct 31, 2023
Array with option allof in definition to tell TS that all options must be implemented from that array Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56273 · 4 comments · 2 reactions · Opened Oct 31, 2023
Infinities as number literal types Open

In Discussion Suggestion

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

microsoft/TypeScript#56272 · 6 comments · 1 reaction · Opened Oct 31, 2023
Invalid synthesized import specifiers on infered types in declarations Open

Needs Investigation

microsoft/TypeScript#56260 · 3 comments · 2 reactions · 1 assignee · Opened Oct 30, 2023
Reverse mapped types don't use their constraint types when no candidates are present unlike the regular type parameters Open

Domain: Mapped Types Possible Improvement

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

microsoft/TypeScript#56241 · 1 comment · 2 reactions · Opened Oct 28, 2023
Safe type assertion (upcast / widening) operator Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#56235 · 11 comments · 13 reactions · Opened Oct 27, 2023
Misleading error message Open

Domain: Error Messages Help Wanted Possible Improvement

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

microsoft/TypeScript#56230 · 2 comments · Opened Oct 27, 2023
Class parameter incorrectly treated as bivariant Open

Bug Domain: check: Variance Relationships Help Wanted

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

microsoft/TypeScript#56225 · 9 comments · 4 reactions · Opened Oct 26, 2023
Don't suggest private fields in contexts where they are out of scope Open

Experience Enhancement Suggestion

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

microsoft/TypeScript#56177 · 4 comments · 2 reactions · Opened Oct 23, 2023
TypeScript should have optimized this conditional check Open

Domain: Performance Help Wanted Possible Improvement

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

microsoft/TypeScript#56172 · 1 reaction · Opened Oct 22, 2023

microsoft/TypeScript

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