microsoft/TypeScript

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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

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4,857 open issues indexed

Cache `getExePath()` for performance reasons Open

Possible Improvement

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

microsoft/TypeScript#63801 · 7 comments · Opened Feb 19, 2026
False positive "Private field ... must be declared in an enclosing class." Open

Bug Domain: LS: TSServer

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

microsoft/TypeScript#63159 · 3 comments · Opened Feb 18, 2026
API usage patterns for complex editor extensions Open

microsoft/TypeScript#63800 · 56 comments · 110 reactions · 1 assignee · Opened Feb 18, 2026
Intellisense keeps crashing Open

Bug Domain: LS: TSServer Help Wanted Needs Human Review Needs More Info

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

microsoft/TypeScript#63151 · 25 comments · Opened Feb 17, 2026
[Feature Request] Static C library Open

Possible Improvement

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

microsoft/TypeScript#63799 · 1 comment · Opened Feb 16, 2026
Add switch to disable _var unused variable prevention Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#63143 · 10 comments · Opened Feb 15, 2026
[JavaScript/TypeScript Language Hints] Hide default `Function` properties/methods until manually typed just like in Rust. Open

Experience Enhancement Suggestion

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

microsoft/TypeScript#63150 · 2 comments · 2 reactions · Opened Feb 15, 2026
Regression: Mapped types are no longer homomorphic when wrapped in certain conditional types Open

Needs Investigation

microsoft/TypeScript#63132 · 2 comments · 1 assignee · Opened Feb 12, 2026
Allow non-null assertion operator on destructuring Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#63131 · 2 comments · Opened Feb 12, 2026
TSC should not error on valid subpath specifier syntax (TS2877) Open

Awaiting More Feedback Suggestion

Difficulty 3/5 1-2 days Newbie friendliness 64/100

microsoft/TypeScript#63129 · 14 comments · 2 reactions · Opened Feb 11, 2026
Reconsider tsconfig membership lookups for `.d.ts` files in `composite` Open

microsoft/TypeScript#63798 · 1 assignee · Opened Feb 11, 2026
Instantiation expressions should filter overloads by type parameter constraints Open

Needs Investigation

microsoft/TypeScript#63126 · 6 comments · 1 assignee · Opened Feb 11, 2026
Display files with errors summary in `--watch` mode Open

Awaiting More Feedback Suggestion

Difficulty 3/5 1-2 days Newbie friendliness 68/100

microsoft/TypeScript#63121 · 3 comments · 1 reaction · Opened Feb 8, 2026
Support loading remote types Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#63115 · 5 comments · 2 reactions · Opened Feb 8, 2026
Clarify tsconfig extends resolution Open

Docs

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

microsoft/TypeScript#63109 · 2 comments · Opened Feb 6, 2026
Add support for OSC8 hyperlinks in TTY output Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#63082 · 2 comments · 2 reactions · Opened Feb 3, 2026
Fourslash is broken when making requests in unconfigured .js files Open

Bug

microsoft/TypeScript#63797 · 3 comments · 1 reaction · 2 assignees · Opened Jan 30, 2026
Make standard library types more polyfills‑friendly Open

Domain: lib.d.ts In Discussion Suggestion

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

microsoft/TypeScript#63069 · 5 reactions · Opened Jan 30, 2026
Narrow object property indexed by another object's property of unique symbol type (like `Symbol.iterator`) Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#63059 · Opened Jan 28, 2026
Double error message when referencing variable of type union of string literals from ambient declaration Open

Domain: Error Messages Help Wanted Possible Improvement

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

microsoft/TypeScript#63050 · 3 comments · Opened Jan 25, 2026
RangeError: Maximum call stack size exceeded in getTypeFromTypeNode when resolving recursive tuple rest with intersection Open

Bug Domain: check: Type Circularity

microsoft/TypeScript#63040 · 2 comments · 1 assignee · Opened Jan 23, 2026
Regression of `this is` type predicate for intersection of unions from 4.7 to 4.8 Open

Bug Domain: This-Typing Needs Human Review

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

microsoft/TypeScript#63039 · 4 comments · 1 reaction · Opened Jan 22, 2026
Autocomplete incorrectly suggests transitive files from monorepo package Open

Bug Corsa Domain: LS: Auto-import

Difficulty 3/5 1-2 days Newbie friendliness 50/100

microsoft/TypeScript#63033 · 7 comments · 1 reaction · Opened Jan 22, 2026
Regression: Generic function returning union of tuples is not assignable to identical type since v4.2 Open

Domain: check: Type Inference Help Wanted Possible Improvement

Difficulty 4/5 3-5 days Newbie friendliness 50/100

microsoft/TypeScript#63019 · 5 comments · Opened Jan 20, 2026
Crash： when inferring from a tuple with middle rest elements and trailing variadic elements Open

Bug Domain: Crashes Help Wanted

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

microsoft/TypeScript#63005 · 1 comment · Opened Jan 17, 2026
Explicit `never` return type in `catch` block & condition in `finally` marks the whole `finally` block as unreachable Open

Bug Domain: check: Control Flow

Difficulty 4/5 3-5 days Newbie friendliness 48/100

microsoft/TypeScript#63004 · 2 comments · 1 reaction · Opened Jan 17, 2026
Global 'this' capture logic is slightly wrong in `--noImplicitThis` Open

Needs Investigation

microsoft/TypeScript#63001 · 1 comment · 1 assignee · Opened Jan 16, 2026
generics in constructor Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#62992 · 4 comments · 1 reaction · Opened Jan 16, 2026
Not currectly parse superClass starts with `{}` Open

Bug Domain: Parser

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

microsoft/TypeScript#62991 · 2 comments · Opened Jan 16, 2026
Use LazyBarrel to improve IDE performance Open

Awaiting More Feedback Domain: Performance Suggestion

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

microsoft/TypeScript#62988 · 2 comments · Opened Jan 15, 2026
JSDoc comments for async_hooks are confusing/misleading Open

Experience Enhancement Help Wanted Suggestion

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

microsoft/TypeScript#62967 · 2 comments · Opened Jan 9, 2026
`@deprecated` on property getter and setters. Open

Bug Domain: LS: Type Display

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

microsoft/TypeScript#62965 · 3 comments · Opened Jan 8, 2026
Initializing tsconfig.json hangs Open

Needs More Info

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

microsoft/TypeScript#62960 · 8 comments · 1 reaction · Opened Jan 7, 2026
Explicit variance annotations for built-in .d.ts files Open

Experimentation Needed In Discussion Suggestion

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

microsoft/TypeScript#62954 · 1 comment · 1 reaction · Opened Jan 5, 2026
Crash: RangeError: Maximum call stack size exceeded during contextual typing of object literal with yield in computed property name Open

Bug Domain: check: Contextual Types Help Wanted

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

microsoft/TypeScript#62941 · 1 comment · Opened Jan 1, 2026
[Feature Request] [Typescript Extension] Less redundant inlay hints for arrow function vars/consts Open

Awaiting More Feedback Domain: LS: Inlay Hints Suggestion

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

microsoft/TypeScript#62953 · Opened Dec 24, 2025
Module resolution: ambient JSON wildcard module doesn't override `resolveJsonModule` typing Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#62924 · 4 comments · Opened Dec 23, 2025
Feature: Const-literal typing for import-attribute imports Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#62919 · 3 comments · 5 reactions · Opened Dec 22, 2025
Document that compiler.extends can be an array Open

Docs Help Wanted

Difficulty 1/5 Under an hour Newbie friendliness 82/100

microsoft/TypeScript#62915 · 3 comments · Opened Dec 20, 2025
Spreading object with optional property causes incorrect type inference when `exactOptionalPropertyTypes = false` Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#62906 · 3 comments · 1 reaction · Opened Dec 17, 2025
Provide a new, simple 'browser' moduleResolution mode for Browser, ESM-based, non-bundled projects. Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#62905 · 2 comments · 2 reactions · Opened Dec 17, 2025
Enable IntelliSense in staged files Open

Possible Improvement

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

microsoft/TypeScript#63795 · 5 comments · 1 reaction · Opened Dec 16, 2025
erasableSyntaxOnly: support commonjs require/exports in .cts files Open

Needs Investigation

microsoft/TypeScript#62903 · 1 reaction · 1 assignee · Opened Dec 16, 2025
Using declarations like a statement leads to strange bugs. Open

Bug Domain: check: Control Flow Help Wanted

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

microsoft/TypeScript#62896 · 7 comments · Opened Dec 14, 2025
References code lens does not include imports as references Open

microsoft/TypeScript#63794 · 1 reaction · 1 assignee · Opened Dec 12, 2025
Provide document links in tsconfig/jsconfig files Open

Possible Improvement

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

microsoft/TypeScript#63793 · 1 comment · Opened Dec 12, 2025
Autocompletion does NOT remove `type` from `import type` when needed Open

Experience Enhancement Suggestion

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

microsoft/TypeScript#62882 · 2 comments · Opened Dec 11, 2025
subpath imports should play well with project references Open

Needs Investigation

microsoft/TypeScript#62880 · 1 comment · 1 assignee · Opened Dec 11, 2025
Questionable code lenses for object type members on a single line Open

microsoft/TypeScript#63792 · 1 assignee · Opened Dec 11, 2025
TypeScript for .Net Projects Open

Possible Improvement

microsoft/TypeScript#63791 · 4 comments · 3 reactions · 1 assignee · Opened Dec 10, 2025

microsoft/TypeScript

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