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

Add `es2026` as valid `target` and `lib` Open

Committed Domain: lib.d.ts ES Next Suggestion

microsoft/TypeScript#63704 · 2 comments · 6 reactions · 1 assignee · Opened Jul 31, 2026
TypeScript 7.1 Iteration Plan Open

Planning

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

microsoft/TypeScript#63703 · 11 comments · 106 reactions · Opened Jul 31, 2026
`lib.d.ts` Updates for TypeScript 7.1 Open

Bug Domain: lib.d.ts

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

microsoft/TypeScript#63702 · Opened Jul 31, 2026
Support `Promise.allKeyed`/`Promise.allSettledKeyed` methods in `esnext` (eventually `es2027`) Open

Committed Domain: lib.d.ts Suggestion

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

microsoft/TypeScript#63701 · 10 reactions · Opened Jul 31, 2026
Support recent `Iterator`/`Iterator.prototype` methods in `esnext` (eventually `es2027`) Open

Committed Domain: lib.d.ts Suggestion

Difficulty 3/5 1-2 days Newbie friendliness 52/100

microsoft/TypeScript#63700 · 3 reactions · Opened Jul 31, 2026
[ServerErrors][TypeScript] main vs Open

Needs Investigation

microsoft/TypeScript#63868 · 19 comments · 1 assignee · Opened Jul 30, 2026
`tsc --watch` doesn't recompile on file change Open

Needs More Info

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

microsoft/TypeScript#63867 · 5 comments · 3 reactions · Opened Jul 30, 2026
Add support for `@file` jsdoc tag to describe a module Open

Awaiting More Feedback Suggestion

Difficulty 4/5 3-5 days Newbie friendliness 52/100

microsoft/TypeScript#63695 · 1 reaction · Opened Jul 30, 2026
Assignability between distributive conditional types and their branch type is reversed in contravariant positions Open

Needs Investigation

microsoft/TypeScript#63694 · 1 assignee · Opened Jul 30, 2026
Typescript 6.0.3升级到7.0后报错 Open

Needs Investigation

microsoft/TypeScript#63693 · 1 comment · 1 reaction · 1 assignee · Opened Jul 30, 2026
JSDoc tag for getting around "Object literals are open-ended" Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 45/100

microsoft/TypeScript#63691 · Opened Jul 29, 2026
Proposal: `unstable` and `volatile` control-flow analysis modifiers Open

Awaiting More Feedback Suggestion

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

microsoft/TypeScript#63681 · 2 comments · 1 reaction · Opened Jul 27, 2026
Panic: nil pointer in NodeList.HasTrailingComma during incremental rebuild (build-mode declaration printer) — 7.0.2 and current nightly Open

Needs Investigation

microsoft/TypeScript#63865 · 4 comments · 1 assignee · Opened Jul 26, 2026
Should not allow `import.defer?.('x')` Open

Bug Domain: Parser Help Wanted

Difficulty 3/5 1-2 days Newbie friendliness 70/100

microsoft/TypeScript#63679 · 4 comments · Opened Jul 25, 2026
[ServerErrors][TypeScript] main vs Open

microsoft/TypeScript#63864 · 5 comments · 1 assignee · Opened Jul 24, 2026
type parameter variance in generic call signature is incorrectly bivariant Open

Bug Domain: check: Variance Relationships

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

microsoft/TypeScript#63677 · 2 comments · Opened Jul 24, 2026
Design Meeting Notes, 2026-07-23 Open

Design Notes

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

microsoft/TypeScript#63676 · 2 reactions · Opened Jul 23, 2026
Design Meeting Notes, 2026-06-23 Open

Design Notes

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

microsoft/TypeScript#63674 · Opened Jul 23, 2026
Design Meeting Notes, 2026-07-21 Open

Design Notes

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

microsoft/TypeScript#63673 · Opened Jul 23, 2026
Module value in TSConfig does not enforce ModuleResolution value Open

Needs Investigation

microsoft/TypeScript#63671 · 1 assignee · Opened Jul 23, 2026
`javascript.validation.enabled` editor setting controls typescript validation as well Open

Bug Needs Human Review

microsoft/TypeScript#63863 · 2 comments · 1 assignee · Opened Jul 22, 2026
wasip1: LSP over node:wasi hangs after `initialize` — signal watcher starves the scheduler (fix included) Open

Bug

microsoft/TypeScript#63862 · 1 comment · 1 assignee · Opened Jul 22, 2026
[5.9 regression] as const readonly tuple inferred as mutable through a nested generic call under a conditional-type circular constraint Open

Bug Domain: check: Type Inference

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

microsoft/TypeScript#63666 · Opened Jul 22, 2026
Incremental builder re-emits entire transitive import closure on a whitespace-only edit (regression in 5.5: exportedModulesMap removal + text version hashes stored as shape signatures) Open

Needs Investigation

microsoft/TypeScript#63664 · 1 assignee · Opened Jul 21, 2026
`--build --dry` reports a noEmit project reference as perpetually out of date (expects emitted output that noEmit never produces) Open

Needs More Info

Difficulty 4/5 3-5 days Newbie friendliness 52/100

microsoft/TypeScript#63656 · 1 comment · Opened Jul 19, 2026
Publish an official wasip1 (WASI) build artifact of tsgo Open

Infrastructure Needs Investigation

microsoft/TypeScript#63858 · 9 comments · 4 reactions · 1 assignee · Opened Jul 14, 2026
experimentalDecorators: a class name used as an object literal key is renamed to the self-reference alias Open

Bug

microsoft/TypeScript#63857 · 2 reactions · 2 assignees · Opened Jul 14, 2026
In a class, an unique symbol attribute is sometime lost during incremental build Open

Needs More Info

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

microsoft/TypeScript#63644 · 9 comments · Opened Jul 14, 2026
tsc is not resposive to `ctrl-c` Open

Needs Investigation

microsoft/TypeScript#63856 · 2 comments · 9 reactions · 1 assignee · Opened Jul 13, 2026
Identical resolved program produces 157 vs 662,155 diagnostics depending on whether the tsconfig is passed directly or through a pass-through extends Open

Needs More Info

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

microsoft/TypeScript#63854 · 1 comment · Opened Jul 12, 2026
Local auto-imports disappear when a Yarn workspace dependency resolves a subpath back to the current project Open

Needs Investigation

microsoft/TypeScript#63852 · 1 comment · 4 reactions · 1 assignee · Opened Jul 10, 2026
Proposal: Export multiple, runtime-specific declaration files Open

Needs Proposal Suggestion

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

microsoft/TypeScript#63641 · 3 reactions · Opened Jul 10, 2026
Some colors make error messages hard to read on white backgrounds. Open

Awaiting More Feedback Suggestion

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

microsoft/TypeScript#63648 · 2 comments · Opened Jul 10, 2026
Add ability to get emit output from the API Open

Needs Investigation

microsoft/TypeScript#63851 · 2 reactions · 1 assignee · Opened Jul 9, 2026
Incorrect diagnostic message in TS2814 Open

Bug Domain: Error Messages

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

microsoft/TypeScript#63628 · 2 comments · Opened Jul 7, 2026
`NoInfer` changes behavior for type matching on spread Open

Needs Investigation

microsoft/TypeScript#63627 · 5 comments · 1 assignee · Opened Jul 7, 2026
Support HTMLElement.focus() Option FocusVisible Open

Fixed

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

microsoft/TypeScript#63626 · 1 comment · Opened Jul 6, 2026
`get self(): this` in an interface crashes the checker (6.0 regression) Open

Fixed

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

microsoft/TypeScript#63619 · 3 comments · Opened Jul 6, 2026
Inconsistent `typeof this` when the `this` parameter declared in the signature of a function parameter Open

Bug Domain: This-Typing

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

microsoft/TypeScript#63616 · 1 comment · Opened Jul 6, 2026
SourceFile text does not include BOM Open

Needs Investigation

microsoft/TypeScript#63850 · 5 comments · 1 assignee · Opened Jul 2, 2026
Issue: TypeScript autocomplete for template literal types ignores user's Quote Style preference Open

Bug Domain: LS: Completion Lists

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

microsoft/TypeScript#63603 · 2 comments · Opened Jul 1, 2026
project reference { "path": "" } is ignored Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 62/100

microsoft/TypeScript#63848 · 2 comments · Opened Jun 30, 2026
Auto-imports hits unimplemented `GetSourceOfProjectReferenceIfOutputIncluded` Open

Bug

microsoft/TypeScript#63847 · 2 comments · 1 reaction · 2 assignees · Opened Jun 30, 2026
Feature request: machine-readable (JSONL) diagnostics output Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 45/100

microsoft/TypeScript#63632 · 6 comments · Opened Jun 29, 2026
add an option to report an error when `Symbol.dispose`/`Symbol.asyncDispose` objects are used without the `using` keyword Open

Awaiting More Feedback Suggestion

Difficulty 5/5 Over a week Newbie friendliness 42/100

microsoft/TypeScript#63597 · 6 comments · 3 reactions · Opened Jun 29, 2026
tagged/named rest parameter participating in circular reference causes error Open

Bug Domain: check: Type Circularity

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

microsoft/TypeScript#63584 · 1 reaction · Opened Jun 25, 2026
`isolatedDeclarations` quick-fix cannot consistently use auto-imports Open

Bug

microsoft/TypeScript#63846 · 2 reactions · 2 assignees · Opened Jun 23, 2026
Regression: recursive conditional+mapped "serialize" type no longer proves `Transform<X>` assignable to `X` on deeply-nested compound types (native-preview; works in tsc) Open

Needs More Info

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

microsoft/TypeScript#63845 · 9 comments · Opened Jun 23, 2026
Hover documentation for parameters documented with jsdoc renders improperly Open

Experience Enhancement Suggestion

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

microsoft/TypeScript#63573 · 1 comment · Opened Jun 22, 2026
Add native-preview API for capturing .d.ts emit output Open

API Request

microsoft/TypeScript#63843 · 3 comments · 1 assignee · Opened Jun 19, 2026

microsoft/TypeScript

Get new issues in your inbox