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null/undefined guards sometimes adds & ({} | undefined/& ({} | null (out of nowhere) to the tested variable.

Status: Open.

#63385 In microsoft/TypeScript;

· denis-migdal opened on Apr 10, 2026

JS and TS Tasking long time to start which make the save of tsx files slower.

Status: Open.

#63384 In microsoft/TypeScript;

· flexdevguy opened on Apr 10, 2026

ESM strict imports mode option to moduleResolution bundler

Status: Open.

#63381 In microsoft/TypeScript;

· paztis opened on Apr 9, 2026

Wrong inference for defaulted generic in nested call

BugA bug in TypeScriptA bug in TypeScript

Status: Open.

#63380 In microsoft/TypeScript;

· TurtIeSocks opened on Apr 9, 2026

·  

Backlog

es2025 is not a valid enum option for jsconfig.json's compilerOptions.target enum

DocsThe issue relates to how you learn TypeScriptThe issue relates to how you learn TypeScript

Status: Open.

#63379 In microsoft/TypeScript;

· Abrifq opened on Apr 9, 2026

Object properties are inferred in the wrong order: should infer properties with NoInfer<T> AFTER properties with T

Possible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some cases

Status: Open.

#63378 In microsoft/TypeScript;

· denis-migdal opened on Apr 9, 2026

·  

Backlog

TS doesn't properly infer generic callback <T>(x: X<T>) => T when providing (x) => new T() (parameter defined without type)

QuestionAn issue which isn't directly actionable in codeAn issue which isn't directly actionable in code

Status: Open.

#63377 In microsoft/TypeScript;

· denis-migdal opened on Apr 9, 2026

TS2589 regression in 6.0: implements without type parameters causes excessive type instantiation when property uses concrete generic type

FixedA PR has been merged for this issueA PR has been merged for this issue

Status: Open.

#63376 In microsoft/TypeScript;

· julienw opened on Apr 8, 2026

Typescript 'rootDir' error

Status: Open.

#63383 In microsoft/TypeScript;

· m-hall opened on Apr 8, 2026

Typescript Server syntax highlighting bug: introduced by recent update

Status: Open.

#63382 In microsoft/TypeScript;

· kidCaulfield opened on Apr 8, 2026

tsserver hangs in Yarn PnP projects — incorrect directory watcher due to unchecked indexOf returning -1

Status: Open.

#63373 In microsoft/TypeScript;

· sebaspf opened on Apr 7, 2026

Add a redeclare keyword to redeclare class attributes, behaving like override !: while keeping type modifiers.

Awaiting More FeedbackThis means we'd like to hear from more people who would be helped by this featureThis means we'd like to hear from more people who would be helped by this feature

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#63370 In microsoft/TypeScript;

· denis-migdal opened on Apr 7, 2026