typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Add support for `@file` jsdoc tag to describe a module
- Proposal: `unstable` and `volatile` control-flow analysis modifiers
- Design Meeting Notes, 2026-07-21
- Design Meeting Notes, 2026-06-23
- Design Meeting Notes, 2026-07-23
- type parameter variance in generic call signature is incorrectly bivariant
- Should not allow `import.defer?.('x')`
- Module value in TSConfig does not enforce ModuleResolution value
- 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)
- [5.9 regression] as const readonly tuple inferred as mutable through a nested generic call under a conditional-type circular constraint
- Docs
- TypeScript not yet supported