typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Improve error message for accessing instance properties via super
- No batched `getContextualType` in 7.1 API
- Design Meeting Notes, 2026-09-15
- enhance: Add tests for premature caching of contextual parameter types
- test: cover contextual parameter type caching
- Improve performance of batched requests
- Iterate antecedent pass so self-assignment in a loop correctly narrows
- Fix non-null discriminant narrowing consistency
- Remove duplicated comments on legacy decorators
- Object with all context-sensitive properties requires at least one non-context-sensitive property for inference to work
- Docs
- TypeScript not yet supported