typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- TS 5.6 `files` missing from `--showConfig` (with absolute / ``${configDir}`` `include` paths)
- Uninitialized local check still permits provably erroneous use-before-assign in closure
- VSCode errors when refactoring JavaScript to new file
- ScriptKind.Deferred treated as LanguageVariant.Standard
- Add well-known symbols for ReadonlyMap and ReadonlySet
- `asserts this is T` does not narrow type of `this`
- Assertion signature on generics doesn't narrow
- Fixed narrowing of optional chains using type predicates
- Error on destructured nullables
- Add numeric constraints to type parameters of mapped types with array/tuple intersections constraints
- Docs
- TypeScript not yet supported