typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Further improve mapped type support for tuples and arrays (almost complete Promisify<T> inside!)
- No related error spans return for type assignment mismatch
- Return type inference error with async functions and Promise.reject()
- Allow ability to do an in-place override (_not_ extend) of interface properties
- Preserve union type name within larger union
- Show signature help when overriding/implementing method
- Improve completions with --checkJs turned off
- type.isLiteral() returns false for boolean literals
- Tuple iteration and merging
- fourslash test breaks when setting "@lib"
- Docs
- TypeScript not yet supported