typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Replace Node interface with discriminated unions
- Project References Wildcards
- Infinities as number literal types
- Invalid synthesized import specifiers on infered types in declarations
- Array with option allof in definition to tell TS that all options must be implemented from that array
- Reverse mapped types don't use their constraint types when no candidates are present unlike the regular type parameters
- Safe type assertion (upcast / widening) operator
- Misleading error message
- Class parameter incorrectly treated as bivariant
- TypeScript should have optimized this conditional check
- Docs
- TypeScript not yet supported