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 3.7: unlike `x is T`, `asserts x is T` cannot close over generics defined in outer scopes
- Allow type aliases to reference themselves in type argument positions
- Support ES `export <default> from` form
- Suggestion: flip the assignment direction of generated enums to save some bits
- Attempt to more-frequently use local aliases when printing out types
- Generator functions which have a return type of a union of Iterator/AsyncIterator have a yield type of never
- Mixin expected argument type resolves to never when constrained to constructor of type whose property is typed via a type parameter
- need "libRoots" in tsconfig.json for private node-runtime type definition
- Mapped type over string enum keys should have quick info showing computed enum members as keys, not identifiers/strings
- Why doesn't awaiting a Promise<never> change reachability?
- Docs
- TypeScript not yet supported