typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Type mapping unexpectedly leads to missing keys
- Conditional type prevents assignability
- ESNext emits optional class members
- A derived class is allowed be created without a parent's getter or setter.
- Unexpected lack of type error when the `exactOptionalPropertyTypes` flag is not set
- Fails to perform type narrowing on functions that return "never"
- Require "as const"?
- non-overlapping cast error should suggest casting to the narrowest possible type instead of `unknown`
- Possible memory-leak or infinite recursion in type-checking algorithm.
- Empty array in union with tuple doesn't infer undefined on indexed access
- Docs
- TypeScript not yet supported