typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- checker.getSuggestionDiagnostics fails with `TypeError: Cannot read properties of undefined (reading 'parent')`
- Add a flag to error when an uninitialized function is called
- Slow compilation with nested optional chaining
- Restrict indexed accesses on nonpublic fields of concrete types the same way we do generic ones
- strange interaction with `resolveJsonModule`, `createRequire`, naming it `require`, and requiring JSON
- `Element.getElementsByTagName` marked as deprecated
- Fixed an issue with `ReduceLabel` flows spoiling node reachability cache
- Mixins created from `obj.constructor` cannot have members
- Exhaustive switch case with returns can mark a finally block as unreachable
- Conditional type flow types missing in the template in mapped types with as clause
- Docs
- TypeScript not yet supported