typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Typescript still checks return type in a lamba that calls a function returning 'never'
- Implicitly typed type guard does not guard
- It is possible to violate generic constraints when distributing union types
- Property lookups on arguments to type parameters constrained by string index signatures can violate other constraints because undefined is included for optional properties
- `ReadonlyMap` lacks documentation for `forEach`, `get`, `has` and `size`
- Exported namespace class suppresses TS1308 for await in computed member names
- docs: add JSDoc comments to ReadonlyMap interface
- Support recent `Iterator`/`Iterator.prototype` methods in `esnext` (eventually `es2027`)
- Support `Promise.allKeyed`/`Promise.allSettledKeyed` methods in `esnext` (eventually `es2027`)
- `lib.d.ts` Updates for TypeScript 7.1
- Docs
- TypeScript not yet supported