typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Destructuring a possibly `undefined` object not caught, throws an error at runtime
- VSCode errors when refactoring JavaScript to new file
- ScriptKind.Deferred treated as LanguageVariant.Standard
- Ability to pick setter types (instead of getter types) in a mapped type
- Regression Bug: Error "The type of this node cannot be serialized because its property '[fooSymbol]' cannot be serialized." happens but potentially avoidable automatically.
- JSDoc with @extends, type parameter and member expression gives wrong dts output
- `asserts this is T` does not narrow type of `this`
- Assertion signature on generics doesn't narrow
- [Control flow] Array filter with typeguard works differently following array initial value
- undefined is narrowed away incorrectly
- Docs
- TypeScript not yet supported