typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- partial function with generic lost the type constraint
- Compiler option to require final "catch-all" case in overload declarations
- Document and/or deprecate Node's getFullStart() vs. pos?
- Rename doesn't work on declaration whose name is a string literal
- Expose `TypeChecker.getTypeOnlyAliasDeclaration` or similar API to detect if a symbol is a "value" or a "type"
- Cannot describe recursive type aliases like JSON in terms of generic mapped types
- Misleading error message when interface tries to extend constrained type parameter
- Generic indexed access on type with optional properties doesn't include `undefined` in its constraint in `exactOptionalPropertyTypes`
- Binary expression in an `if` condition can't narrow identifier reassigned within expression of the optional chain
- Provide Compiler API way to disable type checking for a source file
- Docs
- TypeScript not yet supported