typescript
https://github.com/microsoft/typescript
TypeScript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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- Issues
- Syntactic checks against comparing to null/undefined in strictNullChecks mode
- Make enum literal type identical to the union of its values
- Use contextual type of the left operand for the right one in assignments to auto-typed class fields
- auto-imports (import suggestions) randomly stopped working
- Check if for-of iterated element types are disposable when using `using` declarations
- Fixed local `extends` constraints of infer type parameters when they can contain type variables
- JSDoc `@import` no longer works correctly with default exports
- fix up always-truthy check for 0n and support negative numbers
- Can extends [any, any] but not generic which is exactly [any, any] (woks till 5.3.3 breaks from 5.4.5)
- Seeking Guidance: Significant performance regression within editor when upgrading typescript versions in large monorepo
- Docs
- TypeScript not yet supported