TypeScript 5.3 beta is released

published on 2023/11/21
  • Import Attributes
  • Stable Support resolution-mode in Import Types
  • switch (true) Narrowing
  • Narrowing On Comparisons to Booleans
  • instanceof Narrowing Through Symbol.hasInstance
  • Checks for super Property Accesses on Instance Fields
  • Interactive Inlay Hints for Types
  • Optimizations by Skipping JSDoc Parsing
  • Optimizations by Comparing Non-Normalized Intersections
  • Consolidation Between tsserverlibrary.js and typescript.js
  • Breaking Changes and Correctness Improvements