🔗 Announcing TypeScript 5.3 Beta

Today we are excited to announce the availability of TypeScript 5.3 Beta.

To get started using the beta, you can get it through NuGet, or through npm with the following command:

npm install -D typescript@beta

Here's a quick list of what's new in TypeScript 5.3!

• 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