TypeScript v4.0
2020/8/20
Variadic Tuple Types
Labeled Tuple Elements
Class Property Inference from Constructors
Short-Circuiting Assignment Operators
unknown on catch Clauses
Custom JSX Factories
Speed Improvements in build mode with --noEmitOnError
--incremental with --noEmit
Editor Improvements
Convert to Optional Chaining
/** @deprecated */ Support
Partial Semantic Mode at Startup
Smarter Auto-Imports
Our New Website!
Breaking Changes