TypeScript 4.0 has landed on August 20th, 2020.
- Variadic Tuple Types
- Labeled Tuple
- Class Property Inference from Constructors
- Short-Circuting Assignement Operators
unknownoncatchclauses- Custom JSX Factories
- type import
- private fields
- top-lelvel await
- export *
- recursive-type alias
- assertion-style function
- optional chaining
- coalescing
- incremental
- build mode
- object spread on generic
- bind, call, apply
- mapped type for tuple and array
- Tuple Types
- Project Reference
- unknown