TypeScript 2.9 has shipped with several new editor features added along with some language/compiler features.

Microsoft's TypeScript 3.9 JavaScript spin-off brings major compile time improvements for popular JavaScript libraries.

The latest version of the TypeScript programming language promises to cut compile times for existing projects.

As TypeScript 3.9 approaches general availability in the next couple weeks or so, the new release candidate boasts several improvements, along with better code editor functionality and other tweaks.