The TypeScript team recently announced version 3.1 of TypeScript, adding mappable tuple and array types and several other refinements.

Less than two weeks after publishing the TypeScript 2.8 Release Candidate, Microsoft has officially launched it into general availability, bringing conditional types and more.

Overall, the TypeScript 2.8 release has several improvements, most of which build upon the introduction of conditional types, improving the approach for expressing more complex type definitions.