Who developed Typescript and what is the current stable version of Typescript?

Typescript was developed by Anders Hejlsberg in 2012, who is the lead architect of C# and the creator of Delphi and Turbo Pascal. Typescript is a free and open source programming language maintained by Microsoft. It is a superset of JavaScript. It was developed for the development of large application. The current stable version of this programming language is 2.7.0-beta-20171212 which was released on December 12, 2017. Typescript compiles to simple JavaScript code which runs on any browser that supports ECMAScript 3 framework. It offers support for the latest and evolving JavaScript features.