TypeScript is a language for application-scale JavaScript.
TypeScript adds optional types, classes, and modules to JavaScript.
TypeScript supports tools for large-scale JavaScript applications for any browser, for any host, on any OS.
TypeScript compiles to clean, readable, standards-based JavaScript. Try it out at https://www.typescriptlang.org/playground.
This is a standalone, power tool release of TypeScript for Visual Studio 2015. It includes both the TypeScript experience for Visual Studio and a standalone compiler that can be used from the command line.
TypeScript 2.2 for Visual Studio 2015 requires VS 2015 Update 3