TypeScript is a typed superset of JavaScript that compiles directly to JavaScript code. TypeScript files commonly use the .ts extension. Many IDEs support TypeScript without any other setup required, but TypeScript can also be compiled with the TypeScript Node.JS package from the command line.
Visual Studio 2015 includes TypeScript.Visual Studio 2013 Update 2 or later includes TypeScript, or you can download TypeScript for earlier versions.[WebStorm 2016.2](<https://www.jetbrains.com/webstorm/>) comes with TypeScript and a built-in compiler. [Webstorm is not free][IntelliJ IDEA 2016.2](<https://www.jetbrains.com/idea/>) has support for Typescript and a compiler via a plugin maintained by the Jetbrains team. [IntelliJ is not free][Atom](<https://atom.io/>) supports TypeScript with the atom-typescript package.[Sublime Text](<https://www.sublimetext.com/>) supports TypeScript with the typescript package.You can install TypeScript globally to have access to it from any directory.