http://www.typescriptlang.org/
TypeScript - JavaScript that scales.
TypeScript brings you optional static type-checking along with the latest ECMAScript features.
http://www.typescriptlang.org/index.html#download-links
Get TypeScript
Node.js
The command-line TypeScript compiler can be installed as a Node.js package.
INSTALLnpm install -g typescript
COMPILEtsc helloworld.ts
