TypeScript is a programming language designed for large-scale JavaScript application development, it has been designed as a typed superset of JavaScript. This means weÕve actually been writing TypeScript this whole time! __
This language allow us to use features from the most recent ECMAScript versions and even some features that are not even in the scope of the standard. This is because when compiled, it produces JavaScript in a cross-platform safe version. TypeScript, currently in the version 2.5, adds features like optional static typing, classes, interfaces, modules, and many others. All of this allow us to use JavaScript from the future right now!