Introduction to TypeScript: Building a Rogue-like Engine
Colt McAnlis, Petter Lubbers, Brandon Jones, Duncan Tebbs, Andrzej Manzur, Sean Bennett, Florian d’Erfurth, Bruno Garcia, Shun Lin, Ivan Popelyshev, Jason Gauci, Jon Howard, Ian Ballantyne, Jesse Freeman, Takuo Kihira, Tyler Smith, Don Olmstead, John McCutchan, Chad Austin, Andres Pagella · Apress eBooks · 2014
TypeScript ( http://typescript.org ) is a typed superset of JavaScript that compiles to plain JavaScript. TypeScript is cross-platform, runs on any browser, and is open source. Microsoft created it, and it’s hands down one of the best languages for building HTML5 games. One of the great things about TypeScript, apart from adding typing to JavaScript, is that it allows you to start using some of the cool features of ECMAScript 6 (ES6) now, even though it may be years away from being finalized. This means that you can put to good use classes and other higher-level constructs that you find in languages such as C# and Java; moreover, TypeScript is incredibly similar to ActionScript 2 and 3. The final key advantage of TypeScript is that it outputs human readable JavaScript, plus you can use existing JavaScript libraries or inject the code directly into your TypeScript classes and start taking advantage of typing provided by the compiler.