1. TypeScript: The Gateway Drug Dealer: @Derik Whittaker

2. Why it’s a Gateway Drug

3. Definition: a habit-forming drug that, while not itself addictive, may lead to the use of other addictive drugs.

4. What is TypeScript?

5. A JavaScript SuperSet * Compiles down to pure JavaScript

6. All JavaScript is valid TypeScript

7. Not another Language like CoffeeScript || Dart

8. “What TypeScript does is, it basically formalizes a static type system that describes JavaScripts dynamic types. But it describes them at development time, not compile time” -- Anders Hejsberg

9. EcmaScript 4 & 6 Compliant * * Based on current proposals

10. Why use TypeScript?

11. Simpler Syntax ** Removes some fuggly from JavaScript **

12. Compile time Type Checking * * Type checking can be turned off

13. Compiles to compliant JavaScript

14. Improved Tooling inside VisualStudio

15. How to get TypeScript?

16. Install the Visual Studio plugin * Available at http://typescriptlang.org

17. Install the Node.js compiler * Available at http://typescriptlang.org

18. Install Web Essentials Plugin * Available at http://vswebessentials.com

19. Target Audience

20. Non-Traditional JavaScript Developers

21. Enterprise Scale Applications

22. Software Simplest

23. Language Features

24. Type Definition Files * Similar to C++ header files

25. Github Repository of Type Definition s * Available at http://github.com/borisyankov/DefinitelyTyped

26. /// Source Dependencies

27. filtered = _.filter(filtered, (item: Models.UpcomingReminderModel) => { var forcastMatch = _.any(item.ForcastTypes(), (type: number) => { var typeMatch = type == rangeFilterKey; return typeMatch; }); return forcastMatch; }); private pageSize: number = 8; private activePage: number = 1; Type Checking

28. Lambda Syntax * Also called Arrow Syntax $.get(route).done((results) => { var convertedResults = []; });

29. Inheritance

30. Interfaces * Design time only constructs

31. Generics * Design time only constructs

32. Modules and Classes

35. Thank you! @derikwhittaker http://devlicio.us/blogs/derik_whittaker http://www.linkedin.com/in/derikwhittaker http://bit.ly/DerikWhittaker_PS Hope you enjoyed the session!