JavaScript has grown from a webpage toy to being used in large-scale deployments both on the server and in the browser. This rapid growth has outpaced the growth of the language itself, which lacks features that allow teams to communicate requirements and build applications safely. This session will be a deeper tour of TypeScript, a new language and toolset that makes it easier to write cross-platform, application-scale JavaScript. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. TypeScript adds optional static types, classes, and modules to JavaScript to enable great tooling and better structuring of large JavaScript applications. The TypeScript compiler is open source, cross-platform and open specification, and is written in TypeScript. The compiler outputs standard JavaScript that runs in any browser or any host.

1. TypeScript 1.0:
Hands-on & options in the market
Petru Jucovschi
Technical Lead for Windows & Windows Phone
Microsoft
petruj@microsoft.com
@petrujucovschi

2. Agenda
• TypeScript: Hands-on
• What is TypeScript and why? Other options?

3. Before going to TypeScript

4. Why JS?
• Zero JS frameworks manifesto:
http://bitworking.org/news/2014/05/zero_framework_manifesto

5. DEMO
TypeScript in action

6. What is TypeScript?
• An accurate static representation of JavaScript’s
dynamic runtime type system
• Types enabled tool = provides verification and
assistance, but not hard guarantees
• Cross-platform, cross-OS, cross-browser, cross-*
• Open Source and supports >350 JS frameworks

7. Tools?
• IDEs: VS, Monaco, Eclipse, IntelliJ, Resharper,
Sublime Text, Brackets, …
• Build: Heroku, Ruby, Grunt, ASP.NET, Node.JS, …
• Testing: Chutzpah, tsUnit, …

8. TypeScript and others
TypeScript builds on JavaScript - no JS interop issues
TypeScript vs Dart
• Dart = virtual machine. It interops with JavaScript ... but it's not JS.
TypeScript vs CoffeeScript
• CoffeeScript is a different language with a syntax of its own to learn
“… it doesn’t hide JavaScript (as CoffeeScript tends to do). - Ward Bell”

9. Roadmap
1:1 parity with ECMAScript 6
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Update for December 2014 specifications sign-off

10. Q & A