My Dreamforce '15 presentation which discusses how we can use TypeScript in Visualforce. The video is here; http://salesforce.vidyard.com/watch/XT20D_JUgU4jBe5SjHy_Rg

1. Making Visualforce RemoteActions
Bulletproof with TypeScript
Simon Goodyear
Beaufort 12
@simongoodyear

2. Simon Goodyear
Co-Founder, Beaufort 12

3. Demo
The Problem

4. Root Cause Analysis
JavaScript is not metadata aware

5. Making JavaScript Metadata Aware
What we need Where we get it
Method Signatures Tooling API
Custom Apex Types Tooling API
SObjects Standard API

6. Making JavaScript Metadata Aware
JavaScript is loosely typed

7. What is TypeScript?
“TypeScript is a typed superset of JavaScript that compiles to plain JavaScript”
“…a symantic subset of JavaScript; the sensical subset” – Anders Hejlsberg
Aimed at improving the development experience for JavaScript

8. What is TypeScript?
Strongly typed. Tools perform type inference.
Modules, Classes & Interfaces
4 primitives: string, number, boolean, any
TypeScriptLang.org

9. Demo
Introduction to TypeScript

10. Joining the Dots
Represent metadata as classes in TypeScript
• We need tools to do this
We no longer write JavaScript
• TypeScript only now
TypeScript is compiled before deployment
• And thus type checked

11. Demo
Joining the dots

12. Where Next?
Better flow for developers
• Create a grunt task
• Automatically generate d.ts files on metadata changes
Improved support of metadata
• Inner classes
• Namespace support
Integration with continuous integration tools
Whatever else you can imagine

13. 3 Simple Points
JavaScript is not aware of the Salesforce metadata
All the metadata is exposed via the Tooling and Standard APIs
We can make TypeScript aware of the Salesforce metadata

14. Resources
typescriptlang.org
blogs.msdn.com/b/typescript
channel9.msdn.com/Tags/typescript
definitelytyped.org
github.com/Microsoft/TypeScript-Sublime-Plugin

15. Thank you