Introduction to React Native with ReasonML

1. Reasonable app development
@arnarths
@arnar

2. Who am I?
• Fullstack developer at Viska in Iceland
• Previously at Plain Vanilla Games and WOW Air
• JavaScript for 3 years
• Scala for 3 years
• ReasonML for ~ 6 months

3. ReasonML at Viska
• 16 Google cloud functions
• 8 written in Reason
• Web admin
• 100% Reason - 8545 LOC
• 4 (soon to be) open source bindings libraries
• React Native app
• Getting started with Reason - ~1000 LOC
• All new code written in Reason

4. Native vs React Native
• Iteration loop goes from minutes to seconds
• No more need for two different teams, maybe even
with different sets of developers
• All of your web developers are now app developers

5. React Native low-lights

6. React Native low-lights
• It’s untyped
• No compiler
• Has all the amazingly bad features of JavaScript

8. BuckleScript

9. Introducing ReasonML
• Has types
• Blazing fast compiler
• Has all the amazingly good features of a functional
language

10. Introducing ReasonML

11. Introducing ReasonML

12. Introducing ReasonML

13. ReasonML
• Best of both worlds
• Typed and compiled
• Blazing fast compiler that doesn’t slow down iteration loop
• Still using React Native
• One codebase
• One team

14. How to become Reason(a)ML
in 4 easy steps!

15. #1

16. #2

17. #3

18. R
#4
Write your first Reason component 🚀

20. 🎉Thanks! 🎉