Feedback on the transition from a React webapp to a React Native app. These slides are from my talk for Facebook Developer Circles Paris at The Family. I will publish a Medium article soon...

1. From React to React Native
Axel Delafosse
CTO & Co-Founder @ Goosebump

2. Story
How did we end up using React Native?

3. Product

4. Pain
• Dev environment can go crazy (for no reason)
• Differences between iOS and Android

5. Gain
"It’s the nature of programming languages to
make most people satisfied with whatever they
currently use."
- Paul Graham, Beating The Averages

6. Code sharing?
YES! You can share code between React and
React Native but you can’t share everything —
and you don’t want to

7. Differences
View
Flexbox

8. Shadow
box-shadow CSS React Native - iOS
React Native - Android

9. styled-components

10. Same code in render()

11. Media queries

12. Router/Navigation

13. StatusBar

14. Performances
Don’t block the JS thread
Deeply understand the React component lifecycle
Use shouldComponentUpdate() or
PureComponent to avoid useless re-render
Don’t do a lot of work inside render()

15. Tips
Start Metro Bundler and
reset cache
Fresh install Cacaopods (native module
linking on iOS)
Hot Module Replacement
stopped working…

16. What’s next?
Animated API
Detox tests
?

17. Thank you!
goosebu.mp/beta
https://www.goosebump.com
https://www.axeldelafosse.com