As far as I understand, you don't need to do this in react-native. Only when you want to use some special features. Or am I missing something?
But as we move further, we'll be looking into making the versions for both platform feel truly native, and that will require some changes to navigation components and the overall navigation paradigm (tabs vs. drawer, screens vs. cards etc.).
The platform differences are as much about design as about code, and I don't see how you can escape that work with any cross-platform framework. But React Native makes it very easy to implement in a way that lets us share all but a few components.
It'd mean this framework is supposed to be a higher level React Native implementation: that you can use everywhere you want to use React, not just mobile.
Yes, it's not possible. You can't just use your React code as React Native. There are many small API differences.
They are saying that from what they know, if you use React Native, you shouldn't have to recode your UI layer for different platforms.
Which is true, but the point parent misses, is that it might not be necessary if you just want a cross platform app, but it is needed if you also want it to behave more like each platform users are used to.
> With React and React Native, your web app can share most its logic with your iOS and Android apps, but the view layer needs to be implemented separately for each platform.
This is referring to web vs apps, in other words React vs React Native. That's the context of my reply. They are not talking about the (optional) differences within a React Native app to fit different platforms.