React Native for Surface Duo
This video introduces Microsoft's React Native support for dual-screen devices:
There are two preview packages to help enhance React Native apps for dual-screen devices. Follow the instructions to download and install the Surface Duo emulator so you can try out the React Native support for the Surface Duo.
DualScreenInfo
A non-visual component that can be used to retrieve device information and adapt your layouts and views for dual-screens.
Learn more about DualScreenInfo
TwoPaneView
A React Native control that lays out two views side-by-side, taking account of the hinge area on the Surface Duo.
Samples
There are a number of React Native samples available to try out.