Let us know how we can improve. Vote on existing ideas or suggest new ones.
https://snack.expo.io - Expo has a split mode and a browser based device preview from https://appetize.io. We would need to either have the user download an app for a live preview or do someting simliar to the above (or both).
You would also likely need to use the hierarchy as the primary way to assemble components as drag and drop likely won’t work.