Facebook launched React-Native with the motto learn once, write anywhere instead of write once, run anywhere. With that, you might be surprised to learn that Twitter and Uber both have implementations of React Native *web-apps* in production. Thanks to the open-source library titled react-native-web, shared component libraries amongst mobile and web teams are becoming more popular. In this talk, we’ll dive into how react-native-web works, how it can help your organization, alternative approaches to shared component libraries, and any gotchas you might encounter along the way.