Discover how Meta leverages JavaScript libraries and techniques to enhance mobile app development efficiency in this 43-minute conference talk from F8 2015. Explore the introduction of React Native and Relay, learning about the factors that contribute to a good and fast app experience. Delve into the advantages of React, the challenges of native development, and the use of platform-specific components. Examine the asynchronous environment and incremental adoption strategies. Witness demos showcasing JavaScript implementation in mobile app development, gaining insights into modern web techniques applied to mobile platforms.