Open Source JavaScript User Interface (UI) Apps for Android

One of the best navigation patterns on Android. This is a very simple JavaScript-only implementation of it for React Native. Animations are very important to create a great user experience. Stationary objects must overcome inertia as they start moving. Objects in motion have momentum and rarely come to a stop immediately. Animations allow you to convey physically believable motion in your interface. The Animated API is designed to concisely express a wide variety of interesting animation and interaction patterns in a very performant way. Animated focuses on declarative relationships between inputs and outputs, with configurable transforms in between, and start/stop methods to control time-based animation execution.