React Native Reanimated is a library for creating smooth animations and interactions in React Native applications, reimplementing the platform's Animated library with improved performance and developer experience.
The library addresses the challenge of building fluid, responsive animations in React Native by running animation logic on the native thread rather than the JavaScript thread, eliminating frame drops caused by JavaScript execution blocking. It achieves this through Worklets, a companion library that enables multi-threaded JavaScript execution. This architecture allows animations to remain smooth even when the main JavaScript thread is busy with other tasks. The tool provides gesture handling capabilities alongside animation primitives, enabling developers to create interactive experiences that respond immediately to user input.
Reanimated 4 requires the New React Native architecture and targets the three latest React Native versions, making it suitable for projects that have adopted or are planning to adopt the new architecture. Teams maintaining apps on the old React Native architecture should remain on the 3.x release line. The library is particularly valuable for applications requiring complex gesture-driven interactions, smooth scrolling animations, or other performance-sensitive animated effects where JavaScript thread blocking would otherwise cause visible jank.
The project maintains active development with regular updates to support new React Native releases and maintain compatibility with the evolving platform. The repository includes comprehensive documentation covering both Reanimated and Worklets APIs, alongside a showcase application demonstrating the library's capabilities. Community engagement is supported through a dedicated Discord channel for discussions and questions.
