Velocity.js
Velocity.js is a JavaScript animation library that provides high-performance, hardware-accelerated animations for web interfaces. It offers a jQuery-like syntax for animating CSS properties and SVG attributes, with features like color animation, transforms, and scrolling effects. It is designed to be fast and lightweight, often outperforming CSS animations and other libraries in complex scenarios.
Developers should use Velocity.js when they need smooth, performant animations in web applications, especially for UI interactions, transitions, and complex sequences that require precise control. It is ideal for projects where jQuery is already in use, as it integrates seamlessly, or when CSS animations fall short in terms of performance or feature support, such as animating SVG or handling physics-based motion.