I resurrected an 8-year-old dead CSS library and gave it an engine
Summary
Vivace CSS is a lightweight animation library that enables composing entrances, transitions, and interactions directly in markup. It uses a small engine to determine when animations run (scroll, hover, click, focus) while pure CSS defines how they animate, and it emphasizes zero wrappers and no keyframes. The project provides a simple initialization flow, framework-agnostic usage, and a growing gallery and playground for exploring animation presets.