LottieFiles

Applies motion design principles to create emotionally-driven, technically sound animations and transitions. Provides timing, easing, choreography, and Disney animation principles adapted for UI. Use when creating animations, transitions, micro-interactions, loading states, page transitions, scroll-triggered effects, or any motion work. Works with CSS, Framer Motion, GSAP, Lottie, Spring, or any animation system.

Implement Lottie animations using dotLottie runtimes (@lottiefiles/dotlottie-web and @lottiefiles/dotlottie-react). Use when building, debugging, or optimizing dotLottie or Lottie animations in web projects, including vanilla JS, React, and Next.js. Covers package selection, Web Workers, state machines, theming, dynamic slot overriding, performance best practices, and common patterns.