CSS animations and transitions provide hardware-accelerated motion for web interfaces using keyframes, transitions, transforms, and modern scroll-driven and view transition APIs. Animate only composite properties (transform, opacity, filter) for smooth 60fps performance, and always respect prefers-reduced-motion.
The browser rendering pipeline has four stages: Style, Layout, Paint, and Composite. Animating composite-only properties skips Layout and Paint entirely, running on the GPU compositor thread. This is the single most important performance principle for CSS animation.
Modern CSS adds two powerful APIs: scroll-driven animations link keyframe progress to scroll position or element visibility instead of time, and the View Transitions API creates snapshot-based animated transitions between DOM states for both SPAs and MPAs.
Animaciones CSS, transiciones, fotogramas clave y API de movimiento modernas. Úselo al agregar animaciones, transiciones, efectos de desplazamiento o ver transiciones. Úselo para animación css, transición, fotogramas clave, transiciones de vista, animación de desplazamiento, transformación, preferencia de movimiento, línea de tiempo de animación. Fuente: oakoss/agent-skills.