Build web animations with anime.js v4 — a fast, lightweight JavaScript animation library. Use this skill whenever the user wants to animate DOM elements, CSS properties, SVG (morphing, line drawing, motion paths), or plain JS objects; build timelines, staggered effects, scroll-triggered animations, draggable elements, spring physics, or animated text. Covers the v4 module API (animate, createTimeline, createTimer, createDraggable, onScroll, svg, text, stagger, utils, eases) and how to install it via npm or a CDN.