anime.js Best Practices

A comprehensive skill/reference guide for implementing animations with anime.js v4 - the lightweight JavaScript animation engine created by Julian Garnier.

What is this?

This repository contains best practices, patterns, and comprehensive API documentation for anime.js v4. It's designed to be used as a skill for AI coding assistants (Claude Code, Cursor, etc.) but also serves as a standalone reference for developers.

Quick Start

npm install animejs

import { waapi, stagger } from 'animejs';

// Hardware-accelerated animation (recommended for most use cases)
waapi.animate('.element', {
  translateX: 200,
  opacity: [0, 1],
  delay: stagger(100),
  duration: 800,
  ease: 'outExpo'
});

Repository Structure

animejs-best-practices/
├── SKILL.md                 # Main skill file with core patterns
├── agents/                  # AI agent definitions
├── examples/                # Working code examples
│   ├── basic-animation.js
│   ├── timeline-sequence.js
│   ├── react-integration.jsx
│   └── scroll-reveal.js
└── references/
    ├── docs/
    │   ├── [anime.js v4 docs]   # 18 files from animejs.com
    │   └── web-animations-api/  # MDN Web Animations API
    │       ├── guides/          # Concepts, keyframes, tips
    │       ├── interfaces/      # Animation, KeyframeEffect, Timelines
    │       └── methods/         # Element.animate(), getAnimations()
    └── [best practice guides]

Key Concepts

WAAPI-First Approach

Always prefer waapi.animate() over animate() unless you need JS engine features:

Use waapi.animate()	Use animate()
CSS transforms/opacity	500+ targets
Bundle size matters (3KB vs 10KB)	JS objects, Canvas, WebGL
Need hardware acceleration	Complex timeline orchestration
Simple entrance animations	SVG path morphing

Critical: Milliseconds, Not Seconds!

// WRONG - animation barely visible (2ms)
waapi.animate('.el', { opacity: 1, duration: 2 });

// CORRECT - 2 second animation
waapi.animate('.el', { opacity: 1, duration: 2000 });

Documentation Coverage

anime.js v4 (from animejs.com)

• Core: Timer, Animation, Timeline
• Interactive: Animatable, Draggable
• Layout: FLIP animations, enter/exit states
• Events: ScrollObserver, thresholds, sync modes
• SVG: morphTo, createDrawable, createMotionPath
• Text: splitText for character/word/line animations
• Utilities: stagger, helpers ($, get, set, random, math functions)
• Easings: Built-in eases, cubic-bezier, spring physics
• WAAPI: Hardware-accelerated Web Animations API wrapper
• Engine: Global configuration, time units, FPS

Native Web Animations API (from MDN)

• Guides: Overview, concepts, keyframe formats, tips and tricks
• Interfaces: Animation, AnimationEffect, KeyframeEffect, AnimationTimeline, DocumentTimeline, ScrollTimeline, ViewTimeline
• Methods: Element.animate(), Element.getAnimations(), Document.getAnimations()
• Events: AnimationEvent, AnimationPlaybackEvent

Using as an AI Skill

Claude Code

Add this repository as a skill in your Claude Code configuration to get anime.js best practices automatically applied to your animation code.

Other AI Assistants

Reference the SKILL.md file in your system prompt or context to enable anime.js expertise.

Attribution

anime.js

• Created by Julian Garnier
• Official website: animejs.com
• Official repository: github.com/juliangarnier/anime
• Documentation source: animejs.com/documentation

Web Animations API

• Documentation from MDN Web Docs
• Source: MDN Web Animations API
• Licensed under CC-BY-SA 2.5

License

This skill/reference guide is released under the MIT License.

Note: anime.js itself is licensed under the MIT License. See the anime.js repository for its license terms.

Contributing

Contributions are welcome! Please feel free to submit issues or pull requests to improve the documentation, add examples, or fix errors.