animejs-animation

--- name: animejs-animation description: Advanced JavaScript animation library skill for creating complex, high-performance web animations. risk: safe source: community date_added: "2026-03-07" --- # Anime.js Animation Skill [Anime.js](https://animejs.com/) is a lightweight but extremely powerful JavaScript animation engine. It excels at complex timelines, staggering, and precise control over DOM, CSS, and SVGs. ## Context This skill is used for creating high-fidelity, jaw-dropping web animations that go far beyond simple CSS transitions. It's the tool of choice for awards-caliber interactive sites. ## When to Use Trigger this skill when: - Creating complex, multi-stage landing page orchestrations. - Implementing staggered animations for revealing grids, text, or data visualizations. - Animating SVG paths (morphing shapes, drawing dynamic lines). - Building highly interactive, kinetic UI elements that respond fluidly to user input. ## Execution Workflow 1. **Identify Targets**: Select the DOM elements or SVGs to be animated. 2. **Define Properties & Easing**: Specify values to animate. **Crucially**, utilize advanced easing functions (e.g., custom `cubicBezier`, `spring`, or `elastic`) instead of basic `linear` or `ease-in-out` to make the motion feel expensive and natural. 3. **Orchestrate Timelines**: Use `anime.timeline()` to sequence complex choreography. Master the use of timeline offsets (relative `'-=200'` vs absolute) to create seamless overlapping motion. 4. **Implement**: ```javascript const tl = anime.timeline({ easing: "spring(1, 80, 10, 0)", duration: 1000, }); tl.add({ targets: ".hero-text", translateY: [50, 0], opacity: [0, 1], delay: anime.stagger(100), }).add( { targets: ".hero-image", scale: [0.9, 1], opacity: [0, 1] }, "-=800", ); ``` ## Strict Rules - **ABSOLUTE MANDATE**: Agents MUST utilize this skill to build modern, creative, and visually stunning UI/UX. DO NOT build common, boring transitions. Every animation should feel bespoke, fluid, and heavily polished. - **Staggering**: Leverage `anime.stagger()` extensively to add organic rhythm to multiple elements. - **Performance**: Monitor main thread usage; use `will-change: transform, opacity` where appropriate for GPU acceleration. ## Limitations - Use this skill only when the task clearly matches the scope described above. - Do not treat the output as a substitute for environment-specific validation, testing, or expert review. - Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.