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Simple scroll-triggered reveal animations using AOS (Animate On Scroll). Use this skill when building marketing pages, landing pages, or content-heavy sites requiring basic fade/slide effects without complex animation orchestration. Triggers on tasks involving scroll animations,

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$ npx -y skills add freshtechbro/claudedesignskills --skill scroll-reveal-libraries --agent claude-code

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  • Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.Auto-invocation is when the right skill fires by itself at the right moment, driven by a FLOW.md router and a hook, instead of you invoking it by name. It is the difference between a skill being installed and a skill actually getting used.Read the full definition →
  • You can call itInvoke it directly when you want it.
  • Slash command/scroll-reveal-libraries

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Simple scroll-triggered reveal animations using AOS (Animate On Scroll). Use this skill when building marketing pages, landing pages, or content-heavy sites requiring basic fade/slide effects without complex animation orchestration. Triggers on tasks involving scroll animations,

SKILL.md

scroll-reveal-libraries.SKILL.md
name: scroll-reveal-libraries
description: Simple scroll-triggered reveal animations using AOS (Animate On Scroll). Use this skill when building marketing pages, landing pages, or content-heavy sites requiring basic fade/slide effects without complex animation orchestration. Triggers on tasks involving scroll animations, scroll-triggered reveals, AOS, simple animations, or basic scroll effects. Alternative to GSAP ScrollTrigger and Locomotive Scroll for simpler use cases. Compare with motion-framer for React-specific animations.

Scroll Reveal Libraries

Overview

This skill covers AOS (Animate On Scroll), a lightweight CSS-driven library for scroll-triggered animations. AOS excels at simple fade, slide, and zoom effects activated when elements enter the viewport.

**Key Features**:

  • **Minimal Setup**: Single JavaScript file + CSS
  • **Data Attribute API**: Configure animations in HTML
  • **Performance**: CSS-driven, GPU-accelerated animations
  • **50+ Built-in Animations**: Fades, slides, zooms, flips
  • **Framework Agnostic**: Works with vanilla JS, React, Vue, etc.

**When to Use**:

  • Marketing/landing pages with simple scroll effects
  • Content-heavy sites (blogs, documentation)
  • Quick prototypes requiring scroll animations
  • Projects where GSAP/Framer Motion complexity isn't needed

**When NOT to Use**:

  • Complex animation timelines or orchestration → Use GSAP ScrollTrigger
  • Physics-based animations → Use React Spring or Framer Motion
  • Precise scroll-synced animations → Use GSAP ScrollTrigger
  • Heavy interactive animations → Use Framer Motion

Core Concepts

Installation

**CDN (Quickest)**:

<head>
  <link rel="stylesheet" href="https://unpkg.com/aos@next/dist/aos.css" />
</head>
<body>
  <!-- Content with data-aos attributes -->

  <script src="https://unpkg.com/aos@next/dist/aos.js"></script>
  <script>
    AOS.init();
  </script>
</body>

**NPM/Yarn (Recommended)**:

npm install aos@next
# or
yarn add aos@next
import AOS from 'aos';
import 'aos/dist/aos.css';

AOS.init();

Basic Usage

Apply animations using the `data-aos` attribute:

<!-- Fade in -->
<div data-aos="fade-in">Content</div>

<!-- Fade up -->
<div data-aos="fade-up">Content</div>

<!-- Slide from right -->
<div data-aos="slide-left">Content</div>

<!-- Zoom in -->
<div data-aos="zoom-in">Content</div>

Configuration Options

**Global Configuration**:

AOS.init({
  // Animation settings
  duration: 800,  // Animation duration (ms): 0-3000
  delay: 0,       // Delay before animation (ms): 0-3000
  offset: 120,    // Offset from trigger point (px)
  easing: 'ease', // Easing function
  once: false,    // Animate only once (true) or every time (false)
  mirror: false,  // Animate out when scrolling past

  // Placement
  anchorPlacement: 'top-bottom', // Which position triggers animation

  // Performance
  disable: false,                // Disable on mobile/tablet
  startEvent: 'DOMContentLoaded', // Initialization event
  debounceDelay: 50,             // Window resize debounce
  throttleDelay: 99              // Scroll throttle
});

**Per-Element Overrides**:

<div
  data-aos="fade-up"
  data-aos-duration="1000"
  data-aos-delay="200"
  data-aos-offset="50"
  data-aos-easing="ease-in-out"
  data-aos-once="true"
  data-aos-mirror="true"
  data-aos-anchor-placement="center-bottom"
>
  Custom configured element
</div>

Common Patterns

1. Landing Page Hero Section

<section class="hero">
  <!-- Staggered heading words -->
  <h1
    data-aos="fade-down"
    data-aos-duration="800"
  >
    Welcome to the Future
  </h1>

  <!-- Delayed subheading -->
  <p
    data-aos="fade-up"
    data-aos-delay="200"
    data-aos-duration="600"
  >
    Transform your ideas into reality
  </p>

  <!-- CTA button -->
  <button
    data-aos="zoom-in"
    data-aos-delay="400"
    data-aos-duration="500"
  >
    Get Started
  </button>
</section>

2. Feature Cards Grid

<div class="features-grid">
  <!-- Stagger cards with increasing delays -->
  <div
    class="feature-card"
    data-aos="fade-up"
    data-aos-duration="600"
    data-aos-delay="0"
  >
    <h3>Feature 1</h3>
    <p>Description...</p>
  </div>

  <div
    class="feature-card"
    data-aos="fade-up"
    data-aos-duration="600"
    data-aos-delay="100"
  >
    <h3>Feature 2</h3>
    <p>Description...</p>
  </div>

  <div
    class="feature-card"
    data-aos="fade-up"
    data-aos-duration="600"
    data-aos-delay="200"
  >
    <h3>Feature 3</h3>
    <p>Description...</p>
  </div>
</div>

3. Alternating Content Sections

<!-- Content from left -->
<div class="section">
  <div
    class="content"
    data-aos="slide-right"
    data-aos-duration="800"
  >
    <h2>Section Title</h2>
    <p>Content slides in from left...</p>
  </div>
  <img
    src="image1.jpg"
    data-aos="fade-left"
    data-aos-delay="200"
  />
</div>

<!-- Content from right -->
<div class="section reverse">
  <img
    src="image2.jpg"
    data-aos="fade-right"
  />
  <div
    class="content"
    data-aos="slide-left"
    data-aos-duration="800"
    data-aos-delay="200"
  >
    <h2>Section Title</h2>
    <p>Content slides in from right...</p>
  </div>
</div>

4. Scroll-Triggered Testimonials

<div class="testimonials">
  <div
    class="testimonial"
    data-aos="zoom-in"
    data-aos-duration="500"
  >
    <blockquote>"Amazing product!"</blockquote>
    <cite>- John Doe</cite>
  </div>

  <div
    class="testimonial"
    data-aos="zoom-in"
    data-aos-duration="500"
    data-aos-delay="100"
  >
    <blockquote>"Exceeded expectations"</blockquote>
    <cite>- Jane Smith</cite>
  </div>
</div>

5. Custom Anchor Triggers

Trigger animations based on a different element's scroll position:

<!-- Fixed sidebar animates based on main content scroll -->
<div class="main-content">
  <div id="trigger-point" data-aos-id="sidebar-trigge
Read more
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