GSAP & Framer Motion — Scroll Animations Skill

Design Companion: This skill provides the technical implementation for scroll-driven motion. For the creative philosophy, design principles, and premium aesthetics that should guide how and when to animate, always cross-reference the premium-frontend-ui skill. Together they form a complete approach: premium-frontend-ui decides the what and why; this skill delivers the how.

Quick Library Selector

• GSAP →

  references/gsap.md

  — ScrollTrigger API, all recipes, React integration
• Framer Motion →

  references/framer.md

  — useScroll, useTransform, all recipes

Setup (Always Do First)

GSAP

npm install gsap

import gsap from 'gsap';
import { ScrollTrigger } from 'gsap/ScrollTrigger';
gsap.registerPlugin(ScrollTrigger); // MUST call before any ScrollTrigger usage

Framer Motion (Motion v12, 2025)

npm install motion   # new package name since mid-2025
# or: npm install framer-motion  — still works, same API

import { motion, useScroll, useTransform, useSpring } from 'motion/react';
// legacy: import { motion } from 'framer-motion'  — also valid

Workflow

1. Interpret the user's intent to identify if GSAP or Framer Motion is the best fit.
2. Read the relevant reference document in

   references/

   for detailed APIs and patterns.
3. Suggest the required package installation if not already present.
4. Implement the scaffold for the animation structure, adhering to the requested format (React components, hook requirements, or vanilla JS).
5. Apply the correct tools (scrolling vs in-view elements) ensuring accessibility options are present and hooks don't cause infinite re-renders.

The 5 Most Common Scroll Patterns

1. Fade-in on enter (GSAP)

gsap.from('.card', {
  opacity: 0, y: 50, stagger: 0.15, duration: 0.8,
  scrollTrigger: { trigger: '.card', start: 'top 85%' }
});

2. Fade-in on enter (Framer Motion)

<motion.div
  initial={{ opacity: 0, y: 40 }}
  whileInView={{ opacity: 1, y: 0 }}
  viewport={{ once: true, margin: '-80px' }}
  transition={{ duration: 0.6 }}
/>

3. Scrub / scroll-linked (GSAP)

gsap.to('.hero-img', {
  scale: 1.3, opacity: 0, ease: 'none',
  scrollTrigger: { trigger: '.hero', start: 'top top', end: 'bottom top', scrub: true }
});

4. Scroll-linked (Framer Motion)

const { scrollYProgress } = useScroll({ target: ref, offset: ['start end', 'end start'] });
const y = useTransform(scrollYProgress, [0, 1], [0, -100]);
return <motion.div style={{ y }} />;

5. Pinned timeline (GSAP)

const tl = gsap.timeline({
  scrollTrigger: { trigger: '.section', pin: true, scrub: 1, start: 'top top', end: '+=200%' }
});
tl.from('.title', { opacity: 0, y: 60 }).from('.img', { scale: 0.85 });

Critical Rules (Apply Always)

• GSAP: always call

  gsap.registerPlugin(ScrollTrigger)

  before using it
• GSAP scrub: always use

  ease: 'none'

  — easing feels wrong when scrub is active
• GSAP React: use

  useGSAP

  from

  @gsap/react

  , never plain

  useEffect

  — it auto-cleans ScrollTriggers
• GSAP debug: add

  markers: true

  during development; remove before production
• Framer:

  useTransform

  output must go into

  style

  prop of a

  motion.*

  element, not a plain div
• Framer Next.js: always add

  'use client'

  at top of any file using motion hooks
• Both: animate only

  transform

  and

  opacity

  — avoid

  width

  ,

  height

  ,

  box-shadow

• Accessibility: always check

  prefers-reduced-motion

  — see each reference file for patterns
• Premium polish: follow the premium-frontend-ui skill principles for motion timing, easing curves, and restraint — animation should enhance, never overwhelm

Copilot Prompting Tips

• Give Copilot the full selector, base image, and scroll range upfront — vague prompts produce vague code
• For GSAP, always specify: selector, start/end strings, whether you want scrub or toggleActions
• For Framer, always specify: which hook (useScroll vs whileInView), offset values, what to transform
• Paste the exact error message when asking

  /fix

  — Copilot fixes are dramatically better with real errors
• Use

  @workspace

  scope in Copilot Chat so it reads your existing component structure

Reference Files

references/gsap.md

references/framer.md

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