motionSafety 95Repository ShareFavorite skill

Core Patterns

Basic Animation

import { motion } from "motion/react"

<motion.div
  initial={{ opacity: 0, y: 20 }}
  animate={{ opacity: 1, y: 0 }}
  exit={{ opacity: 0 }}
  transition={{ duration: 0.3 }}
/>

Gestures

<motion.button
  whileHover={{ scale: 1.05 }}
  whileTap={{ scale: 0.95 }}
  whileInView={{ opacity: 1 }}
/>

Layout Animations

// Auto-animate position/size changes
<motion.div
  layout
  layoutDependency={isOpen} // Performance: only measure when this changes
/>

Use for: expanding panels, grid reordering, responsive shifts, tab switching.

Variants (Reusable States)

const variants = {
  hidden: { opacity: 0, y: 20 },
  visible: { opacity: 1, y: 0 }
}

<motion.div
  variants={variants}
  initial="hidden"
  animate="visible"
/>

Stagger Children

<motion.ul
  variants={{
    visible: { transition: { staggerChildren: 0.1 } }
  }}
  initial="hidden"
  animate="visible"
>
  {items.map(item => (
    <motion.li
      key={item.id}
      variants={{
        visible: { opacity: 1, x: 0 },
        hidden: { opacity: 0, x: -20 }
      }}
    />
  ))}
</motion.ul>

Exit Animations

import { AnimatePresence } from "motion/react"

<AnimatePresence>
  {isVisible && (
    <motion.div
      key="modal" // REQUIRED
      initial={{ opacity: 0 }}
      animate={{ opacity: 1 }}
      exit={{ opacity: 0 }}
    />
  )}
</AnimatePresence>

Scroll Triggers

<motion.div
  initial={{ opacity: 0, y: 50 }}
  whileInView={{ opacity: 1, y: 0 }}
  viewport={{ once: true, amount: 0.5 }}
/>

Performance

GPU-Accelerated Properties

✅ Use: x, y, scale, rotate, opacity
❌ Avoid: width, height, top, left

// ✅ Good
<motion.div animate={{ x: 100, scale: 1.2 }} />

// ❌ Bad - triggers layout
<motion.div animate={{ width: 200 }} />

Motion Values (No Re-renders)

import { useMotionValue } from "motion/react"

const x = useMotionValue(0)
x.set(100) // Updates without React re-render

return <motion.div style={{ x }} />

Transition Types

Common Mistakes

❌ Missing key in AnimatePresence

<AnimatePresence>
  {show && <motion.div />} // Missing key!
</AnimatePresence>

✅ Always add unique key

<AnimatePresence>
  {show && <motion.div key="unique" />}
</AnimatePresence>

❌ Animating layout properties

<motion.div animate={{ width: 200 }} />

✅ Use transforms

<motion.div animate={{ scaleX: 2 }} />

Resources

• Docs: motion.dev/docs/react
• Context7: /websites/motion_dev_react