  animate={{ opacity: 1 }}
  transition={{ duration: 0.5 }}
>
  Hello World
</motion.div>

); }


## Core Concepts

### Motion Components

```tsx
import { motion } from 'framer-motion';

// Any HTML element
<motion.div />
<motion.span />
<motion.button />
<motion.svg />
<motion.path />

// Custom components
const MotionCard = motion(Card);

Animate Prop

// Simple values
<motion.div animate={{ x: 100 }} />

// Multiple properties
<motion.div
  animate={{
    x: 100,
    opacity: 0.5,
    scale: 1.2,
    rotate: 45,
  }}
/>

// Keyframes
<motion.div
  animate={{
    x: [0, 100, 0],
    opacity: [1, 0.5, 1],
  }}
/>

Initial State

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

// Disable initial animation
<motion.div initial={false} animate={{ x: 100 }} />

Exit Animations

import { motion, AnimatePresence } from 'framer-motion';

function Modal({ isOpen, onClose }) {
  return (
    <AnimatePresence>
      {isOpen && (
        <motion.div
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          exit={{ opacity: 0 }}
          className="modal-backdrop"
          onClick={onClose}
        >
          <motion.div
            initial={{ scale: 0.9, opacity: 0 }}
            animate={{ scale: 1, opacity: 1 }}
            exit={{ scale: 0.9, opacity: 0 }}
            onClick={(e) => e.stopPropagation()}
            className="modal-content"
          >
            Modal content
          </motion.div>
        </motion.div>
      )}
    </AnimatePresence>
  );
}

Transitions

Basic Transitions

<motion.div
  animate={{ x: 100 }}
  transition={{
    duration: 0.5,
    delay: 0.2,
    ease: 'easeInOut',
  }}
/>

Spring Physics

<motion.div
  animate={{ x: 100 }}
  transition={{
    type: 'spring',
    stiffness: 100,
    damping: 10,
    mass: 1,
  }}
/>

// Bounce effect
<motion.div
  animate={{ y: 0 }}
  initial={{ y: -100 }}
  transition={{
    type: 'spring',
    bounce: 0.5,
  }}
/>

Tween (Keyframe)

<motion.div
  animate={{ x: 100 }}
  transition={{
    type: 'tween',
    ease: 'easeInOut',
    duration: 0.5,
  }}
/>

// Custom easing
<motion.div
  transition={{
    ease: [0.17, 0.67, 0.83, 0.67], // Cubic bezier
  }}
/>

Per-Property Transitions

<motion.div
  animate={{ x: 100, opacity: 0 }}
  transition={{
    x: { type: 'spring', stiffness: 100 },
    opacity: { duration: 0.2 },
  }}
/>

Variants

Basic Variants

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

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

Orchestration

const container = {
  hidden: { opacity: 0 },
  visible: {
    opacity: 1,
    transition: {
      staggerChildren: 0.1,
      delayChildren: 0.3,
    },
  },
};

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

function List({ items }) {
  return (
    <motion.ul
      variants={container}
      initial="hidden"
      animate="visible"
    >
      {items.map((item) => (
        <motion.li key={item.id} variants={item}>
          {item.text}
        </motion.li>
      ))}
    </motion.ul>
  );
}

Dynamic Variants

const variants = {
  hidden: { opacity: 0 },
  visible: (custom: number) => ({
    opacity: 1,
    transition: { delay: custom * 0.1 },
  }),
};

{items.map((item, i) => (
  <motion.div
    key={item.id}
    custom={i}
    variants={variants}
    initial="hidden"
    animate="visible"
  />
))}

Gestures

Hover

<motion.button
  whileHover={{ scale: 1.05 }}
  whileTap={{ scale: 0.95 }}
>
  Click me
</motion.button>

// With variants
<motion.div
  whileHover="hover"
  variants={{
    hover: { scale: 1.1, rotate: 5 },
  }}
/>

Tap/Click

<motion.div
  whileTap={{ scale: 0.9 }}
  onTap={() => console.log('Tapped!')}
  onTapStart={() => console.log('Tap started')}
  onTapCancel={() => console.log('Tap cancelled')}
/>

Drag

<motion.div
  drag
  dragConstraints={{ left: 0, right: 300, top: 0, bottom: 300 }}
  dragElastic={0.2}
  dragMomentum={false}
  whileDrag={{ scale: 1.1 }}
  onDragStart={(event, info) => console.log('Drag started')}
  onDrag={(event, info) => console.log('Dragging', info.point)}
  onDragEnd={(event, info) => console.log('Drag ended')}
/>

// Constrain to parent
<motion.div ref={constraintsRef}>
  <motion.div drag dragConstraints={constraintsRef} />
</motion.div>

// Drag axis
<motion.div drag="x" /> // Horizontal only
<motion.div drag="y" /> // Vertical only

Focus

<motion.input
  whileFocus={{ scale: 1.02, borderColor: '#3b82f6' }}
/>

Layout Animations

Basic Layout

<motion.div layout>
  {isExpanded ? 'Expanded content' : 'Collapsed'}
</motion.div>

Shared Layout

function Tabs({ tabs, activeTab, setActiveTab }) {
  return (
    <div className="tabs">
      {tabs.map((tab) => (
        <button
          key={tab.id}
          onClick={() => setActiveTab(tab.id)}
          className="tab"
        >
          {tab.label}
          {activeTab === tab.id && (
            <motion.div
              layoutId="underline"
              className="underline"
            />
          )}
        </button>
      ))}
    </div>
  );
}

Layout Groups

import { LayoutGroup } from 'framer-motion';

<LayoutGroup>
  <motion.div layout />
  <motion.div layout />
</LayoutGroup>

Layout Transition

<motion.div
  layout
  transition={{
    layout: { duration: 0.3, ease: 'easeOut' },
  }}
/>

Scroll Animations

Scroll-Linked Values

import { motion, useScroll, useTransform } from 'framer-motion';

function ParallaxHeader() {
  const { scrollY } = useScroll();

  const y = useTransform(scrollY, [0, 300], [0, -100]);
  const opacity = useTransform(scrollY, [0, 300], [1, 0]);

  return (
    <motion.header style={{ y, opacity }}>
      <h1>Parallax Header</h1>
    </motion.header>
  );
}

Scroll Progress

function ProgressBar() {
  const { scrollYProgress } = useScroll();

  return (
    <motion.div
      className="progress-bar"
      style={{ scaleX: scrollYProgress }}
    />
  );
}

Scroll Container

function ScrollContainer() {
  const containerRef = useRef(null);
  const { scrollYProgress } = useScroll({
    container: containerRef,
  });

  return (
    <div ref={containerRef} style={{ overflow: 'scroll', height: 400 }}>
      {/* Content */}
    </div>
  );
}

In View Animation

import { motion, useInView } from 'framer-motion';

function FadeInSection({ children }) {
  const ref = useRef(null);
  const isInView = useInView(ref, { once: true, margin: '-100px' });

  return (
    <motion.div
      ref={ref}
      initial={{ opacity: 0, y: 50 }}
      animate={isInView ? { opacity: 1, y: 0 } : {}}
      transition={{ duration: 0.5 }}
    >
      {children}
    </motion.div>
  );
}

whileInView

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

Animation Controls

useAnimation

import { motion, useAnimation } from 'framer-motion';

function Component() {
  const controls = useAnimation();

  async function sequence() {
    await controls.start({ x: 100 });
    await controls.start({ y: 100 });
    await controls.start({ x: 0, y: 0 });
  }

  return (
    <motion.div animate={controls}>
      <button onClick={sequence}>Start Sequence</button>
    </motion.div>
  );
}

Start/Stop

const controls = useAnimation();

// Start animation
controls.start({ x: 100 });

// Start with variants
controls.start('visible');

// Stop animation
controls.stop();

// Set immediately (no animation)
controls.set({ x: 0 });

SVG Animations

Path Drawing

<motion.svg viewBox="0 0 100 100">
  <motion.path
    d="M10 10 L90 10 L90 90 L10 90 Z"
    initial={{ pathLength: 0 }}
    animate={{ pathLength: 1 }}
    transition={{ duration: 2, ease: 'easeInOut' }}
    stroke="#000"
    strokeWidth="2"
    fill="none"
  />
</motion.svg>

Circle Progress

function CircleProgress({ progress }) {
  return (
    <svg viewBox="0 0 100 100">
      <motion.circle
        cx="50"
        cy="50"
        r="40"
        stroke="#3b82f6"
        strokeWidth="8"
        fill="none"
        initial={{ pathLength: 0 }}
        animate={{ pathLength: progress }}
        transition={{ duration: 0.5 }}
        style={{
          rotate: -90,
          transformOrigin: '50% 50%',
        }}
      />
    </svg>
  );
}

Page Transitions

Next.js App Router

// app/template.tsx
'use client';

import { motion } from 'framer-motion';

export default function Template({ children }: { children: React.ReactNode }) {
  return (
    <motion.div
      initial={{ opacity: 0, y: 20 }}
      animate={{ opacity: 1, y: 0 }}
      exit={{ opacity: 0, y: 20 }}
      transition={{ duration: 0.3 }}
    >
      {children}
    </motion.div>
  );
}

With AnimatePresence

'use client';

import { AnimatePresence, motion } from 'framer-motion';
import { usePathname } from 'next/navigation';

export default function PageTransition({
  children,
}: {
  children: React.ReactNode;
}) {
  const pathname = usePathname();

  return (
    <AnimatePresence mode="wait">
      <motion.div
        key={pathname}
        initial={{ opacity: 0 }}
        animate={{ opacity: 1 }}
        exit={{ opacity: 0 }}
        transition={{ duration: 0.3 }}
      >
        {children}
      </motion.div>
    </AnimatePresence>
  );
}

Performance

Reduce Motion

import { useReducedMotion } from 'framer-motion';

function Component() {
  const shouldReduceMotion = useReducedMotion();

  return (
    <motion.div
      animate={{ x: shouldReduceMotion ? 0 : 100 }}
      transition={{ duration: shouldReduceMotion ? 0 : 0.5 }}
    />
  );
}

Hardware Acceleration

// Use transform properties for GPU acceleration
<motion.div
  animate={{
    x: 100,        // Good - uses transform
    scale: 1.2,    // Good - uses transform
    opacity: 0.5,  // Good - composited
  }}
/>

// Avoid animating layout properties
<motion.div
  animate={{
    width: 200,    // Avoid - triggers layout
    height: 200,   // Avoid - triggers layout
  }}
/>

Best Practices

Use layout for size changes - Smooth without layout thrashing
Prefer spring for natural feel - More organic than tween
Stagger children in lists - Better visual hierarchy
Use variants for complex animations - Cleaner code
Respect reduced motion - Accessibility

Common Mistakes

Mistake	Fix
Missing AnimatePresence	Wrap exit animations
Animating layout properties	Use transform instead
Key missing in lists	Add unique keys
No initial state	Add initial prop
Heavy animations	Use will-change sparingly

Reference Files

references/variants.md - Complex variants
references/gestures.md - Gesture patterns
references/scroll.md - Scroll animations

framer-motion

Framer Motion

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