framer-motion-animations（Framer motion animations 前端）

Framer Motion Animations

Installation

npm install framer-motion

Basic Fade In

'use client';

import { motion } from 'framer-motion';

export function FadeIn({ children }: { children: React.ReactNode }) {
  return (
    <motion.div
      initial={{ opacity: 0, y: 20 }}
      animate={{ opacity: 1, y: 0 }}
      transition={{ duration: 0.5 }}
    >
      {children}
    </motion.div>
  );
}

Staggered Children

'use client';

import { motion } from 'framer-motion';

const container = {
  hidden: { opacity: 0 },
  show: {
    opacity: 1,
    transition: {
      staggerChildren: 0.1,
    },
  },
};

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

export function StaggeredList({ items }: { items: React.ReactNode[] }) {
  return (
    <motion.ul
      variants={container}
      initial="hidden"
      animate="show"
      className="space-y-4"
    >
      {items.map((child, i) => (
        <motion.li key={i} variants={item}>
          {child}
        </motion.li>
      ))}
    </motion.ul>
  );
}

Scroll-Triggered Animation

'use client';

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

export function ScrollReveal({ children }: { children: React.ReactNode }) {
  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 } : { opacity: 0, y: 50 }}
      transition={{ duration: 0.6, ease: 'easeOut' }}
    >
      {children}
    </motion.div>
  );
}

Hero Animation

'use client';

import { motion } from 'framer-motion';

export function HeroSection() {
  return (
    <section className="min-h-screen flex items-center">
      <div className="container mx-auto px-4">
        <motion.h1
          initial={{ opacity: 0, y: 30 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ duration: 0.8, delay: 0.2 }}
          className="text-5xl md:text-7xl font-bold"
        >
          Pilates & Yoga
        </motion.h1>

        <motion.p
          initial={{ opacity: 0, y: 30 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ duration: 0.8, delay: 0.4 }}
          className="text-xl mt-6 text-muted-foreground"
        >
          Transform your body and mind
        </motion.p>

        <motion.div
          initial={{ opacity: 0, y: 30 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ duration: 0.8, delay: 0.6 }}
          className="mt-8 flex gap-4"
        >
          <Button>Book Now</Button>
          <Button variant="outline">Learn More</Button>
        </motion.div>
      </div>
    </section>
  );
}

Card Hover Effect

'use client';

import { motion } from 'framer-motion';

export function AnimatedCard({ children }: { children: React.ReactNode }) {
  return (
    <motion.div
      whileHover={{ y: -5, boxShadow: '0 10px 30px rgba(0,0,0,0.1)' }}
      transition={{ duration: 0.2 }}
      className="bg-card rounded-lg p-6 border"
    >
      {children}
    </motion.div>
  );
}

Section Wrapper

'use client';

import { motion } from 'framer-motion';
import { useInView } from 'framer-motion';
import { useRef } from 'react';

interface SectionProps {
  children: React.ReactNode;
  className?: string;
  delay?: number;
}

export function AnimatedSection({ children, className, delay = 0 }: SectionProps) {
  const ref = useRef(null);
  const isInView = useInView(ref, { once: true, margin: '-50px' });

  return (
    <motion.section
      ref={ref}
      initial={{ opacity: 0, y: 40 }}
      animate={isInView ? { opacity: 1, y: 0 } : {}}
      transition={{ duration: 0.6, delay, ease: 'easeOut' }}
      className={className}
    >
      {children}
    </motion.section>
  );
}

Counter Animation

'use client';

import { motion, useMotionValue, useTransform, animate } from 'framer-motion';
import { useEffect } from 'react';

interface CounterProps {
  from: number;
  to: number;
  duration?: number;
}

export function AnimatedCounter({ from, to, duration = 2 }: CounterProps) {
  const count = useMotionValue(from);
  const rounded = useTransform(count, (latest) => Math.round(latest));

  useEffect(() => {
    const controls = animate(count, to, { duration });
    return controls.stop;
  }, [count, to, duration]);

  return <motion.span>{rounded}</motion.span>;
}

// Usage
<div className="text-4xl font-bold">
  <AnimatedCounter from={0} to={500} />+
  <span className="text-sm">Happy Clients</span>
</div>

Page Transition Wrapper

'use client';

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

export 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>
  );
}

Accordion Animation

'use client';

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

interface AccordionItemProps {
  title: string;
  children: React.ReactNode;
}

export function AccordionItem({ title, children }: AccordionItemProps) {
  const [isOpen, setIsOpen] = useState(false);

  return (
    <div className="border-b">
      <button
        onClick={() => setIsOpen(!isOpen)}
        className="w-full py-4 flex justify-between items-center"
      >
        <span className="font-medium">{title}</span>
        <motion.span
          animate={{ rotate: isOpen ? 180 : 0 }}
          transition={{ duration: 0.2 }}
        >
          ▼
        </motion.span>
      </button>

      <AnimatePresence>
        {isOpen && (
          <motion.div
            initial={{ height: 0, opacity: 0 }}
            animate={{ height: 'auto', opacity: 1 }}
            exit={{ height: 0, opacity: 0 }}
            transition={{ duration: 0.3 }}
            className="overflow-hidden"
          >
            <div className="pb-4">{children}</div>
          </motion.div>
        )}
      </AnimatePresence>
    </div>
  );
}

Performance Tips

1. Use layoutId for shared element transitions
2. Use useReducedMotion() to respect user preferences
3. Avoid animating layout properties (width, height) - use transforms
4. Use will-change sparingly via Tailwind's will-change-transform
5. Prefer opacity and transform animations (GPU accelerated)