js实现3d轮播切换效果

<div class="carousel">
  <div class="carousel-item">Item 1</div>
  <div class="carousel-item">Item 2</div>
  <div class="carousel-item">Item 3</div>
</div>

.carousel {
  perspective: 1000px;
  width: 300px;
  height: 200px;
  margin: auto;
}

.carousel-item {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #3498db;
  color: white;
  text-align: center;
  line-height: 200px;
  transition: transform 1s;
}

.carousel-item:nth-child(1) { transform: rotateY(0deg) translateZ(300px); }
.carousel-item:nth-child(2) { transform: rotateY(120deg) translateZ(300px); }
.carousel-item:nth-child(3) { transform: rotateY(240deg) translateZ(300px); }

const carousel = document.querySelector('.carousel');
let currentIndex = 0;

function rotateCarousel() {
  const items = document.querySelectorAll('.carousel-item');
  items.forEach((item, index) => {
    item.style.transform = `rotateY(${(index - currentIndex) * 120}deg) translateZ(300px)`;
  });
  currentIndex = (currentIndex + 1) % items.length;
}

setInterval(rotateCarousel, 3000);

.carousel-item {
  will-change: transform;
}

function rotateCarousel() {
  requestAnimationFrame(() => {
    const items = document.querySelectorAll('.carousel-item');
    items.forEach((item, index) => {
      item.style.transform = `rotateY(${(index - currentIndex) * 120}deg) translateZ(300px)`;
    });
    currentIndex = (currentIndex + 1) % items.length;
  });
}