js 3d轮播

<div class="carousel">
  <div class="carousel__item">1</div>
  <div class="carousel__item">2</div>
  <div class="carousel__item">3</div>
  <div class="carousel__item">4</div>
</div>

.carousel {
  perspective: 1000px;
  width: 300px;
  height: 200px;
  position: relative;
}

.carousel__item {
  width: 100%;
  height: 100%;
  position: absolute;
  transition: transform 1s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 50px;
  color: white;
  background-color: rgba(0, 0, 0, 0.5);
}

.carousel__item:nth-child(1) { transform: rotateY(0deg) translateZ(300px); }
.carousel__item:nth-child(2) { transform: rotateY(90deg) translateZ(300px); }
.carousel__item:nth-child(3) { transform: rotateY(180deg) translateZ(300px); }
.carousel__item:nth-child(4) { transform: rotateY(270deg) translateZ(300px); }

let currentIndex = 0;
const items = document.querySelectorAll('.carousel__item');
const totalItems = items.length;

function rotateCarousel() {
  const angle = 90 * currentIndex;
  for (let i = 0; i < totalItems; i++) {
    items[i].style.transform = `rotateY(${angle}deg) translateZ(300px)`;
  }
  currentIndex = (currentIndex + 1) % totalItems;
}

setInterval(rotateCarousel, 3000);