js原生轮播图下载

<div class="carousel">
  <div class="carousel-inner">
    <img src="image1.jpg" alt="Image 1">
    <img src="image2.jpg" alt="Image 2">
    <img src="image3.jpg" alt="Image 3">
  </div>
  <button class="prev">&#10094;</button>
  <button class="next">&#10095;</button>
</div>

.carousel {
  position: relative;
  width: 80%;
  margin: auto;
}

.carousel-inner {
  position: relative;
  overflow: hidden;
  width: 100%;
}

.carousel-inner img {
  display: none;
  width: 100%;
}

.carousel-inner img.active {
  display: block;
}

.prev, .next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 16px;
  margin-top: -22px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
}

.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

.prev:hover, .next:hover {
  background-color: rgba(0,0,0,0.8);
}

let currentIndex = 0;
const images = document.querySelectorAll('.carousel-inner img');
const totalImages = images.length;
const nextButton = document.querySelector('.next');
const prevButton = document.querySelector('.prev');

function showImage(index) {
  images.forEach((img, i) => {
    img.classList.toggle('active', i === index);
  });
}

function nextImage() {
  currentIndex = (currentIndex + 1) % totalImages;
  showImage(currentIndex);
}

function prevImage() {
  currentIndex = (currentIndex - 1 + totalImages) % totalImages;
  showImage(currentIndex);
}

nextButton.addEventListener('click', nextImage);
prevButton.addEventListener('click', prevImage);

// 自动轮播
setInterval(nextImage, 3000);