js轮播图循环滚动代码

<div class="carousel">
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="image1.jpg" alt="Image 1">
    </div>
    <div class="carousel-item">
      <img src="image2.jpg" alt="Image 2">
    </div>
    <div class="carousel-item">
      <img src="image3.jpg" alt="Image 3">
    </div>
  </div>
  <!-- 可选的控制按钮 -->
  <button class="carousel-control prev">&#10094;</button>
  <button class="carousel-control next">&#10095;</button>
</div>

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

.carousel-inner {
  display: flex;
  transition: transform 0.5s ease-in-out;
}

.carousel-item {
  min-width: 100%;
  box-sizing: border-box;
}

.carousel-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  padding: 10px;
  cursor: pointer;
}

.prev {
  left: 0;
}

.next {
  right: 0;
}

document.addEventListener('DOMContentLoaded', function() {
  const carouselInner = document.querySelector('.carousel-inner');
  const items = document.querySelectorAll('.carousel-item');
  let currentIndex = 0;
  const totalItems = items.length;

  function moveToIndex(index) {
    if (index < 0) {
      index = totalItems - 1;
    } else if (index >= totalItems) {
      index = 0;
    }
    currentIndex = index;
    const offset = -currentIndex * 100;
    carouselInner.style.transform = `translateX(${offset}%)`;
  }

  function nextItem() {
    moveToIndex(currentIndex + 1);
  }

  function prevItem() {
    moveToIndex(currentIndex - 1);
  }

  document.querySelector('.carousel-control.next').addEventListener('click', nextItem);
  document.querySelector('.carousel-control.prev').addEventListener('click', prevItem);

  // 自动播放功能
  setInterval(nextItem, 3000); // 每3秒切换一次
});