js图片左右循环轮播

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>图片轮播</title>
<style>
  #slider {
    width: 600px;
    overflow: hidden;
    position: relative;
  }
  #slider img {
    width: 100%;
    display: none;
  }
  #slider img.active {
    display: block;
  }
  .arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
  }
  #left-arrow {
    left: 10px;
  }
  #right-arrow {
    right: 10px;
  }
</style>
</head>
<body>

<div id="slider">
  <img src="image1.jpg" alt="Image 1" class="active">
  <img src="image2.jpg" alt="Image 2">
  <img src="image3.jpg" alt="Image 3">
  <span id="left-arrow" class="arrow">&#10094;</span>
  <span id="right-arrow" class="arrow">&#10095;</span>
</div>

<script>
  const slider = document.getElementById('slider');
  const images = slider.getElementsByTagName('img');
  const leftArrow = document.getElementById('left-arrow');
  const rightArrow = document.getElementById('right-arrow');
  let currentIndex = 0;

  function showImage(index) {
    for (let i = 0; i < images.length; i++) {
      images[i].classList.remove('active');
    }
    images[index].classList.add('active');
  }

  leftArrow.addEventListener('click', () => {
    currentIndex = (currentIndex - 1 + images.length) % images.length;
    showImage(currentIndex);
  });

  rightArrow.addEventListener('click', () => {
    currentIndex = (currentIndex + 1) % images.length;
    showImage(currentIndex);
  });

  // 自动轮播
  setInterval(() => {
    currentIndex = (currentIndex + 1) % images.length;
    showImage(currentIndex);
  }, 3000); // 每3秒切换一次
</script>

</body>
</html>