js左右按钮切换图片

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Image Slider</title>
<style>
  #slider {
    width: 300px;
    overflow: hidden;
  }
  #slider img {
    width: 100%;
    display: none;
  }
  #slider img.active {
    display: block;
  }
</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">
</div>

<button onclick="prevImage()">Prev</button>
<button onclick="nextImage()">Next</button>

<script>
  let images = document.querySelectorAll('#slider img');
  let currentIndex = 0;

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

  function nextImage() {
    currentIndex = (currentIndex + 1) % images.length;
    showImage(currentIndex);
  }

  function prevImage() {
    currentIndex = (currentIndex - 1 + images.length) % images.length;
    showImage(currentIndex);
  }
</script>

</body>
</html>