js鼠标滑过显示图片

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Mouse Hover Image Display</title>
<style>
  .thumbnail {
    width: 100px;
    height: 100px;
    background-color: #ccc;
    margin: 10px;
    display: inline-block;
    position: relative;
  }
  .thumbnail img {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  .thumbnail:hover img {
    opacity: 1;
  }
</style>
</head>
<body>

<div class="thumbnail">
  <img src="path_to_image.jpg" alt="Sample Image">
</div>

<script>
// 如果需要使用JavaScript来控制显示/隐藏，可以这样做：
document.querySelectorAll('.thumbnail').forEach(function(thumbnail) {
  thumbnail.addEventListener('mouseover', function() {
    this.querySelector('img').style.opacity = '1';
  });
  thumbnail.addEventListener('mouseout', function() {
    this.querySelector('img').style.opacity = '0';
  });
});
</script>

</body>
</html>