HTMLCSS网格画廊与lightbox实现教程

<div class="gallery">
  <img src="thumb1.jpg" data-full="full1.jpg" alt="图片1" class="gallery-item">
  <img src="thumb2.jpg" data-full="full2.jpg" alt="图片2" class="gallery-item">
  <img src="thumb3.jpg" data-full="full3.jpg" alt="图片3" class="gallery-item">
  <!-- 更多图片 -->
</div>
<p><!-- Lightbox 模态框 -->
<div class="lightbox" id="lightbox">
<span class="close">×</span>
<img class="lightbox-content" id="lightbox-img">
</div></p>

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  padding: 10px;
}
<p>.gallery-item {
width: 100%;
height: 150px;
object-fit: cover;
cursor: pointer;
border-radius: 8px;
transition: transform 0.2s;
}</p><p>.gallery-item:hover {
transform: scale(1.05);
}</p>

const galleryItems = document.querySelectorAll('.gallery-item');
const lightbox = document.getElementById('lightbox');
const lightboxImg = document.getElementById('lightbox-img');
const closeBtn = document.querySelector('.close');
<p>galleryItems.forEach(item => {
item.addEventListener('click', () => {
lightboxImg.src = item.dataset.full;
lightbox.style.display = 'flex';
});
});</p><p>closeBtn.addEventListener('click', () => {
lightbox.style.display = 'none';
});</p><p>lightbox.addEventListener('click', (e) => {
if (e.target === lightbox) {
lightbox.style.display = 'none';
}
});</p>

.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
<p>.lightbox-content {
max-width: 90vw;
max-height: 90vh;
border-radius: 4px;
box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}</p><p>.close {
position: absolute;
top: 20px;
right: 30px;
color: #fff;
font-size: 40px;
cursor: pointer;
}</p>