HTML如何实现图片放大？点击查看大图怎么实现？

<div class="image-gallery">
    <img src="thumbnail-1.jpg" data-large-src="large-image-1.jpg" alt="风景图1" class="zoomable-image">
    <img src="thumbnail-2.jpg" data-large-src="large-image-2.jpg" alt="风景图2" class="zoomable-image">
    <!-- 更多图片 -->
</div>

<!-- 模态框结构 -->
<div id="imageModal" class="modal">
    <span class="close-button">&times;</span>
    <img class="modal-content" id="img01" src="">
    <div id="caption"></div>
</div>

/* 缩略图样式 */
.zoomable-image {
    width: 200px; /* 示例缩略图大小 */
    height: auto;
    cursor: pointer;
    margin: 10px;
    border: 1px solid #ddd;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.2);
    transition: transform 0.2s ease-in-out;
}

.zoomable-image:hover {
    transform: scale(1.03); /* 鼠标悬停时轻微放大效果 */
}

/* 模态框（背景） */
.modal {
    display: none; /* 默认隐藏 */
    position: fixed; /* 固定定位，覆盖整个页面 */
    z-index: 1000; /* 确保在最上层 */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto; /* 如果图片太大，允许滚动 */
    background-color: rgba(0,0,0,0.9); /* 半透明黑色背景 */
    align-items: center; /* 垂直居中 */
    justify-content: center; /* 水平居中 */
    animation: fadeIn 0.3s;
}

/* 模态框内的图片 */
.modal-content {
    margin: auto;
    display: block;
    max-width: 90%; /* 图片最大宽度 */
    max-height: 90%; /* 图片最大高度 */
    object-fit: contain; /* 确保图片完整显示 */
    animation: zoomIn 0.3s;
}

/* 关闭按钮 */
.close-button {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

.close-button:hover,
.close-button:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

/* 图片描述/标题 */
#caption {
    margin: 15px auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
}

/* 动画效果 */
@keyframes fadeIn {
    from {opacity: 0}
    to {opacity: 1}
}

@keyframes zoomIn {
    from {transform: scale(0.8);}
    to {transform: scale(1);}
}

document.addEventListener('DOMContentLoaded', function() {
    // 获取模态框元素
    const modal = document.getElementById('imageModal');
    const modalImg = document.getElementById('img01');
    const captionText = document.getElementById('caption');
    const closeButton = document.querySelector('.close-button');

    // 获取所有可点击放大的图片
    const images = document.querySelectorAll('.zoomable-image');

    images.forEach(img => {
        img.addEventListener('click', function() {
            modal.style.display = 'flex'; // 使用flexbox居中内容
            modalImg.src = this.dataset.largeSrc || this.src; // 使用data-large-src，如果没有则用src
            captionText.innerHTML = this.alt; // 显示图片的alt文本作为描述
        });
    });

    // 关闭模态框
    closeButton.addEventListener('click', function() {
        modal.style.display = 'none';
    });

    // 点击模态框背景关闭（不包括图片本身）
    modal.addEventListener('click', function(event) {
        if (event.target === modal) {
            modal.style.display = 'none';
        }
    });

    // 键盘ESC键关闭
    document.addEventListener('keydown', function(event) {
        if (event.key === 'Escape' && modal.style.display === 'flex') {
            modal.style.display = 'none';
        }
    });
});

AwesomeLightbox

<!-- HTML -->
<a href="large-image-1.jpg" data-caption="美丽的日落" class="lightbox-item">
    <img src="thumbnail-1.jpg" alt="日落">
</a>
<a href="large-image-2.jpg" data-caption="城市夜景" class="lightbox-item">
    <img src="thumbnail-2.jpg" alt="夜景">
</a>

<!-- JS (在引入库文件之后) -->
<script>
    document.addEventListener('DOMContentLoaded', function() {
        // 假设 AwesomeLightbox 库提供了一个初始化方法
        AwesomeLightbox.init('.lightbox-item');
    });
</script>