JavaScript 图片弹窗

HTML:

<!-- 触发弹窗 - 图片改为你的图片地址 --> <img loading="lazy" id="myImg" src="img.jpg" alt="文本描述信息" width="300" height="200"> <!-- 弹窗 --> <div id="myModal" class="modal"> <!-- 关闭按钮 --> <span class="close" onclick="document.getElementById('myModal').style.display='none'">&times;</span> <!-- 弹窗内容 --> <img class="modal-content" id="img01"> <!-- 文本描述 --> <div id="caption"></div> </div> 

CSS:

/* 触发弹窗图片的样式 */ #myImg { border-radius: 5px; cursor: pointer; transition: 0.3s; } #myImg:hover {opacity: 0.7;} /* 弹窗背景 */ .modal { display: none; /* Hidden by default */ position: fixed; /* Stay in place */ z-index: 1; /* Sit on top */ padding-top: 100px; /* Location of the box */ left: 0; top: 0; width: 100%; /* Full width */ height: 100%; /* Full height */ overflow: auto; /* Enable scroll if needed */ background-color: rgb(0,0,0); /* Fallback color */ background-color: rgba(0,0,0,0.9); /* Black w/ opacity */ } /* 图片 */ .modal-content { margin: auto; display: block; width: 80%; max-width: 700px; } /* 文本内容 */ #caption { margin: auto; display: block; width: 80%; max-width: 700px; text-align: center; color: #ccc; padding: 10px 0; height: 150px; } /* 添加动画 */ .modal-content, #caption { -webkit-animation-name: zoom; -webkit-animation-duration: 0.6s; animation-name: zoom; animation-duration: 0.6s; } @-webkit-keyframes zoom { from {-webkit-transform:scale(0)} to {-webkit-transform:scale(1)} } @keyframes zoom { from {transform:scale(0)} to {transform:scale(1)} } /* 关闭按钮 */ .close { position: absolute; top: 15px; right: 35px; color: #f1f1f1; font-size: 40px; font-weight: bold; transition: 0.3s; } .close:hover, .close:focus { color: #bbb; text-decoration: none; cursor: pointer; } /* 小屏幕中图片宽度为 100% */ @media only screen and (max-width: 700px){ .modal-content { width: 100%; } }

 JS:

// 获取弹窗 var modal = document.getElementById('myModal'); // 获取图片插入到弹窗 - 使用 "alt" 属性作为文本部分的内容 var img = document.getElementById('myImg'); var modalImg = document.getElementById("img01"); var captionText = document.getElementById("caption"); img.onclick = function(){ modal.style.display = "block"; modalImg.src = this.src; captionText.innerHTML = this.alt; } // 获取 <span> 元素，设置关闭按钮 var span = document.getElementsByClassName("close")[0]; // 当点击 (x), 关闭弹窗 span.onclick = function() { modal.style.display = "none"; }

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