JavaScript 图片弹窗
本文我们为大家介绍如何使用 JavaScript 与 CSS 来创建图片弹窗。
图片素材：
HTML 代码：
<!-- 触发弹窗 - 图片改为你的图片地址 -->
<img 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'">×</span>
<!-- 弹窗内容 -->
<img class="modal-content" id="img01">
<!-- 文本描述 -->
<div id="caption"></div>
</div>
CSS 代码：
/* 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%;
}
}
JavaScript 代码：
// 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";
}