如何操作 - 燈箱
學習如何使用 CSS 和 JavaScript 建立一個模態影像畫廊（燈箱）。
燈箱（模態影像畫廊）
點選其中一張圖片以開啟燈箱
建立燈箱
下面的示例結合了來自 Modals 和 Slideshows 的程式碼來建立燈箱。
步驟 1) 新增 HTML
示例
<!-- 用於開啟燈箱的圖片 -->
<div class="row">
<div class="column">
<img src="img1.jpg" onclick="openModal();currentSlide(1)" class="hover-shadow">
</div>
<div class="column">
<img src="img2.jpg" onclick="openModal();currentSlide(2)" class="hover-shadow">
</div>
<div class="column">
<img src="img3.jpg" onclick="openModal();currentSlide(3)" class="hover-shadow">
</div>
<div class="column">
<img src="img4.jpg" onclick="openModal();currentSlide(4)" class="hover-shadow">
</div>
</div>
<!-- 模態框/燈箱 -->
<div id="myModal" class="modal">
<span class="close cursor" onclick="closeModal()">×</span>
<div class="modal-content">
<div class="mySlides">
<div class="numbertext">1 / 4</div>
<img src="img1_wide.jpg" style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">2 / 4</div>
<img src="img2_wide.jpg" style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">3 / 4</div>
<img src="img3_wide.jpg" style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">4 / 4</div>
<img src="img4_wide.jpg" style="width:100%">
</div>
<!-- 下/上一頁控制元件 -->
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
<!-- 說明文字 -->
<div class="caption-container">
<p id="caption"></p>
</div>
<!-- 縮圖控制元件 -->
<div class="column">
<img class="demo" src="img1.jpg" onclick="currentSlide(1)" alt="Nature">
</div>
<div class="column">
<img class="demo" src="img2.jpg" onclick="currentSlide(2)" alt="Snow">
</div>
<div class="column">
<img class="demo" src="img3.jpg" onclick="currentSlide(3)" alt="Mountains">
</div>
<div class="column">
<img class="demo" src="img4.jpg" onclick="currentSlide(4)" alt="Lights">
</div>
</div>
</div>
步驟 2) 新增 CSS
示例
.row > .column {
padding: 0 8px;
}
.row:after {
content: "";
display: table;
clear: both;
}
/* 預設建立四個均等的浮動列 */
.column {
float: left;
width: 25%;
}
/* 模態框（背景） */
.modal {
display: none;
position: fixed;
z-index: 1;
padding-top: 100px;
left: 0;
top: 0;
width: 100%;
height: 100%;
overflow: auto;
background-color: black;
}
/* 模態框內容 */
.modal-content {
position: relative;
background-color: #fefefe;
margin: auto;
padding: 0;
width: 90%;
max-width: 1200px;
}
/* 關閉按鈕 */
.close {
color: white;
position: absolute;
top: 10px;
right: 25px;
font-size: 35px;
font-weight: bold;
}
.close:hover,
.close:focus {
color: #999;
text-decoration: none;
cursor: pointer;
}
/* 預設隱藏幻燈片 */
.mySlides {
display: none;
}
/* 下一個 & 上一個按鈕 */
.prev,
.next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -50px;
color: white;
font-weight: bold;
font-size: 20px;
transition: 0.6s ease;
border-radius: 0 3px 3px 0;
user-select: none;
-webkit-user-select: none;
}
/* 將“下一個按鈕”定位到右側 */
.next {
right: 0;
border-radius: 3px 0 0 3px;
}
/* 懸停時，新增帶有一點半透明效果的黑色背景色 */
.prev:hover,
.next:hover {
background-color: rgba(0, 0, 0, 0.8);
}
/* 數字文字 (1/3 等) */
.numbertext {
color: #f2f2f2;
font-size: 12px;
padding: 8px 12px;
position: absolute;
top: 0;
}
/* 說明文字 */
.caption-container {
text-align: center;
background-color: black;
padding: 2px 16px;
color: white;
}
img.demo {
opacity: 0.6;
}
.active,
.demo:hover {
opacity: 1;
}
img.hover-shadow {
transition: 0.3s;
}
.hover-shadow:hover {
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}
步驟 3) 新增 JavaScript
示例
<script>
// 開啟模態框
function openModal() {
document.getElementById("myModal").style.display = "block";
}
// 關閉模態框
function closeModal() {
document.getElementById("myModal").style.display = "none";
}
var slideIndex = 1;
showSlides(slideIndex);
// 上/下一頁控制元件
function plusSlides(n) {
showSlides(slideIndex += n);
}
// 縮圖控制元件
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("demo");
var captionText = document.getElementById("caption");
if (n > slides.length) {slideIndex = 1}
if (n < 1) {slideIndex = slides.length}
for (i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
}
for (i = 0; i < dots.length; i++) {
dots[i].className = dots[i].className.replace(" active", "");
}
slides[slideIndex-1].style.display = "block";
dots[slideIndex-1].className += " active";
captionText.innerHTML = dots[slideIndex-1].alt;
}
</script>
自己動手試一試 »
提示: 也可以檢視 Modals 和 Slideshows。
