JavaScript Lightbox（ JavaScript 图片弹窗）

JavaScript Lightbox（ JavaScript 图片弹窗）

本文我们为大家介绍如何使用 HTML、JavaScript 与 CSS 来创建 Lightbox，类似相册预览功能。

HTML 代码：<!-- 图片改为你的图片地址 --><h2 style="text-align:center">Lightbox</h2> <div class="row"> <div class="column"> <img src="static.runoob.com/images/demo/demo1.jpg" style="width:100%" onclick="openModal();currentSlide(1)" class="hover-shadow cursor"> </div> <div class="column"> <img src="static.runoob.com/images/demo/demo2.jpg" style="width:100%" onclick="openModal();currentSlide(2)" class="hover-shadow cursor"> </div> <div class="column"> <img src="static.runoob.com/images/demo/demo3.jpg" style="width:100%" onclick="openModal();currentSlide(3)" class="hover-shadow cursor"> </div> <div class="column"> <img src="static.runoob.com/images/demo/demo4.jpg" style="width:100%" onclick="openModal();currentSlide(4)" class="hover-shadow cursor"> </div></div> <div id="myModal" class="modal"> <span class="close cursor" onclick="closeModal()">&times;</span> <div class="modal-content"> <div class="mySlides"> <div class="numbertext">1 / 4</div> <img src="static.runoob.com/images/demo/demo1.jpg" style="width:100%"> </div> <div class="mySlides"> <div class="numbertext">2 / 4</div> <img src="static.runoob.com/images/demo/demo2.jpg" style="width:100%"> </div> <div class="mySlides"> <div class="numbertext">3 / 4</div> <img src="static.runoob.com/images/demo/demo3.jpg" style="width:100%"> </div> <div class="mySlides"> <div class="numbertext">4 / 4</div> <img src="static.runoob.com/images/demo/demo4.jpg" style="width:100%"> </div> <a class="prev" onclick="plusSlides(-1)">&#10094;</a> <a class="next" onclick="plusSlides(1)">&#10095;</a> <div class="caption-container"> <p id="caption"></p> </div> <div class="column"> <img class="demo cursor" src="static.runoob.com/images/demo/demo1.jpg" style="width:100%" onclick="currentSlide(1)" alt="Nature and sunrise"> </div> <div class="column"> <img class="demo cursor" src="static.runoob.com/images/demo/demo2.jpg" style="width:100%" onclick="currentSlide(2)" alt="Trolltunga, Norway"> </div> <div class="column"> <img class="demo cursor" src="static.runoob.com/images/demo/demo3.jpg" style="width:100%" onclick="currentSlide(3)" alt="Mountains and fjords"> </div> <div class="column"> <img class="demo cursor" src="static.runoob.com/images/demo/demo4.jpg" style="width:100%" onclick="currentSlide(4)" alt="Northern Lights"> </div> </div></div>CSS 代码：body { font-family: Verdana, sans-serif; margin: 0;} * { box-sizing: border-box;} .row > .column { padding: 0 8px;} .row:after { content: ""; display: table; clear: both;} .column { float: left; width: 25%;} /* 弹窗背景 */.modal { display: none; position: fixed; z-index: 1; padding-top: 100px; left: 0; top: 0; width: 100%; height: 100%; overflow: auto; background-color: black;} /* 弹窗内容 */.modal-content { position: relative; background-color: #fefefe; margin: auto; padding: 0; width: 90%; max-width: 1200px;} /* 关闭按钮 */.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;} .mySlides { display: none;} .cursor { cursor: pointer} /* 上一页 & 下一页 按钮 */.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;} /* 定位下一页按钮到右侧 */.next { right: 0; border-radius: 3px 0 0 3px;} /* 鼠标移动上去修改背景色为黑色 */.prev:hover,.next:hover { background-color: rgba(0, 0, 0, 0.8);} /* 页数(1/3 etc) */.numbertext { color: #f2f2f2; font-size: 12px; padding: 8px 12px; position: absolute; top: 0;} img { margin-bottom: -4px;} .caption-container { text-align: center; background-color: black; padding: 2px 16px; color: white;} .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)}JavaScript 代码：function openModal() { document.getElementById('myModal').style.display = "block";} function closeModal() { document.getElementById('myModal').style.display = "none";} var slideIndex = 1;showSlides(slideIndex); function plusSlides(n) { showSlides(slideIndex += n);} 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;}在线演示