之前发了两篇关于CSS的文章，大家都比较关注，看来大家对这块东西都是很感兴趣的，现在趁热打铁再来一发~~
简介
一个用纯CSS实现的简单幻灯片效果，仅供实验，要看Demo请自备Chrome浏览器，勿用于生产环境，不然后果自付，咩哈哈哈哈哈~~
Demo地址：http://output.jsbin.com/tewuso
效果图
效果图录出来很烂，不上传了，请看Demo :（
技术点
- :target伪类
- object-fit属性
原理说明
:target伪类可以指定当前锚点目标元素的样式，比如下面：
<a href="#image-1">查看图片</a><img src="/static/imghwm/default1.png" data-src="xxx.jpg" class="lazy" id="image-1" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" >
#image-1{ display: none;}#image-1:target{ display: block;} 点一下"显示图片"，原本隐藏起来的#image-1就会突然冒出来，是不是很神奇？（噗→_→）
CSS中的object-fit属性在本Demo里面只是辅助作用，其作用是指定object类元素（img、video等）中的实际内容在元素中的填充方式，跟background-size: contain/cover有点点类似。
更具体的介绍请看张鑫旭的文章：半深入理解CSS3 object-position/object-fit属性
既然知道有:target这么个神奇的东西在，那我们完全可以用CSS实现“点一个小图显示一个大图”的效果，再把HTML写得溜~一点，实现上下图连续查看也是可以的。
代码
先上HTML部分，可以看到其实这种方式实现的幻灯片效果并不太灵活，每一个上下图按钮都要写出来，当然用程序生成此类代码也是很方便的~
<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>JS Bin</title></head><body> <div class="container"> <!--缩略图列表--> <ul class="gallery-wrapper"> <li> <a href="#image-1"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/alarm%20politie.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > </a> </li> <li> <a href="#image-2"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/flowers.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > </a> </li> <li> <a href="#image-3"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/her%20camera.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > </a> </li> <li> <a href="#image-4"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/little%20fox.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > </a> </li> <li> <a href="#image-5"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/map.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > </a> </li> <li> <a href="#image-6"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/ship.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > </a> </li> <li> <a href="#image-7"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/snow%20mountain.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > </a> </li> <li> <a href="#image-8"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/ship%20and%20shepherd.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > </a> </li> </ul> <!--大图容器--> <div class="hidden-images-wrapper"> <div id="image-1"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/alarm%20politie.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > <a class="img-prev" href="#image-8">PREV</a> <a class="img-next" href="#image-2">NEXT</a> <a class="img-close" href="#"></a> </div> <div id="image-2"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/flowers.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > <a class="img-prev" href="#image-1">PREV</a> <a class="img-next" href="#image-3">NEXT</a> <a class="img-close" href="#"></a> </div> <div id="image-3"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/her%20camera.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > <a class="img-prev" href="#image-2">PREV</a> <a class="img-next" href="#image-4">NEXT</a> <a class="img-close" href="#"></a> </div> <div id="image-4"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/little%20fox.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > <a class="img-prev" href="#image-3">PREV</a> <a class="img-next" href="#image-5">NEXT</a> <a class="img-close" href="#"></a> </div> <div id="image-5"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/map.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > <a class="img-prev" href="#image-4">PREV</a> <a class="img-next" href="#image-6">NEXT</a> <a class="img-close" href="#"></a> </div> <div id="image-6"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/ship.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > <a class="img-prev" href="#image-5">PREV</a> <a class="img-next" href="#image-7">NEXT</a> <a class="img-close" href="#"></a> </div> <div id="image-7"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/snow%20mountain.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > <a class="img-prev" href="#image-6">PREV</a> <a class="img-next" href="#image-8">NEXT</a> <a class="img-close" href="#"></a> </div> <div id="image-8"> <img src="/static/imghwm/default1.png" data-src="http://7rf38t.com1.z0.glb.clouddn.com/ship%20and%20shepherd.jpg" class="lazy" alt="用纯CSS实现简单的相册幻灯片_html/css_WEB-ITnose" > <a class="img-prev" href="#image-7">PREV</a> <a class="img-next" href="#image-1">NEXT</a> <a class="img-close" href="#"></a> </div> </div> </div></body></html>
CSS代码，很大部分都是用于定位啊布局什么的，另外还有相当一部分用于过渡动画效果，貌似有点影响性能~
html,body{ height: 100%; margin: 0; padding: 0; overflow: hidden; background-color: #f0f0f0;}.gallery-wrapper{ display: block; list-style: none; width: 800px; height: 400px; margin: 60px auto 0 auto; padding: 10px; background-color: #fff;}.gallery-wrapper li{ display: block; float: left; list-style: none; width: 180px; height: 180px; padding: 10px;}.gallery-wrapper a{ display: block; width: 180px; height: 180px; overflow: hidden;}.gallery-wrapper img{ display: block; width: 180px; height: 180px; object-fit: cover; background-color: #eee; transition: .5s;}.gallery-wrapper a:hover img{ transform: scale(1.1);}.hidden-images-wrapper > div{ position: fixed; top: 0; right: 0; bottom: 0; left: 0; background-color: rgba(0,0,0,.8); opacity: 0; transition: .6s; pointer-events: none;}.hidden-images-wrapper > div:target{ opacity: 1; pointer-events: auto;}.hidden-images-wrapper img{ display: block; position: absolute; z-index: 3; top: 0; right: 0; bottom: 0; left: 0; width: 740px; height: 500px; max-width: 90%; max-height: 90%; margin: auto; padding: 30px; background-color: #fff; border-radius: 5px; object-fit: contain; transition: .7s; transform: translateY(-30px);}.hidden-images-wrapper div:target img{ transform: translateY(0);}.img-prev,.img-next{ display: block; position: absolute; z-index: 4; top: 0; bottom: 0; height: 50px; margin: auto 0; padding: 0 20px; color: #333; font-size: 16px; line-height: 50px; text-decoration: none; background-color: #fff;}.img-prev:hover,.img-next:hover{ background-color: #eee;}.img-prev{ left: 0; border-radius: 0 5px 5px 0;}.img-next{ right: 0; border-radius: 5px 0 0 5px;}.img-close{ position: absolute; z-index: 2; top: 0; right: 0; bottom: 0; left: 0; cursor: default;} 就这些。。。
最后丢一个单个图片放大展示的效果：http://output.jsbin.com/goyeju/2，有性趣的同学可以自行研究原理，也很简单的
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