css-sprite
为纪念美国现代舞舞蹈家玛莎·葛兰姆诞辰，Google Doodle推出了一款极其炫酷的LOGO，整个LOGO使用CSS Sprite技术，利用一个初始图片和一张画满各个动作的拼接图片，实现了动画，而非传统的GIF动画图像。
效果
原文查看效果
CSS Sprite简介
CSS Sprites(css精灵)，是一种网页图片应用处理方式。它允许你将一个页面涉及到的所有零星图片都包含到一张大图中去，这样一来，当访问该页面时，载入的图片就不会像以前那样一幅一幅地慢慢显示出来了。
限制：不高于200KB的单张图片
整合处理图片的目的是减少请求次数，如果每一张图片都向服务器发送请求，即影响服务器负载也影响页面性能。
CSS Sprite原理
CSS Sprites的原理就是把网页中用到的小图标、图片类集中整合到一张图片中。
再利用CSS中的背景属性
- background-image
- background-repeat
- background-position
当需要显示指定图片时，定位到图片相应位置即可
Google粘土动画
实现步骤：
1、准备素材，设计动画的每一帧图片并整合成一张图片
2、监听点击事件执行动画
3、根据延迟时间设置图片背景位置以显示下一帧图片
素材
HTML
JS
Google舞蹈者
实现步骤：
1、准备素材，收集舞蹈者每一个动作集成到一张图片
2、初始化每一个动作的位置
3、定时动态创建div元素设置背景位置和元素位置
素材
HTML
JS
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总结
希望大家可以通过本文的Google动画实现了解到一些CSS Sprite技术，CSS Sprite是前端优化的一部分，合理的利用好可以提高网页的性能，也可以丰富网页内容。