HTML5 is a markup language used for structuring and presenting content on the World Wide Web. HTML5 was the fifth and last major version of HTML that is a World Wide Web Consortium recommendation.

<script async src="//codepen.io/assets/embed/ei.js"></script> 在 JSConf.Asia 2013 ， Lea Verou 介紹了 [CSS in the 4th dimension](http://lea.verou.me/css-4d/# ...