https://github.com/fex-team/GMU/wiki/%E8%BD%AC%E5%B1%8F%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88$.matchMedia

https://hacks.mozilla.org/2012/06/using-window-matchmedia-to-do-media-queries-in-javascript/

http://suqing.iteye.com/blog/1982733

http://www.w3cplus.com/solution/css3content/css3content.html

https://developer.mozilla.org/zh-CN/docs/Web/CSS/content

http://www.princexml.com/forum/topic/180/prefix-a-content-attr-src-url-value

mediaquery