Modernizr can not support HTML5 browser identification tag <aside> <section> tag, etc. In addition, its main function is Browser "function test." Below is their official website:
http://modernizr.com/
Below are some of the Modernizr script based on a variety of older browsers used to enhance support for HTML5.
https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-browser-Polyfills
Reproduced in: https: //my.oschina.net/cjkall/blog/195911