CSS Preprocessor (framework): Sass, less and Stylus

Now the most common three CSS preprocessor frameworks are Sass, less CSS, and Stylus.

For less, you can use the less file directly on the page, but you can refer to Less.js for parsing, and the less output as a CSS file. It is recommended to use the latter.

The most commonly used less compiled output CSS tool: NPM associated with node. js, installing the less module and then using less test.less>test.css for output.

Reference:

Http://www.cnblogs.com/shaomenghao/p/3984737.html

Http://www.jb51.net/css/258397.html

http://less.bootcss.com/

Http://www.oschina.net/question/12_44255?sort=default&p=4

CSS Preprocessor (framework): Sass, less and Stylus