Less.js 2.6.0 发布了，改进记录包括： Underscore now allowed in dimension unit Fixes for import by reference Fix for #2384 Changes HTTPRequest "sync" setting to simply hide the page until less has rendered, browser version is now orders of magnitude faster. Added ability to cache stylesheets while using modifyVars Error when when image-size functions are used in browser-less Fixed extend leaking through nested parent selector. #2586 Added "or" keyword and allowed arbitrary logical expression in guards Fixing #2124 - Parsing Error "Unrecognised input" for color operations Logical operator and now has higher precence then logical operator or. Allow unknown at-rules w/o {} block Less CSS 是一个使用广泛的 CSS 预处理器，通过简单的语法和变量对 CSS 进行扩展，可减少很多 CSS 的代码量。 LESS 将 CSS 赋予了动态语言的特性，如 变量， 继承， 运算， 函数. LESS 既可以在 客户端 上运行 (支持IE 6+, Webkit, Firefox)，也可一在服务端运行 (借助 Node.js). Less.js 2.6.0 发布，CSS 预处理器下载地址
