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An in-depth guide to features of the LESS language. See the Overview for a quick summary of Less. For an in-depth guide to installing and setting up a Less environment, as well as documentation on developing for Less, see: Using Less.js. Less 及其英文文档由 Less 核心开发小组维护。 Documentation source code released under the MIT License, documentation under CC BY 3.0. Less 扩充了 CSS 语言，增加了诸如变量、混合（mixin）、运算、函数等功能。 Less 既可以运行在服务器端（Node.js 和 Rhino 平台）也可以运行在客户端（浏览器）。 Using Less.js in the browser is the easiest way to get started and convenient for developing with Less, but in production, when performance and reliability is important, we recommend pre-compiling using Node.js or one of the many third party tools available. To start off, link your.less stylesheets with the rel attribute set to stylesheet. 这里呈现的是 Less 的官方文档（中文版），包含了 Less 语言以及利用 JavaScript 开发的用于将 Less 样式转换成 CSS 样式的 Less.js 工具。因为 Less 和 CSS 非常像，因此很容易学习。而且 Less 仅对 CSS 语言增加了少许方便的扩展，这就是 Less 如此易学的原因之一。.

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