What is CSS?

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• 为什么 CSS 这么难学？ - 知乎
• CSS是DSL(domain specific language)

规范

• 层叠样式表2级修订版1（CSS 2.1）规范中文
• Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification

css 基本概念 Udacity

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• 从Chrome源码看浏览器如何构建DOM树 – 人人网FED博客

• 从Chrome源码看浏览器如何计算CSS – 人人网FED博客

• For Developers - The Chromium Projects

• Checking out and building Chromium on Linux

• Linux Eclipse Dev

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• css - Difference between HTML "overflow : auto" and "overflow : scroll" - Stack Overflow

Auto will only show a scrollbar when any content is clipped. Scroll will however always show the scrollbar even if all content fits and you cant scroll it.