The CSS Handbook Conclusion 2 Preface The CSS Handbook follows the 80/20 rule: learn in 20% of the time the 80% of a topic. In particular, the goal is to get you up to speed quickly with CSS. This Enjoy! 3 The CSS Handbook 1. Preface 2. Introduction to CSS 2.1. How does CSS look like 2.2. Semicolons 2.3. Formatting and indentation 3. A brief history of CSS 4. Adding CSS to an HTML page with a CSS Variable value using JavaScript 19.5. Handling invalid values 19.6. Browser support 19.7. CSS Variables are case sensitive 19.8. Math in CSS Variables 5 19.9. Media queries with CSS Variables

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学习域名系统（又叫 DNS） 学习 HTTP/Networks（包括 CORS 和 WebSockets） 学习网页寄存（通称虚拟主机） 学习前端开发 学习用户界面／交互设计 学习 HTML 和 CSS 学习搜索引擎优化 学习 JavaScript 学习 Web 动画 学习 DOM、BOM 和 jQuery 学习网页字体 & 图标 2 1.6.1.14 1.6.1.15 1.6.1 1.7.31 1.7.32 1.7.33 1.7.34 1.7.35 1.7.36 1.7.37 HTTP / 网络工具 代码编辑工具 浏览器上的神兵利器 HTML 工具 CSS 工具 DOM 工具 JavaScript 工具 静态网页构建工具 无障碍访问工具 应用程序框架工具（台式机、手机、平板电脑等） 渐进式 Web 应用工具 脚手架工具 常规前端开发工具 笔者有意将本书打造为一份专业资料，为想要或正在实践的前端开发者们提供学习材料和开 发工具。其次，它同样可供主管、CTO、讲师和猎头们深入探索前端开发实践。 本书内容偏向于 WEB 技术（HTML、CSS、DOM、JavaScript）和以这些技术为根基直接构 建而成的开源技术。书中引用和讨论的材料要么就是同类翘楚，要么就是解决问题的流行方 案。 本书不是一本囊括所有前端可用资源的综合纲领。其价值在于为恰好够用的分类信息搜罗简

Loading All The Plugins from Package.JSON 11 Note 11 NOTE 12 Installing Plugins for Responsive images|Css Minification|Js minification 12 Image processing plugins 12 Asset optimizer plugins 13 Anatomy of Tasks 19 Chapter 4: Concatenating files 21 Examples 21 Concat all css files into one using gulp-concat 21 Concat and Uglify JS and CSS files 21 Chapter 5: Create a watcher 23 Examples 23 Watcher task Examples 28 Installation and usage 28 Chapter 10: Minifying CSS 30 Examples 30 Using gulp-clean-css and gulp-rename 30 Sass and Css - Preprocessing with Gulp 30 Chapter 11: Minifying HTML 32 Examples

com/nimojs/gulp-book gulp 是基于 node 实现 Web 前端自动化开发的工具，利用它能够极大的提高开发效率。 在 Web 前端开发工作中有很多“重复工作”，比如压缩CSS/JS文件。而这些工作都是有规律的。找到这 些规律，并编写 gulp 配置代码,让 gulp 自动执行这些“重复工作”。 将规律转换为 gulp 代码 现有目录结构如下： └── js/ 你还可以监控 js/ 目录下的 js 文件，当某个文件被修改时，自动压缩修改文件。启动 gulp 后就可以让它 帮助你自动构建 Web 项目。 gulp 还可以做很多事，例如： 1. 压缩CSS 2. 压缩图片 3. 编译Sass/LESS 4. 编译CoffeeScript 5. markdown 转换为 html gulp 入门指南 - 2 - 本文档使用 看云 构建 安装 使用 gulp 压缩 CSS 压缩 css 代码可降低 css 文件大小，提高页面打开速度。 我们接着将规律转换为 gulp 代码 规律 找到 css/ 目录下的所有 css 文件，压缩它们，将压缩后的文件存放在 dist/css/ 目录下。 gulp 代码 你可以 下载所有示例代码 或 在线查看代码 当熟悉 使用 gulp 压缩 JS 的方法后，配置压缩 CSS 的 gulp 代码就变得很轻松。

toscrape.com/tag/humor/', ] def parse(self, response): for quote in response.css('div.quote'): yield { 'text': quote.css('span.text::text').get(), 'author': quote.xpath('span/small/text()').get(), } page) 5 Scrapy Documentation, Release 1.6.0 (continued from previous page) next_page = response.css('li.next a::attr("href")').get() if next_page is not None: yield response.follow(next_page, self.parse) response object as an argument. In the parse callback, we loop through the quote elements using a CSS Selector, yield a Python dict with the extracted quote text and author, look for a link to the next

response): for quote in response.css('div.quote'): yield { 'author': quote.xpath('span/small/text()').get(), 'text': quote.css('span.text::text').get(), } next_page = response.css('li.next a::attr("href")') response object as an argument. In the parse callback, we loop through the quote elements using a CSS Selector, yield a Python dict with the extracted quote text and author, look for a link to the next sources using extended CSS selectors and XPath expressions, with helper methods to extract using regular expressions. • An interactive shell console (IPython aware) for trying out the CSS and XPath expressions

response): for quote in response.css('div.quote'): yield { 'author': quote.xpath('span/small/text()').get(), 'text': quote.css('span.text::text').get(), } next_page = response.css('li.next a::attr("href")') response object as an argument. In the parse callback, we loop through the quote elements using a CSS Selector, yield a Python dict with the extracted quote text and author, look for a link to the next sources using extended CSS selectors and XPath expressions, with helper methods to extract using regular expressions. • An interactive shell console (IPython aware) for trying out the CSS and XPath expressions

response): for quote in response.css('div.quote'): yield { 'author': quote.xpath('span/small/text()').get(), 'text': quote.css('span.text::text').get(), } next_page = response.css('li.next a::attr("href")') response object as an argument. In the parse callback, we loop through the quote elements using a CSS Selector, yield a Python dict with the extracted quote text and author, look for a link to the next sources using extended CSS selectors and XPath expressions, with helper methods to extract using regular expressions. • An interactive shell console (IPython aware) for trying out the CSS and XPath expressions

toscrape.com/tag/humor/', ] def parse(self, response): for quote in response.css('div.quote'): yield { 'text': quote.css('span.text::text').get(), 'author': quote.xpath('span/small/text()').get(), } page) 5 Scrapy Documentation, Release 1.7.4 (continued from previous page) next_page = response.css('li.next a::attr("href")').get() if next_page is not None: yield response.follow(next_page, self.parse) response object as an argument. In the parse callback, we loop through the quote elements using a CSS Selector, yield a Python dict with the extracted quote text and author, look for a link to the next