雅虎前端优化策略

大家好，又见面了，我是你们的朋友全栈君。

Content ·「网页内容相关
- Make Fewer HTTP Requests [减少http请求次数]
- Reduce DNS Lookups [减少DNS查询次数]
- Avoid Redirects [避免页面跳转]
- Make Ajax Cacheable [缓存Ajax]
- Postload Components [延迟加载]
- Preload Components [提前加载]
- Reduce the Number of DOM Elements [减少Dom元素数量]
- Split Components Across Domains [根据域名划分内容]
- Minimize Number of iframes [减少iframes数量]
- Avoid 404s [避免404]
Server ·「服务器相关
- Use a Content Delivery Network (CDN) [使用CDN]
- Add Expires or Cache-Control Header ×[添加Cache-Control控制头]
- Gzip Components [压缩传输文件]
- Configure ETags [配置ETags]
- Flush Buffer Early [尽早flush输出]
- Use GET for Ajax Requests [使用get请求]
- Avoid Empty Image src　　　　　　　　　　　　 [避免空的图片src]
Cookie ·「缓存
- Reduce Cookie Size [减少Cookie大小]
- Use Cookie-Free Domains for Components [页面内容使用无cookie域名]
CSS ·「CSS
- Put Stylesheets at Top [样式置顶]
- Avoid CSS Expressions [避免CSS表达式]
- Choose Over @import [选择link而不是import]
- Avoid Filters [避免使用Filters]
JavaScript ·「JavaScript
- Put Scripts at Bottom [脚本置底]
- Make JavaScript and CSS External [使用外部的JavaScript和CSS3]
- Minify JavaScript and CSS [简化的Js和css]
- Remove Duplicate Scripts [脚本去重]
- Minimize DOM Access [减少Dom访问]
- Develop Smart Event Handlers [使用智能事件处理]
Images ·「图片
- Optimize Images [优化图片]
- Optimize CSS Sprites [优化雪碧图]
- Do Not Scale Images in HTML [不要在html中缩放图片]
- Make favicon.ico Small and Cacheable [使用小且可缓存的favicon.ico]
Mobile ·「移动客户端
- Keep Components Under 25 KB [保持单个内容小于25KB]
- Pack Components Into a Multipart Document [打包组建成复合文档]