Yahoo Web前端优化守则

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Yahoo Web前端优化守则

CONTENTMake fewer HTTP requests减少HTTP请求Reduce DNS lookups减少DNS查询Avoid URL redirects避免URL重定向Make AJAX cacheable缓存AJAX请求Reduce the number of DOM elements减少DOM元素的数量Avoid HTTP 404 (Not Found) error避免404错误COOKIEReduce cookie size减少cookie的大小Use cookie-free domains CSSPut CSS at top将CSS放在header头部Avoid CSS expressions避免CSS表达式Make JavaScript and CSS external使用外部CSS,JSMinify JavaScript and CSS精简JS,CSSRemove duplicate JavaScript and CSS删除重复的JS,CSSAvoid AlphaImageLoader filter IMAGESDo not scale images in HTML Make favicon small and cacheable JAVASCRIPTPut JavaScript at bottom将JS放在body的底部Make JavaScript and CSS external使用外部CSS,JSMinify JavaScript and CSS精简JS,CSSRemove duplicate JavaScript and CSS删除重复的JS,CSSSERVERUse a Content Delivery Network (CDN)使用内容分发网络Avoid empty src or href避免空的src和hrefAdd Expires headersHTTP请求添加Expires头部Compress components with gzipHTTP请求使用gzip,deflate,sdch压缩Configure entity tags (ETags)HTTP请求添加ETags头部Use GET for AJAX requestsAJAX请求多使用GET方式