摘要:
1. 把css放在head区 Before a browser can begin to render a web page, it must download and parse any stylesheets that are required to lay out the page. Even if a stylesheet is in an external file that is cached, rendering is blocked until the browser loads the stylesheet from disk. 由于页面中所有css下载并解析完成之前, 浏览 阅读全文
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