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css加载会造成阻塞吗？
source link: https://juejin.im/post/5b88ddca6fb9a019c7717096
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之前面试今日头条的时候，今日头条面试官问我，js执行会阻塞DOM树的解析和渲染，那么css加载会阻塞DOM树的解析和渲染吗？所以，接下来我就来对css加载对DOM树的解析和渲染做一个测试。 为了完成本次测试，先来科普一下，如何利用chrome来设置下载速度
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