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原来 CSS 与 JS 是这样阻塞 DOM 解析和渲染的 - 掘金
source link: https://juejin.im/post/59c60691518825396f4f71a1
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hello~各位亲爱的看官老爷们大家好。估计大家都听过，尽量将CSS放头部，JS放底部，这样可以提高页面的性能。然而，为什么呢？大家有考虑过么？很长一段时间，我都是知其然而不知其所以然，强行背下来应付考核当然可以，但实际应用中必然一塌糊涂。因此洗（wang）心
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