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yaofly2012 avatar yaofly2012 commented on May 30, 2024

https://segmentfault.com/n/1330000016705727

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yaofly2012 avatar yaofly2012 commented on May 30, 2024

间接资源呢?比如JS脚本里动态插入脚本

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yaofly2012 avatar yaofly2012 commented on May 30, 2024

首页要记住一点:文档的状态是不可逆的,即触发触发了DOMContentLoaded或者load事件,则不会再触发该事件。
间接资源是否阻塞DOM渲染,那要看直接资源怎么加载的,已经间接资源怎么被插入的。
比如:页面通过一般的script标签(没有defer, async)加载1.js,那执行1.js时通过document.write("<script type="text/javascript" defer src='2.js'></script>"),2.js不影响DOM渲染,但是若document.write("<script type="text/javascript" src='2.js'></script>")则会影响。

看看总结:
https://segmentfault.com/n/1330000016705727

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