JavaScript event loop

https://www.zhihu.com/question/26038323
https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/EventLoop
https://blog.csdn.net/lin_credible/article/details/40143961
http://www.ruanyifeng.com/blog/2014/10/event-loop.html
https://www.zhihu.com/question/26038323

看了很多相关的博客，对 JavaScript 的单线程和事件循环有了初步的了解，进一步深入了解之前，还是先去补一下操作系统的功念吧。