javascript：什么是 Event Loop？

再谈EventLoop
http://www.ruanyifeng.com/blog/2014/10/event-loop.html

什么是EventLoop?
http://www.ruanyifeng.com/blog/2013/10/event_loop.html

进程与线程的简单解释
http://www.ruanyifeng.com/blog/2013/04/processes_and_threads.html

Wiki Event Loop
https://en.wikipedia.org/wiki/Event_loop

Stack
https://en.wikipedia.org/wiki/Stack_(abstract_data_type)

Philip Roberts: Help, I’m stuck in an event-loop.
https://vimeo.com/96425312

JavaScript 异步、栈、事件循环、任务队列

Javascript 浏览器事件循环机制
https://segmentfault.com/a/1190000015559210

这一次，彻底弄懂 JavaScript 执行机制
https://juejin.im/post/59e85eebf265da430d571f89

https://segmentfault.com/a/1190000012925872

https://jakearchibald.com/2015/tasks-microtasks-queues-and-schedules/（讲的很不错）

从浏览器多进程到JS单线程，JS运行机制最全面的一次梳理
http://www.dailichun.com/2018/01/21/js_singlethread_eventloop.html

process.nextTick()与promise.then()