事件循环到底是个什么东西

Philip Roberts explains the JavaScript event loop, call stack, callbacks and asynchronous behavior with live visualizations using a tool he built. It demystifies terms like non-blocking and single-threaded.

Why HN likes it: HN commenters repeatedly name it as the best explanation of the JS event loop and the first thing to watch before tackling async code.

“The tool he created to display the event loop in real time is fantastic.”