How does JavaScript work?

What is Javascript: a single-threaded non-blocking asynchronous concurrent language?

Transcript

1. How does JavaScript work? Ulugbek Miniyarov Software Architect @ENUYGUN Heavily inspired by Philip Roberts’ JSConf EU 2014 Talk
2. V8 Engine (Chrome’s JS Runtime) ChakraCore (Egde’s JS Runtime) Nitro (Safari’s JS Runtime) SpiderMonkey (Firefox’s JS Runtime) JavaScript Engines:
3. JavaScript? A single-threaded non-blocking asynchronous concurrent language
4. JavaScript has a Call Stack, an Event Loop, a Callback Queue, and some other apis (Ajax, Timing ...) Are they inside JavaScript Engines? - Only Call Stack with Heap
6. Asynchronous feature is not included in JavaScript Engine. Browsers / NodeJS handles asynchronous part: - XHR Request - Timing (setTimeout, setInterval) - Events (onClick, onFocus i.e.)
8. The Call Stack one thread == one call stack == one thing at a time
29. Blocking And how non-blocking i/o gives asynchronicity
38. Demo: Blocking Script in Browser at: https://jsfiddle.net/9c9ztkvz/
39. Solution? Asynchronous Callback
47. Concurrency & Event Loop One thing at a time, except not really.
61. Ready for a Quiz?
64. Demo Time!
65. Thanks