This talk provides:

1. A crisp understanding of the JavaScript VM and how a single threaded engine can be massively parallel.
2. How event loop and callbacks works, example of blocking and nonblocking codes, ES6 generators for custom Async signaling.
3. How function definitions happen and invocations happen, how scope chains are formed, what closures are and how to reason about them.
4. Async programming, how reactive programming works at the bottom level, how event listeners registers themselves and then deregisters.

Summary and discussion: https://hasgeek.com/jsfoo/2015/schedu...