JavaScript Deep Dive

What's actually happening under JavaScript's surface

Evan Moon

3 chapters

Covers how JavaScript works under the hood — array internals, the event loop, V8 optimizations, let and const scoping, and the difference between synchronous and asynchronous execution.

01
JavaScript's let, const, and the TDZ
Digging into the V8 engine to understand how JavaScript variables really work
02
How Does the V8 Engine Execute My Code?
From bytecode to optimized compilation: a look inside V8's execution pipeline
03
What Does Synchronous Really Mean?
Clarifying the often-confused concepts of sync, async, blocking, and non-blocking