Js Understanding The Weird Parts -

const fn = outer(); fn(); // 42 (closure!)

All other values are truthy.

It’s not magic; it’s the engine setting up memory space for variables and functions during the creation phase. js understanding the weird parts

This is where the "weird part" comes in. In many programming languages, this would be a disaster. Chef V8 would stand there, staring at Console, holding his spatula, completely frozen. If a fire started in the kitchen, he wouldn't move. If the phone rang, he wouldn't answer. The entire restaurant would be blocked (blocked the thread). The UI would freeze. const fn = outer(); fn(); // 42 (closure