Domain

Functions, Scope & Object Model

Closures, this-binding, callables, object composition, classes, private fields, descriptors, references, and collection semantics.

1. Lexical Scope & Closures
2. Functions as Values
3. `this` Binding
4. Object Composition
5. Classes, Private Fields & Methods
6. Arrays, Collections & Immutability
7. Map, Set, WeakMap & WeakSet
8. Memory, References & Garbage Collection