When the javascript engine starts executing the code it will store variables inside of the memory. for storing data, runtime uses two different memory:
Stack memory
Heap memory
Javascript only can communicate with stack memory.
Before explaining the differences around these memories I should explain the data types in javascript. In javascript, we have two different data types:
Primitive types: primitive types stored directly in the stack
String, Number, Boolean, Null, Undefined, Symbol, BigInt
Reference types: Stored in the heap and accessed by reference from Stack
Arrays, Functions, Objects
For maximum optimization in the memory space javascript engine uses something called garbage collector. it will clean the value immediately when a value is not reachable via a variable(label).
