Javascript Memory Management

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).