Let’s talk about memory management in JavaScript.

Regardless of the programming language, the memory life cycle can be understood in 3 steps:

• Allocate the memory you need
• Use (read, write) the allocated memory &
• Release the allocated memory when it is not needed anymore

Allocating memory

JavaScript automatically allocates memory when values are declared initially.

Example:

// allocates memory for a number
let num = 2604;

// allocates memory for a string
 let str = “hemanta”

Using memory

We use memory when we read and write in allocated memory. This can be done, for example, by reading and writing the value of a variable or an object property or even passing an argument to a function.

Releasing memory

At this stage, JavaScript utilizes a form of automatic memory management known as garbage collection. The purpose of a garbage collector is to monitor memory allocation and determine when a block of allocated memory is no longer needed and reclaim it.