What I learn today.

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This

This keyword holds the reference of an object that defines the current line of execution.

New

The new keyword is used to create an instance of an object, Its create a new empty object.

Scope

Mainly there are two types of scopes in javascript, 1. Local Scope 2.Global Scope
In javascript, every function creates a new scope. A scope defines the accessibility of variables. The variable that defines the inside of a function is known as the Local variable of that function. A local variable has a functional scope that means the variable can be accessible only inside of a function.
A variable that declares outside of a function that is a global variable. A global variable can access from anywhere in the program.

== vs ===

== is compare two values where === compare two values as well as datatype.

Closure

The closure is the combination of a function that bundled together with references of its surrounding state. In other words, closure gives access of the outer function scope from the inner function.

Recursion

It is a technique where a function call over and over from that function itself until it reached the result.

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