How to create class and constructor in JavaScript

As we know JavaScript is not fully Object Oriented Programming Language. But it is partially Object Oriented. We can create classes, constructors, objects, class instances etc things. We are here to see how to create class and constructors in JavaScript.

Class in JavaScript:

We create class in JavaScript using Function keyword. Functions are one of the fundamental building blocks in JavaScript. A function is a set of procedures- a set of codes that perform an operation and calculates a value.

function User(firstname, lastname, email){
}

Constructor in JavaScript:

Whenever we create an instance of the class, the constructor calls automatically.

function User(firstname, lastname, email){
  /***********************************
   This is the constructor.
  ***********************************/
  this.firstname = firstname;
  this.lastname = lastname;
  this.email = email;
}

I have prepared a short code snippet displaying how to create a class and constructor in JavaScript as well as how to instantiate the class-

Learn more about features of JavaScript here.