Classes in JavaScript

Classes in JavaScript requires grasping their role in object-oriented programming (OOP). JavaScript classes offer a streamlined way to create objects and manage inheritance, enabling developers to write clearer, more maintainable code.

What is Class ?

A class in JavaScript is essentially a blueprint for creating objects with specific properties and methods. It provides a clear and organized way to define objects, making the code more readable and maintainable.

Class Declaration :

A class is declared using the class keyword followed by the class name. The class body is enclosed in curly braces {}.
class Person {
// Class body
}

Constructor Method :

The constructor method is a special method used for initializing new objects. It is called automatically when a new instance of the class is created. This method is where you define the initial state (properties) of the object.
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
}

Using a Class :

To create an instance(object) of a class, you can use the new keyword.
const Person = new Person('PBA',20);

Class Method :

In JavaScript, class methods are functions that are defined within a class and can be called on instances of that class.
class Person{
constructor()
{
  //code
}
method()
{
  //code
}
}

Examples :

Output : Enter the no : 5
Enter the no : 5
area=25
perimeter=20
diagonal=7.0710678118654755

Output : enter the no : 5
prime
enter the no : 4
not prime

Output : enter the no : 121
palindrome
enter the no : 120
not palindrome

Conclusion :

Classes in JavaScript provide a more intuitive and structured way to handle objects and inheritance compared to the traditional prototype-based approach. They simplify the creation and management of objects, support encapsulation, and promote code reuse through inheritance. Understanding and effectively utilizing classes can lead to more maintainable and scalable JavaScript applications.

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