JavaScript OOPS – Object Oriented Programming System

 

📘 What is OOPS?

• OOPS stands for Object Oriented Programming System.
• In simple words, OOPS is a way of writing code where we group data and functions together using objects.

👉 OOPS helps us write clean, organized, and reusable code.

 

🔹 Why Use OOPS in JavaScript?

✅ Code becomes easy to manage

✅ Reusability of code

✅ Better structure

✅ Used in real-world projects

✅ Makes applications scalable

 

🔹 What is an Object?

• An object is a real-world entity.

Example:

• Car
• Student
• User

Example Object in JavaScript

let user = {
name: “Shivam”,
age: 21
};

🔹 What is a Class?

• A class is a blueprint of an object.
• In simple words, a class defines how an object will look and behave.

 

Example Class in JavaScript

class User {
constructor(name, age) {
this.name = name;
this.age = age;
}
}

 

🔹 What is Constructor?

• A constructor is a special function that runs automatically when an object is created.

 

Constructor Example

class User {
constructor(name) {
this.name = name;
}
}

let u1 = new User(“Shivam”);

 

🔹 What is Inheritance?

• Inheritance means one class uses properties of another class.

👉 Child class inherits from parent class.

 

Inheritance Example

class Person {
greet() {
console.log(“Hello”);
}
}

class Student extends Person {}

let s1 = new Student();
s1.greet();

 

🔹 What is Encapsulation?

• Encapsulation means hiding data and showing only required information.
• It helps protect data.
• (Simple explanation is enough for beginners)

 

🔹 What is Polymorphism?

• Polymorphism means same function name, different behavior.
• It improves flexibility in code.

🔹 Advantages of JavaScript OOPS

• Cleaner code
• Easy debugging
• Reusable components
• Better project structure

 

📌 Conclusion

• JavaScript OOPS helps us write professional-level code.
• Using:
• Class
• Object
• Constructor
• Inheritance