What is class ?

In JavaScript, a class is a blueprint for creating objects with shared structure and behavior. Classes make it easier to create multiple similar objects and organize code using object-oriented programming (OOP) principles.

How do we create class ?

There are two ways to create class. One by declaration and another by expression.

// class className {} - by declaration
// const className = class {} - by expression

// Declaration
class Person {
    name = "Ram";
    age = 25;
    location = "Kathmandu";
    greet () {
       return "Good Morning";
    }
}

// Expression; the class is anonymous but assigned to a variable
const Person = class {
    name = "Ram";
    age = 25;
    location = "Kathmandu";
    greet () {
        return "Good Morning";
    }
}

🧠 Real-Life Analogy

Think of a class like a blueprint for a house.

Using new, you build actual houses (objects) from that blueprint.

How to Create Object from Class

const objectName = new ClassName(arguments);

const Person = class {
    name = "Ram";
    age = 25;
    location = "Kathmandu";
    greet () {
        return "Good Morning";
    }
}

const person1 = new Person();
console.log(person1.name);
console.log(person1.age);
console.log(person1.location);
console.log(person1.greet());

What is Constructor ?

A constructor is a special method inside a class that automatically runs when you create an object using new.

It is mainly used to initialize (set) properties of the object.