JavaScript Code

Class

Class is a blueprint which can be used to create objects of this class type.

The following is a simple example to create a class Student.

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

• class is a keyword.
• Student is class name.
• constructor() is method in which we set properties for the class object.
• (name, age) are parameters of the constructor. there can be as many number of constructors as required.
• this.name = name; set the name property of this Student type object with the value received for name parameter in constructor() .

Object

To create an object of any class type, use new keyword.

The following is an example to create a new object of class Student.

student1 = new Student('Ram', 12);

Example

Create a class named Student, and create 3 objects of class type Student.

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

let student1 = new Student('Ram', 12);
let student2 = new Student('Bob', 9);
let student3 = new Student('Karan', 15);

console.log(student1.name + ', ' + student1.age);
console.log(student2.name + ', ' + student2.age);
console.log(student3.name + ', ' + student3.age);

Class Methods

There can be custom methods inside the class, where the objects can call.

The following is an example where Student class contains a method printDetails() to print the student details.

class Student {
    constructor(name, age) {
        this.name = name;
        this.age = age;
    }
    printDetails() {
        console.log('Name : ' + this.name);
        console.log('Age  : ' + this.age);
        console.log('\n');
    }
}

let student1 = new Student('Ram', 12);
let student2 = new Student('Bob', 9);
let student3 = new Student('Karan', 15);

student1.printDetails();
student2.printDetails();
student3.printDetails();