How to Inherit the Classes in JavaScript?

Inheritance in JavaScript describes the notion that one object’s methods/properties are available to be used via another object. … But with the delegation, those changes are then available, which has a term in the inheritance world: retroactive inheritance.

Algorithm of Classes Inheritance in JavaScript

Open Notepad/notepad++/Dreamweaver
Create new
First include <html> tag ,<body> tag
Declare a class with the name of Animal with class keyword
Create constructor with constructor keyword and pass parameters of name

Assign values in name and speed variables through constructor
Create a method for speed with the name of Run and pass speed as a perimeter
Increase the value of speed initially by 1.
Print the value of speed with an animal name
Create new class rabbit with keyword Class

Inherit this class with parent class Animal by using the keyword extends
Create a new method with the name of hiding for giving value in the name.
Create an object of rabbit class with the name of Rabbit
At the time of the creation of an object called the parameterized constructor to give value in the name “white”.
Call the method of Run and Hide with this object.

Pseudocode of Classes Inheritance in JavaScript

<Html>

<Body>

Create Class    Animal

Create parameterized constructor pass parameter (name)

Give value speed = 0;

this.name = name

run (speed) //create method

this. speed += speed;// increase value of speed with 1

print this.name}   runs with speed this.speed

create a new method speed()

this.speed = 0;

print this.name   stopped

class Rabbit extends Animal

hide() {

PRINT this.name hides

Create OBJECT rabbit = new Rabbit White Rabbit

rabbit.run   5.

Rabbit. Hide(); // White Rabbit hides!

Program of Classes Inheritance in JavaScript

this.speed = 0;
    this.name = name;
  }

  run(speed) {
    this.speed += speed;
    alert(`${this.name} runs with speed ${this.speed}.`);
  }

  stop() {
    this.speed = 0;
    alert(`${this.name} stopped.`);
  }

}

// Inherit from Animal
class Rabbit extends Animal {
  hide() {
    alert(`${this.name} hides!`);
  }
}

let rabbit = new Rabbit("White Rabbit");

rabbit.run(5); 
// White Rabbit runs with speed 5.
rabbit.hide(); // White Rabbit hides!
</script>
</body>
</html>

Output

Topic Covered

Inheritance of the Classes in JavaScript.