classWithConstructor.js

class Animal{
	constructor(name , height){
		this.name = name;
		this.height = height;
	}

	Hello(){
		console.log("Hello from Animal");
	}
}

//Extends class Parents/Animal
class Lion extends Animal{
	constructor(name , height , color){
		super(name , height);//call to super class
		this.color = color;//add new parameter
	}

	Hello(){
		super.Hello();
		console.log("Hello fron Lion");
	}
}

//Here Creating Instances Parent Class/Animal
//when create class instance by default call to constructor.	
let king_1 = new Animal(); 
let king_2 = new Animal('Tiger' , 3.2);
 
//Creating instance of child class/Lion
let son = new Lion('Dog' , 3.2 ,'red');
	son.Hello(); //Hello from Lion