JAVASCRIPT

super class js

By calling the super() method in the constructor method, we call the parent's constructor method and gets access to the parent's properties and methods:

class Car {
  constructor(brand) {
    this.carname = brand;
  }
  present() {
    return 'I have a ' + this.carname;
  }
}

class Model extends Car {
  constructor(brand, mod) {
    super(brand);
    this.model = mod;
  }
  show() {
    return this.present() + ', it is a ' + this.model;
  }
}

mycar = new Model("Ford", "Mustang");
document.getElementById("demo").innerHTML = mycar.show();

super method with class in javascript

class Animal{

  constructor()
  {
    this.walk = "walk";
  }
}
class Dog extends Animal{
constructor()
{
  super();
this.bark = "bark";
}

}

const dog = new Dog();
console.log(dog.walk);
/*must include BOTH extends and super()*/