JSFiddle - React, Tailwind, and code Playground

by Kanatantsin

JavaScript

function Duck(sound) {
  this.sound = sound;
  this.quack = function() {
    console.log(this.sound);
  }
}
var toy = new Duck("quack quack");
toy.quack();
console.log(typeof toy);
console.log(toy instanceof Duck);