Function.prototype.call()

function Product(name, price) {
  this.name = name;
  this.price = price;
}

function Food(name, price) {
  Product.call(this, name, price);
  this.category = "food";
}

console.log(new Food("cheese", 5).name);
// Expected output: "cheese"

    func.call(thisArg[, arg1[, arg2[, ...]]])

function Product(name, price) {
  this.name = name;
  this.price = price;

  if (price < 0) {
    throw RangeError(
      "Cannot create product " + this.name + " with a negative price",
    );
  }
}

function Food(name, price) {
  Product.call(this, name, price);
  this.category = "food";
}

function Toy(name, price) {
  Product.call(this, name, price);
  this.category = "toy";
}

var cheese = new Food("feta", 5);
var fun = new Toy("robot", 40);

var animals = [
  { species: "Lion", name: "King" },
  { species: "Whale", name: "Fail" },
];

for (var i = 0; i < animals.length; i++) {
  (function (i) {
    this.print = function () {
      console.log("#" + i + " " + this.species + ": " + this.name);
    };
    this.print();
  }).call(animals[i], i);
}

function greet() {
  var reply = [this.animal, "typically sleep between", this.sleepDuration].join(
    " ",
  );
  console.log(reply);
}

var obj = {
  animal: "cats",
  sleepDuration: "12 and 16 hours",
};

greet.call(obj); // cats typically sleep between 12 and 16 hours

var sData = "Wisen";
function display() {
  console.log("sData value is %s ", this.sData);
}

display.call(); // sData value is Wisen

"use strict";

var sData = "Wisen";

function display() {
  console.log("sData value is %s ", this.sData);
}

display.call(); // Cannot read the property of 'sData' of undefined