What is the use Function.prototype.call method?

The call invokes a function specifying the this or the "owner" object of that function on that time of invocation.

const details = {
  message: 'Hello World!'

function getMessage(){
  return this.message;

getMessage.call(details); // returns 'Hello World!'

This method works like Function.prototype.apply the only difference is how we pass arguments. In call we pass directly the arguments separating them with a comma , for every argument.

const person = {
  name: "Marko Polo"

function greeting(greetingMessage) {
  return `${greetingMessage} ${this.name}`;

greeting.call(person, 'Hello'); // returns "Hello Marko Polo!"