? Function.prototype.call() in JavaScript

What is call()?

• call() is a method that invokes a function immediately, allowing you to specify the value of this inside that function.

• It also lets you pass arguments one by one.

Syntax

func.call(thisArg, arg1, arg2, ...);

• thisArg: The value to use as this inside the function.

• arg1, arg2, ...: Arguments passed individually to the function.

Example 1: Basic Usage

function greet(greeting, punctuation) {  console.log(greeting + ", " + this.name + punctuation);}const person = { name: "Alice" };greet.call(person, "Hello", "!");  // Output: Hello, Alice!

Example 2: Using call() to Borrow Methods

const person1 = {  fullName: function() {    return this.firstName + " " + this.lastName;  }};const person2 = {  firstName: "John",  lastName: "Doe"};// Borrow fullName method from person1console.log(person1.fullName.call(person2));  // Output: John Doe

Difference Between call() and apply()

Summary

Want me to show how to use call() for function borrowing or variadic functions?