Complete the capitalizeFirstLetter below while being sure to capitalize the initial letter of each word in the provided string.

capitalizeFirstLetter.js

/**
    Complete the capitalizeFirstLetter below while being sure to capitalize the initial letter of each word in the provided string.
  
    e.g.
    const str = "How can mirrors be real if our eyes aren't real"
    str.capitalizeFirstLetter() //-> "How Can Mirrors Be Real If Our Eyes Aren't Real"
**/

String.prototype.capitalizeFirstLetter = function () {}

String.prototype.capitalizeFirstLetter = function () {
	return this.split(" ").map(word => {
  	 return word.slice(0,1).toUpperCase() + word.slice(1)
  }).join(" ")
}

const str = "How can mirrors be real if our eyes aren't real"
const newStr = str.capitalizeFirstLetter() //-> "How Can Mirrors Be Real If Our Eyes Aren't Real"

console.log(newStr)

String.prototype.capitalizeFirstLetter = function () {
	return this.split(" ").map(word => word.charAt(0).toUpperCase() + word.slice(1)).join(" ")
}

const str = "How can mirrors be real if our eyes aren't real"
str.capitalizeFirstLetter() //-> "How Can Mirrors Be Real If Our Eyes Aren't Real"