Kata Solution (Codewars) 5 KYU The Hashtag Generator with Javascript

kata-5kyu-the-hashtag-generator.js

// ************************************************************************************
// https://www.codewars.com/kata/the-hashtag-generator
// The marketing team is spending way too much time typing in hashtags.
// Let's help them with our own Hashtag Generator!

// Here's the deal:

// It must start with a hashtag (#).
// All words must have their first letter capitalized.
// If the final result is longer than 140 chars it must return false.
// If the input or the result is an empty string it must return false.
// Examples:
// " Hello there thanks for trying my Kata"  =>  "#HelloThereThanksForTryingMyKata"
// "    Hello     World   "                  =>  "#HelloWorld"
// ""                                        =>  false
// ************************************************************************************

function generateHashtag(str) {
	if (!str.trim()) return false;

	const capitalize = str.replace(/\s+/g, " ").trim().split(" ")
		.map((word) => `${word[0].toUpperCase()}${word.slice(1)}`);

	const result = ["#", ...capitalize].join("");
	return result.length > 140 ? false : result;
}