JSFiddle - React, Tailwind, and code Playground

HTML

<div id="view"></div>

JavaScript

function LongestWord(sentence) {
    return Array.apply(window, sentence.match(/\w+/g))
                .reduce(function (c, r) { return c.length > r.length ? c : r });
}

document.getElementById("view").innerHTML = LongestWord("fun&!! time");