JSFiddle - React, Tailwind, and code Playground

HTML

<input id="data" value="Hello World" />
<div id="results">xx</div>

JavaScript

(function() {
var userdata = document.getElementById('data').value,
    uRev = userdata.split(" ").reverse().join(" ").split("").reverse().join("");
document.getElementById('results').innerHTML = uRev;
})();