JSFiddle - React, Tailwind, and code Playground

HTML

<input id="mytime" name="mytime" type="datetime" value="2011-08-18T16:49Z" />
<a href="#" onclick="formatTime(); return false;">Click to output formatted time</a>
<div id="output"></div>

JavaScript

function formatTime() {
    // Load datetime string into js date object 
    var d = new Date(document.getElementById('mytime').value)
    
    // Output date as month/day/year
    document.getElementById('output').innerHTML = (d.getMonth()+1) + '/' + d.getDate() + '/' + d.getFullYear();
}