JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/1.7.2/moment.min.js"></script>

JavaScript

var inDate = '08/11/2012';
var outDate = moment(inDate, "DD/MM/YYYY").format('DD-MMM-YYYY').toUpperCase();

document.write(outDate);