JSFiddle - React, Tailwind, and code Playground

HTML

<form id="cash-form" action="" method="get">
    <input id="amount" name="amount" />
    <input type="submit" value="Format" />
</form>

<div id="formatted"></div>

JavaScript

Locale.use("EU");

$('cash-form').addEvent('submit', function(event) {
   event.stop();

   var amount = $('amount').get('value').toFloat();
   
   $('formatted').set('text', amount.formatCurrency());
});