JSFiddle - React, Tailwind, and code Playground

HTML

<html>
  <body>
    <div id="output">?</div>
  </body>
</html>

JavaScript

var now = new moment(new Date());

if (now.seconds() > 0) {
    now.add('minutes', -1);
}

document.getElementById("output").innerHTML = now.seconds(0);