JSFiddle - React, Tailwind, and code Playground

by brigand

HTML

<h1 id="out"></h1>

JavaScript

function time(seconds) {
  const d = new Date();
  d.setHours(0, 0, seconds, 0);
  return d.toLocaleTimeString('local', { hour: 'numeric', minute: 'numeric' });
}

out.textContent = time(50400)