JSFiddle - React, Tailwind, and code Playground

by Edward Tanguay

HTML

<div id="content"></div>

JavaScript

let elemContent = document.getElementById('content');
let seconds = 234;

elemContent.innerHTML = convertSecondsToHhmmss(seconds);

function convertSecondsToHhmmss(seconds) {
  hours = Math.floor(seconds / 3600);
  seconds %= 3600;
  minutes = Math.floor(seconds / 60);
  seconds = seconds % 60;
  return pad(hours,2) + ':' + pad(minutes,2) + ':' + pad(seconds,2);
}

function pad(num, size) {
    var s = num+"";
    while (s.length < size) s = "0" + s;
    return s;
}