Timer

by Lestrae

HTML

<div>
  <span id='minutes'></span>:<span id='seconds'></span>
</div>

JavaScript

let minutes = 0;
let seconds = 0;

setInterval(function timer() {
  seconds = ++seconds;

  if (seconds == 60) minutes++;

  document.getElementById('minutes').innerHTML = minutes;
  document.getElementById('seconds').innerHTML = seconds;

}, 1000);