SponsorBlockServer/src/utils/getFormattedTime.js

//converts time in seconds to minutes:seconds
module.exports = function getFormattedTime(totalSeconds) {
  let minutes = Math.floor(totalSeconds / 60);
  let seconds = totalSeconds - minutes * 60;
  let secondsDisplay = seconds.toFixed(3);
  if (seconds < 10) {
      //add a zero
      secondsDisplay = "0" + secondsDisplay;
  }

  let formatted = minutes+ ":" + secondsDisplay;

  return formatted;
}