Answers for "javascript function that also measure seconds into miliseconds"

convert milliseconds to minutes and seconds javascript

const millisToMinutesAndSeconds = (millis) => {
    var minutes = Math.floor(millis / 60000);
    var seconds = ((millis % 60000) / 1000).toFixed(0);
	//ES6 interpolated literals/template literals 
  	//If seconds is less than 10 put a zero in front.
    return `${minutes}:${(seconds < 10 ? "0" : "")}${seconds}`;
}

how to convert seconds in hours minutes and seconds js

function convertSeconds(seconds) {
  var convert = function(x) { return (x < 10) ? "0"+x : x; }
  return convert(parseInt(seconds / (60*60))) + ":" +
         convert(parseInt(seconds / 60 % 60)) + ":" +
         convert(seconds % 60)
}