how to convert number in seconds javascript code example

Example 1: javascript convert seconds to minutes seconds

function convertHMS(value) {
    const sec = parseInt(value, 10); // convert value to number if it's string
    let hours   = Math.floor(sec / 3600); // get hours
    let minutes = Math.floor((sec - (hours * 3600)) / 60); // get minutes
    let seconds = sec - (hours * 3600) - (minutes * 60); //  get seconds
    // add 0 if value < 10; Example: 2 => 02
    if (hours   < 10) {hours   = "0"+hours;}
    if (minutes < 10) {minutes = "0"+minutes;}
    if (seconds < 10) {seconds = "0"+seconds;}
    return hours+':'+minutes+':'+seconds; // Return is HH : MM : SS
}

Example 2: how to convert minutes into seconds in javascript

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>convert minutes to seconds in javascript</title>
</head>
<body>
  <script type = "text/javascript">
    function convertMinutestoSeconds(minutes) 
    {
      return Math.floor(minutes * 60);
    }
    var minutesToSeconds = convertMinutestoSeconds(2); // convert minutes to second javascript 
    document.write( "Result of converting minutes to seconds :- " + minutesToSeconds ); 
 
  </script>  
</body>
</html>

Example 3: convert seconds to hours minutes seconds javascript

function secondsToHms(d) {
    d = Number(d);
    var h = Math.floor(d / 3600);
    var m = Math.floor(d % 3600 / 60);
    var s = Math.floor(d % 3600 % 60);

    var hDisplay = h > 0 ? h + (h == 1 ? " hour, " : " hours, ") : "";
    var mDisplay = m > 0 ? m + (m == 1 ? " minute, " : " minutes, ") : "";
    var sDisplay = s > 0 ? s + (s == 1 ? " second" : " seconds") : "";
    return hDisplay + mDisplay + sDisplay; 
}

Example 4: javascript minute and second to convert seconds

function str_pad_left(string,pad,length) {
    return (new Array(length+1).join(pad)+string).slice(-length);
}

var finalTime = str_pad_left(minutes,'0',2)+':'+str_pad_left(seconds,'0',2);