convert minutes into seconds javascript

JavaScript
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
}
<!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>
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 );
Source