JavaScript seconds to time string with format hh:mm:ss

Question

I want to convert a duration of time, i.e., number of seconds to colon-separated time string (hh:mm:ss)

I found some useful answers here but they all talk about converting to x hours and x minutes format.

So is there a tiny snippet that does this in jQuery or just raw JavaScript?

Answer 1

String.prototype.toHHMMSS = function () {     var sec_num = parseInt(this, 10); // don't forget the second param     var hours   = Math.floor(sec_num / 3600);     var minutes = Math.floor((sec_num - (hours * 3600)) / 60);     var seconds = sec_num - (hours * 3600) - (minutes * 60);      if (hours   < 10) {hours   = "0"+hours;}     if (minutes < 10) {minutes = "0"+minutes;}     if (seconds < 10) {seconds = "0"+seconds;}     return hours+':'+minutes+':'+seconds; } 

You can use it now like:

alert("5678".toHHMMSS()); 

Working snippet:

String.prototype.toHHMMSS = function () {      var sec_num = parseInt(this, 10); // don't forget the second param      var hours   = Math.floor(sec_num / 3600);      var minutes = Math.floor((sec_num - (hours * 3600)) / 60);      var seconds = sec_num - (hours * 3600) - (minutes * 60);        if (hours   < 10) {hours   = "0"+hours;}      if (minutes < 10) {minutes = "0"+minutes;}      if (seconds < 10) {seconds = "0"+seconds;}      return hours + ':' + minutes + ':' + seconds;  }        console.log("5678".toHHMMSS());