How can I convert a date in Epoch to “Y-m-d H:i:s” in Javascript?

Question

How can I convert following date in epoch:

1293683278

to following readable date:

2010-06-23 09:57:58

Answer 1

/* Get timestamp */
var timestamp = 1293683278;
document.querySelector("#timestamp").innerHTML = "Timestamp: " + timestamp;

/* Get milisecond from timestamp */
var milisecond = 1293683278 * 1000;    
document.querySelector("#milisecond").innerHTML = "Milisecond: " + milisecond;
  
/* Separate milisecond */
var datetime = new Date(milisecond);

var year    = datetime.getFullYear();
var month   = datetime.getMonth() + 1; // (0-11)
var date    = datetime.getDate();
var hour    = datetime.getHours();
var minute  = datetime.getMinutes();
var second  = datetime.getSeconds();

document.querySelector("#datetime").innerHTML = "Datetime: " + 
  year + "-" + addZero(month) + "-" + addZero(date) + " " + 
  addZero(hour) + ":" + addZero(minute) + ":" + addZero(second);      

// Add 0 if argument < 10
function addZero(i) {
  if (i < 10) {
    i = "0" + i
  };  
  return i;
}