Convert a Unix timestamp to time in JavaScript

Question

I am storing time in a MySQL database as a Unix timestamp and that gets sent to some JavaScript code. How would I get just the time out of it?

For example, in HH/MM/

Answer 1

You can use the following function to convert your timestamp to HH:MM:SS format :

var convertTime = function(timestamp, separator) {
    var pad = function(input) {return input < 10 ? "0" + input : input;};
    var date = timestamp ? new Date(timestamp * 1000) : new Date();
    return [
        pad(date.getHours()),
        pad(date.getMinutes()),
        pad(date.getSeconds())
    ].join(typeof separator !== 'undefined' ?  separator : ':' );
}

Without passing a separator, it uses : as the (default) separator :

time = convertTime(1061351153); // --> OUTPUT = 05:45:53

If you want to use / as a separator, just pass it as the second parameter:

time = convertTime(920535115, '/'); // --> OUTPUT = 09/11/55

---

Demo

var convertTime = function(timestamp, separator) {
    var pad = function(input) {return input < 10 ? "0" + input : input;};
    var date = timestamp ? new Date(timestamp * 1000) : new Date();
    return [
        pad(date.getHours()),
        pad(date.getMinutes()),
        pad(date.getSeconds())
    ].join(typeof separator !== 'undefined' ?  separator : ':' );
}

document.body.innerHTML = '
' + JSON.stringify({
    920535115 : convertTime(920535115, '/'),
    1061351153 : convertTime(1061351153, ':'),
    1435651350 : convertTime(1435651350, '-'),
    1487938926 : convertTime(1487938926),
    1555135551 : convertTime(1555135551, '.')
}, null, '\t') +  '
';

See also this Fiddle.