Leading zeros in minutes

And what is your issue?

var minutes = (current.getMinutes() < 10? '0' : '') + current.getMinutes();

Since you'll have the same problem with hours, wrap it in a small utility function:

function pad(var value) {
    if(value < 10) {
        return '0' + value;
    } else {
        return value;
    }
}

And later simply:

pad(current.getHours()) + ":" + pad(current.getMinutes())

You can just grab the first 5 characters of the time string.

(new Date()).toTimeString().substr(0,5)

Since you're likely to run into presentational issues in the future along the same lines, I'd recommend picking a favorite string formatting function for Javascript.

Some examples:

• http://www.masterdata.se/r/string_format_for_javascript/
• http://www.diveintojavascript.com/projects/javascript-sprintf

Then you can do something like "{0:00}:{1:00}".format(current.getHours(), current.getMinutes()) or even better,

var d = new Date();
var s = d.format("hh:mm:ss tt");
// Result: "02:28:06 PM"

I like this way of doing things... Javascript add leading zeroes to date

const d = new Date();
const date = (`0${d.getMinutes()}`).slice(-2);
console.log(date); // 09;

2019 Update: But I now prefer

const d = new Date();
const date = String(d.getMinutes()).padStart(2, '0');
console.log(date); // 09;