Add a Leading Zero to a Number?

Question

Am looking to add a leading zero to Date minutes when under 10, while keeping it a number for querying

Followed the slice technique from javascript-add-leading-zeroes-to-date

This has yet to run for some reason:

var datetimeNow = new Date();
var minuteNow = datetimeNow.getMinutes();
// add a leading zero
if (minuteNow < 10 ) {
    var ZeroMinuteNow = ('0' + datetimeNow.getMinutes()).slice(-2);
    var minuteNow = parseInt(ZeroMinuteNow, 10);
    console.log(minuteNow);
}

Answer 1

How about this:

var datetimeNow = new Date();
var minuteNow = datetimeNow.getMinutes();
// add a leading zero
if (minuteNow < 10 ) {
var muestra = ('0'+ minuteNow);
console.log(muestra);
}