Javascript add leading zeroes to date

Question

I\'ve created this script to calculate the date for 10 days in advance in the format of dd/mm/yyyy:

var MyDate = new Date();
var MyDateString = new Date();
M         


        

Answer 1

You can define a "str_pad" function (as in php):

function str_pad(n) {
    return String("00" + n).slice(-2);
}

Answer 2

try this for a basic function, no libraries required

Date.prototype.CustomformatDate = function() {
 var tmp = new Date(this.valueOf());
 var mm = tmp.getMonth() + 1;
 if (mm < 10) mm = "0" + mm;
 var dd = tmp.getDate();
 if (dd < 10) dd = "0" + dd;
 return mm + "/" + dd + "/" + tmp.getFullYear();
};

Answer 3

I wrapped the correct answer of this question in a function that can add multiple leading zero's but defaults to adding 1 zero.

function zeroFill(nr, depth){
  depth = (depth === undefined)? 1 : depth;

  var zero = "0";
  for (var i = 0; i < depth; ++i) {
    zero += "0";
  }

  return (zero + nr).slice(-(depth + 1));
}

for working with numbers only and not more than 2 digits, this is also an approach:

function zeroFill(i) {
    return (i < 10 ? '0' : '') + i
  }

Answer 4

The following aims to extract configuration, hook into Date.protoype and apply configuration.

I've used an Array to store time chunks and when I push() this as a Date object, it returns me the length to iterate. When I'm done, I can use join on the return value.

This seems to work pretty fast: 0.016ms

// Date protoype
Date.prototype.formatTime = function (options) {
    var i = 0,
        time = [],
        len = time.push(this.getHours(), this.getMinutes(), this.getSeconds());

    for (; i < len; i += 1) {
        var tick = time[i];
        time[i] = tick < 10 ? options.pad + tick : tick;
    }

    return time.join(options.separator);
};

// Setup output
var cfg = {
    fieldClock: "#fieldClock",
    options: {
        pad: "0",
        separator: ":",
        tick: 1000
    }
};

// Define functionality
function startTime() {
    var clock = $(cfg.fieldClock),
        now = new Date().formatTime(cfg.options);

    clock.val(now);
    setTimeout(startTime, cfg.options.tick);
}

// Run once
startTime();

demo: http://jsfiddle.net/tive/U4MZ3/

Answer 5

Adding on to @modiX answer, this is what works...DO NOT LEAVE THAT as empty

today.toLocaleDateString("default", {year: "numeric", month: "2-digit", day: "2-digit"})

Answer 6

var MyDate = new Date();
var MyDateString = '';
MyDate.setDate(MyDate.getDate());
var tempoMonth = (MyDate.getMonth()+1);
var tempoDate = (MyDate.getDate());
if (tempoMonth < 10) tempoMonth = '0' + tempoMonth;
if (tempoDate < 10) tempoDate = '0' + tempoDate;
MyDateString = tempoDate + '/' + tempoMonth + '/' + MyDate.getFullYear();