How to get current formatted date dd/mm/yyyy in Javascript and append it to an input

I would like to add a current date to a hidden HTML tag so that it can be sent to the server:

<input type="hidden" id="DATE" name="DATE" value="WOULD_LIKE_TO_ADD_DATE_HERE">

How can I add a formatted date to the VALUE attribute?

I hope this is what you want:

const today = new Date();
const yyyy = today.getFullYear();
let mm = today.getMonth() + 1; // Months start at 0!
let dd = today.getDate();

if (dd < 10) dd = '0' + dd;
if (mm < 10) mm = '0' + mm;

today = dd + '/' + mm + '/' + yyyy;

document.getElementById('DATE').value = today;

https://stackoverflow.com/questions/1531093/how-to-get-current-date-in-javascript

I honestly suggest that you use moment.js. Just download moment.min.js and then use this snippet to get your date in whatever format you want:

<script>
$(document).ready(function() {

     // set an element
     $("#date").val( moment().format('MMM D, YYYY') );

     // set a variable
     var today = moment().format('D MMM, YYYY');

});
</script>

Use following chart for date formats:

<input type="hidden" id="date"/>
<script>document.getElementById("date").value = new Date().toJSON().slice(0,10)</script>

By using the value attribute:

var today = new Date();
document.getElementById('DATE').value += today;

To get current date/time in javascript:

var date = new Date();

If you need milliseconds for easy server-side interpretation use

var value = date.getTime();

For formatting dates into a user readable string see this

Then just write to hidden field:

document.getElementById("DATE").value = value;

Use the DOM's getElementByid method:

document.getElementById("DATE").value = "your date";

A date can be made with the Date class:

d = new Date();

(Protip: install a javascript console such as in Chrome or Firefox' Firebug extension. It enables you to play with the DOM and Javascript)

You edit an element's value by editing it's .value property.

document.getElementById('DATE').value = 'New Value';