JSFiddle - React, Tailwind, and code Playground

JavaScript

var element = { OrderTimeStamp : new Date() };

var yyyy = element.OrderTimeStamp.getFullYear()
var mm = element.OrderTimeStamp.getMonth();
var dd = element.OrderTimeStamp.getDate();

var x = yyyy + '-' + (mm < 10 ? '0'+mm : mm) + '-' + (dd < 10 ? '0'+dd : dd)

element.OrderTimeStamp = x;

alert(element.OrderTimeStamp);