JSFiddle - React, Tailwind, and code Playground

by ha ha

HTML

<div id="datatime"></div>

JavaScript

//let unix_timestamp = 1589722429460
/* var date = new Date(unix_timestamp * 1000);
var hours = date.getHours();
var minutes = "0" + date.getMinutes();
var formattedTime = hours + ':' + minutes.substr(-2); */

let unix_timestamp = 1589722429460;
var date = new Date(unix_timestamp);
var year = date.getFullYear();
var month = ("0" + (date.getMonth() + 1)).substr(-2);
var day = ("0" + date.getDate()).substr(-2);
var hour = ("0" + date.getHours()).substr(-2);
var minutes = ("0" + date.getMinutes()).substr(-2);
var seconds = ("0" + date.getSeconds()).substr(-2);
var formattedTime = year + "-" + month + "-" + day + " " + hour + ":" + minutes + ":" + seconds;

document.getElementById("datatime").innerHTML = formattedTime;