JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
<script>
function funk() {
var datee = new Date();
var x =datee.getFullYear() + '-' +('0' + (datee.getMonth()+1)).slice(-2)+ '-' +  ('0' + datee.getDate()).slice(-2) + ' '+datee.getHours()+ ':'+('0' + (datee.getMinutes())).slice(-2)+ ':'+datee.getSeconds();

  document.getElementById("demo").innerHTML = x;
}
</script>
</head>
<body>
<p id="demo" onclick="funk()">new old same old</p>
</body>
</html>