JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>

<body>

<button onclick="myFunction()">Validate</button>

<p id="test"></p>

</body>

JavaScript

function myFunction() {
    var a = isNaN(123) + "<br>";
    var b = isNaN(-1.23) + "<br>";
    var c = isNaN(123-456) + "<br>";
    var d = isNaN("Hello") + "<br>";
    var e = isNaN("2014/11/19") + "<br>";

    var result = a + b + c + d + e;
    document.getElementById("test").innerHTML = result;
}