JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
  <head>
    <style>
      #foo {
        border: solid blue 1px;
        width: 30%;
        padding: 10px;
      }
    </style>
  </head>
  <body>
    <p id="foo">My Event Element</p>
    <p>Click on the above element..</p>
  </body>
</html>

<script>
  function bar() {
    var p = document.getElementById("foo");
    p.onclick = showAlert;
    var x = 5;
    alert("bar function was called !");