JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
<title>Javascript Test Code</title>
</head>
<body>
<div id="myDiv"></div>
</body>
</html>

JavaScript

var App = App || (function () {

  var myDiv = $('#myDiv'), // define a global jQuery element variable.  
        xyz = 'xyz';       // and a bogus variable as a test.  

  function test()
  {
    console.log('running test...','myDiv is', myDiv.length); // length is 0
    console.log('xyz is ', xyz); // says xyz

    console.log('running test...','myDiv is', myDiv.length); //length is 1
    console.log('xyz is ', xyz); // still says xyz
  }

  return {test:test} 

}());

$(function(){

  App.test();

});