JSFiddle - React, Tailwind, and code Playground

HTML

Welcome to Javascript Loader</a>
    <div id="alertme">Alert me!</div>
<script type="text/javascript" >
if (typeof jQuery == 'undefined') {
      alert( 'You need to install jQuery to proceed.!');

      var oHead = document.getElementsByTagName('head').item(0);
      var oScript= document.createElement("script");
      oScript.type = "text/javascript";
      oScript.src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js";
      oHead.appendChild( oScript);
		oScript.onload=onload;
}
else {
  alert( 'jQuery is present...' );
  onload();
}
function onload(){

alert( $('#alertme').html() );    
};
</script>