JSFiddle - React, Tailwind, and code Playground

by natarajgandhi

HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<input type="hidden" id="test-var" name="country" value="Norway">

<a id="link-test" href="abcd.com" data-structure="doctree">hi</a>

JavaScript

var a = undefined;

var hdn = $('#test-var').val();

alert(hdn);

if(typeof hdn == 'undefined')
{
	alert('yes hdn is undefined');
}
if(typeof hdn != 'undefined')
{
	alert('no hdn is not undefined');
}

var lnk = $('#link-test').attr('data-structure');

if(typeof lnk == 'undefined')
{
	alert('yes lnk is undefined');
}
if(typeof lnk != 'undefined')
{
	alert('no lnk is not undefined');
}

alert('pass');