JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://jdpicker.paulds.fr/jquery.jdpicker.js"></script>
<span class='tst'>span</span>

JavaScript

var tst = $('.tst');
console.log(tst.selector);
// prints '.tst'
$('.tst').each(function() {
    alert($(this).text());
});
// prints undefined