JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery.js"></script>
<html>
    <body>
        <input id="foo" data-someThing="bar" type="text">
    </body>
</html>

JavaScript

$(function() {
    // used to work in 1.5.2
    alert($('#foo').data('someThing')); 
    
    // works in 1.6 but seems wrong
    alert($('#foo').data('something'));
});