JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="list">
 <li data-kind="foo">Foo1</li>
 <li data-kind="foo">Foo2</li>
 <li data-kind="foo">Foo3</li>
</ul>

JavaScript

var new_foo = jQuery('<li/>').data('kind', 'foo2').text('Foo4');
new_foo.appendTo($("#list"));

alert($("li:eq(3)").data("kind"));