JSFiddle - React, Tailwind, and code Playground

HTML

<div data-test="lala">asdf</div>

JavaScript

alert($('div').data('test'));
var t = 'data-test2';
var v = 'hiho';
$('div').attr(t,v);
alert($('div').data('test2'));
alert($('div').attr('data-test2'));