JSFiddle - React, Tailwind, and code Playground
by Stalk
HTML
<span kakpopalo="123">something</span>
<pre id="log1"></pre>
<pre id="log2"></pre>
JavaScript
document.querySelector('#log1').innerHTML =
document.querySelector('span').getAttribute('kakpopalo')
$('#log2').html($('span').attr('kakpopalo'))