JSFiddle - React, Tailwind, and code Playground

HTML

<table>

<tr>
<td class="sorting_1">
  <input />
</td>
</tr>

</table>

JavaScript

var td1 = document.getElementsByClassName("sorting_1")[0];
var input = td1.children[0];
input.setAttribute('dummy','test');
console.log(input.getAttribute('dummy'));