JSFiddle - React, Tailwind, and code Playground

HTML

<form id="formid" action="my-dynamic-url">
    <input name="random" value="default" / >
</form>
<div id="t1"></div>
<div id="t2"></div>

JavaScript

$('#formid').attr('action', 'my-new-url');
$('#t1').text($('#formid').attr('action'));


$('#formid')[0].setAttribute('action', 'my-new-url');
$('#t2').text($('#formid').attr('action'));