JSFiddle - React, Tailwind, and code Playground

HTML

<form id="formid" action="my-dynamic-url">
    <input name="action" value="default" / >
</form>
<div id="t1"></div>
<div id="t2"></div>
<div id="t3"></div>

JavaScript

$('#formid').attr('action', 'qwerty');
$('#t1').text($('#formid').attr('action'));


$('form').get("formid").setAttribute('action', 'fofofof');
$('#t2').text($('#formid').attr('action'));

$('#t3').text($('input[name="action"]').val());