JSFiddle - React, Tailwind, and code Playground
HTML
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
<input type="hidden" name="hidden" />
<button>
UPDATE HIDDEN ELEMENT VALUE
</button>JavaScript
$('input[name="hidden"]').change(function(){
alert($(this).val());
});
$('button').click(function(){
$('input[name="hidden"]').val('7').change();
});