JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<input type="hidden" id="myHiddenField">
<button id="btnChange">
Change content in hidden field
</button>

JavaScript

$('#myHiddenField').on('change', function() {
	alert('content changed to: ' + $('#myHiddenField').val());
});

$('#btnChange').click(function() {
	$('#myHiddenField').val("new content");
	$('#myHiddenField').trigger('change');
});