JSFiddle - React, Tailwind, and code Playground
HTML
<form method="get" action="">
<input type="text" name="myInput" value="Change Me!"/>
</form>
<textarea name="log" id="log" cols="30" rows="10">Changelog</textarea>
JavaScript
$('input[name=myInput]').on('change', function(){
$('#log').val($('#log').val()+"\n"+"Change!");
});