JSFiddle - React, Tailwind, and code Playground

HTML

<select id="select" class="myselect">
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>    
</select>

<select id="select2" class="myselect">
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>    
</select>

<select id="selec3" class="myselect">
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>    
</select>

<input type='text' id='hiddenNOT' value=''/>

JavaScript

$(".myselect").change(function () {
    $("#hiddenNOT").val($('#select').val() + '/' + $('#select2').val() + ' ' + $('#selec3').val());
});