JSFiddle - React, Tailwind, and code Playground

by Marcuzzo

HTML

<select id="tickets">
    <option value="1">ticket one</option>
    <option value="2">ticket two</option>
    <option value="3">ticket three</option>
</select>

<select id="fiftytickets">
    <option value="55-1">fifty-one</option>
    <option value="55-2">fifty-two</option>
    <option value="55-3">fifty-three</option>
</select>

<input type="text" id="output" value="" />

JavaScript

$('#tickets').change(function() {
   $('#output').val($(this).val() + " - " + $('#fiftytickets').val());
});
$('#fiftytickets').change(function() {
   $('#output').val($('#tickets').val() + " - " + $(this).val());
});