JSFiddle - React, Tailwind, and code Playground

HTML

<select id="combo">
  <option value="1">Test 1</option>
  <option value="2">Test 2</option>
</select>
<input id="button1" type="button" value="Click!" />

JavaScript

$(document).ready(function(){ 
  $('#button1').click(function(){ 
    alert($('#combo').val());
    alert($('#combo option:selected').text());
  });
});